TWI609669B - Bone fixation device - Google Patents

Description

Bone fixation device

The present invention relates to a bone fixation device, and more particularly to a bone fixation device having a covering unit and an unfolding structure and capable of being deployed by mechanical force to expand the bone.

In the practice of instilling or inserting medical fillers into the bone, the conventional techniques that are currently common have the following categories:

The first type of conventional technique utilizes a conventional mechanical reaming device (e.g., U.S. Patent Nos. 2,010,196, 494, 20,110, 184, 447, 20, 001, 764, s, s, s, s, s, s, s, s, s, s, s, s, s, s, s, s. After the reaming is completed, the reaming device is taken out, and then placed in the wrapping unit, and then the operation of pouring or inserting the medical filler is performed. Such prior art has the following disadvantages: the cancellous bone fragments crushed by the conventional mechanical reaming device during reaming often fall into the mechanical reaming device to make the mechanical reaming The device is stuck, causing the reaming element to be unrecoverable (returning to a contracted state), causing the entire mechanical reaming device to be stuck in the reaming portion and unable to be removed.

The second type of conventional technique is to use a conventional filling type reaming device (for example, U.S. Patent Nos. 5972015, 6066154, 6235043, 6423083, 6607544, 6623305, 6663647, 6716216) to perform bone reaming to create a space in the bone to complete the expansion. After the hole is removed, the reaming device is taken out, and then placed in the coating unit, and then the operation of pouring or inserting the medical filler is performed. Since the filling type reaming device mostly puts a balloon into the bone, using a high pressure, a liquid (such as water) is poured into the balloon (depending on In the same demand, using a variety of balloons), the balloon is inflated to push the cancellous bone in the bone to achieve the purpose of reaming; however, the device/method has many disadvantages, such as: the balloon must be The nozzle is connected. Therefore, when the high pressure is poured into the liquid, the balloon may be detached from the nozzle, and even a balloon may be broken.

The third type of conventional technique is to directly insert the coating unit into the bone and infuse the medical filler without pre-reaming, and use the pressure of the medical filler to infuse the coating unit to achieve the effect of expanding the bone. . The coating unit has the functions of a reaming device and a bone fixing device when injecting a medical filler (for example, the Republic of China Patent Publication No. I321467, I392474; U.S. Patent No. 6,248,110), or even abandoning the coating unit, and directly utilizing one The infusion device infuse the medical filler into the surgical site to enhance fixation of the surgical site (e.g., U.S. Patent 5,514,137). Such prior art has the following disadvantages: since the reaming is not performed first, the range of perfusion cannot be accurately controlled, so that the direction after completion of the perfusion may occur differently from the doctor's original expectation; in addition, it may even appear in the irrigation After the medical filler, it is found that the coating unit does not completely support the bone, or the medical filler flows around the bone, flows out of the bone, or even the concentration of the slurry medical filler is too thin or the particle size is too small, so that When the medical filler is poured, the bones and the like cannot be smoothly opened, thereby greatly reducing the effectiveness that should have been achieved.

The fourth type of conventional technique utilizes a conventional mechanical reaming device as a bone fixation device (for example, U.S. Patent Nos. 20120071977, 20110046739, 20100069913, 20100217335, 20090234398, 20090005821), implanting bones in a mechanical reaming device, and supporting After the bone is opened, the medical filler is filled, the medical filler is covered with the mechanical reaming device, and after the infusion is completed, the mechanical reaming device and the medical filler are left together in the human body. Such conventional techniques have two very serious problems because they do not have a cladding unit: First: the flow of medical fillers cannot be effectively controlled, so that medical fillers may flow around the bones and may even flow out of the bones; Second: prior to the filling of the medical filler, during the filling process or before the full perfusion but not yet fully solidified, the conventional mechanical reaming device is affected by the external force when it is deployed, and then the contraction occurs inside the bone. . Conventional mechanical reaming devices, once slightly contracted, will reduce the effect of distracting the bone. In severe cases, even completely return to the contracted state, so that the conventional mechanical reaming device will completely lose the effect of expanding the bone.

In order to solve the two problems arising from the fourth type of conventional technology, the applicant has proposed a bone fixation device (Republic of China Patent Publication No. I503097), which utilizes a deployment unit to cover the deployment structure of the deployment device, and effectively expands The hole prevents the crushed cancellous bone fragments from falling into the deployment device, allowing the deployment structure of the deployment device to expand and contract within the bone for reaming. In addition, when injecting the medical filler, the device can effectively control the range of the medical filler infusion, avoiding the medical filler from smashing in the bone, and after the filling is completed, the medical filler can completely cover the unfolding structure of the deployment device. To avoid the possibility of shrinking the unfolding structure of the deployment device. However, the structure of the deployment structure of the deployment device of the bone fixation device is relatively simple, and since the bone hardness and the bone collapse mode of each patient are not completely the same, the deployment structure of the deployment device cannot be different for different patient conditions. Make the corresponding adjustments. Furthermore, during the implementation process, it was found that when the bone fixation device was used on a patient with high bone hardness, the expansion effect was not as expected.

Therefore, the applicant further developed a bone fixation device (Republic of China Patent Publication No. 201536248), which can increase the strength of the expansion unit by setting a plurality of expansion structures on the deployment unit, so that the expansion unit can support the harder bone hardness. Bone, it is better to adjust the length and arrangement of each unfolding structure to cope with various bone collapse situations. The effect is better than the Republic of China Patent No. I503097.

The applicant did not feel complacent because of the technology to develop problems that could overcome the problems of the prior art. Therefore, in the spirit of excellence, he continued to work on the research and development of bone fixation devices, and finally developed the first generation of bone fixation devices than the applicants. A newer generation of bone fixation devices.

SUMMARY OF THE INVENTION One object of the present invention is to provide a bone fixation device in which an extrusion unit is configured to expand and deploy a deployment structure, and after the deployment structure is deployed, the anti-retraction unit can prevent the expansion structure from being slightly contracted or completely retracted when subjected to an external force in an unfolded state. The state of contraction, so that the covering unit is maintained in the expanded state before the medical filler is filled, during the filling process, or completely perfused but not completely solidified, maintaining the bone fixation device of the present invention to expand the bone effect.

Another object of the present invention is to provide a bone fixation device, wherein the threaded anti-backup unit can be used for the first and second extrusion members to control the deployment and contraction of the deployment structure in a spiral manner, so that the deployment structure can be smoothly deployed in the bone. And shrinking to ream the hole to adjust the direction of the reaming or the size of the reaming range, and also to prevent the unfolding structure from slightly shrinking or completely returning to the contracted state when the unfolded state is affected by the external force.

A further object of the present invention is to provide a bone fixation device, wherein when the single-row block-barb type anti-backup unit is staggered, the first and second extrusion members can be controlled to expand and contract the deployment structure, so that the deployment structure can be The bones are smoothly unfolded for reaming; when the single-row block-barb type anti-backup unit is engaged in the position, it is possible to prevent the unfolded structure from contracting slightly or completely returning to the contracted state when the deployed state is affected by an external force.

Still another object of the present invention is to provide a bone fixation device capable of preventing the strength of an external force from being stronger when the plurality of block-shaped barb type anti-backup units can be engaged in the alignment, and further preventing the deployment structure from being affected by an external force in the deployed state. The effect of slightly contracting or completely returning to the contracted state.

Still another object of the present invention is to provide a bone fixation device which can restrict the unfolding of the first and second extrusion members in a one-way control deployment manner to prevent the deployment structure from being slightly affected by the external force when the deployment state is affected. The effect of contracting or completely returning to a contracted state.

Another object of the present invention is to provide a bone fixation device. When the deployment structure is in an unfolded state, the medical filler sequentially passes through the second shaft hole of the second extrusion member, the second side hole of the second extrusion member, and the first The first side hole of the extrusion and the void of the unfolded structure are then gradually filled in the range covered by the cladding unit.

Still another object of the present invention is to provide a bone fixation device having first and second side holes extending in a staggered direction, capable of maintaining at least a portion of each other in alignment with each other regardless of how the first and second extrusion members rotate, so that the medical filler Corresponding to the first and second side holes.

Another object of the present invention is to provide a bone fixation device which utilizes a covering unit to cover a deployment structure, so that when the bone fixation device is reamed by surgery, the crushed cancellous bone fragments are effectively prevented from falling into the extrusion unit and In the unfolded structure, the unfolded structure can be smoothly expanded and contracted in the bone to ream the hole to adjust the direction of the reaming or the size of the reaming range.

Still another object of the present invention is to provide a bone fixation device that can effectively control the range of perfusion of medical fillers and prevent medical fillers from smashing in the bones.

Another object of the present invention is to provide a bone fixation device in which a small amount or a portion of a medical filler can be exuded from the pores of the coating unit to be integrated with the trabecular bone.

In order to achieve the foregoing objects, the present invention provides a bone fixation device including an extrusion unit, a deployment structure, a cladding unit, and an anti-backup unit.

The pressing unit includes a first pressing member and a second pressing member. The first pressing member has a distal end and a proximal end, and defines a first shaft hole and at least one first side hole. a first shaft hole penetrating the proximal end of the first extrusion member, the first side hole is in communication with the first shaft hole, and the second extrusion member is movably disposed on the first extrusion member and has a distal end And a proximal end, and forming a second shaft hole and at least one second side hole, the second shaft hole penetrating the distal end and the proximal end of the second extrusion member and the first shaft hole and the second side The holes are connected.

The unfolding structure has a distal end and a proximal end and a plurality of gaps are formed. The distal end and the proximal end of the unfolding structure are respectively disposed on the first and second extrusion members, wherein when the second extrusion member is When the direction of the distal end of the first extrusion member is moved, the deployment structure is pressed by the first and second extrusion members to expand outward to an unfolded state, and the first side hole is aligned with the second side hole. The first and second shaft holes are communicated with the gap of the unfolding structure by the first and second side holes.

The covering unit has a distal end and a proximal end, and the distal end and the proximal end of the covering unit are respectively disposed on the first and second pressing members, and the covering unit covers the unfolding structure, wherein When the unfolded structure is deployed to the unfolded state, the wrap unit is expanded by the unfolded structure.

The anti-backup unit is disposed in the pressing unit, wherein when the unfolding structure is deployed to the unfolded state, the first pressing member selectively restricts the second pressing member by the anti-backing unit, so that the The second extrusion cannot move linearly in the direction of the proximal end of the first extrusion, keeping the deployed structure in an unfolded state.

Preferably, the anti-backup unit includes a first anti-retraction structure and a second anti-retraction structure, wherein the first anti-retraction structure is disposed on the first extrusion member, and the second anti-retraction structure is disposed on the second extrusion a pressing member, wherein the first pressing member selectively restricts the second squeezing structure by the first anti-backing structure selectively restricting the second squeezing structure when the unfolding structure is unfolded to an unfolded state The pressing member prevents the second pressing member from linearly moving in the direction of the proximal end of the first pressing member, so that the unfolded structure is maintained in an unfolded state.

Preferably, the first anti-backup structure is disposed on an inner wall surface of the first shaft hole, the second anti-backup structure is disposed on an outer wall surface of the second extrusion member, and the second extrusion member is disposed on the first surface Shaft hole.

Preferably, the second pressing member comprises a sleeve, a fixing ring and a rod body, the sleeve comprises a small diameter section, a sawtooth section and a large diameter section and forms a sleeve shaft extending through the two ends thereof a hole, the proximal end of the unfolding structure is disposed on the small diameter section of the sleeve, the fixing ring is disposed on the serration section of the sleeve and fixes the proximal end of the covering unit, the rod body comprises a small diameter section and a Large diameter section, the small diameter section of the rod has a distal end and a proximal end, the large diameter section of the rod body has a distal end and a proximal end, and the proximal end of the small diameter section of the rod body is coupled to the distal end of the large diameter section of the rod body, the rod body The small diameter section passes through the sleeve shaft hole and forms the second side hole, and the outer diameter of the large diameter section of the rod body is equal to the outer diameter of the large diameter section of the sleeve, so that the large diameter section of the rod body The distal end abuts against the large diameter section of the sleeve, the rod body forms the second shaft hole, the second shaft hole penetrates the distal end of the small diameter section of the rod body and the proximal end of the large diameter section of the rod body The second anti-backup structure is disposed on an outer wall surface of the small diameter section of the rod body.

Preferably, the first anti-backup structure is an internal thread, and the second anti-backup structure is an external thread.

Preferably, the first anti-backup structure is disposed on the outer wall surface of the first extrusion member, and the first extrusion member is disposed on the second shaft hole, and the second anti-retraction structure is disposed on the second axial hole Inner wall surface.

Preferably, the second pressing member comprises a sleeve, a fixing ring and a rod body, the sleeve comprises a small diameter section, a sawtooth section and a large diameter section and forms a sleeve shaft extending through the two ends thereof a hole, the proximal end of the unfolding structure is disposed on the small diameter section of the sleeve, the fixing ring is disposed on the serration section of the sleeve and fixes the proximal end of the covering unit, the rod body comprises a small diameter section and a In the large diameter section, the small diameter section of the rod body has a distal end and a proximal end, the large diameter section of the rod body has a distal end and a proximal end, and the proximal end of the small diameter section of the rod body is coupled to the rod a distal end of the large diameter section of the body, the small diameter section of the rod body passes through the sleeve shaft hole and forms the second side hole, and the outer diameter of the large diameter section of the rod body is equal to the large diameter section of the sleeve An outer diameter, the distal end of the large diameter section of the rod abuts against the large diameter section of the sleeve, the rod body forms the second shaft hole, and the second shaft hole penetrates the small diameter section of the rod body The end and the proximal end of the large diameter section of the shaft.

Preferably, the second shaft hole comprises a small diameter section, a polygonal hole section and a threaded section, and the small diameter section of the second shaft hole penetrates the small diameter section of the rod body, and the polygonal hole section is located on the rod a large diameter section of the body and extending through a proximal end of the large diameter section of the rod body, the threaded section of the second shaft hole being located in the large diameter section of the rod body and communicating with the small diameter section of the second shaft hole and the Between the multi-angle holes.

Preferably, the bone fixation device further comprises an assist deployment unit, the assist deployment unit comprising a housing, an operating member, an auxiliary tube and a conduit. The housing has a distal end and a proximal end. The operating member is disposed at a proximal end of the housing. The auxiliary tube is movably disposed on the housing, has a distal end and a proximal end, and defines a through hole extending through the distal end and the proximal end. The proximal end of the auxiliary tube is disposed on the operating member, and the auxiliary tube is far The end is polygonal and embedded in the polygonal hole section of the second shaft hole. The catheter is disposed at the insertion hole of the auxiliary tube and has a distal end and a proximal end. The distal end of the catheter protrudes from the distal end of the auxiliary tube and is screwed to the threaded section of the second shaft hole.

Preferably, the assisting deployment unit further comprises a sleeve having a distal end and a proximal end and forming a through hole extending through the distal end and the proximal end, the auxiliary tube being exposed to a portion of the housing A through hole of the sleeve is provided, and a distal end of the auxiliary tube protrudes from a distal end of the sleeve.

Preferably, the bone fixation device further comprises an injection unit, the injection unit comprising a body, a pushing member, an extension tube, a sleeve and a conduit. The body has a distal end and a proximal end, and is internally provided with a medical filler. The pushing member is disposed at a proximal end of the body. The extension tube has a distal end and a proximal end, and forms a first-class channel. The proximal end of the extension tube is disposed at a distal end of the body, and the flow path of the extension tube communicates with the interior of the body. The sleeve has a distal end and a proximal end and defines a through hole extending through the distal end and the proximal end. The catheter has a distal end and a proximal end. The catheter is disposed in the through hole of the sleeve. The distal end of the catheter protrudes from the distal end of the sleeve and is screwed to the threaded portion of the second shaft hole. The proximal end of the catheter protrudes from the proximal end of the sleeve and is disposed at a distal end of the extension tube, and the inside of the catheter communicates with the flow path of the extension tube.

Preferably, the first anti-backup structure is an external thread, and the second anti-backup structure is an internal thread.

Preferably, the first anti-backup structure comprises a plurality of first block barbs, the first block barbs are axially arranged in a row or a plurality of rows, and the second anti-backup structure comprises a plurality of second block-like bars. The hooks, the second block barbs are axially arranged in a row or in a plurality of rows.

Preferably, the first anti-backing structure comprises a plurality of first annular barbs, the first annular barbs are axially spaced, and the second anti-backing structure comprises a plurality of second annular barbs. The second annular barbs are axially spaced apart.

Preferably, the first side hole extends in a direction of a proximal end of the first extrusion member toward the proximal end of the first extrusion member, and the second side hole surrounds the second extrusion member. The axis extends in the direction of the distal end of the second extrusion member and has an oblique hole shape, wherein the first and second side holes extend in different directions.

Preferably, the first side hole has an elongated hole shape and extends in a direction parallel to an axis of the first extrusion member, and the second side hole has an elongated hole shape and extends in a direction parallel to an axis of the second extrusion member.

Preferably, the first extrusion member forms a plurality of first side holes, the first side holes are axially arranged in at least one row and have a circular hole shape, and the second extrusion member forms a plurality of second side holes. The second side holes are axially arranged in at least one row and have a circular hole shape.

The utility model has the advantages that the anti-backup unit can prevent the unfolding structure from being slightly contracted or completely returned to the contracted state when subjected to an external force in the unfolded state, so that the covering unit is filled before or during the filling of the medical filler or completely perfused. However, before it is completely solidified, it is maintained in a state in which the expanded structure is stretched, and the bone fixing device of the present invention is maintained to expand the bone.

10‧‧‧Extrusion unit

11‧‧‧First extrusion

111‧‧‧ distal

113‧‧‧ proximal end

115‧‧‧First shaft hole

117, 117', 117" ‧ ‧ first side hole

13‧‧‧Second extrusion

131‧‧‧Second shaft hole

1311‧‧‧Small path

1313‧‧‧Multi-angle hole

1315‧‧‧Threaded section

132, 132’, 132”‧‧‧ second side hole

133‧‧‧ sleeve

1331‧‧‧Small path

1333‧‧‧Sawtooth segment

1335‧‧‧ Large diameter section

1337‧‧‧Sleeve shaft hole

134‧‧‧Fixed ring

135‧‧‧ rod body

1351‧‧‧Small path

1353‧‧‧ Large diameter section

20, 20', 20", 20''', 20''''‧‧‧

21, 21’‧‧‧ distal

22, 22’‧‧‧ proximal end

23, 23’, 23” ‧ ‧ gap

24, 24', 24" ‧ ‧ tablets

25’, 25”‧‧‧ slots

26''', 26''''‧‧‧ strips

30‧‧‧Wrap unit

31‧‧‧ distal

33‧‧‧ Near end

40‧‧‧Repellent unit

41, 41', 41" ‧ ‧ first anti-back structure

411’‧‧‧First block barb

411"‧‧‧First ring barb

43, 43’, 43” ‧ ‧ second anti-back structure

431’‧‧‧Second block barb

431”‧‧‧Second ring barb

50‧‧‧ buckle

60‧‧‧Assist in the expansion of the unit

61‧‧‧Shell

611‧‧‧ distal

613‧‧‧ proximal end

62‧‧‧Operation parts

63‧‧‧ casing

631‧‧‧ distal

633‧‧‧ proximal end

635‧‧‧through hole

64‧‧‧Auxiliary tube

641‧‧‧ distal

645‧‧‧ jack

65‧‧‧ catheter

651‧‧‧ distal

653‧‧‧ proximal end

70‧‧‧Injection unit

71‧‧‧Ontology

72‧‧‧Pushing parts

73‧‧‧ Extension tube

100‧‧‧ vertebrae

200‧‧‧ medical filler

Figure 1a is a perspective view of a first embodiment of a bone fixation device of the present invention.

Figure 1b is an exploded view of a first embodiment of the bone fixation device of the present invention.

Figure 1c is a cross-sectional view showing a first embodiment of the bone fixation device of the present invention.

Fig. 1d is a schematic view showing the unfolded state of the first four-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention.

Fig. 1e is a cross-sectional view showing the unfolded state of the first four-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention.

Fig. 2a is a schematic view showing the contracted state of the second four-piece lantern-like unfolding structure of the first embodiment of the bone fixation device of the present invention.

Fig. 2b is a schematic view showing the unfolded state of the second four-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention.

Fig. 2c is a schematic view showing the contracted state of the two-piece lantern-like unfolding structure of the first embodiment of the bone fixation device of the present invention.

Fig. 2d is a schematic view showing the unfolded state of the two-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention.

Fig. 2e is a schematic view showing a contracted state of the strip-shaped unfolding structure of the first embodiment of the bone fixation device of the present invention.

Fig. 2f is a schematic view showing the unfolded state of the strip-shaped unfolding structure of the first embodiment of the bone fixation device of the present invention.

Fig. 2g is a schematic view showing the unfolded state of the hoist-type strip-like unfolding structure of the first embodiment of the bone fixation device of the present invention.

Figure 3a is a schematic illustration of a first embodiment of the bone fixation device of the present invention further including an assist deployment unit.

Fig. 3b is a schematic view showing the first embodiment of the bone fixation device of the present invention placed on a vertebra.

Fig. 3c is a schematic view showing the development of the control deployment structure of the first embodiment of the bone fixation device of the present invention.

Figure 3d is a schematic illustration of a first embodiment of a bone fixation device of the present invention infused with a medical filler.

3e is a schematic view showing the first embodiment of the bone fixation device of the present invention in which the extrusion unit, the deployment structure, the coating unit, and the anti-retraction unit are retained in the vertebra after the medical filler is filled.

Figure 4a is a cross-sectional view showing a second embodiment of the bone fixation device of the present invention.

Figure 4b is a cross-sectional view showing a third embodiment of the bone fixation device of the present invention.

Figure 4c is a side elevational view of a third embodiment of the bone fixation device of the present invention.

Figure 5a is a perspective view of a fourth embodiment of the bone fixation device of the present invention.

Figure 5b is a cross-sectional view showing a fourth embodiment of the bone fixation device of the present invention.

Fig. 5c is a schematic view showing the assisting deployment unit of the fourth embodiment of the bone fixation device of the present invention in combination with the second extrusion member.

Figure 5d is a schematic view of the assisting deployment unit of the fourth embodiment of the bone fixation device of the present invention for pushing the second extrusion member in a straight forward manner.

Figure 5e is an exploded view of a fifth embodiment of the bone fixation device of the present invention.

Figure 5f is an exploded view of a sixth embodiment of the bone fixation device of the present invention.

The embodiments of the present invention will be described in more detail below with reference to the drawings and the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

1a to 1c, FIG. 1a is a perspective view of a first embodiment of a bone fixation device of the present invention, FIG. 1b is an exploded view of a first embodiment of the bone fixation device of the present invention, and FIG. 1c is a bone of the present invention A cross-sectional view of a first embodiment of a fixture. The present invention provides a bone fixation device comprising an extrusion unit 10, a deployment structure 20, a cladding unit 30, and a retraction unit 40.

The pressing unit 10 includes a first pressing member 11 and a second pressing member 13. The first extrusion member 11 has a distal end 111 and a proximal end 113, and defines a first shaft hole 115 and at least a first side hole 117. The first shaft hole 115 extends through the proximal end 113 of the first extrusion member 11. The first side hole 117 is in communication with the first shaft hole 115. Preferably, the first extrusion member 11 has a cylindrical shape. The first side hole 117 has a long hole shape and extends in a direction parallel to the axis of the first extrusion member 11. The second extrusion member 13 is movably disposed on the first extrusion member 11 and has a distal end and a proximal end, and defines a second shaft hole 131 and at least a second side hole 132. The second shaft hole 131 penetrates the distal end and the proximal end of the second extrusion member 13 and communicates with the first shaft hole 115 and the second side hole 132. More specifically, the second extrusion member 13 includes a sleeve 133, a fixing ring 134 and a rod 135. The sleeve 133 includes a small diameter section 1331, a sawtooth section 1333 and a large diameter section 1335 and forms a A sleeve shaft hole 1337 extends through the two ends thereof. The retaining ring 134 is disposed on the serration section 1333 of the sleeve 133. The rod body 135 includes a small diameter section 1351 and a large diameter section 1353. The small diameter section 1351 of the rod body 135 has a distal end and a proximal end. The large diameter section 1353 of the rod body 135 has a distal end and a proximal end. The proximal end of the small diameter section 1351 of the rod body 135 is coupled to the distal end of the large diameter section 1353 of the rod body 135. The outer diameter of the small diameter section 1351 of the rod body 135 is smaller than the diameter of the sleeve shaft hole 1337, and the diameter of the rod body 135 is large. The outer diameter of the diameter section 1353 is equal to the outer diameter of the large diameter section 1335 of the sleeve 133, and the small diameter section 1351 of the rod body 135 sequentially passes through the sleeve shaft hole 1337 and the first shaft hole 115, and the large diameter section of the rod body 135 The distal end of the 1353 abuts against the large diameter section 1335 of the sleeve 133, so that the distal end of the small diameter section 1351 of the rod body 135 is defined as the distal end of the second extrusion member 13, and the large diameter section 1353 of the rod body 135 The proximal end is defined as the proximal end of the second extrusion member 13, and the rod body 135 forms a second shaft hole 131. The second shaft hole 131 penetrates the distal end of the small diameter section 1351 of the rod body 135 and the large diameter section of the rod body 135. At the proximal end of 1353, the small diameter section 1351 of the rod body 135 forms a second side hole 132 having a long hole shape and extending in a direction parallel to the axis of the second extrusion member 13. The second shaft hole 131 includes a small diameter section 1311, a polygonal hole section 1313 and a threaded section 1315. The small diameter section 1311 of the second shaft hole 131 penetrates the small diameter section 1351 of the rod body 135, and the polygonal hole section 1313 Located at a proximal end of the large diameter section 1353 of the rod body 135 and extending through the large diameter section 1353 of the rod body 135, the threaded section 1315 of the second shaft hole 131 is located in the large diameter section 1353 of the rod body 135 and communicates with the second shaft hole. Between the small diameter section 1311 of the 131 and the polygonal aperture section 1313, as shown in Fig. 1c. Preferably, the polygonal hole segment 1313 of the second shaft hole 131 has a hexagonal hole shape as shown in FIGS. 1a and 1b.

The deployment structure 20 has a distal end 21 and a proximal end 22 and defines a plurality of voids 23. The distal end 21 and the proximal end 22 of the deployment structure 20 are respectively disposed on the first and second extrusion members 11, 13. More specifically, the distal end 21 of the deployment structure 20 is fixed to the outer wall surface of the first extrusion member 11 near the distal end 111 of the first extrusion member 11, and the proximal end 22 of the deployment structure 20 is fixed to the second extrusion member 13. The small diameter section 1331 of the sleeve 133. The fixing means for fixing the distal end 21 and the proximal end 22 of the unfolding structure 20 to the first and second pressing members 11 and 13 are conventionally known, and thus will not be described herein. Referring to FIG. 1a, the unfolding structure 20 includes four sheets 24, and when the unfolding structure 20 is contracted, an elongated gap 23 is formed between each of the two sheets 24, and each sheet 24 is formed. The portion near the distal end 21 and the proximal end 22 of the deployment structure 20 is slightly outwardly bent. Referring to FIG. 1d and FIG. 1e, FIG. 1d is a schematic view showing the unfolded state of the first four-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention, and FIG. 1e is the first embodiment of the bone fixation device of the present invention. A cross-sectional view of an unfolded state of a first four-piece lantern-like deployment of an embodiment. When the unfolding structure 20 is unfolded, the sheets 24 are outwardly bent and unfolded, and each of the sheets 24 has two bends, so that the appearance of the unfolded structure 20 after being unfolded is a lantern shape, so it is called the first A four-piece lantern-like expansion structure. Wherein, when the second pressing member 13 moves in the direction of the distal end 111 of the first pressing member 11, the unfolding structure 20 is pressed by the first and second pressing members 11, 13 to expand outward to an unfolded state. The first side hole 117 is aligned with the second side hole 132, so that the first and second side holes 115, 131 communicate with the gap 23 of the unfolding structure 20 through the first and second side holes 117, 132, as shown in FIG. 1d. Figure 1e shows. When the second extrusion member 13 moves toward the proximal end 113 of the first extrusion member 11, the unfolding structure 20 is released by the first and second extrusion members 11, 13 and is contracted inwardly to a contracted state, as shown in the figure. 1a and Figure 1c.

Referring to FIG. 2a, FIG. 2a is a schematic view showing a contracted state of a second four-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention. The second four-piece lantern-like deployment structure differs from the first four-piece lantern-like deployment structure in that, when the unfolded structure 20' is in the contracted state, the sheets 24' are smooth from beginning to end without any bend. The gap 23' between each two sheets 24' is slit-shaped, and two slots 25' are formed in each of the gaps 23', and the width of each slot 25' is larger than the corresponding gap. 23' width. The two slots 25' just divide the corresponding gap 23' into three paragraphs. Referring to FIG. 2b, FIG. 2b is a schematic view showing the unfolded state of the second four-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention. When the unfolding structure 20' is unfolded, the sheets 24' are bent at a location closer to the slot 25' of the distal end 21' of the deployed structure 20', rendering the appearance of the second four-piece lantern-like expanded structure A lantern resembling the first four-piece lantern-like structure. Referring to FIG. 2c, FIG. 2c is a schematic view showing a contracted state of the two-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention. The unfolded structure 20" includes two sheets 24", each gap 23" Forming a slot 25", the width of the slot 25" is greater than the width of the corresponding slot 23". The position of the slot 25" is approximately located three-thirds of the distal end of the two slots 23" near the deployed structure 20" one place. Referring to FIG. 2d, FIG. 2d is a schematic view showing the unfolded state of the two-piece lantern-like deployment structure of the first embodiment of the bone fixation device of the present invention. When the unfolding structure 20" is unfolded, the two-piece body 24" is bent at the two-slot hole 25", so that the appearance of the unfolded structure 20" after deployment is a lantern shape, so it is called a two-piece lantern-like expansion structure. . Referring to FIG. 2e, FIG. 2e is a schematic view showing a contracted state of the strip-shaped unfolding structure of the first embodiment of the bone fixation device of the present invention. The unfolded structure 20"' includes four strips 26"'. Referring to FIG. 2f, FIG. 2f is a schematic view showing the unfolded state of the strip-shaped unfolding structure of the first embodiment of the bone fixation device of the present invention. When the unfolding structure 20"' is unfolded, the strips 26"' are bent outwardly in an arc shape. Referring to FIG. 2g, FIG. 2g is a schematic view showing the unfolded state of the hoist-type strip-shaped unfolding structure of the first embodiment of the bone fixation device of the present invention. The four strips 26"" of the unfolded structure 20"" are made of a memory metal, so that the expanded structure 20"" shrinks when struck, and the strip of Fig. 2e expands. The structure 20''' is the same. When the unfolding structure 20"" is unfolded, the strips 26"" will be bent into a gourd shape, so it is called a gourd strip-like unfolding structure. In short, the shape of the unfolded structure is not limited to those disclosed in the specification and drawings of the present invention, and the unfolded structure of any shape is included in the scope of the present invention as long as it can be expanded and contracted.

The covering unit 30 has a distal end 31 and a proximal end 33. The distal end 31 and the proximal end 33 of the covering unit 30 are respectively disposed on the first and second pressing members 11 and 13 and the covering unit 30 is unfolded. Structure 20. The distal end 31 of the covering unit 30 is fixed to the outer wall surface of the distal end 111 of the first extrusion member 11 by a buckle 50. For details, please refer to the Republic of China Patent Publication No. 1321467, which is not described herein. The proximal end 33 of the covering unit 30 is fixed to the sawtooth section 1333 of the sleeve 133 by the fixing ring 134. For details, please refer to the Republic of China Patent Publication No. 1419672, which is not described herein. However, the means for fixing the distal end 31 and the proximal end 33 of the covering unit 30 to the first and second pressing members 11 and 13 is not limited thereto, and any of the distal end 31 and the proximal end of the covering unit 30 can be 33 means fixed to the first and second extrusion members 11, 13 It is intended to be included in the scope of the present invention. The covering unit 30 can be any conventional covering unit. For details, please refer to paragraph [0034] of the manual of the Republic of China Patent Publication No. 201536248, which will not be repeated here. For the material of the wrapping unit 30, please refer to paragraphs [0035] to [0037] on page 6-7 of the specification of the Republic of China Patent Publication No. 201536248, which will not be repeated here. Wherein, when the unfolding structure 20 is deployed to the unfolded state, the covering unit 30 is expanded by the unfolding structure 20, as shown in FIG. 1e. When the covering unit 30 is opened, it may have any conventional shape such as a cylindrical shape, a conical shape, a spherical shape, a ball-like shape, a gourd shape, a square shape, or a square shape.

The anti-backup unit 40 is disposed in the pressing unit 10, wherein when the unfolding structure 20 is deployed to the unfolded state, the first pressing member 11 selectively restricts the second pressing member 13 by the anti-backing unit 40, so that the second pressing member The piece 13 cannot move linearly in the direction of the proximal end 113 of the first extrusion 11 to maintain the deployed structure 20 in the deployed state. Preferably, the anti-backup unit 40 includes a first anti-back structure 41 and a second anti-back structure 43. The first anti-backup structure 41 is disposed on the first extrusion member 11 , and the second anti-backup structure 43 is disposed on the second extrusion member 13 . Wherein, when the unfolding structure 20 is deployed to the unfolded state, the first pressing member 11 selectively restricts the second anti-retracting structure 43 by the first anti-retracting structure 41 to selectively restrict the second pressing member 13, The second extrusion member 13 is prevented from moving linearly in the direction of the proximal end 113 of the first extrusion member 11, so that the unfolded structure 20 is maintained in the unfolded state. Preferably, the first anti-backup structure 41 is disposed on the inner wall surface of the first shaft hole 115 and is internally threaded, and the second anti-backup structure 43 is disposed outside the small diameter section 1351 of the rod body 135 of the second extrusion member 13. The wall surface is externally threaded, whereby the small diameter section 1351 of the rod body 135 of the second extrusion member 13 is screwed to the first shaft hole 115.

In other embodiments, the first anti-backup structure 41 can also be disposed on the outer wall surface of the first extrusion member 11 and be externally threaded, and the second anti-retraction structure 43 can also be disposed on the second axis of the second extrusion member 13. The inner wall surface of the small diameter section 1311 of the hole 131 is internally threaded, whereby the first extrusion member 11 is screwed to the small diameter section 1311 of the second shaft hole 131.

Please refer to FIG. 3a. FIG. 3a is a schematic view of the first embodiment of the bone fixation device of the present invention further including an assisting deployment unit. The bone fixation device of the present invention further includes an assist deployment unit 60. The assist deployment unit 60 includes a housing 61, an operating member 62, a sleeve 63, an auxiliary tube 64, and a conduit 65. The housing 61 has a distal end 611 and a proximal end 613. The operating member 62 is disposed at the proximal end 613 of the housing 61. The sleeve 63 has a distal end 631 and a proximal end 633 and defines a through hole 635 extending through the distal end 631 and the proximal end 633. The auxiliary tube 64 is movably disposed in the housing 61, has a distal end 641 and a proximal end, and defines a receptacle 645 extending through the distal end 641 and the proximal end. The proximal end of the auxiliary tube 64 is provided to the operating member 62. A portion of the auxiliary tube 64 exposed to the housing 61 is bored through the through hole 635 of the sleeve 63. The distal end 641 of the auxiliary tube 64 protrudes from the distal end 631 of the sleeve 63 and is polygonal, and is embedded in the polygonal hole section 1313 of the second shaft hole 131. The conduit 65 is disposed in the receptacle 645 of the auxiliary tube 64 and has a distal end 651 and a proximal end 653. The distal end 651 of the catheter 65 projects from the distal end 641 of the auxiliary tube 64 and is threaded onto the threaded section 1315 of the second shaft bore 131. Preferably, the proximal end 653 of the catheter 65 is coupled to the auxiliary tube 64 in a threaded manner.

Referring to FIG. 3d, FIG. 3d is a schematic view of the first embodiment of the bone fixation device of the present invention. The bone fixation device of the present invention further includes an injection unit 70. The injection unit 70 includes a body 71, a pusher 72, an extension tube 73, the sleeve 63 and the conduit 65. The body 71 has a distal end and a proximal end, and is internally provided with a medical filler 200. The medical filler may be any conventional medical filler. For details, please refer to paragraph [0041] on page 7-8 of the specification of the Republic of China Patent Publication No. 201536248, which is not described herein. The pushing member 72 is disposed at the proximal end of the body 71. The extension tube 73 has a distal end and a proximal end and forms a first-class track. The proximal end of the extension tube 73 is disposed at the distal end of the body 71, and the flow path of the extension tube 73 communicates with the interior of the body 71. Wherein, the sleeve 63 of the injection unit 70 is the same member as the sleeve 63 of the assist deployment unit, and the conduit 65 of the injection unit 70 is the same member as the conduit 65 of the assist deployment unit, with the difference that the proximal end of the catheter 65 protrudes from The proximal end of the sleeve 63 is disposed at the distal end of the extension tube 73, and the inside of the conduit 65 communicates with the flow path of the extension tube 73. Preferably, the proximal end of the catheter 65 is coupled to the distal end of the extension tube 73 in a threaded manner.

The manner in which the first embodiment of the bone fixation device of the present invention is applied to the vertebra will be described below. Please refer to FIG. 3b to FIG. 3e. FIG. 3b is a schematic view showing the first embodiment of the bone fixation device of the present invention placed on the vertebra, and FIG. 3c is a schematic view showing the deployment of the control deployment structure of the first embodiment of the bone fixation device of the present invention. 3d is a schematic view of the first embodiment of the bone fixation device of the present invention, and FIG. 3e is a first embodiment of the bone fixation device of the present invention, after the medical filler is filled, the extrusion unit, the unfolding structure, and the package A schematic diagram of the covering unit and the anti-retraction unit being placed in the vertebrae. First, a combination of the extrusion unit 10, the deployment structure 20, the cladding unit 30, and the anti-retraction unit 40 is placed in the vertebra 100 by the assist deployment unit 60, as shown in Fig. 3b. Referring to FIG. 3c, the operating member 62 of the assisting deployment unit 60 is rotated to drive the auxiliary tube 64 of the assisting deployment unit 60 and the conduit 65 to rotate together, and the conduit 65 drives the second extrusion member 13 to rotate relative to the first extrusion member 11. The second extrusion member 13 is moved to the first anti-retraction structure 41 by the second anti-retraction structure 43 to move toward the distal end 111 of the first extrusion member 11 . During the movement of the second extrusion 13 toward the distal end 111 of the first extrusion 11, since the first extrusion 11 has been positioned at the deepest point of the vertebra 100, the second extrusion 13 can cooperate with the first extrusion 13 An extrusion member 11 is extruded together with the unfolding structure 20 to the unfolded state, and the covering unit 30 is expanded by the unfolding structure 20. The second side hole 132 of the small diameter section 1351 of the rod body 135 is aligned with the first side hole 117 of the first extrusion member 11 so that the first side hole 117 communicates with the second side hole 132 and the gap 23 of the unfolding structure 20 between. Further, the housing 61, the operating member 62, and the auxiliary tube 64 of the assisting unit 60 are removed, and the sleeve 63 and the duct 65 are retained. The proximal end of the catheter 65 is screwed to the distal end of the extension tube 73. The medical filler 200 inside the body 71 is extruded by the pushing member 72, and sequentially passes through the extension tube 73 of the injection unit 70, the conduit 65, the second shaft hole 131 of the second extrusion member 13, and the second extrusion. The second side hole 132 of the piece 13 and the first side hole 117 of the first extrusion 11 finally pass through the gap 23 of the unfolding structure 20 and then gradually fill the range covered by the cladding unit 30. After the medical filler 200 is solidified, the injection unit 70 is removed, whereby the combination of the extrusion unit 10, the unfolding structure 20, the covering unit 30, and the anti-backup unit 40 of the bone fixation device of the present invention can effectively support Vertebra 100, as shown in Figure 3e.

Wherein, in the process of use, since the anti-backup unit 40 is of a thread type (the first anti-backup structure 41 is an internal thread and the second anti-backup structure 43 is an external thread, or the first anti-backup structure 41 is an external thread and the second The anti-backing structure 43 is an internal thread), and the first and second pressing members 11 and 13 can control the unfolding and contracting of the unfolding structure 20 in a spiral manner, whereby the unfolding structure 20 is contracted from the unfolded state to the contracted state. When the degree of deployment of the unfolding structure 20 is adjusted, the second extrusion member 13 can be screwed to the first anti-backup structure 41 by the second anti-backup structure 43 by assisting the expansion unit 60 to rotate the second extrusion member 13. While rotating in the direction of the proximal end 113 of the first extrusion member 11, the purpose of adjusting the degree of deployment of the deployment structure 20 is achieved, so that the deployment structure 20 can be smoothly deployed and contracted in the vertebra to ream the hole to adjust The direction of the reaming or the size of the reaming range.

Furthermore, during the unfolding of the unfolding structure 20, part of the cancellous bone fragments are crushed, and the covering unit 30 can effectively prevent the crushed cancellous bone fragments from falling into the pressing unit 10 and the unfolding structure 20. Thereby, the unfolding structure 20 can be smoothly deployed and contracted in the vertebra 100 to perform reaming to adjust the direction of the reaming or the size of the reaming range.

In addition, the covering unit 30 can effectively control the range of perfusion of the medical filler 200 to prevent the medical filler 200 from smashing in the bone.

Additionally, a small or portion of the medical filler 200 will ooze out of the pores of the cladding unit 30 to integrate with the trabecular bone.

Most importantly, the anti-backup unit 40 is threaded before the medical filler 200 is filled, during the filling process, or before it is completely filled but not yet fully solidified (the first anti-backup structure 41 is internally threaded and the second anti-retraction The structure 43 is externally threaded, or the first anti-backup structure 41 is externally threaded and the second anti-backup structure 43 is an internal thread), and the first and second extruding members 11 and 13 can be used to control the unfolding structure 20 in a spiral manner. And shrinkage. According to this, when the unfolding structure 20 is pressed by the external force in the unfolded state and the first and second pressing members 11 and 13 are pressed inward, the first pressing member 11 restrains the second defense by the first anti-backing structure 41. Retracting the structure 43 to restrict the second extrusion member 13 so that the second extrusion member 13 cannot pass the first extrusion member 11 The direction of the proximal end 113 moves linearly, so that the unfolding structure 20 is maintained in the unfolded state, and the effect of preventing the unfolding structure 20 from being slightly contracted or completely retracted to the contracted state is achieved. The unfolding structure 20 can open the wrapping device 40 from beginning to end to make the covering The unit 30 remains in the expanded state of the deployed structure 20 before, during, or after the filling of the medical filler 200, but does not fully solidify, maintaining the extrusion unit 10 of the bone fixation device of the present invention. The combination of the structure 20, the wrapping unit 30, and the anti-retraction unit 40 supports the effect of the vertebra 100 and can be maintained until the medical filler 200 is completely solidified. Once the medical filler 200 is solidified, the unfolded structure 20 is completely secured by the solidified medical filler 200 without any possibility of contraction to achieve the effect of propping up the vertebra 100.

Referring to Figure 4a, Figure 4a is a cross-sectional view of a second embodiment of the bone fixation device of the present invention. The second embodiment of the present invention is substantially the same as the structure and the manner of use of the first embodiment described above, except that the first extrusion member 11 forms a plurality of first side holes 117', and the first side holes 117' are axially Arranged in at least one row and in the shape of a circular hole, the second extrusion member 13 forms a plurality of second side holes 132' which are axially arranged in at least one row and have a circular hole shape.

Referring to Figures 4b and 4c, Figure 4b is a cross-sectional view of a third embodiment of the bone fixation device of the present invention, and Figure 4c is a side elevational view of a third embodiment of the bone fixation device of the present invention. The third embodiment of the present invention is substantially the same as the structure and the use mode of the first embodiment described above, except that the first extrusion member 11 forms two first side holes 117", and the two first side holes 117" surround the first embodiment. An axis of the extrusion member 11 extends in the direction of the proximal end 113 of the first extrusion member 11 to have an oblique hole shape, and the second extrusion member 13 forms two second side holes 132", and the second second side holes 132 The axis surrounding the second extrusion member 13 extends in the direction of the distal end of the second extrusion member 13 to have a slanted hole shape. The extending directions of the first and second side holes 117" and 132" are different. In this embodiment, the two first side holes 117" are located on the same side of the first extrusion member 11 and are arranged in a row. The two second side holes 132" are located on the same side of the second extrusion member 13 and are arranged in a row. row. In other embodiments, the distance between the two first side holes 117" can be larger or smaller than the distance shown in FIG. 4b and FIG. 4c, and the distance between the two second side holes 132" can be compared with FIG. 4b and FIG. 4c. Displayed distance Be larger or smaller. In other embodiments, the first extrusion member 11 may also form only a single first side hole 117" having a slanted hole shape, and the second extrusion member 13 may also form only a single second side having a slanted hole shape. Hole 132". In other embodiments, the first extrusion member 11 may also form two or more first side holes 117" having an oblique hole shape, and the second extrusion member 13 may also form two or more oblique holes. The two side holes 132", and the first side holes 117" and the second side holes 132" are arbitrarily arranged. An advantage of such an embodiment is that regardless of how the first and second extrusions 11, 13 rotate, the first and second side holes 117", 132", which are staggered in the direction of extension, are capable of maintaining at least a portion of each other in alignment to enable medical treatment. The filler 200 passes through the first and second side holes 117", 132".

Referring to Figures 5a and 5b, Figure 5a is a perspective view of a fourth embodiment of the bone fixation device of the present invention, and Figure 5b is a cross-sectional view of a fourth embodiment of the bone fixation device of the present invention. The fourth embodiment of the present invention is substantially the same as the structure of the first embodiment described above, except that the first anti-backup structure 41' is not an internal thread but includes a plurality of first block barbs 411', the first block The barbs 411' are axially arranged in a row, and the second anti-backup structure 43' is not an external thread but includes a plurality of second block barbs 431', which are axially arranged in a row. . Please refer to FIG. 5c and FIG. 5d. FIG. 5c is a schematic view of the assisting deployment unit of the fourth embodiment of the bone fixation device of the present invention combined with the second extrusion member, and FIG. 5d is a fourth embodiment of the bone fixation device of the present invention. A schematic diagram of assisting the unfolding unit to push the second extrusion in a straight forward manner. In use, the fourth embodiment of the present invention differs from the foregoing first embodiment in that the anti-backup unit of the fourth embodiment is a single-row block barb type, that is, presents a second row of the second row. The plurality of second block barbs 431' of the anti-back structure 43' and the plurality of first block barbs 411' of the first anti-backup structure 41' arranged in a single row are structurally similar to ratchets, so the fourth implementation For example, the second block bar 431' can be engaged or misaligned with the first block barbs 411' by rotating the second extrusion member 13. When the first and second block barbs 411', 431' are engaged, the operating member 62 of the assisting deployment unit 60 is pushed to drive the auxiliary pipe 64 and the conduit 65 of the assisting deployment unit 60 together to the first extrusion member. The direction of the distal end 111 of the 11 is advanced, and the conduit 65 pushes the second extrusion The pressing member 13 linearly moves unidirectionally in the direction of the distal end 111 of the first extrusion member 11. To contract the unfolded structure 20 of the fourth embodiment from the unfolded state to the contracted state to adjust the degree of deployment of the unfolding structure 20, the second extruding member 13 can be rotated by assisting the unfolding unit 60 to The barbs 431' are offset from the first block barbs 411' away from the first block barbs 411', whereby the second extrusion 13 can be directly adjacent to the first extrusion 11 The direction of the end 113 moves linearly to achieve the purpose of adjusting the degree of deployment of the deployment structure 20, so that the deployment structure 20 can be smoothly deployed in the vertebrae for reaming. When the unfolding structure 20 is pressed inwardly by the external force and the first and second pressing members 11 and 13 are pressed inward, the first block barbs 411' hook the second block barbs 431' The effect of preventing the unfolded structure 20 from contracting slightly or completely returning to the contracted state is achieved.

Please refer to FIG. 5e, which is an exploded view of a fifth embodiment of the bone fixation device of the present invention. The fifth embodiment of the present invention is substantially the same as the structure and the use mode of the foregoing fourth embodiment, except that the first block barbs 411' are axially arranged in two rows, and the second block barbs. The 431' is also arranged axially in two rows. An advantage of this embodiment is that, compared with the fourth embodiment, the two rows of the first block barbs 411' are stronger in strength against external forces when hooking the second row of second block barbs 431', and are more resistant to unfolding. The structure 20 contracts slightly when the deployed state is affected by an external force, and even completely returns to the contracted state.

Please refer to FIG. 5f, which is an exploded view of a sixth embodiment of the bone fixation device of the present invention. The sixth embodiment of the present invention is substantially the same as the structure and the use mode of the foregoing fourth embodiment, with the difference that the first anti-backup structure 41" includes a plurality of first annular barbs 411", and the first annular barbs 411" are axially spaced apart, and the second anti-backup structure 43" includes a plurality of second annular barbs 431" that are axially spaced apart. An advantage of this embodiment is that the first and second extrusion members 11, 13 can be restricted from unidirectionally controlling the deployment of the deployment structure 20 to prevent the deployment structure 20 from contracting slightly or completely returning to the contracted state when the deployed state is affected by an external force. .

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, so that any modifications or alterations to the present invention made in the same spirit of creation are made. All should still be included in the scope of the intention of the present invention.

10‧‧‧Extrusion unit

11‧‧‧First extrusion

13‧‧‧Second extrusion

20‧‧‧Unfolding the structure

30‧‧‧Wrap unit

100‧‧‧ vertebrae

200‧‧‧ medical filler

Claims (22)

A bone fixation device, disposed in a vertebra, comprising: an extrusion unit comprising a first extrusion member and a second extrusion member, the first extrusion member having a distal end and a proximal end, and forming a first shaft hole and at least one first side hole, the first shaft hole penetrating a proximal end of the first extrusion member, the first side hole is in communication with the first shaft hole, and the second extrusion member is movable a first shaft hole disposed in the first extrusion member, having a distal end and a proximal end, and forming a second shaft hole and at least a second side hole, the second shaft hole penetrating the second extrusion a distal end and a proximal end of the member are in communication with the first shaft hole and the second side hole, wherein the second pressing member comprises a sleeve, a fixing ring and a rod, the sleeve comprises a small diameter a sleeve, a sawtooth section and a large diameter section and forming a sleeve shaft hole extending through the two ends thereof, the fixing ring being disposed on the sawtooth section of the sleeve, the rod body comprising a small diameter section and a large diameter section, the rod The small diameter section of the body has a distal end and a proximal end, the large diameter section of the rod body has a distal end and a proximal end, and the proximal end of the small diameter section of the rod body is coupled to the large diameter section of the rod body a distal end, the small diameter section of the rod passes through the sleeve shaft hole and forms the second side hole, and the outer diameter of the large diameter section of the rod body is equal to the outer diameter of the large diameter section of the sleeve, so that the rod The distal end of the large diameter section of the body abuts against the large diameter section of the sleeve, the rod body forms the second shaft hole, the second shaft hole penetrates the distal end of the small diameter section of the rod body and the rod body a proximal end of the large diameter section; an unfolded structure having a distal end and a proximal end and forming a plurality of voids, wherein the distal end and the proximal end of the expanded structure are respectively disposed on the first and second extrusion members, and the expanded structure The proximal end is disposed on the small diameter section of the sleeve, wherein the unfolding structure is when the second extrusion member moves toward the distal end of the first extrusion member Pressed by the first and second pressing members to expand outward to an unfolded state to open a space in the interior of the vertebra at least in the direction of the spine, the first side hole being aligned with the second side hole, so that The first and second shaft holes communicate with the gap of the unfolding structure by the first and second side holes; a covering unit having a distal end and a proximal end, the distal end and the proximal end of the covering unit Provided in the first and second pressing members respectively, and the covering unit covers the unfolding structure, the fixing ring fixing the proximal end of the covering unit, wherein when the unfolding structure is deployed to the unfolded state, the bag is The covering unit is expanded by the unfolding structure; and a anti-backing unit includes a first anti-backing structure and a second anti-retracting structure, the first anti-retracting structure is disposed on the first axial hole of the first pressing member The inner wall surface, the second anti-retraction structure is disposed on an outer wall surface of the small diameter section of the rod body of the second extrusion member, wherein the first extrusion member is by the first portion when the unfolding structure is deployed to the unfolded state An anti-backup structure selectively restricting the second anti-backup structure to selectively restrict the second extrusion member Two pressing members can not move linearly toward the proximal end of the first pressing member, enabling the deployable structure in the deployed state. The bone fixation device of claim 1, wherein the first anti-backup structure is an internal thread, and the second anti-backup structure is an external thread. The bone fixation device of claim 1, wherein the second shaft hole comprises a small diameter section, a polygonal hole section and a threaded section, and the small diameter section of the second shaft hole penetrates the rod body a small diameter section of the large diameter section of the rod body and extending through a proximal end of the large diameter section of the rod body, the threaded section of the second shaft hole being located in the large diameter section of the rod body and communicating And between the small diameter section of the second shaft hole and the polygonal hole section. The bone fixation device of claim 3, further comprising an assist deployment unit, the assist deployment unit comprising: a housing having a distal end and a proximal end; and an operating member disposed on the housing a proximal end; an auxiliary tube movably disposed in the housing, having a distal end and a proximal end, and forming a through hole extending through the distal end and the proximal end, the proximal end of the auxiliary tube being disposed on the operating member, The distal end of the auxiliary tube is polygonal and embedded in the polygonal hole section of the second shaft hole; and a catheter is disposed at the insertion hole of the auxiliary tube and has a distal end and a proximal end, the distal end of the catheter Projecting at a distal end of the auxiliary tube and screwed to a threaded section of the second shaft hole. The bone fixation device of claim 4, wherein the assist deployment unit further comprises a sleeve having a distal end and a proximal end and forming a through hole extending through the distal end and the proximal end The portion of the auxiliary tube exposed to the housing penetrates the through hole of the sleeve, and the distal end of the auxiliary tube protrudes from the distal end of the sleeve. The bone fixation device of claim 3, further comprising an injection unit, the injection unit comprising: a body having a distal end and a proximal end, and having a medical filler inside; a pushing member Provided at a proximal end of the body; an extension tube having a distal end and a proximal end, and forming a first-class channel, the proximal end of the extension tube is disposed at a distal end of the body, the flow channel of the extension tube and the body Internally connected; a sleeve having a distal end and a proximal end and defining a through hole extending through the distal end and the proximal end; a catheter having a distal end and a proximal end, the catheter is disposed in the through hole of the sleeve, the distal end of the catheter protrudes from the distal end of the sleeve, and is screwed to the threaded section of the second shaft hole The proximal end of the catheter protrudes from the proximal end of the sleeve and is disposed at a distal end of the extension tube, and the inside of the catheter communicates with the flow path of the extension tube. The bone fixation device of claim 1, wherein the first anti-retraction structure comprises a plurality of first block barbs, and the first block barbs are axially arranged in a row or a plurality of rows, The second anti-backup structure includes a plurality of second block barbs, and the second block barbs are axially arranged in a row or a plurality of rows. The bone fixation device of claim 1, wherein the first anti-backup structure comprises a plurality of first annular barbs, the first annular barbs are axially spaced, the second anti-backing The structure includes a plurality of second annular barbs that are axially spaced apart. The bone fixation device of claim 1, wherein the first side hole extends in a direction of a proximal end of the first extrusion member toward the proximal end of the first extrusion member to have a slanted hole shape. The second side hole extends in a direction of the distal end of the second extrusion member in the direction of the distal end of the second extrusion member to have an oblique hole shape, wherein the first and second side holes extend in different directions. The bone fixation device of claim 1, wherein the first side hole has a long hole shape and extends in a direction parallel to an axis of the first extrusion member, and the second side hole has a long hole shape and extends The direction is parallel to the axis of the second extrusion. The bone fixation device of claim 1, wherein the first extrusion member forms a plurality of first side holes, and the first side holes are axially arranged in at least one row and have a circular hole shape. The second extrusion member forms a plurality of second side holes that are axially arranged in at least one row and have a circular hole shape. A bone fixation device, disposed in a vertebra, comprising: an extrusion unit comprising a first extrusion member and a second extrusion member, the first extrusion member having a distal end and a proximal end, and forming a first shaft hole and at least one first side hole, the first shaft hole penetrating a proximal end of the first extrusion member, the first side hole is in communication with the first shaft hole, and the second extrusion member is movable The first extrusion member has a distal end and a proximal end, and defines a second shaft hole and at least a second side hole, the second shaft hole extends through the distal end of the second extrusion member and a first end member is disposed in the second shaft hole, and the second pressing member includes a sleeve, a fixing ring and a rod The sleeve includes a small diameter section, a sawtooth section and a large diameter section and defines a sleeve shaft hole extending through the two ends thereof. The fixing ring is disposed on the sawtooth section of the sleeve, and the sleeve includes a small diameter And a large diameter section of the rod body, the small diameter section of the rod body has a distal end and a proximal end, the large diameter section of the rod body has a distal end and a proximal end, and the proximal end of the small diameter section of the rod body At a distal end of the large diameter section of the rod body, a small diameter section of the rod body passes through the sleeve shaft hole and forms the second side hole, and an outer diameter of the large diameter section of the rod body is equal to a large diameter of the sleeve The outer diameter of the diameter section is such that the distal end of the large diameter section of the rod abuts against the large diameter section of the sleeve, the rod body forms the second shaft hole, and the second shaft hole penetrates the small diameter of the rod body a distal end of the segment and a proximal end of the large diameter segment of the shaft; an unfolded structure having a distal end and a proximal end and forming a plurality of voids, the distal end and the proximal end of the deployed structure being respectively disposed in the first and the a second extrusion member, the proximal end of the unfolding structure is disposed on the small diameter section of the sleeve, wherein the unfolding structure is when the second extrusion member moves toward the distal end of the first extrusion member The first and second extrusion members are pressed and expanded outward to an unfolded state to Opening a space in the interior of the vertebra at least in the direction of the spine, the first side hole being aligned with the second side hole, the first and second shaft holes being separated from the unfolding structure by the first and second side holes a covering unit having a distal end and a proximal end, wherein the distal end and the proximal end of the covering unit are respectively disposed on the first and second pressing members, and the covering unit covers the unfolding structure The fixing ring fixes the proximal end of the covering unit, wherein the covering unit is expanded by the unfolding structure when the unfolding structure is deployed to the unfolded state; and a anti-backing unit includes a first anti-backing structure And a second anti-retraction structure, the first anti-retraction structure is disposed on an outer wall surface of the first extrusion member, and the second anti-retraction structure is disposed on an inner wall surface of the second axial hole of the second extrusion member, wherein When the unfolding structure is deployed to the unfolded state, the first pressing member selectively restricts the second anti-retracting structure by the first anti-retracting structure to selectively restrict the second pressing member, so that The second extrusion member cannot move linearly in the direction of the proximal end of the first extrusion member, so that the unfolding structure is In the expanded state. The bone fixation device of claim 12, wherein the second shaft hole comprises a small diameter section, a polygonal hole section and a threaded section, and the small diameter section of the second shaft hole penetrates the rod body a small diameter section of the large diameter section of the rod body and extending through a proximal end of the large diameter section of the rod body, the threaded section of the second shaft hole being located in the large diameter section of the rod body and communicating And between the small diameter section of the second shaft hole and the polygonal hole section. The bone fixation device of claim 13 further comprising an assist deployment unit, the assist deployment unit comprising: a housing having a distal end and a proximal end; and an operating member disposed on the housing Proximal An auxiliary tube movably disposed in the housing, having a distal end and a proximal end, and forming a through hole extending through the distal end and the proximal end, the proximal end of the auxiliary tube being disposed on the operating member, the auxiliary tube a distal end having a polygonal shape and a polygonal hole section embedded in the second axial hole; and a catheter disposed at the insertion hole of the auxiliary tube and having a distal end and a proximal end, the distal end of the catheter protruding from the The distal end of the auxiliary tube is screwed to the threaded section of the second shaft hole. The bone fixation device of claim 14, wherein the assist deployment unit further comprises a sleeve having a distal end and a proximal end and forming a through hole extending through the distal end and the proximal end The portion of the auxiliary tube exposed to the housing penetrates the through hole of the sleeve, and the distal end of the auxiliary tube protrudes from the distal end of the sleeve. The bone fixation device of claim 13, further comprising an injection unit, the injection unit comprising: a body having a distal end and a proximal end, and a medical filler inside; a pushing member Provided at a proximal end of the body; an extension tube having a distal end and a proximal end, and forming a first-class channel, the proximal end of the extension tube is disposed at a distal end of the body, the flow channel of the extension tube and the body Internally connected; a sleeve having a distal end and a proximal end and defining a through hole extending through the distal end and the proximal end; and a catheter having a distal end and a proximal end, the catheter being threaded through the sleeve a through hole of the tube, the distal end of the catheter protruding from the distal end of the sleeve, and being screwed to the second a threaded section of the shaft hole, the proximal end of the catheter protruding from the proximal end of the sleeve and disposed at a distal end of the extension tube, the interior of the conduit being in communication with the flow passage of the extension tube. The bone fixation device of claim 12, wherein the first anti-retraction structure is an external thread, and the second anti-retraction structure is an internal thread. The bone fixation device of claim 12, wherein the first anti-retraction structure comprises a plurality of first block barbs, and the first block barbs are axially arranged in a row or a plurality of rows, The second anti-backup structure includes a plurality of second block barbs, and the second block barbs are axially arranged in a row or a plurality of rows. The bone fixation device of claim 12, wherein the first anti-backup structure comprises a plurality of first annular barbs, the first annular barbs are axially spaced, the second anti-backing The structure includes a plurality of second annular barbs that are axially spaced apart. The bone fixation device of claim 12, wherein the first side hole extends in a direction of a proximal end of the first extrusion member toward the proximal end of the first extrusion member to have a slanted hole shape. The second side hole extends in a direction of the distal end of the second extrusion member in the direction of the distal end of the second extrusion member to have an oblique hole shape, wherein the first and second side holes extend in different directions. The bone fixation device of claim 12, wherein the first side hole has a long hole shape and extends in a direction parallel to an axis of the first extrusion member, and the second side hole has a long hole shape and extends The direction is parallel to the axis of the second extrusion. The bone fixation device of claim 12, wherein the first extrusion member forms a plurality of first side holes, the first side holes being axially arranged in at least one row and having a circular hole shape, The second extrusion member forms a plurality of second side holes that are axially arranged in at least one row and have a circular hole shape.