A vertebral body tethering fixation system for treating scoliosis

Abstract

The application relates to the technical field of spinal orthopedic devices, and discloses a vertebral body tethering fixation system for treating scoliosis, which comprises orthopedic screws installed on respective vertebral bodies and an orthopedic rod connecting the respective orthopedic screws, the orthopedic rod being flexible, the orthopedic screw being provided with an installation groove for inserting the flexible orthopedic rod, and the orthopedic screw being provided with a headless bolt for fixing the flexible orthopedic rod, so that the diseased segment has a better activity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinal orthopedic devices, and particularly relates to a vertebral body tethering fixation system for treating scoliosis. BACKGROUND

[0002] Scoliosis is also known as scoliosis, which refers to the deviation of one or several segments in the coronal plane of the whole spine from the body midline and bending to the side, thereby making the coronal plane of the spine into an arc-shaped deformity.

[0003] In the related art, the method for treating scoliosis is to install a rigid metal nail rod device at the deformed position of the spine, and then to correct it. There are many rigid metal nail rod devices on the market, which are all composed of vertebral body screws, rigid metal connecting rods and the like. In use, the screw is screwed into the corresponding spine, and then the rigid metal connecting rod is used to connect the adjacent two screws, thereby achieving internal fixation.

[0004] The existing rigid metal connecting rod and screw are used in combination to correct scoliosis, which causes the loss of activity of the patient's installation rigid metal nail rod device in the diseased segment, and accelerates the degeneration of the adjacent segment, and thus needs to be improved. SUMMARY

[0005] In order to avoid the defects of the traditional rigid metal nail rod device for correcting the spine, the present application provides a vertebral body tethering fixation system for treating scoliosis.

[0006] The vertebral body tethering fixation system for treating scoliosis provided by the present application adopts the following technical scheme:

[0007] The vertebral body tethering fixation system for treating scoliosis comprises orthopedic screws installed on each vertebral body and an orthopedic rod connecting each orthopedic screw, wherein the orthopedic rod is flexible, the orthopedic screw is provided with a mounting groove for inserting the orthopedic rod, and the orthopedic screw is provided with a headless bolt for fixing the orthopedic rod.

[0008] By adopting the above technical scheme, the orthopedic screw is first installed on the convex surface of the scoliosis vertebral body, the orthopedic rod is then connected and fixed with each orthopedic screw through the headless bolt to realize the correction action; before the headless bolt is installed, the orthopedic rod is pulled tight to make the adjacent two orthopedic screws close to each other, that is, to realize the position adjustment of the adjacent two vertebral bodies; the flexible orthopedic rod can be bent when the patient bends forward and backward, so that the patient using the above orthopedic device has a good activity in the diseased segment, and the probability of low back pain is reduced, the degeneration of the adjacent segment is delayed, and even the degeneration of the adjacent segment can be avoided.

[0009] Optionally, a screw washer is arranged on each vertebral body, the screw washer is sleeved outside the orthopedic screw, an installation lug is arranged on the outer circumferential surface of the screw washer, and a connecting screw for being installed on the vertebral body is arranged on the installation lug.

[0010] By using the above technical scheme, the screw washer is first placed on the vertebral body, and then the connecting screw is screwed into the vertebral body through the installation lug, so that the screw washer and the vertebral body are connected, and the screw connection mode can improve the firmness of the two; the screw washer is arranged on the vertebral body, and the screw washer plays a role of "pile foundation" on the vertebral body, the contact area when the orthopedic screw is in contact with the screw washer is greater than the contact area when the orthopedic screw is directly connected with the vertebral body, the cutting resistance of the orthopedic screw under tension after installation is increased, and the loosening effect is achieved; when the orthopedic rod is tensioned to make the two adjacent orthopedic screws close to each other, the "pile foundation" effect can prevent the orthopedic screw from cutting the vertebral bone, and the risk of orthopedic failure is avoided.

[0011] Optionally, a washer installer for installing the screw washer is further included, the washer installer includes an installation pipe, an installation hole is formed in the end face of the installation pipe, an installation ring is arranged on one side of the installation pipe, a clamping pipe is arranged in the installation hole, a clamping piece is arranged at the end of the clamping pipe away from the installation ring, the clamping piece has elasticity, and an operating ring for driving the clamping piece to extend out of the installation hole along the length direction of the installation pipe is rotatably connected to the installation ring; the clamping piece includes a connecting portion connected with the clamping pipe, a clamping portion is arranged on the end face of the connecting portion away from the clamping pipe, the distance between the clamping portion and the axis of the clamping pipe gradually increases away from the clamping pipe, a clamping block is arranged on the inner wall of the clamping portion, a containing groove for the clamping block to be inserted is formed in the screw washer, when the outer wall of the clamping piece is not in contact with the inner wall of the installation hole, the minimum distance between the clamping block and the axis of the installation hole is greater than the radius of the screw washer, and when the clamping portion is in the installation hole, the clamping portion is in contact with the inner wall of the installation hole, and the clamping piece is in a compressed state.

[0012] By using the above technical scheme, the clamping pipe is driven to move, the clamping piece extends out of the installation hole, the clamping piece is reset, the clamping pieces are away from each other, the screw washer can be inserted between the clamping pieces, and the clamping block is embedded in the containing groove; when the clamping piece returns to the installation hole, the clamping pieces are close to each other, and the clamping pieces clamp the screw washer; when the clamping piece enters the installation hole, the screw washer can be prevented from being separated from the clamping pipe.

[0013] Optionally, a long slot-shaped operating sliding groove is formed in the outer circumferential surface of the clamping pipe, the length of the operating sliding groove is consistent with the axis direction of the clamping pipe, an operating block is arranged on the inner wall of the installation ring and inserted into the operating sliding groove, the operating block is slidingly arranged in the operating sliding groove, and the operating ring is threadedly connected with the clamping pipe.

[0014] By adopting the technical scheme, the operation block is located in the operation slot, the clamping pipe is limited, and the clamping pipe cannot rotate relative to the mounting pipe; the operation ring is driven to rotate, the operation ring drives the clamping pipe to rotate, the clamping pipe moves along the axial direction, and the clamping piece extends out of the mounting hole; conversely, the operation ring is driven to rotate in reverse, and the clamping piece returns to the mounting hole.

[0015] Optionally, the positioning device capable of penetrating through the clamping pipe is further included, a positioning block is arranged on the outer circumferential surface of the positioning device, a first positioning slot is arranged on the inner wall of the clamping pipe, the first positioning slot penetrates through the clamping pipe in a direction away from the clamping piece, a second positioning slot is arranged on the inner wall of the clamping pipe, the second positioning slot is in communication with the first positioning slot at one end in the circumferential direction of the clamping pipe, and the positioning block is slidably arranged in the first positioning slot / second positioning slot; when the positioning block is located in the second positioning slot, one end of the positioning device penetrates through the screw washer and extends out of the clamping pipe.

[0016] By adopting the technical scheme, the positioning block is inserted into the first positioning slot, and then the positioning block is moved into the second positioning slot, so that the positioning device is fixedly connected with the washer installer; conversely, the positioning device is separated from the washer installer; when the washer installer is installed on the screw washer and installed on the vertebral body, the positioning device can form a positioning groove on the vertebral body, and the positioning groove plays a guiding role in the subsequent drilling process on the vertebral body; the screw washer implanting process and the positioning hole forming process are performed synchronously, so that the operation steps of the worker are reduced, and the orthopedic time is saved.

[0017] Optionally, a limiting slot is arranged on the end face of the mounting pipe away from the mounting ring, a guide block is arranged on the outer circumferential surface of the mounting pipe, and a guide hole is arranged on the end face of the guide block.

[0018] By adopting the technical scheme, the limiting slot is arranged to limit the screw washer with the mounting lug, so that the screw washer is not easy to rotate around the axis of the mounting pipe, the guide hole is aligned with the connecting hole on the screw washer, and the connecting screw is installed in the connecting hole.

[0019] Optionally, a screw installer for installing the orthopedic screw is further included, the screw installer includes an insertion column capable of being inserted into the clamping pipe, an insertion block is arranged on one side of the insertion column inserted into the clamping pipe, and a mounting slot for inserting the insertion block is arranged on the orthopedic screw.

[0020] By adopting the technical scheme, the insertion block is inserted into the mounting slot, the insertion rod is rotated to drive the orthopedic screw to rotate, and the orthopedic screw is installed on the vertebral body.

[0021] Optionally, the mounting groove has an internal thread, the end of the insert away from the insert block has an insertion hole, the end face of the insert block facing the insert has a slot, the insertion hole has a rod that can be inserted into the slot, and the outer circumferential surface of the rod has an external thread that mates with the internal thread.

[0022] By adopting the above technical solution, the insert is inserted into the installation slot, and the insert rod is rotated to connect and fix the insert rod with the orthopedic screw, making the insert rod and the orthopedic screw a single unit. Then, the orthopedic screw is installed on the vertebral body by rotating the insert rod, and the insert rod is rotated in the opposite direction to separate the insert rod from the orthopedic screw, thus completing the installation of the orthopedic screw. Connecting the insert rod with the orthopedic screw allows the operator to accurately operate the orthopedic screw without being able to see the position of the orthopedic screw inside the installation tube.

[0023] Optionally, it also includes a limiting tube for pressing the orthotic bar, a rotating rod for installing the headless bolt onto the orthotic screw, and a tensioner for tightening the orthotic bar. The end of the limiting tube has a through hole for inserting the rotating rod and the headless bolt, and the end of the limiting tube has a slot for inserting the orthotic bar. The slot extends radially through the limiting tube. When the limiting tube abuts against the screw washer, the distance between the bottom wall of the slot and the bottom wall of the mounting groove is not greater than the diameter of the orthotic bar.

[0024] By adopting the above technical solution, when installing the orthotic rod with the first orthotic screw, the orthotic rod is first placed in the installation groove, and then the limiting tube is put over the head of the orthotic screw to limit the orthotic rod. Then, the headless bolt is installed on the orthotic screw by the rotating rod, so that the orthotic screw and the headless bolt fix the orthotic rod. When installing the orthotic rod with the remaining orthotic screws, the orthotic rod is first placed in the installation groove, and then the limiting tube is put over the head of the orthotic screw. Then, the orthotic rod is tightened by the tensioner. During the tightening process, the orthotic rod applies pressure to the convex surfaces of adjacent vertebrae for correction. The headless bolt is installed on the orthotic screw by the rotating rod, so that the orthotic screw and the headless bolt fix the orthotic rod, and finally the spinal correction of scoliosis is achieved.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. First, install orthotic screws on the convex surface of the scoliotic vertebra. Then, connect and fix the orthotic rod to each orthotic screw in sequence using headless bolts to achieve the corrective action. Before installing the headless bolts, tighten the orthotic rod so that the two adjacent orthotic screws are close to each other, thereby adjusting the position of the two adjacent vertebrae. The orthotic rod is flexible and can bend when the patient's spine is bent forward or backward, allowing the affected segment of the patient using the above orthotic device to have better mobility, reducing the patient's chance of lower back pain, delaying degeneration of adjacent segments, and even preventing degeneration of adjacent segments.

[0027] 2. Before the drilling process, a positioning groove is opened on the cone to guide the drill when it opens the hole, so that the position and angle of the hole opened by the drill is less likely to deviate. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural schematic diagram of an embodiment of this application;

[0030] Figure 2 It is an exploded view highlighting the structure of the screw washer and the orthopedic screw;

[0031] Figure 3 This is a sectional view highlighting the headless bolt structure;

[0032] Figure 4 This is a structural diagram of a washer installer;

[0033] Figure 5 This is an exploded view highlighting the structure of the mounting tube and clamping tube;

[0034] Figure 6 This is a partial structural diagram of the positioner passing through the gasket installer;

[0035] Figure 7 This is a partial structural diagram of the positioner being inserted into the clamping tube;

[0036] Figure 8 This is a partial structural diagram of a drill bit inserted inside a washer installer;

[0037] Figure 9 This is a schematic diagram highlighting the structure of the screw mounter;

[0038] Figure 10 It is an exploded view highlighting the relationship between the screw installer and the orthopedic screw;

[0039] Figure 11 This is a structural diagram highlighting the relationship between the limiting tube, the orthopedic screw, the orthopedic rod, and the tensioner;

[0040] Figure 12 This is a schematic diagram highlighting the structure of the limiting tube.

[0041] Reference numerals: 100, screw washer; 101, punch; 102, receiving groove; 104, mounting ear; 105, countersunk groove; 106, connecting hole; 107, connecting screw; 110, straightening screw; 111, screw shank; 112, screw head; 113, thread groove; 114, mounting groove; 115, positioning groove; 120, straightening bar; 130, headless bolt; 200, washer installer; 201, mounting tube; 202, clamping tube; 203, mounting ring; 204, operating ring; 205, mounting hole; 206, operating block; 207, operating groove; 208, through hole; 209, clamping. 210. Clamping part; 211. Connecting part; 212. Clamping block; 213. First positioning slide groove; 214. Second positioning slide groove; 215. Limiting groove; 216. Guide block; 217. Guide hole; 300. Positioner; 301. Positioning block; 400. Drilling tool; 500. Screw installer; 501. Insert post; 502. Insert block; 503. Insert rod; 504. Insertion hole; 505. Slot; 506. Fixing ring; 507. Operating component; 508. Connecting rod; 600. Limiting tube; 601. Rotating rod; 602. Through hole; 603. Slot; 604. Limiting block; 700. Tensioner. Detailed Implementation

[0042] The following is in conjunction with the appendix Figures 1-12 This application will be described in further detail.

[0043] This embodiment discloses a vertebral tethering fixation system for treating scoliosis. (Refer to...) Figures 1 to 11 A vertebral tethering fixation system for treating scoliosis includes a screw washer 100, an orthopedic screw 110, an orthopedic rod 120, a headless bolt 130, a washer installer 200, a locator 300, a drill 400, a screw installer 500, a limiting tube 600, a rotating rod 601, and a tensioner 700.

[0044] Reference Figure 1 and Figure 2 A screw washer 100 is used to install onto the convex surface of the lateral vertebral body. The screw washer 100 has a punched hole 101 and a receiving groove 102 on its outer circumferential surface. Two mounting ears 104 are fixedly connected to the outer circumferential surface of the screw washer 100, and the two mounting ears 104 are arranged in a circumferential array around the axis of the screw washer 100. A countersunk groove 105 is formed on the mounting ear 104, and a connecting hole 106 is formed on the bottom wall of the countersunk groove 105. The axis of the connecting hole 106 is parallel to the axis of the screw washer 100. A connecting screw 107 passes through the connecting hole 106 and is threaded onto the vertebral body, thus fixing the screw washer 100 to the vertebral body.

[0045] Reference Figure 1 andFigure 2 The orthopedic screw 110 passes through the screw washer 100 and is installed on the convex surface of the scoliotic vertebra. The orthopedic screw 110 is a vertebral screw. The surface of the orthopedic screw 110 is coated with a hydroxyapatite coating, which improves the biocompatibility and pull-out resistance of the orthopedic screw 110. This coating enhances the stability of the connection between the orthopedic screw 110 and the vertebral body after installation.

[0046] Reference Figure 1 and Figure 2 The orthopedic screw 110 includes an integrally formed screw shank 111 and a screw head 112. The screw shank 111 has external threads. The screw head 112 is located on one side of the screw shank 111, and the outer diameter of the screw head 112 is larger than the inner diameter of the punch 101 on the screw washer 100. A threaded groove 113 is formed on the end face of the screw head 112 away from the screw shank 111; that is, the threaded groove 113 contains internal threads. A mounting groove 114 is formed on the end face of the screw head 112 away from the screw shank 111. The mounting groove 114 communicates with the threaded groove 113 and penetrates the screw head 112 radially.

[0047] Reference Figure 1 and Figure 2 Two positioning grooves 115 are formed on the outer circumferential surface of the screw head 112, and the two positioning grooves 115 are distributed in a circumferential array along the screw head 112. The positioning grooves 115 penetrate the screw head 112 towards the end face away from the screw head 112.

[0048] Reference Figure 1 The orthotic rod 120 possesses flexibility, stability, and durability. The orthotic rod 120 can be inserted into the mounting slot 114. The orthotic rod 120 comprises an outer layer and an inner core, the inner core being made of UHMWPE material. The outer layer is fitted over the inner core and is formed by interlacing several first strands and several second strands, with the number of first and second strands being equal. The first strands are made of UHMWPE material, and the second strands are made of PET material. Compared to an orthotic rod made of a single PET material, the orthotic rod 120, employing multiple materials, exhibits increased strength and improved friction between the headless bolt 130 / orthotic screw 110 and the orthotic rod 120.

[0049] Reference Figure 1 The headless bolt 130 can be threaded into the threaded groove 113. The headless bolt 130 mates with the inner wall of the mounting groove 114 to fix the orthopedic rod 120. Furthermore, both the threaded groove 113 and the headless bolt 130 have right-angled trapezoidal tooth profiles, which can prevent loosening when the headless bolt 130 mates with the threaded groove 113. In other embodiments, the tooth profiles of the threaded groove 113 and the headless bolt 130 can also be barbed.

[0050] Reference Figure 1 and Figure 3 In other embodiments, the headless bolt 130 has a storage groove on its end face facing the bottom wall of the mounting groove 114, and a spring and a clamping block are disposed in the storage groove. One end of the spring is fixedly connected to the bottom wall of the storage groove, and the other end of the spring is fixedly connected to the end face of the clamping block. In its natural state, part of the clamping block protrudes outside the storage groove. The clamping block presses the orthotic rod 120, improving the stability of the connection between the orthotic rod 120 and the orthotic screw 110.

[0051] Reference Figure 1 and Figure 3 The headless bolt 130 is installed into the mounting groove 114, causing the clamping block to abut against the orthotic rod 120. As the headless bolt 130 continues to move toward the orthotic rod 120, the clamping block 133 moves toward the bottom wall of the storage groove. At the same time, the spring is compressed and deformed, which increases the force of the clamping block on the orthotic rod 120, making it difficult for the orthotic rod 120 to detach from the orthotic screw 110.

[0052] Reference Figure 1 and Figure 4 The washer installer 200 is used to install the screw washer 100 onto the convex surface of the lateral bending vertebra. The washer installer 200 includes an installation tube 201, a clamping tube 202, an installation ring 203, and an operating ring 204. The end face of the installation tube 201 has an installation hole 205.

[0053] Reference Figure 4 and Figure 6 The end face of the mounting tube 201 away from the mounting ring 203 is also provided with two limiting grooves 215, which are arranged in a circumferential array around the axis of the mounting tube 201. The limiting grooves 215 allow the mounting lug 104 to be inserted.

[0054] Reference Figure 4 and Figure 6 Two guide blocks 216 are fixedly connected to the outer circumferential surface of the mounting tube 201. The two guide blocks 216 are arranged in a circumferential array around the axis of the mounting tube 201. The guide blocks 216 are located on the side of the limiting groove 215 near the mounting ring 203. The end face of the guide block 216 facing the mounting ring 203 has a guide hole 217, which allows the connecting screw 107 to pass through. When the screw washer 100 is clamped by the clamping piece 209 and the mounting ear 104 is inserted into the limiting groove 215, the connecting hole 106 on the mounting ear 104 is aligned with the guide hole 217.

[0055] Reference Figure 4 and Figure 5 The mounting ring 203 is fixedly connected to one end face of the mounting tube 201, and the mounting ring 203 is coaxially arranged with the mounting tube 201. An operating block 206 is fixedly connected to the inner wall of the mounting ring 203.

[0056] Reference Figure 4 and Figure 5 The operating ring 204 is rotatably connected to the side of the mounting ring 203 away from the mounting tube 201, and the operating ring 204 is coaxially arranged with the mounting tube 201. The inner wall of the operating ring 204 is provided with internal threads.

[0057] Reference Figure 4 and Figure 5 The clamping tube 202 passes sequentially through the operating ring 204, the mounting ring 203, and the mounting tube 201. An operating groove 207 is formed on the outer circumference of the clamping tube 202. The operating groove 207 is elongated and its length is parallel to the axis of the clamping tube 202. An operating block 206 is inserted into the operating groove 207 and slidably positioned within it.

[0058] Reference Figure 4 and Figure 5 The clamping tube 202 has an external thread on its outer circumference, and the operating ring 204 is threadedly connected to the clamping tube 202. A through hole 208 is provided on the end face of the clamping tube 202, and four clamping pieces 209 are fixedly connected to one end face of the clamping tube 202. The four clamping pieces 209 are arranged in an array along the axis of the clamping tube 202. In other embodiments, the clamping pieces 209 can also be three, five, or other quantities.

[0059] Reference Figure 4 and Figure 6 The clamping piece 209 includes a clamping portion 210 and a connecting portion 211, with the connecting portion 211 fixedly connected to the end face of the clamping tube 202. The clamping portion 210 is located on the side of the connecting portion 211 away from the clamping tube 202. A clamping block 212 is fixedly connected to the side of the clamping portion 210 facing the axis of the clamping tube 202. The clamping block 212 can be inserted into the receiving groove 102.

[0060] Reference Figure 4 and Figure 6 When the clamping part 210 is located outside the mounting hole 205, the distance between the clamping part 210 and the axis of the clamping tube 202 gradually increases in the direction away from the clamping tube 202. At this time, the minimum distance between the clamping block 212 and the axis of the mounting hole 205 is greater than the radius of the mounting hole 205. When the clamping part 210 is located inside the mounting hole 205, the clamping part 210 is in a compressed state, and the clamping part 210 abuts against the inner wall of the mounting hole 205.

[0061] Reference Figure 4 and Figure 6When the clamping part 210 is located outside the mounting tube 201, the clamping part 210 resets and deforms in a direction away from the axis of the clamping tube 202. The distance between the inner wall of the clamping part 210 and the axis of the clamping tube 202 is greater than the inner diameter of the mounting tube 201.

[0062] Reference Figure 6 and Figure 7 The positioner 300 can pass through the clamping tube 202 and is used to create positioning holes on the convex surface of the lateral vertebral body. Two positioning blocks 301 are fixedly connected to the outer circumference of the positioner 300, and the two positioning blocks 301 are arranged in a circumferential array around the axis of the positioner 300. Two first positioning grooves 213 and two second positioning grooves 214 are formed on the inner wall of the through hole 208. The two first positioning grooves 213 are arranged in a circumferential array along the axis of the clamping tube 202. The first positioning grooves 213 penetrate the clamping tube 202 in a direction away from the clamping piece 209.

[0063] Reference Figure 6 and Figure 7 Each of the two second positioning grooves 214 corresponds to one of the first positioning grooves 213, and the two second positioning grooves 214 are arranged in a circumferential array around the axis of the positioner 300. One end of the second positioning groove 214 along the circumferential direction of the clamping tube 202 communicates with the first positioning groove 213. The positioning block 301 can slide within either the first positioning groove 213 or the second positioning groove 214. One side of the positioner 300 is a pointed part, and when the positioning block 301 is located within the second positioning groove 214, the pointed part passes through the clamping tube 202 and the screw washer 100 on the clamping tube 202.

[0064] Reference Figure 6 and Figure 8 The drill bit 400 is used to drill holes on the convex surface of a laterally curved vertebra. The drill bit 400 can pass through the clamping tube 202. The drill bit 400 is equipped with a cutting edge and a discharge groove. The cutting edge facilitates cutting the vertebra, and the discharge groove facilitates the removal of bone meal generated during drilling. The side of the drill bit 400 away from the cutting edge can be connected to a handle or a drilling machine.

[0065] Reference Figure 9 and Figure 10 The screw installer 500 is used to install the orthopedic screw 110 onto the convex surface of the lateral curvature vertebra. The screw installer 500 includes a post 501, a block 502, and a rod 503. The end of the post 501 has a recess 504. The block 502 is fixedly connected to the end face of the post 501, and the end face of the block 502 facing the post 501 has a slot 505 that passes through the block 502 radially along the post 501. Both the post 501 and the block 502 can pass through the clamping tube 202.

[0066] Reference Figure 9 andFigure 10 An operating element 507 is provided on the end face of the insertion post 501 away from the insertion block 502, and a connecting rod 508 is provided between the operating element 507 and the insertion post 501 to connect the two.

[0067] Reference Figure 9 and Figure 10 One end of the insert rod 503 passes through the insertion hole 504 and is inserted into the slot 505, so that the insert rod 503 protrudes from the slot 505. The other end of the insert rod 503 is inserted into the operating member 507. The surface of the insert rod 503 protruding from the slot 505 has external threads. The insert rod 503 can be threaded with the screw head 112.

[0068] Reference Figure 9 and Figure 10 The outer circumferential surface of the insertion rod 503 is provided with a guide groove, which passes through the insertion rod 503 in a direction away from the insertion block 502.

[0069] Reference Figure 9 and Figure 10 A retaining ring 506 is fitted around the insertion rod 503, located between the insertion post 501 and the operating member 507. One end face of the retaining ring 506 is in contact with the operating member 507, and the other end face is in contact with the insertion post 501, serving a limiting function. A guide block is fixedly connected to the inner wall of the retaining ring 506, and the guide block is slidably disposed in the guide groove. Since the retaining ring 506 is limited along the axial direction of the insertion post 501, rotating the retaining ring 506 can rotate the insertion rod 503. When the insertion rod 503 is connected to / disconnected from the orthopedic screw 110, the insertion rod 503 also moves along the axial direction of the insertion rod 503.

[0070] Reference Figure 11 and Figure 12 The limiting tube 600 is used to limit the orthopedic rod 120 within the mounting groove 114. The end face of the limiting tube 600 has a through hole 602 and a slot 603. The axis of the through hole 602 is the same as the axis of the limiting tube 600, and the inner diameter of the through hole 602 is the same as the screw head 112. Two limiting blocks 604 are fixedly connected to the inner wall of the through hole 602, and the two limiting blocks 604 are arranged in a circumferential array along the limiting tube 600. The limiting blocks 604 can be inserted into the positioning groove 115 of the orthopedic screw 110.

[0071] Reference Figure 11 and Figure 12 The slot 603 is connected to the perforation 602, and the slot 603 passes through the limiting tube 600 radially. The slot 603 allows the orthopedic rod 120 to be inserted.

[0072] Reference Figure 11 and Figure 12A rotating rod 601 is inserted through the hole 602. A hexagonal block is provided on the rotating rod 601. The hexagonal block and the internal hexagonal groove on the headless bolt 130 can cooperate with each other.

[0073] Reference Figure 11 and Figure 12 The tensioner 700 is used to tighten the orthotic rod 120. The tensioner 700 is used during the installation of the second and remaining headless bolts 130. This embodiment takes the installation of the second headless bolt 130 as an example: after the orthotic rod 120 is fixed to the first orthotic screw 110 by the first headless bolt 130, the orthotic rod 120 is placed in the mounting groove 114 of the second orthotic screw 110. Then, the limiting tube 600 is put over the second orthotic screw 110 to limit the orthotic rod 120. Then, the tensioner 700 is used to pull the orthotic rod 120, so that the first orthotic screw 110 moves closer to the second orthotic screw 110, so that the vertebra connected to the first orthotic screw 110 moves closer to the vertebra connected to the second orthotic screw 110, thereby achieving correction between the two adjacent vertebrae.

[0074] The implementation principle of a vertebral tethering fixation system for treating scoliosis according to an embodiment of this application is as follows: First, the screw washer 100 is installed on the washer installer 200, and then the locator 300 is installed on the washer installer 200. The locator 300 is used to position the convex surface of the scoliotic vertebra. Then, the connecting screw 107 is passed through the guide hole 217 and the connecting hole 106 in sequence until the connecting screw 107 is threaded onto the vertebral body, thereby fixing the screw washer 100 to the vertebral body.

[0075] The second step is to remove the locator 300 from the washer installer 200, and then pass the drill 400 through the washer installer 200 to drill a hole in the cone.

[0076] The third step is to remove the drill 400 from the washer installer 200 and install the orthopedic screw 110 onto the convex surface of the lateral vertebral body using the screw installer 500.

[0077] The fourth step is to install the orthotic rod 120 into the orthotic screw 110 at any end, limit the orthotic rod 120 by the limiting tube 600, and install the headless bolt 130 onto the orthotic screw 110 by the rotating rod 601.

[0078] Step 5: Install the orthotic rod 120 into the adjacent orthotic screw 110, limit the orthotic rod 120 with the limiting tube 600, tighten the orthotic rod 120 with the tensioner 700, and install the headless bolt 130 onto the orthotic screw 110 with the rotating rod 601. Step 6: Repeat step 5 until the orthotic rod 120 is connected to all the orthotic screws 110, and cut off any excess orthotic rod 120.

[0079] Screw washers 100 are implanted on the convex surface of the scoliosis vertebra, holes are drilled, and orthopedic screws 110 are implanted. All orthopedic screws 110 are then connected by orthopedic rods 120. Furthermore, by using tensioners 700, pressure is applied to the convex surfaces of adjacent vertebrae to correct and adjust the scoliosis.

[0080] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0081] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A vertebral tethering fixation system for treating scoliosis, characterized in that: It includes orthopedic screws (110) installed on each vertebra and orthopedic rods (120) connecting each orthopedic screw (110). The orthopedic rods (120) are flexible. The orthopedic screws (110) have mounting grooves (114) for inserting the orthopedic rods (120). The orthopedic screws (110) are equipped with headless bolts (130) for fixing the orthopedic rods (120). It also includes screw washers (100) installed on each vertebra, the screw washers (100) being fitted over the orthopedic screws (110), the outer circumferential surface of the screw washers (100) being provided with mounting ears (104), the mounting ears (104) being provided with connecting screws (107) for installation onto the vertebrae; It also includes a washer installer (200) for installing screw washers (100), the washer installer (200) including an installation tube (201), an installation hole (205) opened on the end face of the installation tube (201), an installation ring (203) provided on one side of the installation tube (201), a clamping tube (202) passing through the installation hole (205), a clamping piece (209) provided at the end of the clamping tube (202) away from the installation ring (203), the clamping piece (209) being elastic, and an operating ring (204) rotatably connected to the installation ring (203) for driving the clamping piece (209) to extend out of the installation hole (205) along the length direction of the installation tube (201); the clamping piece (209) includes a connecting part (211) connected to the clamping tube (202), the A clamping part (210) is provided on the end face of the connecting part (211) away from the clamping tube (202). The distance between the clamping part (210) and the axis of the clamping tube (202) gradually increases in the direction away from the clamping tube (202). A clamping block (212) is provided on the inner wall of the clamping part (210). A receiving groove (102) for inserting the clamping block (212) is provided on the screw washer (100). When the outer wall of the clamping piece (209) is not in contact with the inner wall of the mounting hole (205), the minimum distance between the clamping block (212) and the axis of the mounting hole (205) is greater than the radius of the screw washer (100). When the clamping part (210) is in the mounting hole (205), the clamping part (210) abuts against the inner wall of the mounting hole (205), and the clamping piece (209) is in a compressed state. It also includes a locator (300) that can pass through the clamping tube (202). The locator (300) has a locating block (301) on its outer circumferential surface. The clamping tube (202) has a first locating groove (213) on its inner wall. The first locating groove (213) passes through the clamping tube (202) in a direction away from the clamping piece (209). The clamping tube (202) has a second locating groove (214) on its inner wall. One end of the second locating groove (214) along the circumference of the clamping tube (202) is connected to the first locating groove (213). The locating block (301) can be slidably disposed in the first locating groove (213) / second locating groove (214). When the locating block (301) is located in the second locating groove (214), one end of the locator (300) passes through the screw washer (100) and extends out of the clamping tube (202). A limiting groove (215) is provided on the end face of the mounting tube (201) away from the mounting ring (203). A guide block (216) is provided on the outer circumferential surface of the mounting tube (201). A guide hole (217) is provided on the end face of the guide block (216) facing the mounting ring (203). It also includes a screw mounter (500) for mounting orthopedic screws (110), the screw mounter (500) including a post (501) that can be inserted into a clamping tube (202), the side of the post (501) that is inserted into the clamping tube (202) is provided with a plug (502), and the orthopedic screw (110) is provided with a mounting groove (114) for inserting the plug (502); The mounting groove (114) is provided with an internal thread, the end of the insert (501) away from the insert block (502) is provided with an insertion hole (504), the end face of the insert block (502) facing the insert (501) is provided with a slot (505), the insertion hole (504) is provided with a rod (503) that can be inserted into the slot (505), and the outer circumferential surface of the rod (503) is provided with an external thread that mates with the internal thread; The outer circumferential surface of the clamping tube (202) is provided with an operating groove (207) in the shape of an elongated slot. The length of the operating groove (207) is consistent with the axial direction of the clamping tube (202). The inner wall of the mounting ring (203) is provided with an operating block (206) that is inserted into the operating groove (207). The operating block (206) is slidably disposed in the operating groove (207). The operating ring (204) is threadedly connected to the clamping tube (202). It also includes a limiting tube (600) for pressing the orthotic rod (120), a rotating rod (601) for installing the headless bolt (130) onto the orthotic screw (110), and a tensioner (700) for tightening the orthotic rod (120). The end of the limiting tube (600) is provided with a through hole (602) for inserting the rotating rod (601) and the headless bolt (130). The end of the limiting tube (600) is provided with a slot (603) for inserting the orthotic rod (120). The slot (603) passes through the limiting tube (600) radially. When the limiting tube (600) abuts against the screw washer (100), the distance between the bottom wall of the slot (603) and the bottom wall of the mounting groove (114) is not greater than the diameter of the orthotic rod (120).

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