Lumbar facet zygopophysis joint fusion device and lumbar vertebra fixing system using same

Abstract

The utility model discloses a lumbar facet zygopophysis joint fusion device which comprises a fusion plate, a fusion piece, a first fusion nail and a second fusion nail are fixedly arranged on one side face of the fusion plate, one end of the fusion piece is fixedly arranged on the fusion plate, and the other end of the fusion piece extends in the direction away from the fusion plate. The first fusion nail and the second fusion nail are located on the two opposite sides of the fusion piece respectively. The utility model further discloses a lumbar vertebra fixing system using the lumbar facet zygopophysis joint fusion device. According to the lumbar facet zygopophysis joint fusion device and the lumbar vertebra fixing system using the lumbar facet zygopophysis joint fusion device, advanced intervention is conducted on lumbar degenerative diseases, cost is low, trauma is small, the effect is good, and strength is appropriate.

Description

Technical Field

[0001] The utility model relates to the field of medical instruments, in particular to a fusion device suitable for lumbar facet joints and a lumbar fixation system using the fusion device. Background Art

[0002] Lumbar fixation and fusion is an important means for treating lumbar degenerative diseases and reconstructing spinal stability. The current fixation method is mainly pedicle screw fixation, that is, for the upper vertebra and the lower vertebra that need to be fixed, the lower articular process of the upper vertebra and the upper articular process of the lower vertebra are first completely removed (the lower articular process of the upper vertebra and the upper articular process of the lower vertebra form a facet joint), and then the upper vertebra and the lower vertebra are fixedly connected by pedicle screws. This fixation method completely removes the lower articular process of the upper vertebra and the upper articular process of the lower vertebra, so even after being fixed by pedicle screws, the stability of the spine is damaged, and the damage is large, and there are many complications. In addition, after being fixed by pedicle screws, the strength of the spine is too large, which is not conducive to patient activities. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a lumbar facet joint fusion device and a lumbar fixation system using the same, which can intervene in advance to treat lumbar degenerative diseases, with low cost, small trauma, good effect and appropriate strength.

[0004] The lumbar facet joint fusion device of the utility model comprises a fusion plate, a fusion piece, a first fusion nail and a second fusion nail are fixedly arranged on one side of the fusion plate, one end of the fusion piece is fixedly arranged on the fusion plate, and the other end of the fusion piece extends in a direction away from the fusion plate, the fusion piece is arranged perpendicular to the fusion plate, and the first fusion nail and the second fusion nail are respectively located on opposite sides of the fusion piece.

[0005] The lumbar facet joint fusion device of the utility model, wherein the fusion piece is in the shape of a plate, and is provided with a fusion hole penetrating through its two side surfaces, and a porous structure is fixedly provided in the fusion hole, the first fusion nail is arranged opposite to the porous structure on one side surface of the fusion piece, and the second fusion nail is arranged opposite to the porous structure on the other side surface of the fusion piece, and anti-slip teeth are fixedly provided on both side surfaces of the fusion piece.

[0006] The lumbar facet joint fusion device of the utility model, wherein the fusion piece is columnar, a fusion hole is provided on the fusion piece, the fusion hole radially penetrates the fusion piece, a porous structure is fixedly provided in the fusion hole, the first fusion nail is arranged opposite to the porous structure on one side of the fusion piece, the second fusion nail is arranged opposite to the porous structure on the other side of the fusion piece, and an anti-slip thread is fixedly provided on the outer circumferential side wall of the fusion piece.

[0007] In the lumbar facet joint fusion device of the utility model, the first fusion nail and the second fusion nail are both conical in shape, the large diameter end of the first fusion nail is fixed on the fusion plate, and the small diameter end of the first fusion nail extends in a direction away from the fusion plate, the large diameter end of the second fusion nail is fixed on the fusion plate, and the small diameter end of the second fusion nail extends in a direction away from the fusion plate.

[0008] In the lumbar facet joint fusion device of the utility model, a first barb is fixedly provided on the first fusion nail, one end of the first barb is fixedly provided on the outer peripheral side wall of the first fusion nail, and the other end of the first barb extends toward the large diameter end of the first fusion nail, and a second barb is fixedly provided on the second fusion nail, one end of the second barb is fixedly provided on the outer peripheral side wall of the second fusion nail, and the other end of the second barb extends toward the large diameter end of the second fusion nail.

[0009] In the lumbar facet joint fusion device of the utility model, the first barbs are arranged in multiple groups, the number of the first barbs in each group is set to multiple, the multiple groups of first barbs are evenly arranged along the axial direction of the first fusion nail, and each group of first barbs are evenly arranged along the circumference of the first fusion nail; the second barbs are arranged in multiple groups, the number of the second barbs in each group is set to multiple, the multiple groups of second barbs are evenly arranged along the axial direction of the second fusion nail, and each group of second barbs are evenly arranged along the circumference of the second fusion nail.

[0010] In the lumbar facet joint fusion device of the utility model, the number of the first fusion nail and the second fusion nail are both set to one, and the fusion plate, the fusion piece, the first fusion nail and the second fusion nail are all made of magnesium alloy.

[0011] The lumbar fixation system using the above-mentioned lumbar facet joint fusion device in the utility model includes an interspinous process fixation device used to connect the spinous process of the upper vertebra and the spinous process of the lower vertebra. The lumbar facet joint fusion device is used to connect the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra. The fusion plate is located at the posterior side of the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra. The fusion piece is located between the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra. The first fusion nail and the second fusion nail are nailed on the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra, respectively.

[0012] The lumbar fixation system of the utility model, wherein the interspinous process fixing device comprises a first fixing plate and a second fixing plate, the first fixing plate is provided with a through hole, the through hole passes through two side surfaces of the first fixing plate, a first fixing nail is fixedly provided on one side surface of the first fixing plate, a screw is provided on the other side surface of the first fixing plate, a fixing arm and a second fixing nail are fixedly provided on one side surface of the second fixing plate, one end of the fixing arm is fixedly provided on the second fixing plate, the other end of the fixing arm extends in a direction away from the second fixing plate, the fixing arm is inserted in the through hole and fixed to the first fixing plate by screws, the first fixing nail and the second fixing nail are arranged relatively, the first fixing plate and the second fixing plate are respectively located on opposite sides of the upper vertebral spinous process and the lower vertebral spinous process, the first fixing nail on the first fixing plate is respectively nailed on the upper vertebral spinous process and the lower vertebral spinous process, the second fixing nail on the second fixing plate is respectively nailed on the upper vertebral spinous process and the lower vertebral spinous process, and the fixing arm is located between the upper vertebral spinous process and the lower vertebral spinous process.

[0013] The utility model discloses a lumbar fixation system in which a screw seat is fixedly provided on the other side surface of the first fixing plate, the screw seat is provided with a threaded hole, the axis of the threaded hole is arranged along the radial direction of the through hole, the screw is threadedly connected in the threaded hole and abuts against the fixing arm, the side surface of the fixing arm abutting against the screw is provided with an uneven anti-slip surface, the shape of the fixing arm matches the shape of the through hole, the first fixing plate and the second fixing plate are both provided with weight-reducing holes, and the interspinous process fixing device is made of magnesium alloy.

[0014] The difference between the lumbar facet joint fusion device and the lumbar fixation system using the same and the prior art is that when the present invention is in use, the left inferior articular process of the upper vertebra and the left superior articular process of the lower vertebra, as well as the right inferior articular process of the upper vertebra and the right superior articular process of the lower vertebra are respectively connected by the lumbar facet joint fusion device of the present invention. Before the connection, a file is used to file off a part of the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra so that the gap between the two can accommodate the fusion piece of the lower fusion device, and a punching tool is used to punch a hole on the inferior articular process of the upper vertebra The first nail hole is placed on the upper articular process of the lower vertebra, and the second nail hole is made on the upper articular process of the lower vertebra. Then, the fusion device is positioned at the rear side of the upper vertebra and the lower vertebra, that is, the fusion plate is positioned at the rear side of the lower articular process of the upper vertebra and the upper articular process of the lower vertebra, and the fusion piece is inserted into the gap between the lower articular process of the upper vertebra and the upper articular process of the lower vertebra. During the insertion process, the first fusion nail is inserted into the first nail hole, and the second fusion nail is inserted into the second nail hole until the fusion plate abuts against the lower articular process of the upper vertebra and the upper articular process of the lower vertebra. In this way, the lower articular process of the upper vertebra and the upper articular process of the lower vertebra are connected together through the fusion device. The spinous process of the upper vertebra and the spinous process of the lower vertebra are connected by the interspinous process fixing device in the utility model. Since the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra are connected by the fusion device of the utility model, and the spinous process of the upper vertebra and the spinous process of the lower vertebra are connected by the interspinous process fixing device of the utility model, that is, the upper vertebra and the lower vertebra can be fixed by the lumbar fixation system of the utility model, and when the fusion device connects the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra, only a small part of the inferior articular process and the superior articular process is removed, instead of completely removing the inferior articular process and the superior articular process as required in the prior art, the stability of the spine can be further enhanced by the use of the utility model. Based on the above analysis, the utility model can achieve technical effects with low cost, low trauma, good effect and appropriate strength when intervening in advance to treat lumbar degenerative diseases.

[0015] The utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the first embodiment of the lumbar facet joint fusion device in the utility model;

[0017] Figure 2 for Figure 1 The left view (also the right view) of

[0018] Figure 3 for Figure 1 A top view of

[0019] Figure 4 for Figure 1 Bottom view of

[0020] Figure 5 It is a front view of the first fixing plate in the utility model;

[0021] Figure 6 for Figure 5 A top view of

[0022] Figure 7 for Figure 5 Left view of

[0023] Figure 8 for Figure 5 Rear view of

[0024] Fig. 9 It is a front view of the second fixing plate in the utility model;

[0025] Fig.10 for Fig. 9 Left view of

[0026] Fig.11 for Fig. 9 A top view of

[0027] Fig.12 for Fig. 9 Rear view of

[0028] Fig.13 It is a structural schematic diagram of the interspinous process fixing device in the utility model;

[0029] Fig.14 for Fig.13 A top view of

[0030] Fig.15 It is a schematic diagram of the structure of the upper vertebral body and the lower vertebral body before being fixed by the lumbar fixation system of the utility model;

[0031] Fig.16 It is a structural schematic diagram of the upper vertebral body and the lower vertebral body being fixed by the lumbar fixation system of the utility model;

[0032] Fig.17 It is a structural schematic diagram of the upper vertebral body and the lower vertebral body after being fixed for a period of time by the lumbar fixation system of the utility model;

[0033] Fig.18 It is a front view of the second embodiment of the lumbar facet joint fusion device in the utility model;

[0034] Fig.19 for Fig.18 The left view (also the right view) of

[0035] Fig. 20 for Fig.18 Top view of the . DETAILED DESCRIPTION

[0036] It should be noted that the “rear side”, “left side” and “right side” mentioned in this embodiment are based on the directions of the human body.

[0037] like Figure 1 As shown, combined with Figure 2-4 As shown in 18-20, the lumbar facet joint fusion device 25 in the utility model includes a fusion plate 1, on one side of which a fusion piece 2, 29, a first fusion nail 3 and a second fusion nail 5 are fixed, one end of the fusion piece 2, 29 is fixed on the fusion plate 1, and the other end of the fusion piece 2, 29 extends in a direction away from the fusion plate 1. Specifically, the fusion piece 2, 29 is arranged perpendicular to the fusion plate 1, and the first fusion nail 3 and the second fusion nail 5 are respectively located on opposite sides of the fusion piece 2, 29.

[0038] like Figure 1-4 What is shown is the structure of the first embodiment of the fusion device 25: the fusion piece 2 is in the shape of a plate, and is provided with a fusion hole 31 penetrating through its two side surfaces, a porous structure 28 is fixedly provided in the fusion hole 31, the first fusion nail 3 is arranged opposite to the porous structure 28 on one side surface of the fusion piece 2, the second fusion nail 5 is arranged opposite to the porous structure 28 on the other side surface of the fusion piece 2, and anti-slip teeth 27 are fixedly provided on both side surfaces of the fusion piece 2.

[0039] like Figure 18-20 What is shown is the structure of the second embodiment of the fusion device 25: the fusion piece 29 is columnar, and a fusion hole 31 is provided on the fusion piece 29. The fusion hole 31 radially penetrates the fusion piece 29, and a porous structure 28 is fixedly provided in the fusion hole 31. The first fusion nail 3 is arranged opposite to the porous structure 28 on one side of the fusion piece 29, and the second fusion nail 5 is arranged opposite to the porous structure 28 on the other side of the fusion piece 29. An anti-slip thread 30 is fixedly provided on the outer circumferential side wall of the fusion piece 29.

[0040] It can be seen that the difference between the second embodiment of the fusion device 25 and the first embodiment is that the structures of the fusion parts 2 and 29 are different, and the rest of the structures are exactly the same.

[0041] like Figure 1-4As shown in Figures 8-20, in two embodiments of the fusion device 25, the first fusion nail 3 and the second fusion nail 5 are both conical, and the two ends of the first fusion nail 3 and the second fusion nail 5 are respectively a large diameter end and a small diameter end, that is, the end with a larger diameter is the large diameter end, and the end with a smaller diameter is the small diameter end. The large diameter end of the first fusion nail 3 is fixed on the fusion plate 1, and the small diameter end of the first fusion nail 3 extends in a direction away from the fusion plate 1, specifically, the first fusion nail 3 is arranged perpendicular to the fusion plate 1. The large diameter end of the second fusion nail 5 is fixed on the fusion plate 1, and the small diameter end of the second fusion nail 5 extends in a direction away from the fusion plate 1, specifically, the second fusion nail 5 is arranged perpendicular to the fusion plate 1.

[0042] Of course, whether the fusion pieces 2 , 29 , the first fusion nails 3 and the second fusion nails 5 are arranged perpendicular to the fusion plate 1 or inclined to the fusion plate 1 can be determined according to actual conditions.

[0043] like Figure 1-4 As shown in 18-20, in two embodiments of the fusion device 25, a first barb 4 is fixedly provided on the first fusion nail 3, one end of the first barb 4 is fixedly provided on the outer peripheral side wall of the first fusion nail 3, and the other end of the first barb 4 extends toward the large diameter end of the first fusion nail 3, and a second barb 6 is fixedly provided on the second fusion nail 5, one end of the second barb 6 is fixedly provided on the outer peripheral side wall of the second fusion nail 5, and the other end of the second barb 6 extends toward the large diameter end of the second fusion nail 5.

[0044] As described below, the first fusion nail 3 and the second fusion nail 5 are nailed to the inferior articular process 22 of the upper vertebra 16 and the superior articular process 21 of the lower vertebra 17 respectively. By providing barbs, the pull-out resistance of the fusion nails can be enhanced, thereby enhancing the stability of the connection of the fusion device 25.

[0045] like Figure 1-4 As shown in 18-20, in two embodiments of the fusion device 25, the first barbs 4 are arranged in multiple groups, the number of the first barbs 4 in each group is set to multiple, the multiple groups of first barbs 4 are evenly arranged along the axial direction of the first fusion nail 3, and each group of first barbs 4 is evenly arranged along the circumferential direction of the first fusion nail 3, the second barbs 6 are arranged in multiple groups, the number of the second barbs 6 in each group is set to multiple, the multiple groups of second barbs 6 are evenly arranged along the axial direction of the second fusion nail 5, and each group of second barbs 6 is evenly arranged along the circumferential direction of the second fusion nail 5.

[0046] like Figure 1-4As shown in Figures 18-20, in the two embodiments of the fusion device 25, the number of the first fusion nail 3 and the second fusion nail 5 is set to one. In the two embodiments of the fusion device 25, the fusion device 25 is made of magnesium alloy, that is, the fusion plate 1, the fusion pieces 2, 29, the first fusion nail 3 (including the first barbs 4 thereon) and the second fusion nail 5 (including the second barbs 6 thereon) are all made of magnesium alloy. In the first embodiment of the fusion device 25, the anti-slip teeth 27 and the porous structure 28 on the plate-like fusion piece 2 are also made of magnesium alloy; in the second embodiment of the fusion device 25, the anti-slip threads 30 and the porous structure 28 on the columnar fusion piece 29 are also made of magnesium alloy. Magnesium alloy has good compatibility with the human body and is absorbable, thereby avoiding secondary surgery.

[0047] Combination Figure 5-14 As shown, the lumbar fixation system using the above-mentioned lumbar facet joint fusion device 25 in the utility model includes an interspinous process fixation device 26 for connecting the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, the lumbar facet joint fusion device 25 is used to connect the lower articular process 22 of the upper vertebra 16 and the upper articular process 21 of the lower vertebra 17, the fusion plate 1 is located at the rear side of the lower articular process 22 of the upper vertebra 16 and the upper articular process 21 of the lower vertebra 17, the fusion parts 2, 29 are located between the lower articular process 22 of the upper vertebra 16 and the upper articular process 21 of the lower vertebra 17, the first fusion nail 3 and the second fusion nail 5 are nailed on the lower articular process 22 of the upper vertebra 16 and the upper articular process 21 of the lower vertebra 17 respectively.

[0048] like Figure 5-14 As shown, the lumbar fixation system in the utility model, wherein the interspinous process fixation device 26 includes a first fixing plate 7 and a second fixing plate 12, a through hole 9 is opened on the first fixing plate 7, and the through hole 9 passes through the two side surfaces of the first fixing plate 7, a first fixing nail 8 is fixedly provided on one side surface of the first fixing plate 7, a screw 10 is provided on the other side surface of the first fixing plate 7, a fixing arm 15 and a second fixing nail 14 are fixedly provided on one side surface of the second fixing plate 12, one end of the fixing arm 15 is fixedly provided on the second fixing plate 12, and the other end of the fixing arm 15 extends in a direction away from the second fixing plate 12, specifically, the fixing arm 15 is arranged perpendicular to the second fixing plate 12, the fixing arm 15 is inserted in the through hole 9 and is fixed to the first fixing plate 7 by the screw 10, and the first fixing nail 8 and the second fixing nail 14 are arranged relatively.

[0049] like Fig.16As shown, the first fixing plate 7 and the second fixing plate 12 are respectively located on opposite sides of the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, such as the first fixing plate 7 is located on the left side of the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, and the second fixing plate 12 is located on the right side of the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17. The first fixing nails 8 on the first fixing plate 7 are respectively nailed on the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, and the second fixing nails 14 on the second fixing plate 12 are respectively nailed on the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, and the fixing arm 15 is located between the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17.

[0050] like Figure 6 , 7 As shown in , 8, 13, and 14, a lumbar fixation system in the utility model, wherein a screw seat 11 is fixedly provided on the other side surface of the first fixing plate 7, the screw seat 11 is provided with a threaded hole, the axis of the threaded hole is arranged along the radial direction of the through hole 9, and the screw 10 is threadedly connected in the threaded hole and abuts against the fixing arm 15.

[0051] The axis of the threaded hole is arranged along the radial direction of the through hole 9, so that when the screw 10 is rotated, the screw 10 can move closer to or away from the through hole 9. When the screw 10 moves closer to the through hole 9, it can abut against the fixed arm 15 inserted in the through hole 9.

[0052] In the lumbar fixation system of the present invention, the side surface of the fixing arm 15 that contacts the screw 10 is configured as an uneven anti-slip surface, such as Fig.11 , 14 As shown, the anti-slip surface is a striped surface, which can enhance the friction between the screw 10 and the fixing arm 15 , thereby enhancing the stability of the connection between the fixing arm 15 and the screw 10 .

[0053] The shape of the fixing arm 15 matches the shape of the through hole 9. Figure 5 , 8 As shown, the shape of the through hole 9 is rectangular, which matches this. Fig.12 As shown, the shape of the fixing arm 15 is a rectangular cylinder. In order to further reduce the weight of the interspinous process fixing device 26, a notch extending axially is provided on one side of the cylinder wall of the fixing arm 15.

[0054] like Fig. 9 , 12 As shown, in the lumbar fixation system of the present invention, the first fixation plate 7 and the second fixation plate 12 are both provided with weight-reducing holes 13. The interspinous process fixation device 26 is made of magnesium alloy, which has good compatibility with the human body and is absorbable, thereby avoiding secondary surgery.

[0055] When the utility model is in use, the left inferior articular process 22 of the upper vertebra 16 and the left superior articular process 21 of the lower vertebra 17 and the right inferior articular process 22 of the upper vertebra 16 and the right superior articular process 21 of the lower vertebra 17 are connected respectively by the lumbar facet joint fusion device 25 of the utility model. Before the connection, Fig.15 As shown, a file is first used to file off a portion of the inferior articular process 22 of the upper vertebral body 16 and the superior articular process 21 of the lower vertebral body 17, so that the gap 19 between the two can accommodate the fusion pieces 2, 29 of the lower fusion device 25 (when the fusion piece 2 is in the form of a plate, the gap 19 is a rectangular gap matching the plate-shaped fusion piece 2, such as Fig.15 As shown; when the fusion piece 29 is columnar, the gap 19 is a circular hole gap matching the columnar fusion piece 29), and at the same time, a punching tool is used to punch a first nail hole 18 on the inferior articular process 22 of the upper vertebra 16, and a second nail hole 20 is punched on the superior articular process 21 of the lower vertebra 17, and then the fusion device 25 is located at the rear side of the upper vertebra 16 and the lower vertebra 17, that is, the fusion plate 1 is located at the rear side of the inferior articular process 22 of the upper vertebra 16 and the superior articular process 21 of the lower vertebra 17, and the fusion pieces 2, 2 9 is inserted into the gap 19 between the inferior articular process 22 of the upper vertebra 16 and the superior articular process 21 of the lower vertebra 17. During the insertion process, the first fusion nail 3 is inserted into the first nail hole 18, and the second fusion nail 5 is inserted into the second nail hole 20 until the fusion plate 1 abuts against the inferior articular process 22 of the upper vertebra 16 and the superior articular process 21 of the lower vertebra 17. In this way, the inferior articular process 22 of the upper vertebra 16 and the superior articular process 21 of the lower vertebra 17 are connected together by the fusion device 25. Fig.16 shown.

[0056] The anti-slip structure on the fusion components 2, 29 (i.e., the anti-slip teeth 27 on the plate-like fusion component 2 and the anti-slip threads 30 on the columnar fusion component 29) can increase the friction between the fusion components 2, 29 and the inferior articular process 22 and the superior articular process 21, thereby preventing the fusion components 2, 29 from falling out between the two.

[0057] Since the first fusion nail 3 and the second fusion nail 5 are located on opposite sides of the fusion pieces 2 and 29 respectively, when the fusion pieces 2 and 29 are inserted into the gap 19 between the inferior articular process 22 and the superior articular process 21, the first fusion nail 3 can be inserted into the first nail hole 18 on the inferior articular process 22, and the second fusion nail 5 can be inserted into the second nail hole 20 on the superior articular process 21.

[0058] After the plate-like fusion component 2 is inserted into the gap 19 between the inferior articular process 22 and the superior articular process 21, the two side surfaces of the plate-like fusion component 2 are in contact with the inferior articular process 22 and the superior articular process 21 respectively, that is, the porous structures 28 on the two side surfaces are in contact with the inferior articular process 22 and the superior articular process 21 respectively, so that the porous structure 28 can promote bone growth and bone ingrowth, and enhance the fusion effect of the fusion device 25.

[0059] After the columnar fusion piece 29 is inserted into the gap 19 between the inferior articular process 22 and the superior articular process 21, the porous structure 28 on one side of the columnar fusion piece 29 arranged opposite to the first fusion nail 3 contacts the inferior articular process 22, and the porous structure 28 on the other side of the columnar fusion piece 29 arranged opposite to the second fusion nail 5 contacts the superior articular process 21. In this way, the porous structure 28 can promote bone growth and bone ingrowth, thereby enhancing the fusion effect of the fusion device 25.

[0060] The spinous process 24 of the upper vertebral body 16 and the spinous process 23 of the lower vertebral body 17 are connected by the interspinous process fixing device 26 of the utility model. Fig.16 As shown, the first fixing plate 7 and the second fixing plate 12 are respectively located on the left and right sides of the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, and the first fixing nail 8 on the first fixing plate 7 and the second fixing nail 14 on the second fixing plate 12 are arranged relatively, and then the fixing arm 15 on the second fixing plate 12 passes through between the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17 and is inserted into the through hole 9 of the first fixing plate 7, and then the first fixing plate 7 and the second fixing plate 12 are brought close to each other until the first fixing nail 8 on the first fixing plate 7 is They are respectively nailed to the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, and at the same time, the second fixing nail 14 on the second fixing plate 12 is also nailed to the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17, and then the screw 10 is rotated to make the screw 10 abut against the fixing arm 15, so as to fix the fixing arm 15 on the first fixing plate 7, that is, the relative positions of the first fixing plate 7 and the second fixing plate 12 are fixed, so that the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17 are connected through the interspinous process fixing device 26.

[0061] Since the inferior articular process 22 of the upper vertebra 16 and the superior articular process 21 of the lower vertebra 17 are connected by the fusion device 25 of the utility model, and the spinous process 24 of the upper vertebra 16 and the spinous process 23 of the lower vertebra 17 are connected by the interspinous process fixing device 26 of the utility model, that is, the upper vertebra 16 and the lower vertebra 17 can be fixed by the lumbar fixation system of the utility model, and when the fusion device 25 connects the inferior articular process 22 of the upper vertebra 16 and the superior articular process 21 of the lower vertebra 17, only a small part of the inferior articular process 22 and the superior articular process 21 is removed, and it is not necessary to completely remove the inferior articular process 22 and the superior articular process 21 as required in the prior art, so that the stability of the spine can be further enhanced by the use of the utility model. Based on the above analysis, the utility model can achieve the technical effect of low cost, low trauma, good effect and appropriate strength when intervening in advance to treat lumbar degenerative diseases.

[0062] like Fig.17 As shown, after the upper vertebral body 16 and the lower vertebral body 17 are fixed for a period of time by the lumbar fixation system of the present invention, the fusion device 25 and the interspinous process fixation device 26 in the lumbar fixation system are well fused with the vertebral bodies 16 and 17, achieving a good fixation effect.

[0063] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A lumbar facet joint fusion device, characterized by: The invention comprises a fusion plate, a fusion piece, a first fusion nail and a second fusion nail are fixedly arranged on one side of the fusion plate, one end of the fusion piece is fixedly arranged on the fusion plate, the other end of the fusion piece extends in a direction away from the fusion plate, the fusion piece is arranged perpendicular to the fusion plate, the first fusion nail and the second fusion nail are respectively located on opposite sides of the fusion piece, The fusion piece is in a plate shape, and is provided with a fusion hole penetrating two sides of the fusion piece, a porous structure is fixed in the fusion hole, the first fusion nail is arranged opposite to the porous structure on one side of the fusion piece, and the second fusion nail is arranged opposite to the porous structure on the other side of the fusion piece, or The fusion piece is columnar, and is provided with a fusion hole, which radially penetrates the fusion piece, and a porous structure is fixedly provided in the fusion hole, the first fusion nail is arranged opposite to the porous structure on one side of the fusion piece, and the second fusion nail is arranged opposite to the porous structure on the other side of the fusion piece.

2. The lumbar facet joint fusion device according to claim 1, characterized in that: When the fusion piece is in a plate shape, anti-slip teeth are fixedly provided on both side surfaces of the fusion piece.

3. The lumbar facet joint fusion device according to claim 1, characterized in that: When the fusion piece is in a columnar shape, an anti-slip thread is fixedly provided on the outer circumferential side wall of the fusion piece.

4. The lumbar facet joint fusion device according to claim 2 or 3, characterized in that: The first fusion nail and the second fusion nail are both conical in shape. The large diameter end of the first fusion nail is fixed on the fusion plate, and the small diameter end of the first fusion nail extends away from the fusion plate. The large diameter end of the second fusion nail is fixed on the fusion plate, and the small diameter end of the second fusion nail extends away from the fusion plate.

5. The lumbar facet joint fusion device according to claim 4, characterized in that: A first barb is fixedly provided on the first fusion nail, one end of which is fixedly provided on the outer peripheral side wall of the first fusion nail, and the other end of which extends toward the large diameter end of the first fusion nail. A second barb is fixedly provided on the second fusion nail, one end of which is fixedly provided on the outer peripheral side wall of the second fusion nail, and the other end of which extends toward the large diameter end of the second fusion nail.

6. The lumbar facet joint fusion device according to claim 5, characterized in that: The first barbs are arranged in multiple groups, the number of first barbs in each group is set to multiple, the multiple groups of first barbs are evenly arranged along the axial direction of the first fusion nail, and each group of first barbs is evenly arranged along the circumference of the first fusion nail; the second barbs are arranged in multiple groups, the number of second barbs in each group is set to multiple, the multiple groups of second barbs are evenly arranged along the axial direction of the second fusion nail, and each group of second barbs is evenly arranged along the circumference of the second fusion nail.

7. The lumbar facet joint fusion device according to claim 1, characterized in that: The number of the first fusion nail and the second fusion nail is set to one, and the fusion plate, the fusion piece, the first fusion nail and the second fusion nail are all made of magnesium alloy.

8. A lumbar fixation system using the lumbar facet joint fusion device according to any one of claims 1 to 7, characterized in that: It comprises an interspinous process fixing device for connecting the spinous process of the upper vertebra and the spinous process of the lower vertebra; the lumbar facet joint fusion device is used to connect the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra; the fusion plate is located at the posterior side of the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra; the fusion piece is located between the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra; the first fusion nail and the second fusion nail are nailed on the inferior articular process of the upper vertebra and the superior articular process of the lower vertebra, respectively.

9. The lumbar fixation system according to claim 8, characterized in that: The interspinous process fixing device includes a first fixing plate and a second fixing plate, wherein the first fixing plate is provided with a through hole, the through hole passes through two side surfaces of the first fixing plate, a first fixing nail is fixedly provided on one side surface of the first fixing plate, a screw is provided on the other side surface of the first fixing plate, a fixing arm and a second fixing nail are fixedly provided on one side surface of the second fixing plate, one end of the fixing arm is fixedly provided on the second fixing plate, the other end of the fixing arm extends in a direction away from the second fixing plate, the fixing arm is inserted in the through hole and fixed to the first fixing plate by screws, the first fixing nail and the second fixing nail are arranged relative to each other, the first fixing plate and the second fixing plate are respectively located on opposite sides of the upper vertebral spinous process and the lower vertebral spinous process, the first fixing nail on the first fixing plate is respectively nailed on the upper vertebral spinous process and the lower vertebral spinous process, and the second fixing nail on the second fixing plate is respectively nailed on the upper vertebral spinous process and the lower vertebral spinous process, and the fixing arm is located between the upper vertebral spinous process and the lower vertebral spinous process.

10. The lumbar fixation system according to claim 9, characterized in that: A screw seat is fixedly provided on the other side surface of the first fixing plate, and a threaded hole is provided on the screw seat. The axis of the threaded hole is arranged along the radial direction of the through hole. The screw is threadedly connected in the threaded hole and abuts against the fixing arm. The side of the fixing arm abutting against the screw is set as an uneven anti-slip surface. The shape of the fixing arm matches the shape of the through hole. Weight reduction holes are provided on both the first fixing plate and the second fixing plate, and the interspinous process fixing device is made of magnesium alloy.

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