Inter-spinous-process distraction fixing device
By designing an interspinous fixation device with adjustable opening size, the problem of secondary damage to the spine during implantation was solved, achieving a safe and stable implantation effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGZHOU GEASURE MEDICAL DEVICES CO LTD
- Filing Date
- 2026-03-12
- Publication Date
- 2026-04-24
AI Technical Summary
Existing interspinous fixation devices require separating adjacent spinous processes during implantation, which may lead to secondary spinal injury.
A spinous process-openable fixation device was designed. It is achieved by inserting and sliding a first fixation plate and a second fixation plate. The opening size is adjusted by the first locking member and the second locking member to ensure that the implantation process does not cause secondary damage to the spine.
This allows for adjustment of the expansion size based on the spacing when implanting between adjacent spinous processes, avoiding secondary spinal injury and ensuring the stability and safety of the implant.
Smart Images
Figure CN121910458A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medical devices, and in particular to a spinous process-openable fixation device. Background Technology
[0002] Interspinous process fixation devices are part of the spinal internal fixation system. They can be used alone as "internal traction" or in conjunction with various surgical procedures such as precise decompression, percutaneous endoscopic discectomy, interbody fusion, and MED. They are also highly effective for "difficult cases" such as topping-off discectomy, playing a significant role at multiple levels of stepwise treatment. Interspinous process fixation devices reduce tension in the posterior annulus fibrosus by traction on the posterior spinous process tissue, thus reducing the incidence of discogenic low back pain. Loss of intervertebral disc height is a common manifestation of intervertebral disc degeneration. Restoring intervertebral height through intervertebral implants or artificial discs during treatment can effectively improve symptoms, prevent mechanical stimulation of pain nerve endings due to reduced tension in the posterior annulus fibrosus, and alleviate postoperative pain. Interspinous process fixation can effectively reduce intradiscal pressure, decreasing it by 43.63% in hyperflexion, 40.41% in neutral position, and 17.38% in hyperextension, thereby achieving the therapeutic goal.
[0003] Currently, the interspinous fixation devices used in clinical practice are generally specific opening structures. Before implantation, if the distance between two adjacent spinous processes is too small, the surgeon needs to open the two spinous processes to increase the distance between them so that the interspinous fixation device can be implanted. This may cause secondary damage to the spine. Summary of the Invention
[0004] The purpose of this invention is to provide an interspinous process expandable fixation device that, when implanted between two adjacent spinous processes, can adjust its expansion size according to the distance between the two adjacent spinous processes, and complete the implantation without causing secondary damage to the spine.
[0005] The present invention provides a spindle-shaped interproximal expansion and fixing device, comprising a first fixing plate and a second fixing plate arranged opposite each other and both vertically. The first fixing plate includes a first first fixing plate and a first second fixing plate capable of moving closer to or further away from each other. The first first fixing plate and the first second fixing plate are fixed together by a first locking member. The second fixing plate includes a second first fixing plate and a second second fixing plate capable of moving closer to or further away from each other. A first support plate and a second support plate extending toward the second fixing plate are respectively fixed on the first first fixing plate and the first second fixing plate. The second first fixing plate and the second second fixing plate are slidably sleeved on the first support plate and the second support plate, respectively. The second first fixing plate and the second second fixing plate, as well as the second fixing plate and the two support plates, are fixed together by a second locking member.
[0006] The present invention provides a spindle-shaped interproximal expansion and fixing device, wherein the first fixing plate and the first and second fixing plates are slidably connected by insertion, and the second fixing plate and the second fixing plate are slidably connected by insertion.
[0007] The present invention provides a spindle-shaped opening and fixing device, wherein a first insert is fixedly provided on the side of the first fixing plate near the first and second fixing plates, and a first slot matching the first insert is provided on the side of the first and second fixing plates near the first fixing plate. The first insert is inserted into the first slot, and the first and second fixing plates can slide closer to or further away from each other through the first insert and the first slot. The first locking member is a first screw, and the first and second fixing plates are provided with a first threaded hole communicating with the first slot. The first screw is threadedly connected in the first threaded hole and abuts against the first insert.
[0008] The present invention provides a spindle-shaped opening and fixing device, wherein a first insert is fixedly provided on the side of the first and second fixing plates near the first fixing plate, and a first slot matching the first insert is provided on the side of the first fixing plate near the first and second fixing plates. The first insert is inserted into the first slot, and the first and second fixing plates can slide closer to or further away from each other through the first insert and the first slot. The first locking member is a first screw, and the first fixing plate is provided with a first threaded hole communicating with the first slot. The first screw is threadedly connected in the first threaded hole and abuts against the first insert.
[0009] The present invention provides a spindle-shaped, expandable fixing device, wherein a second insert is fixedly provided on the side of the second first fixing plate near the second second fixing plate, and a second slot matching the second insert is provided on the side of the second second fixing plate near the second first fixing plate. The second insert is inserted into the second slot, and the second first fixing plate and the second second fixing plate can slide closer to or further away from each other through the second insert and the second slot. The second second fixing plate is provided with a second sliding hole matching the second support plate, and the second second fixing plate is slidably fitted onto the second support plate through the second sliding hole. The second second fixing plate is provided with a second threaded hole communicating with the second slot, and the second slot is communicating with the second sliding hole. The second locking member is a second screw, which is threadedly connected to the second threaded hole and abuts against the second insert. The second insert abuts against the second support plate under the action of the second screw.
[0010] The present invention provides a spindle-shaped opening and fixing device, wherein a second insert is fixedly provided on the side of the second fixing plate near the second fixing plate, and a second slot matching the second insert is provided on the side of the second fixing plate near the second fixing plate. The second insert is inserted into the second slot, and the second fixing plate and the second fixing plate can slide closer or further apart through the second insert and the second slot. The second fixing plate is provided with a first sliding hole matching the first support plate, and the second fixing plate is slidably sleeved on the first support plate through the first sliding hole. The second fixing plate is provided with a second threaded hole communicating with the second slot, and the second slot communicating with the first sliding hole. The second locking member is a second screw, which is threadedly connected in the second threaded hole and abuts against the second insert. The second insert abuts against the first support plate under the action of the second screw.
[0011] The present invention provides a spindle-openable fixing device, wherein the lower side of the first fixing plate near the second fixing plate is an arc-shaped convex surface that gradually moves away from the second fixing plate from top to bottom; the lower side of the second fixing plate near the first fixing plate is an arc-shaped convex surface that gradually moves away from the first fixing plate from top to bottom; the lower side of the first and second fixing plates near the second fixing plate is an arc-shaped convex surface that gradually moves away from the second fixing plate from top to bottom; and the lower side of the second fixing plate near the first fixing plate is an arc-shaped convex surface that gradually moves away from the first fixing plate from top to bottom.
[0012] The present invention provides a spindle-openable fixing device, wherein a protruding nail is fixedly provided on the side of the first fixing plate near the second fixing plate, a protruding nail is fixedly provided on the side of the second fixing plate near the first fixing plate, a protruding nail is fixedly provided on the side of the first fixing plate near the second fixing plate, and a protruding nail is fixedly provided on the side of the second fixing plate near the first fixing plate.
[0013] The difference between this invention and the prior art lies in the fact that, when this invention is used, if the distance between two adjacent spinous processes is too small, the first fixing plate and the second fixing plate in the first fixing plate move closer to each other. Then, the first support plate and the second support plate, respectively fixed to the first fixing plate and the second fixing plate, also move closer to each other until the two support plates can pass through the space between the two adjacent spinous processes. Afterward, the first fixing plate is placed on one side of the spine, and then the two support plates pass through the space between the two adjacent spinous processes from one side of the spine and out to the other side of the spine. Then, the first fixing plate and the second fixing plate move away from each other, and the first support plate and the second support plate also move away from each other until they respectively abut against the two adjacent spinous processes. Then, the two support plates continue to move away from each other until the distance between the two adjacent spinous processes is widened to meet the requirements. The first locking member then fixes the relative positions of the first and second fixing plates. Next, the second fixing plates are moved closer to or further apart to align the distance between them with the distance between the first and second support plates. Then, the second fixing plates are respectively fitted onto the first and second support plates from the other side of the spine, allowing them to slide along the two support plates until they abut against the opposite sides of the two adjacent spinous processes. Finally, the second locking member fixes the relative positions of the second fixing plates and the two support plates. In other words, the first and second fixing plates, the two support plates, and the second fixing plate are fixed together as a single unit by the first and second locking members. This single unit is fixed to the two adjacent spinous processes, thus achieving the opening and fixing of the two adjacent spinous processes. Therefore, it can be seen that when the present invention is implanted between two adjacent spinous processes, it can adjust its own expansion size according to the distance between the two adjacent spinous processes, and complete the implantation without causing secondary damage to the spine.
[0014] The invention will now be further described with reference to the accompanying drawings. Attached Figure Description
[0015] Figure 1 This is a front view of the interspinous expandable fixing device of the present invention; Figure 2 This is a left view of the interspinous expansion and fixing device of the present invention; Figure 3 This is a right view of the interspinous expandable fixing device of the present invention; Figure 4 This is a top view of the interspinous splinter-like fixation device of the present invention; Figure 5 This is a front view of the first fixing plate in this invention; Figure 6 This is a rear view of the first fixing plate in this invention; Figure 7 This is a front view of the second fixing plate in this invention; Figure 8 This is a rear view of the second fixing plate in this invention; Figure 9 This is a front view of the first fixing plate in this invention; Figure 10 This is a left view of the first fixing plate in this invention; Figure 11 This is a right view of the first fixing plate in this invention; Figure 12 This is a top view of the first fixing plate in this invention; Figure 13 This is a front view of the first and second fixing plates in this invention; Figure 14 This is a left view of the first and second fixing plates in this invention; Figure 15 This is a right view of the first and second fixing plates in this invention; Figure 16 This is a top view of the first and second fixing plates in this invention; Figure 17 This is a front view of the second fixing plate in this invention; Figure 18 This is a left view of the second fixing plate in this invention; Figure 19 This is a right view of the second fixing plate in this invention; Figure 20 This is a top view of the second fixing plate in this invention; Figure 21 This is a front view of the second fixing plate in this invention; Figure 22 This is a partial front sectional view of the second fixing plate in this invention; Figure 23 This is a left view of the second fixing plate in this invention; Figure 24 This is a right view of the second fixing plate in this invention; Figure 25 This is a top view of the second fixing plate in this invention; Figure 26 This is a diagram showing the usage state of the interspinous expansion and fixing device of the present invention.
[0016] Figure reference numerals: 01. Second fixing plate; 02. Second fixing plate; 03. First support plate; 04. Second support plate; 05. First sliding hole; 06. Second sliding hole; 07. First insert block; 08. Second insert block; 09. First screw; 10. Second screw; 11. Protruding nail; 12. First fixing plate; 13. First fixing plate; 14. First threaded hole; 15. First slot; 16. Second threaded hole; 17. Second slot; 18. Rattling protrusion. Detailed Implementation
[0017] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.
[0018] like Figure 1 As shown, and in combination Figure 2-25 As shown, the interspinous propeller-opening fixing device of the present invention includes a first fixing plate and a second fixing plate arranged opposite each other and both vertically. The first fixing plate includes a first fixing plate 12 and a first fixing plate 13 that can move closer or further apart from each other. The first fixing plate 12 and the first fixing plate 13 are fixed together by a first locking member. The second fixing plate includes a second fixing plate 01 and a second fixing plate 02 that can move closer or further apart from each other. A first support plate 03 and a second support plate 04 extending toward the second fixing plate are respectively fixed on the first fixing plate 12 and the first fixing plate 13. The second fixing plate 01 and the second fixing plate 02 are slidably sleeved on the first support plate 03 and the second support plate 04, respectively. The second fixing plate 01 and the second fixing plate 02, as well as the second fixing plate and the two support plates, are fixed together by a second locking member.
[0019] The first fixing plate 12, the first second fixing plate 13, the second first fixing plate 01, and the second second fixing plate 02 are all arranged vertically. The first fixing plate 12 and the second first fixing plate 01 are arranged opposite each other (the first fixing plate 12 is parallel to the second first fixing plate 01), and the first second fixing plate 13 and the second second fixing plate 02 are arranged opposite each other (the first second fixing plate 13 is parallel to the second second fixing plate 02). A first support plate 03 extending toward the second fixing plate 01 (i.e., extending toward the second fixing plate as described above) is fixed on the first fixing plate 12. The first support plate 03 is arranged vertically and perpendicular to the first fixing plate 12 and the second fixing plate 01. The second fixing plate 01 is slidably sleeved on the first support plate 03 and can slide along the first support plate 03 toward or away from the first fixing plate 12. A second support plate 04 is fixedly provided on the first second fixed plate 13, extending toward the second second fixed plate 02 (i.e., extending toward the second fixed plate as described above). The second support plate 04 is arranged vertically and is opposite to and parallel to the first support plate 03. The second support plate 04 is perpendicular to the first second fixed plate 13 and the second second fixed plate 02. The second second fixed plate 02 is slidably sleeved on the second support plate 04. The second second fixed plate 02 can slide along the second support plate 04 toward or away from the first second fixed plate 13.
[0020] The present invention provides a spindle-shaped interproximal expansion and fixing device, wherein the first fixing plate 12 and the first second fixing plate 13 are slidably connected by insertion, and the second first fixing plate 01 and the second second fixing plate 02 are slidably connected by insertion.
[0021] Since the first fixing plate 12 and the first second fixing plate 13 are slidably connected by plugging, the first fixing plate 12 and the first second fixing plate 13 can slide closer to each other or further away (that is, the two can move closer to each other or further away). Therefore, the first support plate 03 and the second support plate 04, which are respectively fixed on the first fixing plate 12 and the first second fixing plate 13, also move closer to each other or further away.
[0022] Since the second fixing plate 01 and the second fixing plate 02 are slidably connected by plugging, the second fixing plate 01 and the second fixing plate 02 can slide closer to each other or further away (that is, the two can move closer to each other or further away) to adapt to the distance between the two support plates. In this way, the second fixing plate 01 and the second fixing plate 02 can be respectively fitted onto the first support plate 03 and the second support plate 04.
[0023] like Figure 5 As shown, and in combination Figure 6 , 9As shown in Figures 11, 12, and 13-16, the present invention provides a spindle-openable fixing device. A first insert 07 is fixedly provided on the side of the first fixing plate 12 near the first second fixing plate 13. A first slot 15 matching the first insert 07 is provided on the side of the first second fixing plate 13 near the first fixing plate 12. The first insert 07 is inserted into the first slot 15. The first fixing plate 12 and the first second fixing plate 13 can slide closer to or further away from each other via the first insert 07 and the first slot 15. When the first fixing plate 12 and the first fixing plate 13 slide closer to each other, the first insert 07 slides from the outside to the inside into the first slot 15. Conversely, when the first fixing plate 12 and the first fixing plate 13 slide away from each other, the first insert 07 slides from the inside to the outside out of the first slot 15. The first locking element is the first screw 09. The first fixing plate 13 is provided with a first threaded hole 14 that communicates with the first slot 15. The first screw 09 is threadedly connected in the first threaded hole 14 and abuts against the first insert 07.
[0024] The first threaded hole 14 is located on the upper side of the first and second fixing plates 13. The first threaded hole 14 extends downward and communicates with the first slot 15, that is, the first slot 15 is located below the first threaded hole 14. The first screw 09 is threaded into the first threaded hole 14. When the first screw 09 is loosened outward and separated from the first insert 07, the first fixing plate 12 and the first and second fixing plates 13 can slide closer or further apart. Conversely, when the first screw 09 is tightened inward and abuts against the first insert 07, the first insert 07 can no longer slide along the first slot 15 due to the restriction of the first screw 09, that is, the relative positions of the first fixing plate 12 and the first and second fixing plates 13 are fixed.
[0025] Of course, in addition to the above-mentioned insertion method of the first fixing plate 12 and the first fixing plate 13, the installation positions of the first insert 07 and the first slot 15 can also be interchanged. Specifically, the first insert 07 is fixedly provided on the side of the first fixing plate 13 near the first fixing plate 12, and the first fixing plate 12 is provided on the side near the first fixing plate 13, which is matched with the first insert 07. The first insert 07 is inserted into the first slot 15. The first fixing plate 12 and the first fixing plate 13 can slide closer or further apart through the first insert 07 and the first slot 15. The first locking element is the first screw 09. The first fixing plate 12 is provided with a first threaded hole 14 communicating with the first slot 15. The first screw 09 is threaded into the first threaded hole 14 and abuts against the first insert 07. The first threaded hole 14 is located on the upper side of the first fixing plate 12 and extends downward to communicate with the first slot 15, that is, the first slot 15 is located below the first threaded hole 14.
[0026] like Figure 7 As shown, and in combination Figure 8 , 17 As shown in Figures 19-25, the present invention provides a spindle-openable fixing device. A second insert 08 is fixedly provided on the side of the second fixing plate 01 near the second fixing plate 02. A second slot 17 matching the second insert 08 is provided on the side of the second fixing plate 02 near the second fixing plate 01. The second insert 08 is inserted into the second slot 17. The second fixing plate 01 and the second fixing plate 02 can slide closer to or further away from each other via the second insert 08 and the second slot 17 (i.e., when the second fixing plate 01 and the second fixing plate 02 slide closer to each other, the second insert 08 slides from the outside to the inside into the second slot 17; conversely ... When the plate 01 and the second fixing plate 02 slide away from each other, the second insert 08 slides out of the second slot 17 from the inside. The second fixing plate 02 is provided with a second sliding hole 06 that matches the second support plate 04. The second fixing plate 02 is slidably sleeved on the second support plate 04 through the second sliding hole 06. The second fixing plate 02 is provided with a second threaded hole 16 that communicates with the second slot 17. The second slot 17 communicates with the second sliding hole 06. The second locking member is a second screw 10. The second screw 10 is threaded in the second threaded hole 16 and abuts against the second insert 08. The second insert 08 abuts against the second support plate 04 under the action of the second screw 10.
[0027] The second threaded hole 16 is located on the upper side of the second fixing plate 02. The second threaded hole 16 extends downward and communicates with the second slot 17, that is, the second slot 17 is located below the second threaded hole 16. The second sliding hole 06 is located below the second slot 17, and the two are connected. The second screw 10 is threaded in the second threaded hole 16. When the second screw 10 is loosened outward and separated from the second insert block 08, the second fixing plate 01 and the second fixing plate 02 can slide closer to or further away from each other. And since the second insert block 08 is inserted into the second slot 17, the second fixing plate 01 and the second fixing plate 02 can slide together (i.e., the second fixing plate) along the two support plates closer to or further away from the first fixing plate (i.e., the first fixing plate 12 and the first fixing plate 13). Conversely, when the second screw 10 is tightened inward and abuts against the second insert 08, simultaneously, under the downward pushing action of the second screw 10, the second insert 08 abuts against the second support plate 04 (i.e., the two are pressed together), so that the lower side of the second support plate 04 also abuts against the second sliding hole 06 of the second fixing plate 02. At this time, under the restriction of the second screw 10, the second insert 08 can no longer slide along the second slot 17, and the second fixing plate 02 can no longer slide along the second support plate 04. That is, the second fixing plate can no longer slide along the two support plates, which means that the relative position between the second fixing plate 01 and the second fixing plate 02, as well as the relative position between the second fixing plate and the two support plates, is fixed.
[0028] Of course, in addition to the above-mentioned insertion method of the second fixing plate 01 and the second fixing plate 02, the installation positions of the second insert 08 and the second slot 17 can also be interchanged. Specifically, the second insert 08 is fixedly provided on the side of the second fixing plate 02 near the second fixing plate 01, and the second fixing plate 01 is provided on the side of the second fixing plate 01 near the second fixing plate 02, with a second slot 17 matching the second insert 08. The second insert 08 is inserted into the second slot 17, and the second fixing plate 01 and the second fixing plate 02 can be connected through the second insert 08 and the second slot 17. The second fixed plate 01 slides closer to or further away from the first support plate 03, with a first sliding hole 05 matching the first support plate 03. The second fixed plate 01 is slidably fitted onto the first support plate 03 through the first sliding hole 05. The second fixed plate 01 has a second threaded hole 16 communicating with the second slot 17. The second slot 17 communicates with the first sliding hole 05. The second locking element is a second screw 10, which is threaded into the second threaded hole 16 and abuts against the second insert 08. The second insert 08 abuts against the first support plate 03 under the action of the second screw 10. The second threaded hole 16 is located on the upper side of the second fixed plate 01 and extends downward to communicate with the second slot 17, meaning the second slot 17 is located below the second threaded hole 16. The first sliding hole 05 is located below the second slot 17, and the two are connected.
[0029] In this invention, regardless of the insertion method of the second fixing plate 01 and the second fixing plate 02, the second fixing plate 01 is slidably fitted onto the first support plate 03 through its first sliding hole 05, and the second fixing plate 02 is slidably fitted onto the second support plate 04 through its second sliding hole 06. Thus, when there is no insertion relationship between the second fixing plate 01 and the second fixing plate 02, the second fixing plate 01 and the second fixing plate 02 can slide along the first support plate 03 and the second support plate 04 respectively, to move closer to or away from the first fixing plate 12 and the first fixing plate 13; when there is an insertion relationship between the second fixing plate 01 and the second fixing plate 02 (i.e., the second insert 08 is inserted into the second slot 17), the second fixing plate 01 and the second fixing plate 02 can slide together along the two support plates, to move closer to or away from the first fixing plate 12 and the first fixing plate 13.
[0030] like Figure 2 , 3As shown in Figures 5, 8-11, 13-15, 18, 19, 23, and 24, the present invention has a spindle-shaped opening and fixing device. The lower side of the first fixing plate 12 near the second fixing plate 01 has an arc-shaped convex surface that gradually moves away from the second fixing plate 01 from top to bottom. The lower side of the second fixing plate 01 near the first fixing plate 12 has an arc-shaped convex surface that gradually moves away from the first fixing plate 12 from top to bottom. The lower side of the first fixing plate 13 near the second fixing plate 02 has an arc-shaped convex surface that gradually moves away from the second fixing plate 02 from top to bottom. The lower side of the second fixing plate 02 near the first fixing plate 13 has an arc-shaped convex surface that gradually moves away from the first fixing plate 13 from top to bottom.
[0031] In other words, the two opposite sides of the first and second fixing plates are provided with arc-shaped convex surfaces that gradually move away from each other from top to bottom. The reason for this arrangement is that when the invention is in use, the two opposite sides of the first and second fixing plates abut against the opposite sides (i.e., the left and right sides) of the spur 18, and the upper ends of the first and second fixing plates are arranged near the end of the spur 18, and the lower ends are arranged near the root of the spur 18. Since the root of the spur 18 is an arc-shaped concave surface, the two opposite sides of the first and second fixing plates are provided with arc-shaped convex surfaces that match the shape of the root of the spur 18, so that the invention can be more firmly fixed to the spur 18 without causing any damage to the spur 18.
[0032] like Figure 2-5 As shown in Figures 8-16, 18-20, and 23-25, the present invention has a spindle-openable fixing device, wherein a protruding nail 11 is fixedly provided on the side of the first fixing plate 12 near the second fixing plate 01, a protruding nail 11 is fixedly provided on the side of the second fixing plate 01 near the first fixing plate 12, a protruding nail 11 is fixedly provided on the side of the first fixing plate 13 near the second fixing plate 02, and a protruding nail 11 is fixedly provided on the side of the second fixing plate 02 near the first fixing plate 13.
[0033] In other words, protruding nails 11 are fixed on both opposite sides of the first fixing plate and the second fixing plate. The purpose of this is to enhance the biting force between the nail and the spinous process 18 when fixing it, so that the present invention can be more firmly fixed on the spinous process 18.
[0034] like Figure 9 , 12 As shown, and in combination Figure 4 , 5 As shown in Figure 6, in order to enhance the fastening force between the first screw 09 and the first insert 07, anti-slip teeth are provided on the side (i.e. the upper side) of the first insert 07 that abuts against the first screw 09.
[0035] like Figure 14 , 15 As shown, and in combination Figure 3 As shown, in order to enhance the fastening force between the second support plate 04 and the second fixing plate 02, anti-slip teeth are provided on the side (i.e. the lower side) of the second support plate 04 that abuts against the second fixing plate 02.
[0036] like Figure 17 , 20 As shown, and in combination Figure 1 , 4 As shown in Figures 7 and 8, in order to enhance the fastening force between the second insert 08 and the second screw 10, anti-slip teeth are provided on the side (i.e. the upper side) of the second insert 08 that abuts against the second screw 10.
[0037] like Figure 4 As shown, when the first insert 07 is inserted into the first slot 15, the second insert 08 is inserted into the second slot 17, and the second first fixing plate 01 and the second second fixing plate 02 are respectively sleeved on the first support plate 03 and the second support plate 04, the first first fixing plate 12 and the second first fixing plate 01 are arranged opposite to each other, the first second fixing plate 13 and the second second fixing plate 02 are arranged opposite to each other, the first support plate 03 and the second support plate 04 are arranged opposite to each other, and the first insert 07 and the second insert 08 are arranged opposite to each other.
[0038] like Figure 4 , 6 As shown in Figure 12, in order to facilitate the opening operation of the present invention during use, a vertically arranged strip tooth is provided on the side of the first insert 07 away from the second insert 08 (i.e. the side away from the second fixed plate, or the outer vertical surface). The strip tooth can mesh with the gear in the existing opening device, and the present invention is driven to open (i.e. the two support plates move away from each other) by turning the gear in the opening operation device.
[0039] Of course, if the vertically arranged strip teeth are not provided on the first insert block 07, the present invention can also be opened using the existing clamping device.
[0040] like Figure 26As shown, the difference between this invention and the prior art lies in the fact that, during use, if the distance between two adjacent spinous processes 18 is too small, the first fixing plate 12 and the first fixing plate 13 in the first fixing plate move closer to each other. That is, the first fixing plate 12 and the first fixing plate 13 slide closer to each other through the first insert 07 and the first slot 15. Then, the first support plate 03 and the second support plate 04, respectively fixed on the first fixing plate 12 and the first fixing plate 13, also move closer to each other until the two support plates can pass through the space between two adjacent spinous processes 18. Afterwards, the first fixing plate is placed on the spine. On one side (left side), the two support plates pass through the space between two adjacent spinous processes 18 from one side (left side) of the spine and out to the other side (right side) of the spine. Then, the first fixation plate 12 and the first fixation plate 13 move away from each other, that is, the first fixation plate 12 and the first fixation plate 13 slide away from each other through the first insert block 07 and the first slot 15. Then, the first support plate 03 and the second support plate 04 also move away from each other until they abut against the two adjacent spinous processes 18 respectively. Then, the two support plates continue to move away from each other until the distance between the two adjacent spinous processes 18 is widened to meet the requirements. Then, the relative positions of the first fixing plate 12 and the first second fixing plate 13 are fixed by the first locking member. Next, the second fixing plate 01 and the second fixing plate 02 in the second fixing plate are allowed to move closer or further apart, that is, the second fixing plate 01 and the second fixing plate 02 slide closer or further apart through the second insert block 08 and the second slot 17, so that the distance between the second fixing plate 01 and the second fixing plate 02 is adapted to the distance between the first support plate 03 and the second support plate 04. Then, the second fixing plate 01 and the second fixing plate 02 are... 02. From the other side (right side) of the spine, the first support plate 03 and the second support plate 04 are respectively fitted onto them. The second fixation plate 01 and the second fixation plate 02 slide along the two support plates close to the first fixation plate 12 and the first fixation plate 13 until the opposite sides of the first fixation plate and the second fixation plate abut against the opposite sides (left and right sides) of the two adjacent spinous processes 18. Finally, the relative positions between the second fixation plate 01 and the second fixation plate 02, as well as the relative positions between the second fixation plate and the two support plates, are fixed by the second locking member. That is, the first fixation plate 12, the first fixation plate 13, the two support plates, the second fixation plate 01 and the second fixation plate 02 are fixedly connected into an integral structure by the first and second locking members. This integral structure is fixed on the two adjacent spinous processes 18, thereby completing the opening and fixation of the two adjacent spinous processes 18. It can be seen that when implanted between two adjacent spinous processes 18, the present invention can adjust its own opening size according to the distance between the two adjacent spinous processes 18, and complete the implantation without causing secondary damage to the spine.
[0041] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A splinter-like fixation device, characterized in that: The device includes a first fixing plate and a second fixing plate arranged vertically opposite to each other. The first fixing plate includes a first first fixing plate and a first second fixing plate that can move closer to or further away from each other. The first first fixing plate and the first second fixing plate are fixed together by a first locking member. The second fixing plate includes a second first fixing plate and a second second fixing plate that can move closer to or further away from each other. A first support plate and a second support plate extending toward the second fixing plate are respectively fixed on the first first fixing plate and the first second fixing plate. The second first fixing plate and the second second fixing plate are respectively slidably sleeved on the first support plate and the second support plate. The second first fixing plate and the second second fixing plate, as well as the second fixing plate and the two support plates, are fixed together by a second locking member.
2. The interspinous propulsion fixing device according to claim 1, characterized in that: The first fixing plate and the first and second fixing plates are slidably connected by plugging in each other. The second fixing plate and the second fixing plate are also slidably connected by plugging in each other.
3. The interspinous propulsion fixing device according to claim 2, characterized in that: A first insert block is fixedly provided on the side of the first fixed plate near the first and second fixed plates. A first slot matching the first insert block is provided on the side of the first fixed plate near the first fixed plate. The first insert block is inserted into the first slot. The first fixed plate and the first and second fixed plates can slide closer or further apart through the first insert block and the first slot. The first locking member is a first screw. A first threaded hole communicating with the first slot is provided on the first and second fixed plates. The first screw is threadedly connected in the first threaded hole and abuts against the first insert block.
4. The interspinous propulsion fixing device according to claim 2, characterized in that: A first insert block is fixedly provided on the side of the first and second fixing plates near the first fixing plate. A first slot matching the first insert block is provided on the side of the first fixing plate near the first and second fixing plates. The first insert block is inserted into the first slot. The first fixing plate and the first and second fixing plates can slide closer or further apart through the first insert block and the first slot. The first locking member is a first screw. A first threaded hole communicating with the first slot is provided on the first fixing plate. The first screw is threadedly connected in the first threaded hole and abuts against the first insert block.
5. The interspinous propulsion fixing device according to claim 3 or 4, characterized in that: A second insert block is fixedly provided on the side of the second first fixing plate near the second second fixing plate. A second slot matching the second insert block is provided on the side of the second second fixing plate near the second first fixing plate. The second insert block is inserted into the second slot. The second first fixing plate and the second second fixing plate can slide closer or further apart through the second insert block and the second slot. A second sliding hole matching the second support plate is provided on the second second fixing plate. The second second fixing plate is slidably sleeved on the second support plate through the second sliding hole. A second threaded hole communicating with the second slot is provided on the second second fixing plate. The second slot is communicating with the second sliding hole. The second locking member is a second screw. The second screw is threadedly connected in the second threaded hole and abuts against the second insert block. The second insert block abuts against the second support plate under the action of the second screw.
6. The interspinous propulsion fixing device according to claim 3 or 4, characterized in that: A second insert block is fixedly provided on the side of the second fixed plate near the second fixed plate. A second slot matching the second insert block is provided on the side of the second fixed plate near the second fixed plate. The second insert block is inserted into the second slot. The second fixed plate and the second fixed plate can slide closer or further apart through the second insert block and the second slot. The second fixed plate is provided with a first sliding hole matching the first support plate. The second fixed plate is slidably fitted onto the first support plate through the first sliding hole. The second fixed plate is provided with a second threaded hole communicating with the second slot. The second slot is communicating with the first sliding hole. The second locking element is a second screw. The second screw is threadedly connected to the second threaded hole and abuts against the second insert block. The second insert block abuts against the first support plate under the action of the second screw.
7. The interspinous propulsion fixing device according to claim 5, characterized in that: The lower side of the first fixing plate near the second fixing plate is an arc-shaped convex surface that gradually moves away from the second fixing plate from top to bottom. The lower side of the second fixing plate near the first fixing plate is an arc-shaped convex surface that gradually moves away from the first fixing plate from top to bottom. The lower side of the first and second fixing plates near the second fixing plate is an arc-shaped convex surface that gradually moves away from the second fixing plate from top to bottom.
8. The interspinous propulsion fixing device according to claim 5, characterized in that: A protruding nail is fixedly provided on the side of the first fixing plate near the second fixing plate, a protruding nail is fixedly provided on the side of the second fixing plate near the first fixing plate, a protruding nail is fixedly provided on the side of the first fixing plate near the second fixing plate, and a protruding nail is fixedly provided on the side of the second fixing plate near the first fixing plate.
9. The interspinous propulsion fixing device according to claim 6, characterized in that: The lower side of the first fixing plate near the second fixing plate is an arc-shaped convex surface that gradually moves away from the second fixing plate from top to bottom. The lower side of the second fixing plate near the first fixing plate is an arc-shaped convex surface that gradually moves away from the first fixing plate from top to bottom. The lower side of the first and second fixing plates near the second fixing plate is an arc-shaped convex surface that gradually moves away from the second fixing plate from top to bottom.
10. The interspinous propulsion fixing device according to claim 6, characterized in that: A protruding nail is fixedly provided on the side of the first fixing plate near the second fixing plate, a protruding nail is fixedly provided on the side of the second fixing plate near the first fixing plate, a protruding nail is fixedly provided on the side of the first fixing plate near the second fixing plate, and a protruding nail is fixedly provided on the side of the second fixing plate near the first fixing plate.