TWI533836B - Spinal cage and implant apparatus thereof - Google Patents

Description

Interbody fusion cage and implant device thereof

The invention relates to an intervertebral cage and an implant device thereof, in particular to an adjustable angle intervertebral cage and an implant device thereof.

The current common spinal diseases, such as osteoporosis leading to collapse of the vertebrae, due to cancer cell tumor metastasis to the vertebrae, abnormal joints between the intervertebral joints and surrounding tissues, etc., make people often accompanied by severe pain during activities. Such patients often require vertebral replacement surgery to remove the problematic vertebral segments and implant them with a spinal cage.

Conventional interbody fusion cages are often oversized and often require larger wounds during surgery to facilitate implantation of the interbody cage. Such open surgery is not beneficial to the patient. The patient must withstand a wide range of muscle and tissue damage in the body, resulting in a long recovery time after surgery, which is likely to adversely affect the patient. In addition, since the conventional interbody fusion cages are mostly of a single structural type, only a single fixed angle is provided, and in general, the interbody cage is often placed at an angle with the patient's spinal vertebrae after being placed. Rather than being parallel, it leads to factors such as an increase in the degree of difficulty in surgery and prolonged operation time, such as an increase in the angle of the intervertebral cage.

Therefore, how to design an interbody fusion cage to improve the large wounds and slow recovery caused by the above open surgery, and to have an angle adjustment mechanism to overcome the interbody fusion cage and the patient's spinal vertebral joint It will have an angle, and it can reduce the operation time and reduce the difficulty of surgery. It is one of the urgent problems to be solved.

In view of the above problems, an object of the present invention is to provide an interbody fusion cage and an implantation apparatus thereof, which can be combined with a minimally invasive surgical method to reduce the size of a wound corresponding to an interbody cage in order to reduce the conventional open surgery, and The angle adjustment mechanism can adjust the angle of implantation according to the situation when implanting the interbody fusion cage, which can effectively improve the operation time and increase the convenience of surgery.

In order to achieve the foregoing or other objects, the present invention provides an interbody fusion cage comprising: a plurality of positioning members; four assembly members, each of the assembly members having at least two joint points, the assembly members passing through the The positioning member pivotally connects the joint points to each other, and defines a quadrilateral by a line connecting the joint points, and defines a first line with one of the squares of the quadrilateral; the sleeve has a first a hollow slot and at least one first connection point, the sleeve is pivotally connected to the binding points at one end of the first connection line through the positioning points by the first connection point, and the first connection point is defined The pivoting axis is a first axial direction; the second rod body defines a direction in which the second rod body is disposed in the first hollow slot of the sleeve is a second line; and a limiting movement unit is configured to limit the second axis Moving the rod body in a third axial direction, the limiting moving unit has at least one second connecting point, and the limiting moving unit is connected to the second connecting point The connecting points are pivotally connected to the other end of the first connecting line, and the pivoting axis defining the second connecting point is a second axial direction, wherein the third axial direction and the first The two axial directions intersect at a point; wherein the assemblies are changeable between the first type and the second type along the first line, and the second rod moves away from the third axis In the second axial direction, the assemblies are converted from the first type to the second type such that an angle is formed between the first line and the second line.

The present invention provides an implant device using the interbody cage, comprising: a hollow catheter having a hollow inner surface at one end having a thread for connecting a thread formed on an outer surface of one end of the sleeve; and a tie rod having a cylindrical body and a handle portion of the hollow conduit, the one end of the cylinder is fixed to the handle portion, and the other end surface of the cylinder is threaded to connect the second rod, thereby moving the second rod Positioning in the third axial direction, and the second rod body can be disposed into the first hollow slot of the sleeve to control the angle between the first connecting line and the second connecting line .

With the interbody cage of the present invention and the implanting device thereof, the combination of the interbody cage and the positioning member enables the interbody cage to change between the first type and the second type. To reduce the wounds that must be created when implanting the cage. The second rod is restricted by the restricting movement unit and can only move in the third axial direction. After the second rod is placed into the sleeve, that is, after the interbody cage is changed from the first type to the second type, The intervertebral cage can be angled with the implantation direction, and the angle can be adjusted as appropriate. Therefore, in addition to the advantages of small wounds, it is also possible to adjust the implantation angle, shorten the operation time, reduce the difficulty of surgery, and increase the convenience of surgery. efficacy.

10‧‧‧ interbody fusion cage

11, 12, 13, 14, 15, 16, 17, 18‧‧‧ positioning parts

21, 22, 23, 24 ‧ ‧ assemblies

235, 245‧‧‧ grooves

211, 212, 213, 214, 221, 222, 223, 224, 231, 232, 233, 234, 241, 242, 243, 244‧‧

30‧‧‧First connection

31‧‧‧ sleeve

311‧‧‧ first hollow trough

312, 313‧‧‧ first connection point

314‧‧‧First axial

315‧‧‧Second hollow trough

316‧‧‧Apartment

317, 343, 363, 401, 413‧‧ thread

32‧‧‧Frame parts

321, 322‧‧‧second connection point

323‧‧‧second axial

324, 325‧‧ ‧ openings

33‧‧‧First body

331‧‧‧ Third axial direction

332‧‧‧Fixed parts

333‧‧‧ annular recess

34‧‧‧Second body

341‧‧‧ hole

342‧‧‧ accommodating slots

345‧‧‧Block

35‧‧‧Second connection

36‧‧‧ screws

344, 361‧‧‧ rods

362‧‧‧Cylinder

364‧‧‧ screw holes

37‧‧‧ square parts

371‧‧‧Chute

372‧‧‧Restrictions

373‧‧‧ openings

Θ‧‧‧ angle

H1, h2‧‧‧ length

40‧‧‧ catheter

41‧‧‧ lever

411‧‧‧Cylinder

412‧‧‧Hands

42‧‧‧ screw handle

1A is a schematic view of a first aspect of the interbody fusion cage of the present invention; FIG. 1B is a schematic view of another perspective of the first type of interbody fusion cage of the present invention; FIG. 2 is a cross-sectional fusion of the present invention. FIG. 3 is a schematic view showing the connection of the embodiment of the sleeve, the restricting movement unit and the second rod of the interbody cage of the present invention; FIG. 4 is the intervertebral fusion of the present invention. 2 is a schematic view of a first form of another embodiment of the interbody fusion cage of the present invention; FIG. 5B is another embodiment of the interbody fusion cage of the present invention; 2A, 6B is a schematic view of the intervertebral cage of the implant device of the present invention; and FIG. 7 is a sleeve, a restricted mobile unit and a second rod of the interbody cage of the present invention; A schematic diagram of the connection of another embodiment of the body.

The embodiments of the present invention are described below by way of specific embodiments, and those skilled in the art can readily understand other advantages and functions of the present invention by the disclosure of the present disclosure, and may also Specific embodiments are implemented or applied. Accordingly, any components of the present invention that are encompassed by any of the specific embodiments disclosed herein can be combined with any of the components of any other embodiments disclosed herein.

Please refer to FIGS. 1A, 1B, 2, 3, 4, and 7 at the same time. FIG. 3 is a schematic view showing the connection of the sleeve 31, the restricting movement unit and the second rod body 34 of the interbody cage 10 of the present invention. In one embodiment, as shown in FIG. 3, the limiting movement unit is a combination of the frame member 32 and the first rod 33; in another embodiment, as shown in FIG. As used, it refers to the square member 37. The limiting mobile unit is used to limit the movement of the second rod 34 in the third axial direction. The detailed technical means will be described as follows.

(1) Limiting the first implementation form of the mobile unit

As shown in Fig. 3, the interbody cage 10 of the present invention comprises a plurality of positioning members (11, 12, 13, 14, 15, 16, 17, 18) and four assemblies (21, 22, 23, 24). The sleeve 31, the frame member 32, the first rod body 33 and the second rod body 34. Each of the assemblies 21, 22, 23, 24 has at least two joint points. In one embodiment, each of the assemblies 21, 22, 23, and 24 has four joints, respectively, but the invention is not limited thereto, and each of the assemblies may have only two joints. The assemblies 21, 22, 23, 24 may in particular be semi-circular hollow cylinders having a radial length h1 smaller than the axial length h2. The assembly members 21, 22, 23, 24 can pivotally connect the joints 211, 212, 213, 214, 221, 222, 223, 224, 231 through the positioning members 11, 12, 13, 14, 15, 16, 17, 18. 232, 233, 234, 241, 242, 243, 244 are used to enable the assemblies 21, 22, 23, 24 to be interconnected. Please refer to FIG. 2 to understand that the positioning point of the positioning member 11 is pivotally connected to the assembly 22. 221 and the joint point 211 of the assembly member 21, the positioning member 15 is pivotally connected to the joint point 224 of the assembly member 22 and the joint point 214 of the assembly member 21. The pivot centers of the pivotally positioned positioning members 11, 15 are on the same axis. The locating member 12 pivotally joins the joint 214 of the assembly 21 and the joint 232 of the assembly 23, the locating member 16 pivotally connects the joint 213 of the assembly 21 and the joint 233 of the assembly 23, and the pivoted locator 12 The axis of the two is located on the same axis; the positioning member 13 is pivotally connected to the joint 231 of the assembly 23 and the joint 241 of the assembly 24, and the positioning member 234 of the positioning member 17 is pivotally coupled to the assembly 23 and the assembly 24 The joint point 244, the axis of the pivoting positioning members 13, 17 are located on the same axis; the positioning member 14 pivotally connects the joint point 222 of the assembly 22 and the joint point 242 of the assembly 24, the positioning member 18 pivot The joint point 223 of the assembly member 22 and the joint point 243 of the assembly member 24, the pivot centers of the pivotally positioned positioning members 14, 18 are located on the same axis. Therefore, after the components 21, 22, 23, 24 are connected to each other, the four positions on the same side can be used as the vertices at the position where the positioning member and the joint point are pivoted (ie, the joint point is used as the apex, or the anchor point is used. As a vertex, a quadrilateral is defined, for example, the positioning members 11, 12, 13, 14 are connected in a quadrilateral shape, or the positioning members 15, 16, 17, 18 are connected in a quadrilateral shape. The plurality of joint points on the diagonal of one of the quadrilaterals, that is, the center points of the joint points 221, 241 (or 211, 231), can define the first line 30, or can be positioned The center point of both 11, 13 (or 15, 17) to define the first connection 30. Since the assembly members 21, 22, 23, 24 and the positioning members 11, 12, 13, 14, 15, 16, 17, 18 are pivotally connected, the assembly members can be used as the axis of the positioning member. Rotating shaft for relative rotation, for example, assemblies 21, 22 can be fixed The axial centers of the two members 11 and 15 are relatively rotated, and the assembly members 22, 24 can be rotated relative to each other by the axes of the positioning members 14, 18, and the assembly members 24, 23 can be axially positioned by the positioning members 13, 17. In relative rotation, the assemblies 23, 21 are relatively rotatable about the axes of both of the positioning members 12, 16.

The sleeve 31 has a first hollow slot 311 and at least one first connection point. In one embodiment, the first connection points 312, 313 are two, but the invention is not limited thereto. The sleeve 31 pivotally connects the joint points 231, 241, 234, 244 of the first connecting line 30 through the positioning members 13 and 313 through the first connecting points 312, 313, and defines the pivot of the first connecting point 312, 313 The connecting axial direction is the first axial direction 314. Thus, the sleeve 31 can be rotated relative to the assembly 23, 24 in the direction of rotation of the first axial direction 314.

The frame member has at least one second connecting point, and the frame connecting member is pivotally connected to the binding points located at the other end of the first connecting line through the positioning points, and defines the second connecting point The pivoting axis of the connection point is the second axial direction. In detail, the frame member 32 has at least one or more second connection points. In an embodiment, the second connection points 321 and 322 are two, but the invention is not limited thereto. The frame member 32 is specifically a quadrangular frame, and the opposite sides are respectively provided with second connection points 321, 322. The frame member 32 pivotally connects the joint points 211, 221, 214, 224 on the first connecting line 30 through the positioning members 11 and 322 through the second connecting points 321 and 322, and defines the pivot of the second connecting point 321 and 322. The connecting axial direction is the second axial direction 323. Therefore, the frame member 32 can be rotated relative to the assembly 21, 22 in the direction of rotation of the second axial direction 323.

a first rod body is disposed in the frame member, and an axial direction of the first rod body The second axis is perpendicular. In detail, the frame member 32 is provided with openings 324, 325 respectively on the opposite two sides of the second connection points 321 and 322, and the first rod 33 passes through the frame member 32. The openings 324, 325 are provided in the frame member 32. One end of the first rod body 33 has an annular recess 333. After the first rod body 33 passes through the openings 324 and 325 of the frame member 32, the fixing member 332 is sleeved on the annular recess 333. The first rod body 33 can be fixed in the frame member 32, and the third axial direction 331 of the fixed first rod body 33 is perpendicular to the pivotal axial direction of the second connection points 321, 322, that is, the third axis. The direction 331 is perpendicular to the second axis 323, and the third axis 331 intersects the second axis 323 at a point.

a second rod body having a hole whose opening direction is perpendicular to an axial direction of the second rod body, and the hole can be sleeved on the first rod body and the second rod body can be in the first rod body The axial movement is performed, and the direction in which the second rod body is disposed into the first hollow groove of the sleeve is defined as a second line. In detail, the second rod body 34 has a hole 341 whose opening direction is perpendicular to the axial direction of the second rod body 34, and the hole 341 is for arranging the second rod body 34 on the first rod body 33, Therefore, the diameter of the hole 341 must be greater than or equal to the diameter of the first rod 33 so that the hole 341 is sleeved on the first rod 33. The second rod body 34 must be sleeved on the first rod body 33 before the first rod body 33 completely passes through the two openings 324, 325 of the frame member 32. That is, after the first rod body 33 passes through the opening 325 of the frame member 32, it passes through the hole 341 of the second rod body 34, passes through the opening 324 of the frame member 32, and then is sleeved by the fixing member 332. In the annular recess 333. In this way, the second rod body 34 can move in the third axial direction 331 of the first rod body 33, that is, the frame member 32 and the first rod body are included. The restraining movement unit of the combination of 33 can restrict the movement of the second rod 34 in the third axial direction 331. In addition, the first hollow slot 311 of the sleeve 31 is greater than or equal to the second shaft 34, so that the second rod 34 can be disposed into the first hollow slot 311 of the sleeve 31 and define the second rod 34. The direction of the first hollow groove 311 into the sleeve 31 is the second line 35.

Since the assembly members 21, 22, 23, 24 are specifically semi-circular hollow cylindrical bodies whose radial length h1 is smaller than the axial length h2, the second hollow body 34 is disposed in the first hollow groove 311 of the sleeve 31. After that, that is, the second connection point (321, 322) on the second axial direction 323, the positioning member (11, 15), the joint point (211, 214) of the assembly 21, and the joint point of the assembly 22 (221, 224) The first connection point (312, 313) along the first line 30 to the first axial direction 314, the positioning member (13, 17), the junction point (231, 234) of the assembly 23, the assembly 24 By combining the points (241, 244), the assemblies 21, 22, 23, 24 can form an elliptical cylinder, and the radial length h1 of each of the assemblies 21, 22, 23, 24 is less than the axial length h2, so The radial diameter of the formed elliptical cylinder as a whole must be smaller than the axial length. Please refer to FIG. 4 , which is a schematic view showing the second form of the interbody cage 10 after the second rod 34 is disposed in the first hollow groove 311 of the sleeve 31 . When the second rod 34 is not disposed in the first hollow groove 311 of the sleeve 31, the assemblies 21, 22, 23, 24 exhibit a first type, as shown in FIG. 5A.

As described above, the assemblies 21, 22, 23, 24 can be matched by the positioning members 11, 12, 13, 14, 15, 16, 17, 18 and the second rod 34 and the sleeve 31. So that the interbody cage 10 can be in the first type and the second The types change between types, and can exhibit different shapes. Since the radial length h1 of the assemblies 21, 22, 23, 24 is less than the axial length h2, it is only necessary to create a wound of twice the radial length h1 when performing the operation, without creating an axial length h2 twice. For the size of the wound, the interbody cage 10 can be placed into the affected part with the first type of appearance, and then the interbody cage 10 is transformed into the second type. Therefore, the interbody cage 10 of the present invention performs the function of changing between the first type and the second type, and can achieve the requirement of a small wound of minimally invasive surgery.

In addition, in the first form of the interbody cage 10, please refer to the drawings 1A, 1B, 2, 3, and 5A, since the second rod 34 can be performed in the third axial direction 331 of the first rod 33. Moving, when the second rod 34 moves away from the second axial direction 323 in the third axial direction 331 of the first rod body 33, that is, the second rod body 34 and the second connecting points 321, 322 are not simultaneously located In the two axial directions 323, the first line 30 and the second line 35 intersect at a first axial direction 314 of the first connection points 312, 313 and have an angle θ. When the interbody cage 10 is transformed from the first type to the second type, please refer to FIG. 5B. The angle θ still exists after the transformation, that is, the first connection 30 and the second connection in the second type. An angle θ is sandwiched between the lines 35. Therefore, in addition to the function of being able to change between the first type and the second type, the interbody cage 10 of the present invention has the function of changing and adjusting between the first type and the second type. The intervertebral cage 10 functions as an angle θ to the implantation direction, and the magnitude of the angle θ can be determined by the length of the second rod 34 moving away from the second axial direction 323. The longer the deviation length, the larger the angle θ after changing from the first type to the second type, and vice versa.

In one embodiment, the sleeve 31 further includes a second hollow slot 315 adjacent to the first hollow slot 311. The first hollow slot 311 and the second hollow slot 315 penetrate the sleeve 31 together, and the second hollow slot 315 The radial length is greater than the radial length of the first hollow groove 311, and therefore, an abutting portion 316 is formed where the first hollow groove 311 abuts the second hollow groove 315. The outer surface of one end of the sleeve 31 is formed with a thread 317, specifically at one end of the first connection point 312, 313 remote from the sleeve 31. In one embodiment, the assemblies 23, 24 of the pivot sleeve 31 have grooves 235, 245, respectively, whether in the first or second form of the interbody cage 10. Both can provide the space required for the sleeve 31 to rotate along the first axial direction 314. In one embodiment, the second rod body 34 further includes a receiving groove 342 which is located inside one end of the hole 341 away from the second rod body 34. The surface of the receiving groove 342 is formed with a thread 343.

In one embodiment, referring to FIG. 4, when the interbody cage 10 is in the second configuration, the screw 36 is further included to fix the relative positions of the sleeve 31 and the second rod 34. The screw 36 has a rod member 361 having a radial length greater than a radial length of the rod member 361 and a cylindrical member 362 having a screw hole 364 for locking the screw tool, for example, a cross shape or a hexagonal shape. Screw holes, etc., for the cross screwdriver, hex driver to lock the screw 36. The surface of the rod 361 of the screw 36 is formed with a thread 363. Therefore, when the second rod 34 is disposed in the first hollow groove 311 of the sleeve 31 such that the interbody cage 10 assumes the second type, the screw 36 can be set. The second hollow groove 315 of the sleeve 31 is screwed into the thread 343 of the surface of the receiving groove 342 of the second rod 34 by the thread 363 of the surface of the rod 361 until the cylindrical member 362 of the screw 36 The abutting portion 316 of the sleeve 31 is abutted to fix the relative position between the sleeve 31 and the second rod 34.

The interbody cage 10 of the present invention can be used with an implant device comprising a hollow catheter 40 and a drawbar 41 for operation of the interbody cage 10. Referring to FIGS. 3, 4, 5A, and 6A, the duct 40 is hollow, and the hollow inner surface of one end of the duct 40 has a thread 401, and the thread 401 can be connected with the thread 317 formed on the outer surface of one end of the sleeve 31. The catheter 40 can be used to lock the interbody cage 10 by threads. The pull rod 41 has a cylinder 411 and a handle portion 412. The handle portion 412 is fixed to one end of the cylinder 411, and the surface of the other end of the cylinder 411 is formed with a thread 413. The thread 413 of the cylinder 411 can be matched with the thread 343 of the accommodating groove 342 in the second rod 34. Therefore, the cylinder 411 can be locked with the second rod 34 by the thread 413 and in the first axial direction 314. For the axis, the position of the second rod 34 on the third axial direction 331 of the first rod 33 is moved to adjust the angle θ between the interbody cage 10 and the implantation direction. In addition, when the pull rod 41 is moved in the hollow duct 40, the relative positions of the second rod body 34 and the sleeve 31 can be moved together, and the second rod body 34 can be disposed into the first hollow slot 311 of the sleeve 31. Further, the interbody cage 10 can be changed between the first type and the second type, that is, the angle θ between the first line 30 and the second line 35 is controlled.

After the angle adjustment is completed and the interbody cage 10 is converted from the first type to the second form, please refer to FIG. 6B again. The implant device of the present invention further includes a screw handle 42. The pull rod 41 is reversely spiraled out of the connection with the second rod body 34, and the screw handle 36 can be used together with the screw 36 to perform the locking operation of the interbody cage 10 in the second type to fix the sleeve 31 and the Two shots The relative position between the bodies 34 is the angle θ between the fixed interbody cage 10 and the direction of implantation.

(2) Limiting the second implementation form of the mobile unit

In another embodiment of the present invention, as shown in FIG. 7, the restricting movement unit means the square member 37. The square member 37 is for restricting movement of the second rod 34 in the third axial direction 331. The square member 37 has at least one second connecting point, and the square connecting member 37 is pivotally connected to the connecting points at the other end of the first connecting line through the positioning members, and is defined by the second connecting point. The pivotal axis of the second connection point is a second axial direction. In detail, the square member 37 has at least one or more second connection points. In an embodiment, the second connection points 321 and 322 are two, but the invention is not limited thereto. The square member 37 is specifically a square body, and the second connecting points 321 and 322 are respectively disposed on opposite sides. The square member 37 pivotally connects the joint points 211, 221, 214, 224 on the first connecting line 30 through the positioning members 11 and 322 through the second connecting points 321 and 322, and defines the pivot of the second connecting points 321 and 322. The connecting axial direction is the second axial direction 323. Thus, the square member 37 can be rotated relative to the assembly 21, 22 in the direction of rotation of the second axial direction 323.

The square member 37 includes a sliding groove 371, a restricting portion 372, and an opening 373. The sliding groove 371 is recessed from one of the square members 37 to the square member 37. The restricting portion 372 is disposed at the opening of the sliding groove 371. The direction may specifically be two restricting portions 372, and the opening 373 is formed between the two restricting portions 372. The second rod body 34 includes a rod member 344 and a block body 345. The area of the rod member 344 is smaller than the area of one side of the block body 345. The shape of the block 345 is consistent or slightly smaller than the chute 371 so that the block 345 can follow along the chute 371. The third axial direction 331 is moved. For example, the sliding groove 371 and the block 345 may be in the shape of a corresponding triangular cylinder or a square, or the shape of the corresponding spherical body, and the invention is not limited thereto. The third axial direction 331 and the second axial direction 323 are perpendicular to each other and intersect at one point.

The opening 373 is such that when the block 345 of the second rod 34 is moved in the sliding slot 371, the rod 344 of the second rod 34 can also move in the opening 373. Since the area of the rod 344 is smaller than the area of one surface of the block 345, the restricting portion 372 of the square member 37 can be used to restrict the block 345 from moving out of the chute 371 without leaving the chute. 371.

Therefore, the square member 37 can restrict the second rod body 34 from moving in the third axial direction 331 by the sliding groove 371, the restricting portion 372 and the opening 373, by moving the second rod body 34 to the chute of the square member 37. a position on the third axial direction 331 of the 371 to adjust the angle θ of the interbody cage 10 to the implantation direction, which is the second embodiment of the restriction movement unit, and the second embodiment and the first embodiment The state is different from the mobile unit only, and the other components are activated and the effects are the same, and will not be described here.

According to the interbody cage of the present invention and the implantation device matched with the interbody fusion cage, the interbody cage can be effectively transformed between the first type and the second type, and the minimally invasive surgery can be achieved. The advantages of the required small wounds. The interbody cage of the present invention has a structural design between the limiting movement unit and the second rod body, and can effectively adjust the restriction between the mobile unit and the second rod body when the interbody cage is in the first type. The relative position of the interbody cage can be changed to a second type, which can make the interbody cage have an angle with the implantation direction, and shorten the operation time, reduce the difficulty of surgery and increase Surgical convenience and other effects.

The above-mentioned embodiments are merely illustrative of the technical principles, features, and functions of the present invention, and are not intended to limit the scope of the present invention. Any person skilled in the art can do without departing from the spirit and scope of the present invention. The above embodiments are modified and changed. Equivalent modifications and variations made using the teachings of the present invention are still covered by the scope of the following claims. The scope of the invention should be as set forth in the following claims.

10‧‧‧ interbody fusion cage

11, 12, 13, 14‧‧ ‧ positioning parts

21, 22, 23, 24 ‧ ‧ assemblies

235, 245‧‧‧ grooves

30‧‧‧First connection

31‧‧‧ sleeve

312‧‧‧First connection point

315‧‧‧Second hollow trough

317‧‧‧ thread

32‧‧‧Frame parts

321‧‧‧second connection point

33‧‧‧First body

34‧‧‧Second body

Claims (10)

An interbody cage includes: a plurality of positioning members; each of the assembly members having at least two joint points, and the assembly members are pivotally connected to the joint points through the positioning members to be connected to each other And defining a quadrilateral by connecting the joint points, and defining a first connection line by one of the diagonals of the quadrilateral; the sleeve has a first hollow slot and at least a first connection point, The sleeve is pivotally connected to the binding points at one end of the first connecting line through the positioning points, and the pivoting axis defining the first connecting point is a first axial direction; a second rod defining a direction in which the second rod is disposed in the first hollow groove of the sleeve is a second line; and a restricting movement unit for restricting movement of the second rod in the third axial direction, the limit The mobile unit has at least one second connection point, and the restriction movement unit pivotally connects the binding points located at the other end of the first connection line through the positioning element, and defines the second connection point The pivoting axial direction is a second axial direction, wherein the first The axial direction intersects the second axis perpendicularly at a point; wherein the assemblies are changeable between the first type and the second type along the first line, and when the second rod is in the When the three axial directions move away from the second axial direction, the assemblies are converted from the first type to the second type such that an angle is formed between the first line and the second line. The interbody cage of claim 1, wherein the sleeve further comprises a second hollow groove adjacent to the first hollow groove to penetrate the sleeve, the second hollow groove having a radial length greater than The radial length of the first hollow groove is such that the first hollow groove abuts the second hollow groove to form an abutting portion. The interbody cage of the second aspect of the invention, wherein the second rod body comprises a receiving groove disposed inside one end of the second rod body, and the surface of the receiving groove forms a thread. The interbody cage according to claim 3, further comprising a screw having a rod member and a cylindrical member, wherein the radial length of the cylindrical member is greater than a radial length of the rod member, and the surface of the rod member Forming a thread, wherein when the second rod is disposed in the first hollow groove of the sleeve, the screw sleeve is sleeved into the second hollow groove of the sleeve to spiral the volume by the thread of the rod surface Threading the surface of the groove and abutting the cylindrical member against the abutting portion to fix the relative position between the sleeve and the second rod. The interbody cage according to any one of claims 1 to 4, wherein the assembly is a semicircular hollow column, and the second rod is disposed in the first hollow slot of the sleeve. Thereafter, the assemblies are capable of forming an elliptical cylinder having an axial length greater than a radial length. The interbody cage of claim 5, wherein the assemblies pivotally connected to the sleeve respectively have grooves for providing rotation of the sleeve along the first axial direction. space. An interbody cage according to claim 5, wherein the The first type is that the second rod is not disposed in the first hollow groove of the sleeve, and the second type is that the second rod is disposed in the first hollow groove of the sleeve. The interbody cage of claim 5, wherein the outer surface of one end of the sleeve is threaded. An implant device for use in an interbody cage according to any one of claims 1 to 8, comprising: a hollow catheter having a hollow inner surface at one end having a thread for connecting the sleeve a thread formed by the outer surface of the end; and a pull rod having a cylinder and a handle portion that can penetrate the hollow conduit, one end of the cylinder is fixed to the handle portion, and the other end surface of the cylinder is formed with a thread to connect the first portion a two-rod body, wherein the second rod body can be moved in the third axial direction, and the second rod body can be disposed in the first hollow slot of the sleeve to control the first connection line and The angle between the second lines. The implant device of claim 9, further comprising a screw handle for fixing a screw between the second rod and the sleeve to fix between the sleeve and the second rod Relative position.