A spinal pedicle fixator combined with lamina clip for repairing diastematomy

Abstract

The application discloses a kind of vertebral arch root fixator joint lamina clip isthmus crack repair device, belong to lumbar vertebra internal fixation instrument technical field, this vertebral arch root fixator joint lamina clip isthmus crack repair device, including the fixed mechanism of screw connection between vertebral body and vertebral arch root, one end of the fixed mechanism is equipped with connecting mechanism;One end of the fixed mechanism is equipped with locking mechanism, in combination state, the fixed mechanism and connecting mechanism are locked by locking mechanism, the other end of the connecting mechanism is fixedly connected with clamping mechanism.The fixed mechanism, clamping mechanism and connecting mechanism can be designed in the application, the vertebral arch screw can be quickly placed between vertebral body and vertebral arch root, the lamina clip is clamped with lamina, by connecting mechanism is mutually tensioned, and it is applicable to different positions of isthmus crack, can exert force according to the crack of vertebral body degree of closure, prevent secondary injury of lamina caused by excessive force.

Description

Technical Field

[0001] This invention belongs to the technical field of lumbar internal fixation devices, specifically relating to a pedicle screw fixator combined with a laminectomy device for repairing isthmic fractures. Background Technology

[0002] Lumbar pars interarticularis fracture refers to a pathological condition in which bone fracture or defect occurs in the narrow space between the superior and inferior articular processes of the lumbar vertebrae (i.e., the isthmus). It is a fracture of the isthmus located on one or both sides of the vertebral body, most commonly in the L5 vertebra, followed by the L4 vertebra. Its occurrence is related to congenital developmental defects, chronic strain, or acute trauma, and is common in adolescent athletes, manual laborers, and other people who are subjected to long-term lumbar shear forces. Pathologically, pars interarticularis fracture is divided into stress reaction stage, incomplete fracture stage, and complete fracture stage. If it occurs bilaterally, it can lead to anterior slippage of the vertebral body (lumbar spondylolisthesis). Patients mainly present with lower back pain, which is aggravated by prolonged standing or bending and relieved by rest. It may be accompanied by radiating pain in the buttocks and legs. Diagnosis relies on X-ray, CT (to show the pars interarticularis fracture), and MRI (to assess nerve compression). Treatment is mainly conservative (immobilization, physical therapy, medication). Intractable pain or neurological symptoms require surgical fusion. Early intervention can effectively delay the progression of the disease.

[0003] The existing methods for repairing and fixing lumbar pars interarticularis fractures mostly involve using laminae hooks to apply pressure and fix the fracture site, implanting pedicle screws into the vertebral body, and hooking the laminae under the lamina. The fracture site is aligned by applying reverse tension. However, this method has the problem that it is impossible to judge the amount of force applied during the process of aligning the pars interarticularis fractures by applying reverse pressure. If the force is too large, it may cause secondary damage to the lamina, while if the force is too small, the laminae hook may not be firmly fixed to the lower end of the lamina, making it easy to slip and resulting in poor alignment of the fracture line. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a pedicle screw fixator combined with laminectomy for isthmic fracture repair.

[0005] The technical solution adopted to solve the above technical problems is: a pedicle fixation device combined with a laminar clamp for isthmic fracture repair, including a fixation mechanism threaded between the vertebral body and the pedicle, and a connecting mechanism at one end of the fixation mechanism;

[0006] A locking mechanism is installed at one end of the fixing mechanism. In the combined state, the fixing mechanism and the connecting mechanism are locked by the locking mechanism, and a clamping mechanism is fixedly connected to the other end of the connecting mechanism.

[0007] The clamping mechanism has a clamping screw at its internal center. The clamping mechanism clamps the bottom end of the vertebral lamina, and the clamping screw acts to fix the clamping mechanism to the vertebral lamina.

[0008] Furthermore, the fixing mechanism includes a pedicle screw threaded between the vertebral body and the pedicle, the other end of the pedicle screw being fixedly connected to a first mounting base, the other end of the first mounting base being movably connected to a first universal joint, the other end of the first universal joint being fixedly connected to a connecting base, the other end of the connecting base having a connecting groove, the front end of the outer wall of the connecting base being fixedly connected to a retaining ring, the rear center of the connecting base having a first thread, and the center of the outer wall of the first mounting base being fixedly connected to a hexagonal locking ring.

[0009] Using the above technical solution, when performing pars interarticularis repair surgery on patients, the pedicle screw is first placed between the vertebral body and the pedicle. The hexagonal locking ring is rotated by a screwdriver, which drives the first mounting seat to rotate, thereby tightening the pedicle screw. Since the connecting seat is connected to the pedicle screw through the first universal joint, the connecting seat can change its angle at will, which is convenient for subsequent connection with the connecting mechanism, thus facilitating the repair of pars interarticularis.

[0010] Furthermore, the retaining ring seat is aligned with the first thread, and the hexagonal locking ring and the first mounting base are an integral structure.

[0011] Through the above technical solution, the retaining ring seat can prevent the locking mechanism from falling out, so that the locking mechanism is located in the connecting seat and has connectivity. When fixing the entire fixation mechanism, it is only necessary to place the pedicle screw between the vertebral body and the pedicle.

[0012] Furthermore, the clamping mechanism includes a vertebral lamina clamp, the rear end of which has a second thread at its inner center, and the front end of which has a fixed ring seat fixedly connected to its outer wall center.

[0013] With the above technical solution, after the fixation mechanism is inserted, the lamina clip is clamped at the bottom of the lamina. First, a hole is drilled in the lamina using medical instruments, aligning the second thread and the fixation ring seat with the hole. Then, the clamping screw is inserted into the fixation ring seat and passes through the lamina. The clamping screw is rotated so that one end of the clamping screw is threaded into the second thread and tightened, thus fixing the entire clamping mechanism to the lamina through the clamping screw. It should be noted that the clamping mechanism is installed on one side of the lamina crack, and the fixation mechanism is installed on the other side of the lamina crack. This facilitates the subsequent use of connecting and locking mechanisms to bring the fixation mechanism and clamping mechanism closer together, thereby ensuring a precise fit to the crack on the lamina and improving postoperative recovery.

[0014] Furthermore, the lamina clamp is made of titanium alloy and is clamped to the bottom end of the lamina. The clamping screw passes through the lamina and the fixing ring seat and is threadedly connected to the second thread.

[0015] Through the above technical solution, since the elastic modulus of titanium alloy is significantly lower than that of stainless steel and closer to that of cortical bone, osteoporosis caused by excessive rigidity is avoided. At the same time, titanium alloy has a certain degree of elasticity, conforms to the anatomical shape of the vertebral lamina, and provides stable gripping force. When the locking mechanism is locked, it is more conducive to the alignment of cracks on the vertebral lamina and improves the surgical effect.

[0016] Furthermore, the connecting mechanism includes a second mounting base fixedly connected to the front end of the outer wall of the vertebral plate clamp. The front end of the second mounting base is movably connected to a second universal joint. The other end of the second universal joint is movably connected to a connecting plate. The other end of the connecting plate has a slot inside. The other end of the connecting plate has mounting slots on both sides of the slot. Two springs are installed in each of the two mounting slots. The outer ends of each pair of springs are fixedly connected to a toothed plate.

[0017] With the above technical solution, after the fixing mechanism and clamping mechanism are fixed, the other end of the connecting plate is inserted into the connecting groove. Since the connecting plate and the vertebral lamina clamp are connected by the second universal joint, the connecting plate can be changed at different angles. The connecting seat and the pedicle screw are connected by the first universal joint, so that the connecting plate can fit tightly in the connecting groove. The retaining ring seat and the first thread are aligned with the groove. In order to accurately insert the locking mechanism and lock it in, when the locking mechanism is rotated and tightened, it drives the two toothed plates to move. Since the two toothed plates are fixedly connected to the connecting plate, the connecting plate is moved, causing the connecting plate to move the vertebral lamina clamp closer to the pedicle screw, thereby causing the crack on the vertebral lamina to align and repair the isthmic fracture.

[0018] Furthermore, in the combined state, the other end of the connecting plate is located in the connecting groove, and the retaining ring seat and the first thread are aligned with the groove opening.

[0019] With the above technical solution, since the location of the isthmic fissure on each patient's vertebral body is different, both the connecting plate and the connecting seat can move freely. This allows the connecting plate to be precisely inserted into the connecting groove, which facilitates the subsequent locking mechanism to tighten and lock the two together, achieving alignment of the isthmic fissure. Furthermore, during the operation, force can be applied across the alignment of the isthmic fissure, preventing excessive force from causing secondary damage to the vertebral lamina, and also preventing insufficient force from causing vertebral lamina cracks and incomplete alignment, greatly improving the surgical outcome.

[0020] Furthermore, the locking mechanism includes an inner locking bolt disposed within a retaining ring seat. One end of the outer wall of the inner locking bolt is provided with a third thread, and a fourth thread is provided on the outer wall of the inner locking bolt near the third thread. A retaining ring is fixedly connected to the other end of the outer wall of the inner locking bolt, and a hexagonal groove is provided on the other end of the inner locking bolt. An outer locking bolt is slidably connected to the center of the outer wall of the inner locking bolt. A toothed ring is fixedly connected to one end of the outer wall of the outer locking bolt, and a fifth thread is provided on one end of the inner wall of the outer locking bolt. A hexagonal lock head is fixedly connected to the other end of the outer locking bolt.

[0021] With the above technical solution, when the connecting plate is precisely inserted into the connecting groove, the inner locking bolt is pushed to align the third thread with the first thread. Then, the hexagonal slot is rotated using a bolt cutter, causing the inner locking bolt to rotate and connect the inner locking bolt threaded into the first thread. It does not need to be tightened too much. Next, the outer locking bolt is pushed and continuously rotated until the gear ring aligns with the two gear plates. Once aligned, pushing the outer locking bolt pushes the gear ring, causing it to push the two gear plates. The two gear plates contract under the action of their respective springs, causing the gear ring to mesh between them. Finally, the hexagonal locking head is rotated using a bolt cutter, thus... The external locking bolt is connected to the fourth thread via the fifth thread. Simply align the inner surface of the hexagonal lock head with the outer wall of the retaining ring seat. At this point, the external locking bolt and the internal locking bolt are integrated. When the internal locking bolt is continuously tightened, it pushes inward, causing the hexagonal lock head to press more firmly against the retaining ring seat. This, in turn, causes the connecting seat to clamp the connecting plate more forcefully. Simultaneously, it causes the gear ring to push the two gear plates more forcefully, which in turn pulls the connecting plate more forcefully. This, in turn, pulls the lamina clamp more forcefully, allowing the cracks on the lamina to align more effectively. Apply tightening force to the internal locking bolt according to the specific situation to prevent excessive force from causing secondary damage to the lamina.

[0022] Furthermore, in the combined state, the fifth thread is threadedly connected to the fourth thread.

[0023] With the above technical solution, when the outer locking bolt is connected to the fourth thread through the fifth thread, it can make the outer locking bolt and the inner locking bolt a single unit, and it has a self-locking effect to prevent the toothed ring from reversing, thereby effectively tightening the connecting plate and making the connection strong.

[0024] Furthermore, the inner locking bolt is threadedly connected to the first thread via a third thread, and the gear ring meshes with two gear plates.

[0025] The above technical solution first uses the internal locking bolt to clamp the connecting plate tightly, preventing the connecting plate from moving freely. Then, simply rotating the gear ring will tighten the vertebral clamp, thus achieving a precise fit between the isthmus and the fracture.

[0026] The beneficial effects of the present invention are as follows: (1) By designing a fixing mechanism, a clamping mechanism and a connecting mechanism, the present invention can quickly insert the pedicle screw between the vertebral body and the pedicle, clamp the lamina clip to the lamina, and tighten them together through the connecting mechanism. It is applicable to isthmic fractures at different locations. The force can be applied according to the degree of alignment of the vertebral body fracture, and excessive force can be applied to prevent secondary damage to the lamina. (2) By designing a locking mechanism, the present invention can quickly tighten the lamina clip, so that the lamina clip moves closer to the pedicle screw. When the two are pulled to a certain distance, which is the most effective degree of alignment of the vertebral body fracture, the self-locking action is used to achieve locking, which greatly improves the connection between the pedicle screw and the lamina clip, thereby improving the postoperative recovery effect. Attached Figure Description

[0027] Figure 1 This is an overall view of the present invention installed between the pedicle and the lamina.

[0028] Figure 2 This is an overall front view of the present invention installed between the pedicle and the lamina;

[0029] Figure 3 This is an overall appearance drawing of the present invention;

[0030] Figure 4 This is an unfolded diagram of the fixing mechanism and locking mechanism of the present invention;

[0031] Figure 5 This is an unfolded view of the clamping mechanism and clamping screw of the present invention;

[0032] Figure 6 This is a schematic diagram of the connection mechanism structure of the present invention;

[0033] Figure 7 This is a cross-sectional view of the connection mechanism of the present invention;

[0034] Figure 8 This is a schematic diagram of the locking mechanism structure of the present invention;

[0035] Figure 9 This is an unfolded diagram of the locking mechanism of the present invention;

[0036] Figure 10 This is a schematic diagram of the locking mechanism and connecting mechanism of the present invention.

[0037] Reference numerals: 1. Vertebrae; 11. Pedicle; 12. Lamine; 2. Fixation mechanism; 201. Pedicle screw; 202. First mounting seat; 203. First universal joint; 204. Connecting seat; 205. Connecting groove; 206. Snap ring seat; 207. First thread; 208. Hexagonal locking ring; 3. Clamping mechanism; 301. Lamine clamp; 302. Second thread; 303. Fixing ring seat; 4. Clamping screw; 5. 501. Connecting mechanism; 502. Second mounting base; 503. Second universal joint; 504. Connecting plate; 505. Groove; 506. Spring; 507. Toothed plate; 6. Locking mechanism; 601. Inner locking bolt; 602. Third thread; 603. Fourth thread; 604. Retaining ring; 605. Hexagonal groove; 606. Outer locking bolt; 607. Toothed ring; 608. Fifth thread; 609. Hexagonal lock head. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0039] like Figures 1-4 As shown, this embodiment of a pedicle screw fixation device combined with laminectomy for isthmic fracture repair includes a fixation mechanism 2 threaded between a vertebral body 1 and a pedicle 11. The fixation mechanism 2 includes a pedicle screw 201 threaded between the vertebral body 1 and the pedicle 11. A first mounting base 202 is fixedly connected to the other end of the pedicle screw 201. A first universal joint 203 is movably connected to the other end of the first mounting base 202. A connecting seat 204 is fixedly connected to the other end of the first universal joint 203. A connecting groove 205 is provided at the other end of the connecting seat 204. A retaining ring 206 is fixedly connected to the front end of the outer wall of the connecting seat 204. A first thread 207 is provided at the center of the rear end of the connecting seat 204. A hexagonal locking ring 208 is fixedly connected to the center of the outer wall of the first mounting base 202. This device is used for isthmic fracture repair of the patient. During the reoperation, the pedicle screw 201 is first placed between the vertebral body 1 and the pedicle 11. The hexagonal locking ring 208 is rotated with a screwdriver, thereby rotating the first mounting seat 202 and tightening the pedicle screw 201. Since the connecting seat 204 is connected to the pedicle screw 201 through the first universal joint 203, the connecting seat 204 can be adjusted at will, which is convenient for subsequent connection with the connecting mechanism 5, thus facilitating the repair of the isthmic fracture. The retaining ring seat 206 is aligned with the first thread 207. The hexagonal locking ring 208 and the first mounting seat 202 are an integral structure. The retaining ring seat 206 can prevent the locking mechanism 6 from falling out, so that the locking mechanism 6 is located in the connecting seat 204 and has connectivity. When fixing the entire fixation mechanism 2, it is only necessary to place the pedicle screw 201 between the vertebral body 1 and the pedicle 11.

[0040] like Figures 1-5 As shown, the other end of the connecting mechanism 5 is fixedly connected to a clamping mechanism 3. The clamping mechanism 3 includes a lamina clamp 301. The rear end of the lamina clamp 301 has a second thread 302 at its center. The front end of the lamina clamp 301 has a fixing ring seat 303 fixedly connected to its center. When the fixing mechanism 2 is inserted, the lamina clamp 301 is clamped at the bottom of the lamina 12. First, a hole is drilled in the lamina 12 using a medical instrument so that the second thread 302 and the fixing ring seat 303 are aligned with the hole. Then, the clamping screw 4 is inserted into the fixing ring seat 303 and passes through the lamina 12. The clamping screw 4 is rotated so that one end of the clamping screw 4 is threadedly connected to the second thread 302 and tightened. The entire clamping mechanism 3 is fixed to the lamina 12 by the clamping screw 4. It should be noted that the clamping mechanism 3 is installed on one side of the crack in the lamina 12, and the fixing mechanism 2 is installed on the other side of the crack in the lamina 12. This facilitates the subsequent connection of the fixing mechanism 2 and the clamping mechanism 3 to be brought closer together through the connecting mechanism 5 and the locking mechanism 6, thereby ensuring precise alignment of the cracks on the vertebral lamina 12 and improving postoperative recovery. The vertebral lamina clamp 301 is made of titanium alloy and is clamped to the bottom end of the vertebral lamina 12. The clamping screw 4 passes through the vertebral lamina 12 and the fixing ring seat 303 and is threaded to the second thread 302. Since the elastic modulus of titanium alloy is significantly lower than that of stainless steel and is closer to that of cortical bone, it avoids osteoporosis caused by excessive rigidity. At the same time, titanium alloy has a certain degree of elasticity, conforms to the anatomical shape of the vertebral lamina 12, and provides stable gripping force. When the locking mechanism 6 is locked, it is more helpful to align the cracks on the vertebral lamina 12 and improve the surgical effect. The clamping mechanism 3 has a clamping screw 4 in the center of its interior and clamps the bottom end of the vertebral lamina 12. The clamping screw 4 acts to fix the clamping mechanism 3 and the vertebral lamina 12.

[0041] like Figures 1-10As shown, one end of the fixing mechanism 2 is provided with a connecting mechanism 5. The connecting mechanism 5 includes a second mounting base 501 fixedly connected to the front end of the outer wall of the vertebral plate clamp 301. The front end of the second mounting base 501 is movably connected to a second universal joint 502. The other end of the second universal joint 502 is movably connected to a connecting plate 503. A slot 504 is opened inside the other end of the connecting plate 503. Mounting slots 505 are opened on both sides of the slot 504 at the other end of the connecting plate 503. Two springs 506 are installed in each of the two mounting slots 505. The outer ends are all fixedly connected with toothed plates 507. After the fixing mechanism 2 and clamping mechanism 3 are fixed, the other end of the connecting plate 503 is inserted into the connecting groove 205. Since the connecting plate 503 and the vertebral lamina clamp 301 are connected by the second universal joint 502, the connecting plate 503 can be changed at different angles. The connecting seat 204 and the pedicle screw 201 are connected by the first universal joint 203, so that the connecting plate 503 can fit tightly in the connecting groove 205. The retaining ring seat 206 and the first thread 207 are aligned with the groove 504. To ensure precise insertion and locking of the locking mechanism 6, when the locking mechanism 6 is rotated and tightened, it moves the two toothed plates 507. Since the two toothed plates 507 are fixedly connected to the connecting plate 503, the connecting plate 503 moves, causing it to move and move the vertebral lamina clamp 301 toward the pedicle screw 201. This allows the crack on the vertebral lamina 12 to align, repairing the isthmic fracture. In the combined state, the other end of the connecting plate 503 is located in the connecting groove 205, and the retaining ring seat 206 and the first thread 2... Aligning 07 with slot 504, since the location of the isthmic fissure on each patient's vertebral body is different, both the connecting plate 503 and the connecting seat 204 can move freely at this time, so that the connecting plate 503 can be accurately inserted into the connecting slot 205, which facilitates the subsequent locking mechanism 6 to tighten and lock the two, realizing the alignment of the isthmic fissure. In addition, during the operation, force can be applied through the alignment of the isthmic fissure to prevent excessive force from causing secondary damage to the lamina 12, and also to prevent insufficient force from causing the lamina 12 fissure to not be properly aligned, which greatly improves the surgical effect.

[0042] like Figures 1-10As shown, a locking mechanism 6 is installed at one end of the fixing mechanism 2. In the combined state, the fixing mechanism 2 and the connecting mechanism 5 are locked by the locking mechanism 6. The locking mechanism 6 includes an inner locking bolt 601 disposed in the retaining ring seat 206. One end of the outer wall of the inner locking bolt 601 is provided with a third thread 602, and a fourth thread 603 is provided on the outer wall of the inner locking bolt 601 near the third thread 602. A retaining ring 604 is fixedly connected to the other end of the outer wall of the inner locking bolt 601, and a hexagonal groove 605 is provided on the other end of the inner locking bolt 601. An outer locking bolt 606 is slidably connected to the center of the outer wall of the inner locking bolt 601. One end of the outer wall is fixedly connected to a gear ring 607, and one end of the inner wall of the outer locking bolt 606 is provided with a fifth thread 608. The other end of the outer locking bolt 606 is fixedly connected to a hexagonal locking head 609. When the connecting plate 503 is precisely inserted into the connecting groove 205, the inner locking bolt 601 is pushed so that the third thread 602 aligns with the first thread 207. Then, the hexagonal groove 605 is rotated with a bolt cutter, thereby driving the inner locking bolt 601 to rotate, thus threading the inner locking bolt 601 into the first thread 207. It does not need to be tightened too much. Then, the outer locking bolt 606 is pushed and rotated continuously so that the gear ring 607 and the first thread 207 are threaded together. When the two toothed plates 507 are aligned, and the toothed ring 607 is aligned with the two toothed plates 507, pushing the outer locking bolt 606 will push the toothed ring 607, causing the toothed ring 607 to push the two toothed plates 507. The two toothed plates 507 will retract under the action of their respective springs 506, causing the toothed ring 607 to mesh between the two toothed plates 507. Then, by turning the hexagonal lock head 609 with a bolt cutter, the outer locking bolt 606 will be threadedly connected to the fourth thread 603 through the fifth thread 608. It is only necessary to align the inner surface of the hexagonal lock head 609 with the outer wall of the retaining ring seat 206. At this time, the outer locking bolt 606 and the inner... The locking bolt 601 is an integral unit. When the inner locking bolt 601 is continuously tightened, it pushes inward, causing the hexagonal lock head 609 to more forcefully adhere to the retaining ring seat 206. This, in turn, causes the connecting seat 204 to more forcefully clamp the connecting plate 503. Simultaneously, it causes the toothed ring 607 to more forcefully push the two toothed plates 507, which in turn pull the connecting plate 503 more forcefully. This, in turn, pulls the vertebral plate clamp 301 more forcefully, allowing the cracks on the vertebral plate 12 to align more effectively. The tightening force of the inner locking bolt 601 is adjusted according to the specific situation to prevent excessive force from causing secondary damage to the vertebral plate 12.

[0043] In the combined state, the fifth thread 608 and the fourth thread 603 are threadedly connected. When the outer locking bolt 606 is threadedly connected to the fourth thread 603 through the fifth thread 608, it can make the outer locking bolt 606 and the inner locking bolt 601 a single unit. Secondly, it has a self-locking effect to prevent the toothed ring 607 from reversing, thereby effectively tightening the connecting plate 503 and ensuring strong connection.

[0044] The inner locking bolt 601 is threadedly connected to the first thread 207 via the third thread 602. The gear ring 607 meshes with the two gear plates 507. First, the connecting seat 204 is clamped tightly to the connecting plate 503 by the inner locking bolt 601, so that the connecting plate 503 cannot move at will. Then, simply rotate the gear ring 607 to tighten the vertebral plate clamp 301, thereby achieving a precise fit between the isthmus crack.

[0045] The working principle of this embodiment is as follows: When performing pars interarticularis repair surgery on a patient, the pedicle screw 201 is first placed between the vertebral body 1 and the pedicle 11. The hexagonal locking ring 208 is rotated by a screwdriver, thereby driving the first mounting base 202 to rotate, thereby tightening the pedicle screw 201, thus successfully fixing the fixation mechanism 2.

[0046] After the fixation mechanism 2 is inserted, the lamina clamp 301 is clamped at the bottom of the lamina 12. First, a hole is drilled in the lamina 12 using a medical instrument so that the second thread 302 and the fixing ring seat 303 are aligned with the hole. Then, the clamping screw 4 is inserted into the fixing ring seat 303 and passes through the lamina 12. The clamping screw 4 is rotated so that one end of the clamping screw 4 is threadedly connected to the second thread 302 and tightened. This fixes the entire clamping mechanism 3 to the lamina 12 through the clamping screw 4. It should be noted that the clamping mechanism 3 is installed on one side of the crack in the lamina 12, and the fixation mechanism 2 is installed on the other side of the crack in the lamina 12. This makes it convenient to bring the fixation mechanism 2 and the clamping mechanism 3 closer to each other through the connecting mechanism 5 and the locking mechanism 6, so as to precisely align the crack in the lamina 12.

[0047] At this time, the other end of the connecting plate 503 is inserted into the connecting groove 205. Since the connecting plate 503 and the vertebral plate clamp 301 are connected by the second universal joint 502, the connecting plate 503 can be changed at different angles. The connecting seat 204 and the pedicle screw 201 are connected by the first universal joint 203, so that the connecting plate 503 can fit tightly in the connecting groove 205. The retaining ring seat 206 and the first thread 207 are aligned with the groove 504 so that the locking mechanism 6 can be accurately inserted into it later.

[0048] When the connecting plate 503 is precisely inserted into the connecting groove 205, push the inner locking bolt 601 to align the third thread 602 with the first thread 207. Then, rotate the hexagonal groove 605 with a bolt cutter, thereby rotating the inner locking bolt 601 and threading it into the first thread 207. It doesn't need to be tightened too much. Then, push the outer locking bolt 606 and rotate it continuously until the gear ring 607 aligns with the two gear plates 507. Once aligned, pushing the outer locking bolt 606 pushes the gear ring 607, causing it to push the two gear plates 507. The two gear plates 507 contract under the action of their respective springs 506, causing the gear ring 607 to engage between them. Finally, rotate the hexagonal lock head 609 with a bolt cutter, thereby activating the outer locking bolt. Bolt 606 is threadedly connected to the fourth thread 603 via the fifth thread 608. Simply align the inner surface of the hexagonal locking head 609 with the outer wall of the retaining ring seat 206. At this point, the outer locking bolt 606 and the inner locking bolt 601 are integrated. Continuously tightening the inner locking bolt 601 pushes it further inward, causing the hexagonal locking head 609 to more forcefully adhere to the retaining ring seat 206. This, in turn, causes the connecting seat 204 to more forcefully clamp the connecting plate 503. Simultaneously, it causes the toothed ring 607 to more forcefully push the two toothed plates 507, resulting in the two toothed plates 507 pulling the connecting plate 503 more forcefully. This, in turn, pulls the vertebral plate clamp 301 more forcefully, allowing the cracks on the vertebral plate 12 to align more effectively. Apply tightening force to the inner locking bolt 601 as needed to achieve locking and prevent excessive force from causing secondary damage to the vertebral plate 12.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A pedicle screw combined laminar clamp isthmus repair device, comprising a fixation mechanism (2) screw-connected between a vertebral body (1) and a pedicle (11), the fixation mechanism (2) comprising a clasp seat (206), characterized in that: One end of the fixing mechanism (2) is provided with a connecting mechanism (5), the connecting mechanism (5) comprises a second mounting seat (501) fixedly connected to the front end of the outer wall of the lamina clamp (301), the front end of the second mounting seat (501) is movably connected with a second universal joint (502), the other end of the second universal joint (502) is movably connected with a connecting plate (503), the other end of the connecting plate (503) is internally provided with a notch (504), the other end of the connecting plate (503) is provided with a mounting groove (505) on both sides of the notch (504), two spring (506) are mounted in the two mounting grooves (505), and the outer end of each two spring (506) is fixedly connected with a toothed plate (507). One end of the fixing mechanism (2) is provided with a locking mechanism (6), and in the combined state, the fixing mechanism (2) and the connecting mechanism (5) are locked through the locking mechanism (6), the other end of the connecting mechanism (5) is fixedly connected with a clamping mechanism (3), the clamping mechanism (3) comprises a lamina clamp (301), the locking mechanism (6) comprises an inner lock bolt (601) arranged in a clasp seat (206), one end of the outer wall of the inner lock bolt (601) is provided with a third thread (602), the outer wall of the inner lock bolt (601) is provided with a fourth thread (603) close to the third thread (602), the other end of the outer wall of the inner lock bolt (601) is fixedly connected with a stop ring (604), the other end of the inner lock bolt (601) is provided with a hexagonal groove (605), the outer wall of the inner lock bolt (601) is movably connected with an outer lock bolt (606), one end of the outer wall of the outer lock bolt (606) is fixedly connected with a gear ring (607), one end of the inner wall of the outer lock bolt (606) is provided with a fifth thread (608), the other end of the outer lock bolt (606) is fixedly connected with a hexagonal lock head (609). The inner center of the clamping mechanism (3) is provided with a clamping screw (4), the clamping mechanism (3) is clamped at the bottom end of the lamina (12), and the clamping screw (4) acts on the fixation of the clamping mechanism (3) and the lamina (12).

2. The device according to claim 1, wherein the device is a device for repairing a spinal bifida occulta, and the device is characterized by: The fixing mechanism (2) comprises a pedicle screw (201) threadedly connected between the vertebral body (1) and the pedicle (11), the other end of the pedicle screw (201) is fixedly connected with a first mounting seat (202), the other end of the first mounting seat (202) is movably connected with a first universal joint (203), the other end of the first universal joint (203) is fixedly connected with a connecting seat (204), the other end of the connecting seat (204) is provided with a connecting groove (205), the front end of the outer wall of the connecting seat (204) is fixedly connected with a clasp seat (206), and the rear end center of the connecting seat (204) is provided with a first thread (207).

3. The combination pedicle screw and laminar clamp diastematomy repair device of claim 2, wherein, The clasp seat (206) is aligned with the first thread (207), and the hexagonal lock ring (208) and the first mounting seat (202) are an integral structure.

4. The device of claim 1, wherein the device is a combination of a pedicle screw and laminar clamp for repair of a diastematomy. The rear end of the lamina clamp (301) is internally provided with a second thread (302), and the front end of the lamina clamp (301) is externally provided with a fixed ring seat (303).

5. The pedicle screw combined laminar clamp diastematomy repair device of claim 4, wherein, The lamina clamp (301) is made of titanium alloy, is clamped at the bottom end of the lamina (12), and the clamp screw (4) penetrates the lamina (12) and the fixed ring seat (303) and is threadedly connected with the second thread (302).

6. The pedicle screw combined laminar clamp diastematomy repair device of claim 2, wherein, In the combined state, the other end of the connecting plate (503) is located in the connecting groove (205), and the snap ring seat (206) and the first thread (207) are aligned with the notch (504).

7. The pedicle screw combined laminar clamp diastematomy repair device of claim 1, wherein, In the combined state, the fifth thread (608) is threadedly connected with the fourth thread (603).

8. The pedicle screw combined laminar clamp diastematomy repair device of claim 2, wherein, The inner lock bolt (601) is threadedly connected with the first thread (207) through the third thread (602), and the gear ring (607) is engaged with the two toothed plates (507).

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