Spine plate resetting and fixing system

Abstract

The utility model discloses a spinal plate resetting and fixing system, which particularly relates to the technical field of medical instruments and comprises a spinal plate resetting and fixing plate, spinal plate resetting and fixing screws and a mounting instrument for grabbing the spinal plate resetting and fixing screws. At least three first mounting holes and at least two second mounting holes are formed in the spine plate reset fixing plate, the spine plate reset fixing screws are mounted in the first mounting holes and the second mounting holes, and adjusting sliding grooves used for sliding of the spine plate reset fixing screws are formed among the at least three first mounting holes. And a double-nut mechanism is arranged at the head of the spinal plate reduction fixing screw. According to the spinal plate reposition fixing device, the spinal plate reposition fixing plate, the spinal plate reposition fixing screw and the installation instrument are arranged, so that a spinal plate reposition fixing system in intraspinal tumor resection is improved, especially for multi-section intraspinal tumors, a vertebral plate and a spine are fixed in vertebral plate spinous process complex reposition after tumor resection, and anatomical reposition is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and more specifically, to a spinal plate resetting and fixing system. Background Art

[0002] It is known that the incidence of spinal canal tumors accounts for about 20% of nervous system tumors, most of which are benign tumors. Among them, posterior total laminectomy to expose the spinal canal is the traditional way of surgical treatment of intraspinal tumors. Its advantage is that the field of view is wide during surgery, which is convenient for thorough exposure and removal of intraspinal tumors, while better protecting nerve function. Since this operation excessively damages the posterior structure of the spine, the biomechanical stability of the spine is reduced, which may lead to spinal deformity in the long term. In addition, long postoperative scar adhesions can cause iatrogenic spinal stenosis in the human spinal canal and produce neurological symptoms. Therefore, in order to avoid the above-mentioned disadvantages, the commonly used surgical method is laminectomy. Its advantage is that it can effectively prevent postoperative scar adhesion from compressing the spinal cord, and to a certain extent restore the integrity of the spinal canal, which helps to maintain spinal stability.

[0003] Among them, there are different fixation techniques for lamina reduction after lamina reduction surgery in clinical practice. The fixation methods include: silk or steel wire ligation, micro steel plate, screws, etc., and some lamina fixation systems used in clinical practice use skull connecting plates; some use improved connecting plates for lamina fixation: such as the lamina fixation system with patent application publication number CN 115252092 A, which uses a connecting plate to combine multiple parts to fix two adjacent transverse processes, vertebral bodies and lamina, so as to fix the corresponding areas.

[0004] However, in actual use, if the commonly used skull connecting plate method is adopted, the connecting plate is thin, weak and cannot be adjusted in length because it was originally designed for skull reduction and fixation after cranial surgery. In addition, the screws are easy to loosen and shift, suitable for flat fixation but not for fixation of concave and convex parts of the spine, and the screws are easily damaged by the instrument. If the public vertebral plate fixation system is adopted, the fixing technology of the connecting plate is complicated and difficult to operate, causing great damage to soft tissues. After fixation of the adjacent transverse processes, the spinal activity is affected, the healing of the vertebral plates is affected, and even the reduction nail plate is shifted and falls off. Therefore, the utility model proposes a vertebral plate reduction and fixation system as a further improvement. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a spinal plate reduction and fixation system to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spinal plate reduction and fixation system, the system comprising: a spinal plate reduction and fixation plate, a spinal plate reduction and fixation screw, and an installation device for grabbing the spinal plate reduction and fixation screw;

[0007] The spinal plate reduction and fixation plate includes: a main fixing plate and a secondary fixing plate, one end of the main fixing plate is fixedly connected to at least two secondary fixing plates as a whole, at least three first mounting holes are opened at the central axis of the main fixing plate, and a second mounting hole is opened at one end of the secondary fixing plate away from the main fixing plate, the spinal plate reduction and fixation screws are installed in the first mounting holes and the second mounting holes, and adjustment grooves for sliding the spinal plate reduction and fixation screws are opened between at least three of the first mounting holes, and the head of the spinal plate reduction and fixation screw is provided with a double nut mechanism.

[0008] Furthermore, the double nut mechanism includes: a lower nut connected to the spinal plate reduction and fixation screw body and an upper nut connected to the lower nut, the lower nut and the upper nut are both configured as a truncated cone shape, and the maximum diameter of the upper nut is smaller than the maximum diameter of the lower nut.

[0009] Furthermore, the first mounting hole and the second mounting hole are both divided into: a cylindrical placement groove and a truncated cone thread groove along the installation direction of the spinal plate reduction and fixation screw;

[0010] The spinal plate reduction and fixing screw is threadedly connected to the truncated cone thread groove, the maximum diameter of the lower nut is larger than the maximum diameter of the truncated cone thread groove, and the maximum diameter of the lower nut is smaller than the diameter of the cylindrical placement groove, and the lower nut is clamped with the cylindrical placement groove.

[0011] Furthermore, the shape of the spinal plate reduction and fixation plate is set to be a Y-shape.

[0012] Furthermore, the width of the adjusting groove is equal to the minimum diameter of the truncated cone thread groove, and the width of the adjusting groove is smaller than the maximum diameter of the lower nut.

[0013] Furthermore, the installation device includes: a screwdriver and a fixed sleeve, the fixed sleeve is movably sleeved on the handle end of the screwdriver, the handle end of the screwdriver is fixedly connected to the inner wall of the end of the fixed sleeve through a reset spring, and the end of the fixed sleeve away from the reset spring is fixedly connected to a left caliper and a right caliper distributed on both sides of the screwdriver, and the left caliper and the right caliper are both clamped with the upper nut at the end away from the fixed sleeve.

[0014] Furthermore, a transverse hole groove communicating with the adjustment slide groove is formed on one side of the main fixing plate close to the spinal plate.

[0015] Technical effects and advantages of the utility model:

[0016] 1. Compared with the prior art, the spinal plate reduction and fixation system in intraspinal tumor resection is improved by providing a spinal plate reduction and fixation plate, a spinal plate reduction and fixation screw and an installation instrument. Especially for multi-segment intraspinal tumors, the vertebral plate and the spine are fixed during the vertebral plate spinous process complex reduction surgery after tumor resection to achieve anatomical reduction. The spinal plate reduction and fixation plate and the spinal plate reduction and fixation screw are made of titanium alloy, so that the device is easy to shape and has metal strength, does not affect magnetic resonance imaging, and the raw material price is low, thereby reducing costs.

[0017] 2. Compared with the prior art, by setting a plurality of first mounting holes and adjustment grooves of the spinal plate reduction and fixation plate, the doctor can adjust the gap size between the removed vertebral plate spinous process bone and the stump between the vertebral plate or the inferior articular process bone, without removing the spinal plate reduction and fixation screws and repeating the installation operation, thus avoiding bone damage caused by repeated installation and removal of screws, making the operation simpler and more convenient, saving surgical time, and improving the shortcomings of existing similar products such as fixed length and frequent replacement of connecting plates; by setting the shape of the spinal plate reduction and fixation plate to a Y-shape, the triangle stability principle can be used for three-point fixation, thereby making the fixation more stable.

[0018] 3. Compared with the prior art, by providing a spinal plate reduction and fixing screw, the spinal plate reduction and fixing screw can be tightly threadedly connected with the conical thread groove opened on the spinal plate reduction and fixing plate to prevent the spinal plate reduction and fixing screw from falling off and shifting; the design of the double nut mechanism is also utilized to make the upper nut of the spinal plate reduction and fixing screw engage with the left caliper and the right caliper of the installation instrument, while the lower nut can engage with the cylindrical placement groove, thereby ensuring that the spinal plate reduction and fixing screw is firmly fixed, preventing the screw from falling off from the installation instrument, and at the same time preventing the installation instrument from slipping on other tissues and even damaging the spinal nerves.

[0019] 4. Compared with the prior art, by setting the transverse holes and grooves, it is convenient to suture the muscles beside the lamina spinous process bone and eliminate the residual cavity beside the lamina spinous process bone; by setting the length of the vertebral plate reduction and fixation screws and utilizing the thickness of the removed lamina spinous process bone, it is avoided that the lamina reduction and fixation screws penetrate the removed lamina spinous process bone and damage the tissues in the spinal canal, thereby ensuring stable fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0021] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure.

[0022] Figure 3 It is a schematic diagram of the double nut mechanism structure of the utility model.

[0023] The accompanying drawings are marked as follows:

[0024] 1. Spinal plate reduction and fixation plate;

[0025] 11. Main fixing plate; 111. First mounting hole; 112. Adjusting slide groove; 113. Horizontal hole groove;

[0026] 12. auxiliary fixing plate; 121. second mounting hole;

[0027] a. Cylindrical placement groove; b. Cone thread groove;

[0028] 2. Spine plate reduction and fixation screws;

[0029] 3. Install equipment;

[0030] 31. Screwdriver; 32. Fixed sleeve; 33. Return spring; 34. Left caliper; 35. Right caliper;

[0031] 4. Double nut mechanism; 41. Lower nut; 42. Upper nut. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0033] As attached Figure 1 , Attachment Figure 2 and attached Figure 3 A spinal plate reduction and fixation system is shown, the system comprising: a spinal plate reduction and fixation plate 1, a spinal plate reduction and fixation screw 2, and an installation instrument 3 for grabbing the spinal plate reduction and fixation screw 2;

[0034] The spinal plate reduction and fixation plate 1 includes: a main fixing plate 11 and a secondary fixing plate 12. One end of the main fixing plate 11 is fixedly connected to at least two secondary fixing plates 12 to form a whole. At least three first mounting holes 111 are opened at the central axis of the main fixing plate 11. A second mounting hole 121 is opened at one end of the secondary fixing plate 12 away from the main fixing plate 11. The spinal plate reduction and fixation screws 2 are installed in the first mounting holes 111 and the second mounting holes 121. Adjustment grooves 112 for sliding the spinal plate reduction and fixation screws 2 are opened between at least three first mounting holes 111. The head of the spinal plate reduction and fixation screw 2 is provided with a double nut mechanism 4.

[0035] Wherein, the spinal plate reduction and fixation plate 1 and the spinal plate reduction and fixation screws 2 are both made of titanium alloy;

[0036] Among them, according to the size of the gap between the removed vertebral plate spinous process bone and the residual end between the vertebral plate or the inferior articular process bone, the position of the vertebral plate reduction and fixing screw 2 installed in the main fixing plate 11 is adjusted. Even if the vertebral plate reduction and fixing screw 2 on the auxiliary fixing plate 12 has been installed and fixed, the vertebral plate reduction and fixing screw 2 in the main fixing plate 11 can still be slid to adjust the length, and then there is no need to remove the vertebral plate reduction and fixing screw 2 and repeat the installation operation, so the operation is simpler and more convenient, saving surgical time; therefore, this design improves the disadvantages of existing similar products with fixed length and frequent replacement of connecting plates;

[0037] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, the shape of the spinal plate reduction and fixation plate 1 is set to be a Y-shape;

[0038] The main fixing plate 11 of the vertebral plate reduction and fixation plate 1 is designed with at least three first mounting holes 111 for mounting the vertebral plate reduction and fixation screws 2, so that the removed vertebral plate spinous process bone is fixed to the vertebral plate reduction and fixation plate 1 at least at three points;

[0039] By using at least two auxiliary fixing plates 12 of the vertebral plate reduction and fixing plate 1, the vertebral plate reduction and fixing screws 2 are installed in the second mounting holes 121 at the ends of the auxiliary fixing plates 12, and the vertebral plate or the inferior articular process bone is fixed at least at two points;

[0040] Then, the vertebral plate reduction and fixation screws 2 are installed in combination with the first installation holes 111, so that the Y-shaped vertebral plate reduction and fixation plate 1 is fixed in a triangle at least at 3 points, thereby preventing the movement between the vertebral plate spinous process bone and the vertebral plate or the inferior articular process bone, and improving the disadvantage of unstable fixation of the straight plate.

[0041] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, the double nut mechanism 4 includes: a lower nut 41 connected to the body of the spinal plate reduction and fixation screw 2 and an upper nut 42 connected to the lower nut 41. The lower nut 41 and the upper nut 42 are both configured in a truncated cone shape, and the maximum diameter of the upper nut 42 is smaller than the maximum diameter of the lower nut 41.

[0042] The first mounting hole 111 and the second mounting hole 121 are both divided into: a cylindrical placement groove a and a truncated cone thread groove b along the mounting direction of the spinal plate reduction and fixing screw 2;

[0043] The spinal plate reduction and fixation screw 2 is threadedly connected to the truncated cone thread groove b, the maximum diameter of the lower nut 41 is larger than the maximum diameter of the truncated cone thread groove b, and the maximum diameter of the lower nut 41 is smaller than the diameter of the cylindrical placement groove a, and the lower nut 41 is clamped with the cylindrical placement groove a.

[0044] The installation device 3 includes: a screwdriver 31 and a fixed sleeve 32. The fixed sleeve 32 is movably sleeved on the handle end of the screwdriver 31. The handle end of the screwdriver 31 is fixedly connected to the inner wall of the end of the fixed sleeve 32 through a reset spring 33. The end of the fixed sleeve 32 away from the reset spring 33 is fixedly connected to a left caliper 34 and a right caliper 35 distributed on both sides of the screwdriver 31. The left caliper 34 and the right caliper 35 are both clamped with the upper nut 42 at the end away from the fixed sleeve 32.

[0045] The spinal plate reduction and fixation screw 2 can be locked in the truncated cone thread groove b opened in the spinal plate reduction and fixation plate 1 to prevent the spinal plate reduction and fixation screw 2 from falling off and shifting;

[0046] Furthermore, by utilizing the design of the double nut mechanism 4, the upper nut 42 of the vertebral plate reduction and fixation screw 2 is engaged with the left clamp 34 and the right clamp 35 of the installation device 3, thereby ensuring that the vertebral plate reduction and fixation screw 2 is firmly fixed, preventing the screw from falling off the installation device 3, and preventing the installation device 3 from slipping on other tissues and even damaging the spinal nerves.

[0047] The installation instrument 3 changes the commonly used simple screwdriver head, and the tension caliper design of the installation instrument 3 enables the spinal plate reduction and fixation screw 2 to not only fix the screw during the installation process to prevent the screw from falling off, but also increase the gripping area to prevent the installation instrument 3 from slipping and damaging other tissues;

[0048] The fixed sleeve 32 is movably sleeved on the handle end of the screwdriver 31, and the screwdriver 31 can be telescopically slidable in the fixed sleeve 32. Preferably, the handle end of the screwdriver 31 and the inner cavity in which the fixed sleeve 32 slides are set to a shape that does not rotate, so that the handle end of the screwdriver 31 and the fixed sleeve 32 do not rotate;

[0049] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3 As shown, the width of the adjusting groove 112 is equal to the minimum diameter of the truncated cone thread groove b, and the width of the adjusting groove 112 is smaller than the maximum diameter of the lower nut 41; so that the nail body part of the spinal plate reduction and fixing screw 2 can slide along the adjusting groove 112 without being removed, and the lower nut 41 of the spinal plate reduction and fixing screw 2 can be engaged with the cylindrical placement groove a and is not affected by the adjusting groove 112.

[0050] In a preferred embodiment, as shown in the attached Figure 1 , Attachment Figure 2 and attached Figure 3As shown, a transverse hole 113 connected to the adjustment slot 112 is provided on one side of the main fixation plate 11 close to the vertebral plate, so as to facilitate the suturing of the muscles next to the spinous process of the vertebral plate and eliminate the residual cavity next to the spinous process of the vertebral plate by utilizing the transverse hole 113.

[0051] Spine board reduction and fixation board 1 embodiment:

[0052] The total length of the spinal plate reduction and fixation plate 1 is 20 mm and the thickness is 0.8 mm;

[0053] The main fixing plate 11 is 15 mm long and 4.2 mm wide;

[0054] The auxiliary fixing plate 12 is 0.8 mm thick; the width of the auxiliary fixing plate 12 at one end close to the main fixing plate 11 is 2.4 mm, and the width of the auxiliary fixing plate 12 at one end away from the main fixing plate 11 is 3 mm and the length is 5 mm;

[0055] The distance between the two auxiliary fixing plates 12 away from the main fixing plate 11 is: the narrowest is 3mm and the widest is 9mm;

[0056] The slide groove 112 is adjusted to have a depth of 0.8 mm and a width of 2 mm;

[0057] The diameter of the cylindrical placement groove a is 2.2 mm and the depth is 0.5 mm;

[0058] The minimum diameter of the frustum thread groove b is 2mm, the maximum diameter is 2.2mm, and the depth is 0.3mm;

[0059] The diameter of the transverse hole 113 is 0.6 mm;

[0060] Embodiment 2 of the spinal plate reduction and fixation screw:

[0061] The vertebral plate reduction and fixation screw 2 is 6 mm long, which is suitable for the thickness of the removed vertebral plate spinous process bone, so as to avoid the vertebral plate reduction and fixation screw 2 penetrating the removed vertebral plate spinous process bone to damage the intraspinal tissue, and it can be stably fixed;

[0062] The maximum diameter of the spinal plate reduction and fixation screw 2 is 1.8 mm.

[0063] The maximum diameter of the lower nut 41 is 2.2 mm and the thickness is 0.8 mm;

[0064] The upper nut 42 has a maximum diameter of 2 mm and a thickness of 0.5 mm.

[0065] An operating method of a spinal plate reduction and fixation system includes a spinal plate reduction and fixation system. The specific operating method is as follows:

[0066] Step 1: Use the installation device 3 for grabbing the spinal plate reduction and fixation screw 2 to install a spinal plate reduction and fixation screw 2 into the first installation hole 111 of the main fixation plate 11 in the spinal plate reduction and fixation plate 1, and connect the removed spinous process of the vertebral plate to the main fixation plate 11; at this time, the spinal plate reduction and fixation screw 2 is not locked with the first installation hole 111;

[0067] Step 2: Use the installation device 3 for grabbing the spinal plate reduction and fixing screws 2 to install the two spinal plate reduction and fixing screws 2 into the second installation holes 121 of the two auxiliary fixing plates 12 in the spinal plate reduction and fixing plate 1, and connect the vertebral plate or the inferior articular process bone with the corresponding auxiliary fixing plate 12; at this time, the spinal plate reduction and fixing screws 2 are locked with the second installation holes 121;

[0068] Step 3: According to the size of the gap between the removed vertebral lamina spinous process bone and the stump between the vertebral lamina or the inferior articular process bone, adjust the vertebral lamina resetting and fixing screw 2 installed in the main fixing plate 11, and if necessary, slide the vertebral lamina resetting and fixing screw 2 through the adjusting slide groove 112 to the first mounting hole 111 that meets the requirements, and finally lock the vertebral lamina resetting and fixing screw 2 with the appropriate first mounting hole 111;

[0069] Step 4: according to the stability of the repositioned vertebral lamina spinous process bone, continue to install the vertebral lamina repositioning and fixing screws 2 in the remaining first mounting holes 111 to connect the vertebral lamina spinous process bone with the main fixing plate 11;

[0070] Step 5: The removed lamina spinous process supraspinous ligament is sutured with the normal supraspinous ligament stump, the muscle soft tissue beside the lamina spinous process bone is sutured into the transverse hole 113, the residual cavity beside the lamina spinous process bone is closed, and the muscle fascia beside the spinous process bone is tightly sutured to the supraspinous ligament to reposition and fix the lamina spinous process bone.

[0071] In step 1 to step 4, if the installation instrument 3 clamps the spinal plate reduction and fixing screw 2, first pull the screwdriver 31 of the installation instrument 3 to compress the reset spring 33, and then place the upper nut 42 of the spinal plate reduction and fixing screw 2 between the left caliper 34 and the right caliper 35, so that the left caliper 34 and the right caliper 35 are clamped with the upper nut 42, and then loosen the screwdriver 31 to support the spinal plate reduction and fixing screw 2, so that the spinal plate reduction and fixing screw 2 is clamped between the left caliper 34, the right caliper 35 and the screwdriver 31;

[0072] If the spinal plate reduction and fixation screw 2 is removed, the return spring 33 is compressed by pulling the screwdriver 31 of the installation instrument 3;

[0073] If the vertebral plate reduction and fixing screw 2 is rotated, the screwdriver 31 has a head shape identical to the shape of the groove formed on the end surface of the upper nut 42 of the vertebral plate reduction and fixing screw 2, and the screwdriver 31 or the fixing sleeve 32 is rotated to drive the installation instrument 3 to rotate.

[0074] In steps 1 to 5, it is necessary to prevent the screws from falling out or the installation instrument 3 from shifting and sliding into the spinal canal to injure the spinal nerves during the process of installing the spinal plate reduction and fixation screws 2.

[0075] References:

[0076] 【1】Comparative analysis of the application of lamina spinosa ligament complex reduction technique in spinal canal tumor surgery (with 62 cases analyzed) [J], Journal of Stereotactic and Functional Neurosurgery, 2023, 36 (5): 304-308

[0077] 【2】Application of long-segment lamina-spinous process complex reimplantation for spinal canal reconstruction in long-segment intraspinal tumor surgery [J], Chinese Journal of Clinical Neurosurgery, 2023, 28 (7): 437-439

[0078] 【3】Application of ultrasonic bone knife laminoplasty and lamina bone grafting in spinal canal tumor surgery [J], Chinese Journal of Minimally Invasive Surgery, 2018, 18 (2): 101-103, 109

[0079] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0080] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spinal plate reduction and fixation system, characterized in that: The system comprises: a spinal plate reduction and fixation plate (1), a spinal plate reduction and fixation screw (2), and a mounting instrument (3) for grasping the spinal plate reduction and fixation screw (2); The spinal plate resetting and fixing plate (1) comprises: a main fixing plate (11) and a secondary fixing plate (12); one end of the main fixing plate (11) is fixedly connected to at least two secondary fixing plates (12) to form an integral body; at least three first mounting holes (111) are provided at the central axis of the main fixing plate (11); a second mounting hole (121) is provided at one end of the secondary fixing plate (12) away from the main fixing plate (11); the spinal plate resetting and fixing screws (2) are installed in the first mounting holes (111) and the second mounting holes (121); at least three of the first mounting holes (111) are provided with adjustment grooves (112) for sliding the spinal plate resetting and fixing screws (2); and the head of the spinal plate resetting and fixing screw (2) is provided with a double nut mechanism (4).

2. A spinal plate reduction and fixation system according to claim 1, characterized in that: The double nut mechanism (4) comprises: a lower nut (41) connected to the body of the spinal plate reduction and fixation screw (2) and an upper nut (42) connected to the lower nut (41); the lower nut (41) and the upper nut (42) are both configured in a truncated cone shape, and the maximum diameter of the upper nut (42) is smaller than the maximum diameter of the lower nut (41).

3. A spinal plate reduction and fixation system according to claim 2, characterized in that: The first mounting hole (111) and the second mounting hole (121) are both divided into: a cylindrical placement groove (a) and a truncated cone thread groove (b) along the mounting direction of the spinal plate reduction and fixation screw (2); The spinal plate reduction and fixing screw (2) is threadedly connected to the truncated cone thread groove (b), the maximum diameter of the lower nut (41) is greater than the maximum diameter of the truncated cone thread groove (b), and the maximum diameter of the lower nut (41) is smaller than the diameter of the cylindrical placement groove (a), the lower nut (41) is snap-fitted to the cylindrical placement groove (a), and the thickness of the upper nut (42) is greater than the depth of the cylindrical placement groove (a).

4. A spinal plate reduction and fixation system according to claim 1, characterized in that: The shape of the spinal plate resetting and fixing plate (1) is set to be a Y-shape.

5. A spinal plate reduction and fixation system according to claim 3, characterized in that: The width of the adjusting slide groove (112) is equal to the minimum diameter of the truncated cone thread groove (b), and the width of the adjusting slide groove (112) is smaller than the maximum diameter of the lower nut (41).

6. A spinal plate reduction and fixation system according to claim 2, characterized in that: The installation device (3) comprises: a screwdriver (31) and a fixed sleeve (32), wherein the fixed sleeve (32) is movably sleeved on the handle end of the screwdriver (31), and the handle end of the screwdriver (31) is fixedly connected to the inner wall of the end of the fixed sleeve (32) via a return spring (33), and the end of the fixed sleeve (32) away from the return spring (33) is fixedly connected to a left caliper (34) and a right caliper (35) distributed on both sides of the screwdriver (31), and the left caliper (34) and the right caliper (35) are both clamped with an upper nut (42) at one end away from the fixed sleeve (32).

7. A spinal plate reduction and fixation system according to claim 1, characterized in that: A transverse hole groove (113) communicating with the adjustment sliding groove (112) is formed on a side of the main fixing plate (11) close to the spine plate.

Images