TWI539939B - Reversible Implantation with Microstones - Google Patents

Description

Reverse locking implant with fretting bone stimulation

The invention relates to an implant, in particular to an implant capable of generating micro-stimulation of vertebral body and small joints, and achieving a better reverse-clamping action to more securely fix the implant at the implant.

According to the current problem, it is common to solve the problem of discomfort caused by old degenerative diseases or other external forces in the spine or facet joints.

For example, the national publication No. I439252 "intervertebral implant and its implant device" patent case; as shown in Figure 3, between the two adjacent vertebrae, the opening will be closed by the adjacent two vertebrae, must Pushing the tension through the top of the positioning member can open the adjacent two vertebrae to a preset spacing. In this way, in addition to increasing the component cost and the surgical operation step, after the body is implanted to the predetermined correct position, only the adjacent two vertebrae are compressed, and the system is in an incompletely fixed state, so when the positioning member passes through the rotary control rod When the expansion hole is screwed and displaced, the body is easily pushed and disengaged from the correct position to cause an offset, which causes defects such as difficulty in re-adjusting or implanting, such as increasing difficulty in surgery and time.

In addition, according to Wolff's law, the function of the bone is to withstand the mechanical strain of the bone tissue during the activity. That is, bones have the ability to adapt to these functional needs. In other words, when the bone is stimulated by external force, whether it is tension or pressure, its bone will proliferate as the force of the burden is increased. However, the conventional body is forced to hold the two vertebrae through the positioning member, and the rear body has a fixed structure, so that the human body At the time of activity, it is impossible to produce bone stimulating effect on the inner surface of the vertebra, so that the bone proliferation efficiency is not good.

In view of this, the present inventors actively develop research and can create a kind of bone fusion which can promote bone hyperplasia, accelerate the bone fusion, and can omit the positioning member, the control rod structure and the rotation stretching step, and effectively reduce the manufacturing cost and operation time. Install a more convenient and firmer implant.

The main object of the present invention is to provide a shape that can be changed with the shape of the inner surface of different vertebral bodies or facets to produce a micro-stimulation vertebral body or facet joint to effectively promote bone hyperplasia and accelerate bone graft fusion, and achieve a better reverse card. The solid action makes it more stable to fix the implant at the site where there is no detachment at the implant.

A second object of the present invention is to provide an implant that can automatically generate a phase reverse snap without any component, effectively streamline the component, simplify the surgical procedure, and is more convenient and quick to install.

It is yet another object of the present invention to provide an implant having a multi-stage reverse snap to provide a more secure card retention.

To achieve the foregoing objective, the present invention provides a reverse-locking implant with a fretting bone stimulation, comprising at least: a body having a first end in an implant direction and a second different from the implant direction The inner portion of the body has a hollow space, and the body has at least two elastic fastening units disposed opposite to the hollow space, so that the body forms a fixed frame structure, and each elastic fastening unit has at least one or more elastic cards. a plate assembly, each of the elastic card plates has a first end portion for connecting the body or the connected connecting end, and a free end opposite to the second end portion, and each of the end portions protrudes from the body fixing frame outer surface The surface is formed with a front reversed high convex surface between the connecting end and the free end, and a serrated surface is protruded from the outer surface of each of the movable reverse clamping portions.

Thereby, the present invention utilizes the body to form a fixed frame to strengthen the support structure, and the front lower low and high convex surface movable reversely clamped portions can be offset with the shape of the inner surface of different vertebral bodies or facets, so that the activities of the human body are reversed when the activities are active. The carding part can automatically generate fretting friction (bone stimulation) on the inner surface of each vertebral body or facet joint to promote bone regeneration and accelerate bone graft fusion. It also has the effect of simplifying components, simplifying surgical procedures, low cost and firming of reverse fixation. Positioning without the advantages of falling off.

10, 40, 10A‧‧‧ implants

11‧‧‧Ontology

12‧‧‧ upper surface

13‧‧‧ Lower surface

14‧‧‧ First end

15‧‧‧second end

16‧‧‧ hollow space

17‧‧‧through hole

20‧‧‧Flexible unit

19‧‧‧ Fusion hole

A, B, C, D‧‧‧

30‧‧‧ vertebral body

21, 22, 21a, 22a, 23a‧‧‧Flexible card board

211, 221‧‧‧ link

212, 222‧‧‧ free end

213‧‧‧Reverse reverse clamp

50‧‧‧ implants

51‧‧‧Ontology

52‧‧‧ hollow space

53‧‧‧through hole

60‧‧‧Flexible fastening unit

61, 62, 63‧‧‧Flexible card board

64‧‧‧First convex

623, 633‧‧ ‧ missing slot

614, 624‧‧‧ second convex

625, 635‧‧‧ shoulder

70‧‧‧Triangular long cylinder

Fig. 1 is a schematic view showing the implantation of the facet joint of the present invention.

Fig. 2 is a schematic view showing the relationship between the implantation of the two vertebral bodies and the variation of the internal curvature of the vertebral body.

Fig. 3 is a perspective view showing the flat rectangular shape of the present invention in a D shape.

Fig. 4 is a schematic view showing the zigzag groove line of the present invention.

Figure 5 is a schematic illustration of a side cross section of the present invention.

Fig. 6 is a schematic view showing the inner surface of the vertebral body of the micro-motion massage (bone stimulation) of the present invention.

Figure 7 is a schematic view of another embodiment of the strip of the present invention.

Figure 8 is a schematic view showing the arrangement of the plurality of elastic card plates in the inner and outer spaces.

Figure 9 is a schematic view showing the arrangement of the plurality of elastic card plates in the left and right intervals.

Figure 10 is a perspective view of a cylindrical shape.

Figure 11 is a side cross-sectional view showing the tenth figure of the present invention.

Figure 12 is a schematic cross-sectional view of a radial section of Figure 10 of the present invention.

Figure 13 is a schematic view showing the displacement of each of the elastic card plates in Fig. 10 of the present invention.

Figure 14 is a perspective view of a triangular cylinder.

As shown in Figures 1 and 2, the present invention provides an implant 40, 10 implanted between the facet joints of the vertebral body or between the two vertebral bodies, as shown in Figures 2 to 6, for planting. For example, the implant 10 is integrally formed, and the implant 10 is integrally formed, and includes at least a body 11 having a flat rectangular shape and a D shape. The body 11 has an upper surface 12 provided with a occlusal serrated surface. And a surface 13 having a first end portion 14 opposite to the implantation direction and a second end portion 15 further away from the implantation direction, the first end portion 14 being formed to have a tapered shape or an arc shape to The implant body is easily and quickly guided between the two vertebral bodies 30. The body 11 has a hollow space 16 therein. The upper surface 12 and the lower surface 13 are opposite to the hollow space 16 and can be vertically opposed by a U-shaped groove A. Two elastic fastening units 20 are formed by the body 11 to form a fixed frame structure, and each of the elastic fastening units 20 can be composed of one or more (as shown in FIGS. 8 and 9) elastic card plates 21, each of which has a flexible card plate 21 The first end portion 14 is connected to the connecting end 211 of the body 11 and the free end 212 of the opposite second end portion 15 respectively. The upper surface 12 and the lower surface 13 of the body 11 maintain the elastic clamping unit 20 in a state of elastic outer tension in a normal state, so as to form a front low rear high convex shape between the connecting end 211 and the free end 212. The reversely-fastened portion 213 is a reversely-locked structure in which each of the movable reversely-locked portions 213 is elastically deformed toward the hollow space 16 when subjected to an external force.

As shown in FIG. 4, the groove line of the U-shaped groove B can be a sawtooth structure to prevent the left and right offset from occurring when the elastic fastening unit 20 (elastic card 21) is displaced. In addition, the implant 10 of the present invention is not limited to the aforementioned general D shape. The shape is actually designed according to the requirements of the installation site. For example, as shown in FIG. 7, the implant 10A of the present invention has an elongated appearance, for example, as shown in FIG. 10, the implant 50 of the present invention has an elliptical column appearance. modeling.

As shown in FIG. 4, the second end portion 15 of the body 11 of the present invention is provided with a through hole 17 which is connected to the hollow space 16 by the end surface, and the through hole 17 can be a concave hole or a screw. Hole structure. A fusion hole 19 is communicated with the hollow space 16 in the middle of each of the elastic fastening units 20 and outside the body 11 for bone fusion of the autogenous bone or artificial bone or other filler.

The implantation or removal operation, as shown in FIG. 2, the reverse constricting portion 213 of the present invention is formed by the reverse locking portion 213, which is a lower front and a high convex surface, that is, the connecting end 211 at the implantation end is lower, and The free end 212 on the outer side is higher, so that when the implant is reversed, the movable reversed portion 213 is compressed by the two vertebral bodies 30, and after being implanted into the correct position, the fixed body can be formed by the body 11. The two vertebral bodies 30 are supported and fixed, so that the movable reversely-locked portions 213 of the elastic card plates 21 on the outer side of the body 11 can automatically rebound against the inner surface of each of the vertebral bodies 30 to be reversely clamped, and each of the movable reverse-fitting portions 213 The multi-step reverse clamping can be achieved through the outer surface of the serration to make the positioning firmer. The invention does not need to pass through any tension member to achieve better reverse clamping and more secure positioning without prolapse. In particular, the body 11 of the present invention is a fixed frame structure having an enhanced supporting force, so that the normal height of the two vertebral bodies can be maintained by the body 11 after implantation to stabilize the vertebral body, so that each of the active reversely locking portions 213 can follow the different vertebral bodies 30. The shape of the inner surface changes to abut, and maintains a certain abutting area contact with the inner surface of the vertebral body 30. When the human body is active, each activity reversely engaging portion 213 can generate fretting friction to stimulate the inner surface of each vertebral body 30 (bone stimulation) to promote the benefit of bone hyperplasia to accelerate bone fusion, as shown in Fig. 6, and effective simplification elements. Advantages, simplified surgical procedures, low cost and so on.

As shown in FIG. 8, each of the elastic fastening units 20 of the present invention is composed of two or more elastic card plates, that is, each of the elastic fastening units 20 can be formed by two U-shaped grooves A. 21, 22 form an inner and outer layer spacing arrangement. Or, as shown in FIG. 9, each of the elastic fastening units 20 is formed by a substantially W-shaped cutting groove C, and the three elastic card plates 21a, 22a, and 23a are arranged in a left-right interval. This is an example, and is not limited. This configuration method. As shown in FIG. 8, each of the elastic card plates 21, 22 has a free end opposite to the first end portion 14 for joining the body 11 or connecting the connecting ends 211, 221 of the adjacent elastic card board and a second opposite end portion 15. 212, 222, and the free ends 212, 222 of the protruding body 11 of the elastic card plates 21, 22 can be unequal height configuration to form a multi-step reverse clamping structure to further strengthen the card fixing position. In addition, each of the elastic card plates 21, 22 can also be formed in an equal height, equal width or unequal width, equal length or unequal length configuration.

In addition, the body 11 of the present invention and the elastic card plates 21 and 22 of each of the elastic fastening units 20 can be made of metal or polymer materials, such as titanium, tantalum, cobalt, chromium, stainless steel, and liquid metal. Metal materials such as nickel, such as PEEK, PEKK, PU, PE, CarbonFiber, PVC, PC, PP and other plastic materials.

As shown in the figures 10 to 13, the body 51 of the implant 50 of the present invention is a cylinder or a long cylinder of at least three sides (such as a triangular cylinder of FIG. 14), and its structure is substantially the same as described above. The difference is that the columnar body 51 is disposed with respect to the inner hollow space 52. The plurality of elastic fastening units 60 protrude from the outer surface of the body 51 to form a radial spacing, and each of the elastic fastening units 60 can also be one or more elastic cards. The plate assembly, that is, each of the elastic fastening units 60 is cut along the section D There are a plurality of elastic card plates 61, 62, 63 forming an inner and outer layer spacing arrangement, or forming a left and right spacing arrangement as shown in FIG. 9, and each of the elastic card plates 61, 62, 63 can also form an equal height or an unequal height. , equal width or unequal width, equal length or unequal length configuration, and achieve the same effect as the foregoing.

Taking the eleventh figure as an example, when each of the elastic fastening units 60 is composed of a plurality of elastic card plates 61, 62, 63, the elastic card plates 61 closest to the through holes 53 are convexly provided with a first matching with the implanting tool. The protrusion 64 is disposed between the two adjacent elastic cards 61, 62, and 63. The linkage mechanism includes a slot 623, 633 disposed between the adjacent elastic cards 61, 62, and 63. And the second protrusions 614 and 624, wherein the second protrusions 614 and 624 are respectively disposed on the adjacent elastic card plates 61 and 62, and the lower ends of the notches 623 and 633 form a shoulder portion 625. 635 for each of the second convex portions 614, 624 abutting, so that the outermost layer of the implanting tool is firstly crimped when the first convex portions 64 of the elastic card plates 61 are retracted, and the second convex portions of the other side can be 614, 624 presses the shoulders 625, 635 to synchronously drive the adjacent elastic plates 62, 63 of the inner layer to move inwardly toward the hollow space 52, so that the implant 50 can be smoothly implanted or taken out.

In summary, the present invention is indeed unprecedented, and has the above advantages, is a highly creative concept, as the appearance or shape or structure of the implant can be implemented for a variety of different transformations. Therefore, regardless of the appearance or shape or structure of the implant, it will fall within the scope of the present invention and should be protected by intellectual property rights.

10‧‧‧ implants

11‧‧‧Ontology

12‧‧‧ upper surface

13‧‧‧ Lower surface

14‧‧‧ First end

15‧‧‧second end

16‧‧‧ hollow space

17‧‧‧through hole

20‧‧‧Flexible unit

19‧‧‧ Fusion hole

A‧‧‧ 沟沟

21‧‧‧Flexible card board

211‧‧‧ link

212‧‧‧Free end

213‧‧‧Reverse reverse clamp

Claims (8)

A reverse locking implant with a fretting bone stimulation, comprising at least a body having a first end in an implant direction and a second end different from the implant direction, the body having a hollow space therein The body is configured to form at least two elastic fastening units with respect to the hollow space, so that the body forms a fixed frame structure, and each elastic fastening unit has at least one elastic card plate, and each elastic card plate has an opposite first end portion. The connecting end of the connecting body and the free end of the opposite second end are respectively protruded from the outer elastic outer frame of the body fixing frame to form a front low rear high convex surface between the connecting end and the free end. The movable action is opposite to the locking portion, and the outer surface of the reverse engaging portion is convexly provided with a serrated surface, so that the oppositely fixed portions of the movable body can be changed with the shape of the inner surface of different vertebral bodies or small joints to generate a micro motion. Stimulate vertebral or skeletal hyperplasia. A reversely locking implant with a fretting bone stimulation according to claim 1, wherein each of the elastic fastening units is integrally formed with the body. The reverse locking implant with micro-motion bone stimulation according to claim 1, wherein the body and each elastic fastening unit are made of metal materials such as titanium, tantalum, cobalt, chromium, stainless steel, liquid metal, and PEEK, PEKK, PU, PE, CarbonFiber, PVC, PC, PP and other polymer materials are made of different materials. The reverse locking implant of claim 1 , wherein the body is a flat rectangular body having at least an upper surface and a lower surface, wherein the upper surface and the lower surface are respectively opposite to the inner hollow space The two elastic clamping units are arranged to be vertically disposed opposite to each other, and the respective ends are respectively protruded from the upper surface and the lower surface to form a front low and high convex surface active reverse direction between the connecting end and the free end. Carding department. a reverse-locking implant with a fretting bone stimulation according to claim 1, wherein the body The inner body of the cylindrical body has an axial hollow space, and the body is divided into a plurality of elastic fastening units arranged in a radial interval with respect to the hollow space. Each of the free ends protrudes from the outer surface of the column to form a front, rear, and convex surface active reversely-shaped portion between the connecting end and the free end. In the reverse locking implant of the item 4 or 5 with a fretting bone stimulation, the groove line of the groove may be a sawtooth structure to make the elastic plates displace the top vertebral body or bone more smoothly. The elastic locking unit comprises at least a plurality of elastic card plates, wherein the plurality of elastic card plates can be formed by cutting a groove, and each elastic card plate can be equal to the reverse locking device of the item 1 with the micro-motion bone stimulation. High or unequal height, equal width or unequal width, equal length or unequal length configuration. The reverse locking implant of the item 7 with a fretting bone stimulation, wherein the second end portion is provided with a through hole communicating with the hollow space, and each of the elastic fastening units is convexly disposed with the implanting tool opposite to the through hole The first convex portion is matched, and the adjacent two elastic card plates are oppositely disposed with a relative abutting interlocking mechanism, and the linking mechanism includes a notch and a second convex portion disposed on the adjacent two elastic card plates. A shoulder portion is formed at a lower end of each of the notches, and each of the second protrusions is disposed on the first compressed elastic card plate, so that the second protrusion portion can abut the shoulder of the adjacent elastic card plate Adjacent two elastic card plates are formed to be interlocked toward the inner hollow space, so that the implant can be smoothly implanted or taken out.