Integrated distal tibial osteotomy positioning and fixation guide system

Abstract

The application discloses an integrated distal tibial osteotomy positioning and fixing guiding system, relates to the technical field of orthopedic surgical instruments, and comprises a positioning plate, wherein the positioning plate comprises a distal bone segment and a proximal bone segment, and the top of the distal bone segment and the top of the proximal bone segment are respectively provided with a first guiding cylinder and a second guiding cylinder for guiding Kirschner wires. The guiding sliding plate in the application can smoothly longitudinally slide along the sliding groove assembly of the side wall of the positioning plate, the guiding sliding plate shields the distal screw hole position in the osteotomy stage and does not deviate from the positioning plate throughout the whole process, the positioning plate can be continuously fixedly connected with the tibia through the Kirschner wire, the distal bone segment is always in a precise constraint state from the preoperative positioning to the completion of the osteotomy, so that the core clinical risk of reduction loss after the osteotomy is avoided, and in the screw placement stage, the distal screw hole can be exposed only by pushing the guiding sliding plate to translate towards the proximal end, without the need of disassembling and reassembling the positioning plate, so that the surgical procedure is greatly simplified.

Description

Technical Field

[0001] This invention relates to the field of orthopedic surgical instruments, and more specifically, to an integrated distal tibial osteotomy positioning and fixation guide system. Background Technology

[0002] Distal tibial osteotomy (supplemental ankle osteotomy) is a core surgical procedure for the clinical treatment of ankle inversion / valgus deformity, post-traumatic distal tibial alignment abnormalities, and early to mid-stage ankle osteoarthritis. By adjusting the distal tibial bony alignment and redistributing the weight-bearing stress on the joint surface, it can effectively relieve joint pain, slow down the process of joint degeneration, and avoid or postpone ankle replacement / fusion surgery.

[0003] In traditional surgical procedures, the location, angle, and screw placement of the osteotomy largely depend on the surgeon's clinical experience and repeated intraoperative fluoroscopic calibration. This not only results in longer surgical times and greater radiation exposure for both doctors and patients, but also makes it difficult to guarantee the accuracy of the osteotomy under manual operation, easily leading to problems such as osteotomy surface deviation, insufficient or excessive correction angle. At the same time, traditional positioning plates completely cover the osteotomy path, and the temporary fixing positioning plates and Kirschner wires must be removed before the osteotomy operation. This causes the distal bone segment to lose its mechanical constraint after the osteotomy, making it prone to displacement and rotation due to muscle traction and surgical operation, resulting in loss of reduction and deviation of force line, which directly affects the postoperative correction effect and may even lead to complications such as nonunion, malunion, and chronic pain.

[0004] Currently, while some osteotomy guiding instruments and 3D-printed personalized guides have emerged in clinical practice to improve surgical precision, existing solutions still have significant drawbacks: 3D-printed patient-specific guides require individual pre-operative customization, resulting in long production cycles and high costs, and the osteotomy height and angle cannot be flexibly adjusted intraoperatively according to the actual situation, limiting clinical adaptability; separate osteotomy guides and screw placement guides are two independent sets of instruments, and the cumulative errors from two bone-fitting positioning processes can easily lead to conflicts between the screw path and the osteotomy surface, and the operation still relies on the "disassembly and reassembly" logic, failing to fundamentally address the core problem of distal bone segment loss after osteotomy. Therefore, an integrated distal tibial osteotomy positioning and fixation guiding system is urgently needed to solve the above problems. Summary of the Invention

[0005] To address the problems in related technologies, this invention proposes an integrated distal tibial osteotomy positioning and fixation guidance system to overcome the aforementioned technical problems existing in the current related technologies.

[0006] The technical solution of this invention is implemented as follows: An integrated distal tibial osteotomy positioning and fixation guide system includes a positioning plate, which includes a distal bone segment and a proximal bone segment. A first guide tube and a second guide tube for guiding Kirschner wires are respectively inserted into the top of the distal bone segment and the top of the proximal bone segment. The first guide tube on the distal bone segment and the second guide tube on the proximal bone segment are both distributed in an X-shape. The positioning plate has a T-shaped cross-section, and the width of the proximal bone segment is greater than the width of the distal bone segment. The top of the distal bone segment is provided with an osteotomy window to facilitate osteotomy surgery, and the inner walls on both sides of the osteotomy window are provided with limiting grooves for limiting the osteotomy oscillating saw. The top of the positioning plate is equipped with a sliding adjustment component that allows for sliding clearance instead of the clearance required for traditional surgical disassembly.

[0007] Preferably, the sliding adjustment assembly includes a guide sliding plate slidably connected to the outer walls of both sides of the positioning plate. Both outer walls of the positioning plate are provided with a groove assembly to ensure stable displacement of the guide sliding plate. One side of the guide sliding plate is provided with a self-locking assembly that keeps it stationary after sliding to a designated position. Both outer walls of the guide sliding plate are provided with first anti-slip grooves that are evenly distributed.

[0008] Preferably, the slide rail assembly includes a main displacement section, a first locking groove, a front section, a first ramp section, a second locking groove, a second ramp section, and a rear section. The first ramp section is located between the front section and the main displacement section, and the second ramp section is located between the main displacement section and the rear section. The first ramp section is located on the upper side of the front section, and the second ramp section is located on the lower side of the rear section. The first locking groove and the second locking groove are both formed on the bottom inner wall of the main displacement section, and the first locking groove and the second locking groove are respectively disposed on the left and right sides of the main displacement section.

[0009] Preferably, the self-locking assembly includes extension blocks fixedly connected to the outer walls of both sides of the guide sliding plate. A rotating shaft is rotatably connected inside the extension block. A swing rod is fixedly connected to one end of the rotating shaft extending outside the extension block. The swing rod includes a connecting rod portion, a first circular block portion, and a second circular block portion. A fixed shaft is fixedly connected to the first circular block portion of the swing rod. A circular plate is rotatably connected to the other end of the fixed shaft. A telescopic assembly is fixedly connected to one side of the circular plate. A rolling block is fixedly connected to the output end of the telescopic assembly. The rolling block is engaged inside the first locking groove. The specifications of the first locking groove are the same as those of the second locking groove. A swing groove is provided on one side of the extension block to facilitate the swing of the rolling block along the axis of the rotating shaft. A limiting assembly is provided on one side of the extension block to limit the swing position of the rolling block.

[0010] Preferably, the limiting component includes a fixed post fixedly connected to the outer wall of one side of the extension block, an elastic sheet fixedly connected to the outer circumference of the fixed post, the elastic sheet having an L-shaped cross-section, a V-shaped groove being formed on the outer circumference of the second circular block portion in the swing rod, and a stop bar for blocking and limiting the elastic sheet being fixedly connected to the inner wall of one side of the V-shaped groove, with one end of the elastic sheet abutting against the outer wall of one side of the stop bar.

[0011] Preferably, the outer circumference of the second circular block portion in the swing arm is provided with a groove for engaging and limiting the elastic sheet after the rolling block swings, and the cross-section of the groove is U-shaped.

[0012] Preferably, the telescopic assembly includes a connecting cylinder fixedly connected to the outer wall of one side of the circular plate, a sliding plate slidably connected to the inner wall of one side of the connecting cylinder, a spring fixedly connected to the outer wall of one side of the sliding plate, the other end of the spring fixedly connected to the inner wall of one side of the connecting cylinder, a sliding column fixedly connected to the outer wall of the sliding plate away from the spring, and the other end of the sliding column fixedly connected to the outer wall of one end of the rolling block.

[0013] Preferably, a key rod is fixedly connected to the outer circumferential wall of the slide column to prevent the slide column from rotating, and a key groove that mates with the key rod is provided at one end of the connecting cylinder.

[0014] Preferably, a ramp block is fixedly connected to one side inner wall of the rear section, and the thickness of the ramp block gradually increases in the direction away from the second locking groove until it is flush with the side wall surface of the positioning plate.

[0015] Preferably, the top outer wall of the distal bone segment is provided with a second locking bolt hole, which is distributed in a V-shape on the outer wall of the distal bone segment. The top outer wall of the proximal bone segment is provided with a first locking bolt hole, which is distributed in an arc shape on the outer wall of the proximal bone segment. The positioning plate has multiple second anti-slip grooves on the side away from the guide sliding plate, and the cross-section of the second anti-slip groove is wavy.

[0016] The beneficial effects of this invention are: The integrated distal tibial osteotomy positioning and fixation guide system provided by this invention, through a sliding adjustment component consisting of a guide sliding plate and a sliding groove assembly, replaces the traditional disassembly and repositioning operation mode in osteotomy surgery with a sliding repositioning method. This breaks the inherent contradiction that the positioning plate will obstruct the osteotomy path and that the plate must be removed before osteotomy. At the same time, traditional distal tibial osteotomy requires a multi-step cycle of "plate placement, plate removal and osteotomy, and re-fixation". The secondary alignment process not only greatly prolongs the operation time, but also causes the distal bone segment to lose temporary restraint, making it prone to displacement and rotation, resulting in loss of repositioning and directly affecting the postoperative force line correction effect. In this solution, the guide sliding plate can slide along the positioning plate The sidewall sliding assembly slides smoothly longitudinally. During the osteotomy stage, the guide sliding plate covers the distal screw holes and remains in place throughout the procedure. The positioning plate can be continuously fixed to the tibia via Kirschner wires, ensuring that the distal bone segment is in a precise constrained state from preoperative positioning to completion of osteotomy. This avoids the core clinical risk of loss of reduction after osteotomy. During the screw placement stage, the distal screw holes can be exposed simply by pushing the guide sliding plate proximally, without the need to disassemble and reinstall the positioning plate. This significantly simplifies the surgical procedure, shortens the time for soft tissue exposure and periosteal stripping, and effectively reduces the probability of intraoperative infection and delayed bone healing. It also reduces the number of times intraoperative fluoroscopy is required for alignment, thus reducing the radiation exposure time for both doctors and patients.

[0017] The integrated distal tibial osteotomy positioning and fixation guide system provided by this invention, through a self-locking assembly consisting of a swing rod, a telescopic component, a rolling block, and an elastic limiting component, combined with a sliding groove assembly with double locking grooves and segmented ramps, achieves automatic and precise locking of the osteotomy position and the screw placement position. This effectively solves the problems of traditional sliding guide structures requiring additional tools for locking, poor locking reliability, and susceptibility to displacement due to surgical vibration. In the initial osteotomy position, the spring force of the telescopic component pushes the rolling block to automatically engage in the first locking groove. With the reverse limiting structure of the elastic plate and the stop bar, it can effectively resist the external force interference from the vibration of the swing saw and the contact of instruments during osteotomy, avoid the accidental slippage of the guide sliding plate, and ensure the baseline stability of the osteotomy operation. After sliding to the screw placement position, the rolling block can automatically engage in the second locking groove under the action of the spring to complete the secondary locking, without the need for additional manual locking operation. This not only ensures the alignment accuracy of the distal screw hole during screw placement but also simplifies the operation steps. After the proximal and distal bone segments are permanently locked and fixed, the medical staff remove all the temporary fixation Kirschner wires, release the temporary constraint between the positioning plate and the bone surface, and continue to push the guide sliding plate towards the rear section of the slide assembly towards the proximal bone segment. After the rolling block slides out of the second locking groove, it will pass through the second ramp section. At this time, the rolling block will be lifted by the second ramp section and swing. At this time, the swing rod will also drive the second circular block to rotate. At this time, the elastic plate will separate from the stop bar and lock into the slot to achieve self-locking again, preventing the rolling block from being subjected to elastic force. The elastic plate swings downwards again, and at the same time, the thickness of the ramp block set in the rear section gradually increases along the sliding direction. This will gradually compress the rolling block and the internal telescopic components. Finally, the guide sliding plate can completely detach from the side wall of the positioning plate along the smooth transition surface of the ramp block, thereby completing the removal of all auxiliary guide components. Only the positioning plate is left on the bone surface to provide permanent support and fixation. There is no need to go through the cycle of "plate removal, reinstallation, and secondary alignment" in the traditional procedure. This fundamentally solves the core clinical risks of distal bone segment displacement and loss of repositioning after osteotomy. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall front top view of the present invention.

[0020] Figure 2 For the present invention Figure 1 A magnified structural diagram of point A in the middle.

[0021] Figure 3 This is a schematic diagram of the side structure of the positioning plate after the guide sliding plate of the present invention has been disassembled.

[0022] Figure 4 This is a schematic diagram of the overall bottom structure of the present invention.

[0023] Figure 5 For the present invention Figure 4 A magnified structural diagram at point B in the middle.

[0024] Figure 6 This is a partial cross-sectional view of the extension block and positioning plate of the present invention.

[0025] Figure 7 For the present invention Figure 6 A magnified structural diagram at point B in the middle.

[0026] Figure 8This is a schematic diagram of the overall structure of the guide sliding plate of the present invention after it slides into the second locking groove.

[0027] Figure 9 This is a schematic diagram of the structure of the guide sliding plate sliding to the split point in this invention.

[0028] Figure 10 For the present invention Figure 9 A magnified structural diagram at point C.

[0029] In the picture: 1. Positioning plate; 101. Distal bone segment; 102. Proximal bone segment; 2. Guide sliding plate; 3. Osteotomy window; 4. First guide cylinder; 5. Limiting groove; 6. First anti-slip groove; 7. Slide assembly; 701. Main displacement section; 702. First locking groove; 703. Front section; 704. First ramp section; 705. Second locking groove; 706. Second ramp section; 707. Rear section; 708. Ramp block; 8. 9. Second guide cylinder; 10. First locking bolt hole; 11. Extension block; 12. Connecting cylinder; 13. Swing groove; 14. Rotating shaft; 15. Circular plate; 16. Fixed shaft; 17. Swing rod; 18. Fixed column; 19. Elastic sheet; 20. V-groove; 21. Stop bar; 22. Slot; 23. Second anti-slip groove; 24. Rolling block; 25. Sliding column; 26. Slide plate; 27. Spring; 28. Second locking bolt hole. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0031] Please see Figures 1-10 An integrated distal tibial osteotomy positioning and fixation guide system includes a positioning plate 1. The positioning plate 1 includes a distal bone segment 101 and a proximal bone segment 102. A first guide cylinder 4 and a second guide cylinder 8 for guiding Kirschner wires are respectively inserted into the top of the distal bone segment 101 and the top of the proximal bone segment 102. The first guide cylinder 4 on the distal bone segment 101 and the second guide cylinder 8 on the proximal bone segment 102 are both distributed in an X-shape. The cross-section of the positioning plate 1 is T-shaped, and the width of the proximal bone segment 102 is greater than the width of the distal bone segment 101. The top of the distal bone segment 101 is provided with an osteotomy window 3 to facilitate osteotomy surgery. The inner walls on both sides of the osteotomy window 3 are provided with limiting grooves 5 for limiting the osteotomy oscillating saw. The top of the positioning plate 1 is equipped with a sliding adjustment component that replaces the traditional surgical disassembly and repositioning method by sliding and yielding. The positioning plate 1 can be inserted with Kirschner wires through the first guide cylinder 4 and the second guide cylinder 8, which are distributed in an X shape, to form a multi-planar spatial holding force. Combined with the T-shaped structure that is wide at the proximal end and narrow at the distal end, it significantly improves the anti-rotation stability after bone attachment. At the same time, the osteotomy window 3 provides operating space for osteotomy operation, and the limiting grooves 5 on both sides can constrain the offset and cutting depth of the osteotomy oscillating saw, ensuring osteotomy accuracy and avoiding excessive cutting of the saw blade and damage to the posterior soft tissue. The sliding adjustment component replaces the traditional surgical disassembly and repositioning method by sliding and yielding, so that the positioning plate 1 can maintain a fixed connection with the tibia throughout the osteotomy, fundamentally avoiding the clinical risk of loss of the distal bone segment 101 after osteotomy.

[0032] Furthermore, the sliding adjustment assembly includes guide sliding plates 2 slidably connected to the outer walls of both sides of the positioning plate 1. Both outer walls of the positioning plate 1 are provided with groove components 7 to ensure the stable displacement of the guide sliding plates 2. One side of the guide sliding plate 2 is provided with a self-locking component that remains stationary after sliding to a designated position. Both outer walls of the guide sliding plate 2 are provided with first anti-slip grooves 6 evenly distributed. The guide sliding plate 2 can smoothly slide longitudinally along the groove components 7 on the side wall of the positioning plate 1, covering the distal screw hole in the osteotomy position and exposing the distal screw hole in the screw placement position. The sliding plate 2 does not detach from the positioning plate 1 throughout the entire sliding process, and the position switching can be completed without disassembly and reassembly. The self-locking component can automatically lock after the guide sliding plate 2 slides to the designated position to resist intraoperative vibration and instrument contact interference and ensure the stability of the position reference.

[0033] Furthermore, the slide assembly 7 includes a main displacement section 701, a first locking groove 702, a front section 703, a first ramp section 704, a second locking groove 705, a second ramp section 706, and a rear section 707. The first ramp section 704 is located between the front section 703 and the main displacement section 701, and the second ramp section 706 is located between the main displacement section 701 and the rear section 707. The first ramp section 704 is located above the front section 703, and the second ramp section 706 is located below the rear section 707. The first locking groove 702 and the second locking groove 705 are both formed on the bottom inner wall of the main displacement section 701. 705 is respectively set on the left and right sides of the main displacement section 701. The main displacement section 701 provides a stable longitudinal sliding path for the guide sliding plate 2. The first locking groove 702 and the second locking groove 705 correspond to the two core work stations of osteotomy and pin placement, respectively. With the help of the self-locking component, the dual work station can be accurately positioned. The first ramp section 704 and the second ramp section 706 can make the rolling block 23 smoothly transition between the locking groove and the main displacement section 701, avoiding sliding jamming and hard impact. The rear section 707 can work with the ramp block 708 to realize the smooth separation of the guide sliding plate 2 and the positioning plate 1, fully adapting to the work station switching requirements of the entire process from osteotomy, pin placement to plate removal.

[0034] Furthermore, the self-locking assembly includes extension blocks 10 fixedly connected to the outer walls of both sides of the guide sliding plate 2. A rotating shaft 13 is rotatably connected inside the extension blocks 10. A rocker arm 16 is fixedly connected to one end of the rotating shaft 13 extending outside the extension blocks 10. The rocker arm 16 includes a connecting rod portion, a first circular block portion, and a second circular block portion. A fixed shaft 15 is fixedly connected to the first circular block portion of the rocker arm 16. A circular plate 14 is rotatably connected to the other end of the fixed shaft 15. A telescopic assembly is fixedly connected to one side of the circular plate 14. A rolling block 23 is fixedly connected to the output end of the telescopic assembly. The rolling block 23 engages inside the first locking groove 702. The specifications of the first locking groove 702 are the same as those of the second locking groove 705. A facilitator is provided on one side of the extension blocks 10 to facilitate rolling. The moving block 23 swings along the axis of the rotating shaft 13 via the swing groove 12. One side of the extension block 10 is provided with a limiting component for limiting the swing position of the rolling block 23. The extension block 10 provides an installation carrier for the self-locking component. The rotating shaft 13 supports the swing rod 16 to achieve fixed-axis swing. Then, through the fixed shaft 15 and the circular plate 14, the telescopic component and the rolling block 23 swing synchronously. At the same time, the rolling block 23 is inserted into the corresponding locking groove under the pushing action of the telescopic component, which can realize the station locking of the guide sliding plate 2. The swing groove 12 provides clearance space for the swing of the rolling block 23. The limiting component can limit the rotation angle of the swing rod 16, ensuring that the rolling block 23 will not accidentally come out in the locked state, effectively improving the locking reliability and anti-interference ability.

[0035] Furthermore, the limiting component includes a fixed post 17 fixedly connected to the outer wall of one side of the extension block 10. An elastic sheet 18 is fixedly connected to the outer circumference of the fixed post 17. The cross-section of the elastic sheet 18 is L-shaped. A V-shaped groove 19 is opened on the outer circumference of the second circular block in the swing rod 16. A stop bar 20 for blocking and limiting the elastic sheet 18 is fixedly connected to the inner wall of one side of the V-shaped groove 19. One end of the elastic sheet 18 is pressed against the outer wall of one side of the stop bar 20. The fixed post 17 provides fixed support for the elastic sheet 18. The end of the L-shaped elastic sheet 18 is pressed against the stop bar 20, which can prevent the swing rod 16 from rotating in the opposite direction, thereby limiting the rolling block 23 from swinging upward and disengaging from the locking groove, realizing the one-way self-locking of the osteotomy position. The V-shaped groove 19 provides space for the deformation and clearance of the elastic sheet 18. This structure can automatically maintain the locked state without additional operation and can effectively resist the external force interference of the swing saw vibration and instrument scraping during the osteotomy process.

[0036] Furthermore, the outer circumference of the second circular block portion in the rocker arm 16 is provided with a groove 21 for engaging and limiting the elastic piece 18 after the rolling block 23 swings. The groove 21 has a U-shaped cross-section. When the guide sliding plate 2 slides to the rear section 707 area and the rolling block 23 is lifted to drive the rocker arm 16 to swing, the elastic piece 18 can be engaged in the U-shaped groove 21 to form a reverse limit on the rocker arm 16, so that the rolling block 23 is kept in the raised state, preventing it from rebounding and swinging down under the action of the spring force of the spring 26, ensuring that the subsequent process of the guide sliding plate 2 disengaging from the positioning plate 1 is smooth and without jamming, and realizing the self-holding of the unlocked state.

[0037] Furthermore, the telescopic assembly includes a connecting cylinder 11 fixedly connected to the outer wall of one side of the circular plate 14. A sliding plate 25 is slidably connected to the inner wall of one side of the connecting cylinder 11. A spring 26 is fixedly connected to the outer wall of one side of the sliding plate 25. The other end of the spring 26 is fixedly connected to the inner wall of one side of the connecting cylinder 11. A sliding column 24 is fixedly connected to the outer wall of the sliding plate 25 away from the spring 26. The other end of the sliding column 24 is fixedly connected to the outer wall of one end of the rolling block 23. The connecting cylinder 11 provides a space for the telescopic structure. The spring 26 continuously applies an outward elastic force to the sliding plate 25, thereby pushing the rolling block 23 to always keep it close to the bottom surface of the sliding groove assembly 7 through the sliding column 24. When the rolling block 23 moves to the locking groove position, it can automatically lock under the action of the spring 26.

[0038] Furthermore, a key rod is fixedly connected to the outer circumferential wall of the slide column 24 to prevent the slide column 24 from rotating. One end of the connecting cylinder 11 is provided with a key groove that cooperates with the key rod. The key rod on the outer wall of the slide column 24 and the key groove at the end of the connecting cylinder 11 cooperate with each other to limit the circumferential rotation of the slide column 24 and the rolling block 23, ensuring that the rolling direction of the rolling block 23 is always consistent with the extension direction of the slide groove assembly 7, avoiding the rolling block 23 from deflecting and getting stuck, and effectively improving the smoothness of the sliding process of the guide sliding plate 2 and the accuracy of the locking action.

[0039] Furthermore, a ramp block 708 is fixedly connected to one inner wall of the rear section 707. The thickness of the ramp block 708 gradually increases in the direction away from the second locking groove 705 until it is flush with the side wall of the positioning plate 1. The thickness of the ramp block 708 in the rear section 707 increases in the direction away from the second locking groove 705. When the guide sliding plate 2 slides to the rear section 707, the rolling block 23 moves along the inclined surface of the ramp block 708, and the telescopic component is gradually compressed. Finally, the rolling block 23 is completely retracted to a position flush with the side wall of the positioning plate 1, so that the guide sliding plate 2 can completely detach from the positioning plate 1 along the smooth transition surface, realizing the removal of the auxiliary guide component without jamming.

[0040] Furthermore, a second locking bolt hole 27 is provided on the top outer wall of the distal bone segment 101, and the second locking bolt hole 27 is distributed in a V-shape on the outer wall of the distal bone segment 101. A first locking bolt hole 9 is provided on the top outer wall of the proximal bone segment 102, and the first locking bolt hole 9 is distributed in an arc shape on the outer wall of the proximal bone segment 102. Multiple second anti-slip grooves 22 are provided on the side of the positioning plate 1 away from the guide sliding plate 2. The cross-section of the second anti-slip groove 22 is wavy. The V-shaped second locking bolt holes 27 can form a multi-directional three-dimensional holding force, effectively resisting the shear force and torsional stress at the osteotomy end, and improving the fixation stability of the distal free bone block. Meanwhile, the arc-shaped first locking bolt holes 9 on the proximal bone segment 102 can adapt to the morphology of the proximal tibial bone surface and achieve multi-point uniform fixation. At the same time, the wavy second anti-slip groove 22 on the bottom surface of the positioning plate 1 can increase the friction with the bone cortex, further enhancing the anti-slip and anti-rotation performance of the temporary fixation of the positioning plate 1.

[0041] In summary, with the help of the above-mentioned technical solution of the present invention, when in use, the positioning plate 1 with the pre-assembled guide sliding plate 2 is first attached to the preset surgical position at the distal end of the tibia. After calibrating the lower limb force line and osteotomy height by intraoperative fluoroscopy, Kirschner wires are inserted through the first guide cylinder 4 on the distal bone segment 101 and the second guide cylinder 8 on the proximal bone segment 102 to complete the temporary rigid fixation of the positioning plate 1 and the tibia. The first guide cylinder 4 and the second guide cylinder 8 are both X-shaped and cross-distributed. The inserted Kirschner wires can form a multi-planar spatial holding force. Combined with the T-shaped positioning plate 1 structure that is wide at the proximal end and narrow at the distal end, it can significantly enhance the anti-rotation stability after bone attachment and avoid displacement and deflection of the positioning plate 1 during surgery. At the same time, the wave-shaped second anti-slip groove 22 on the bottom surface of the positioning plate 1 can increase the friction with the bone cortex and further improve the reliability of the temporary fixation. At this time, the guide sliding plate 2 is in the initial distal position, and its plate surface completely covers the second locking bolt hole 27 of the distal bone segment 101. The self-locking component is in an automatic locking state. In the initial locked state, the spring 26 inside the telescopic assembly continuously applies an outward pushing force to the rolling block 23 through the slide plate 25 and the slide column 24, so that the rolling block 23 is tightly locked into the first locking groove 702 of the slide groove assembly 7. At the same time, the stop bar 20 on the rocker arm 16 abuts against the end of the L-shaped elastic sheet 18, restricting the rocker arm 16 from rotating in the opposite direction around the pivot 13, preventing the rolling block 23 from accidentally coming out of the locking groove due to osteotomy vibration or instrument contact, ensuring that the guide sliding plate 2 will not shift during osteotomy, and continuously and stably blocking the distal screw hole. This self-locking structure can achieve station locking without additional tools, which is convenient to operate and has high reliability in preventing accidental contact. Once temporary fixation is complete, medical staff can perform osteotomy. The osteotomy oscillating saw is inserted into the osteotomy window 3 opened in the distal bone segment 101 of the positioning plate 1, and the tibia is cut along the bone surface. The limiting grooves 5 on both sides of the inner wall of the osteotomy window 3 can precisely constrain the lateral deviation and cutting depth of the oscillating saw, ensuring that the osteotomy surface is flat and smooth, and preventing the saw blade from excessively cutting and damaging the blood vessels, nerves and other soft tissues behind the tibia, thus improving the safety of the operation. Moreover, through the set sliding adjustment component, it is different from the traditional procedure that requires the removal of the positioning plate before osteotomy. Throughout the osteotomy process, the positioning plate 1 is fixedly connected to the tibia by Kirschner wires, and the spatial position and correction angle of the distal bone segment 101 are always precisely constrained, eliminating the core clinical risks of distal bone fragment displacement and loss of repositioning during osteotomy from the root. After the patient's osteotomy is completed, medical staff hold the guide sliding plate 2 and move it towards the proximal bone segment 102. During the horizontal movement of the guide sliding plate 2, the rolling block 23 rolls upwards along the slope of the first locking groove 702 to the main displacement segment 701. Then, the staff continues to move the guide sliding plate 2. When the rolling block 23 moves to the second locking groove 705, it is instantly locked into the second locking groove 705 by the downward elastic force of the elastic piece 18, thus realizing the self-locking mechanism after the guide sliding plate 2 slides. The guide sliding plate 2 is precisely locked in place at the proximal position, preventing accidental slippage of the slide plate 25 due to external force or instrument friction during subsequent screw placement. This ensures the accuracy of the distal screw hole exposure and consistency with the screw placement reference. Simultaneously, the guide sliding plate 2 has been completely removed from the screw hole area of ​​the distal bone segment 101, exposing the second locking bolt holes 27, which were previously completely obscured by the plate surface. The multiple screw holes, arranged in a V-shape, maintain a preset, precise relative position with the osteotomy window 3, providing a permanent fixation for the distal free bone segment. With standardized and precise screw placement guidance, medical staff can first insert permanent locking screws one by one through the exposed second locking bolt holes 27 to firmly lock the distal bone segment 101 after osteotomy to the positioning plate 1. The V-shaped arrangement of screws can form a multi-directional three-dimensional holding force, effectively resisting the shear force and torsional stress at the osteotomy end, significantly improving the fixation stability of the distal free bone fragment, and avoiding postoperative rebound of the correction angle. After completing the distal fixation, locking screws are then inserted through the arc-shaped first locking bolt holes 9 on the proximal bone segment 102 to complete the proximal fixation. The permanent rigid connection between bone segment 102 and positioning plate 1, since all locking bolt holes, osteotomy window 3 and positioning plate 1 are integrated processing structures, share the same spatial coordinate system and processing benchmark, the relative position of osteotomy line and screw insertion path is precisely locked at the factory. From the design level, it completely avoids the problems of screw track falling into osteotomy surface and screw and osteotomy line overlapping and conflicting, which are common in traditional separate instruments. It not only ensures the mechanical strength of bone fixation, but also eliminates the tedious operation of repeatedly adjusting the screw position by fluoroscopy during operation, and reduces the radiation exposure time of doctors and patients. After the proximal and distal bone segments 102 are permanently locked and fixed, the medical staff remove all the temporary fixation Kirschner wires, release the temporary constraint between the positioning plate 1 and the bone surface, and continue to push the guide sliding plate 2 towards the rear section 707 of the slide groove assembly 7 towards the proximal bone segment 102. After the rolling block 23 slides out of the second locking groove 705, it will pass through the second ramp section 706. At this time, the rolling block 23 will be lifted by the second ramp section 706 and swing. At this time, the swing rod 16 will also drive the second circular block to rotate. At this time, the elastic plate 18 will separate from the stop strip 20 and lock into the slot 21 to achieve self-locking again, preventing the rolling block 23 from swinging down again due to the elastic force of the elastic plate 18. At the same time, the ramp block 70 in the rear section 707 8. The thickness gradually increases along the sliding direction, which will gradually compress the rolling block 23 and the internal telescopic components. Finally, the guide sliding plate 2 can completely detach from the side wall of the positioning plate 1 along the smooth transition surface of the ramp block 708, thereby completing the removal of all auxiliary guide components. Only the positioning plate 1 is left on the bone surface to provide permanent support and fixation. There is no need to go through the cycle of "plate removal, reinstallation, and secondary alignment" in the traditional procedure. This not only solves the core clinical risks of displacement and loss of reduction of distal bone segment 101 after osteotomy from the root, but also significantly simplifies the surgical steps, shortens the soft tissue exposure time, and reduces the probability of intraoperative infection and periosteal stripping injury. At the same time, the overall operation logic is in line with the routine surgical procedures in orthopedic clinics, the learning curve of doctors is gentle, and it is easy to promote and apply in clinical practice.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated distal tibial osteotomy positioning and fixation guide system, comprising a positioning plate (1), characterized in that, The positioning plate (1) includes a distal bone segment (101) and a proximal bone segment (102). A first guide cylinder (4) and a second guide cylinder (8) for guiding Kirschner wires are respectively inserted into the top of the distal bone segment (101) and the top of the proximal bone segment (102). The first guide cylinder (4) on the distal bone segment (101) and the second guide cylinder (8) on the proximal bone segment (102) are both distributed in an X shape. The positioning plate (1) has a T-shaped cross-section, and the width of the proximal bone segment (102) is greater than the width of the distal bone segment (101). The top of the distal bone segment (101) is provided with an osteotomy window (3) to facilitate osteotomy surgery, and the inner walls on both sides of the osteotomy window (3) are provided with limiting grooves (5) for limiting the osteotomy oscillating saw. The top of the positioning plate (1) is provided with a sliding adjustment component that replaces the traditional surgical disassembly clearance by sliding clearance.

2. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 1, characterized in that, The sliding adjustment assembly includes a guide sliding plate (2) slidably connected to the outer walls of both sides of the positioning plate (1). Both outer walls of the positioning plate (1) are provided with a groove assembly (7) to ensure the stable displacement of the guide sliding plate (2). One side of the guide sliding plate (2) is provided with a self-locking assembly that remains stationary after sliding to a specified position. Both outer walls of the guide sliding plate (2) are provided with first anti-slip grooves (6) distributed at equal intervals.

3. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 2, characterized in that, The slide assembly (7) includes a main displacement section (701), a first locking groove (702), a front section (703), a first ramp section (704), a second locking groove (705), a second ramp section (706), and a rear section (707). The first ramp section (704) is located between the front section (703) and the main displacement section (701), and the second ramp section (706) is located between the main displacement section (701) and the rear section (707). The first ramp section (704) is located on the upper side of the front section (703), and the second ramp section (706) is located on the lower side of the rear section (707). The first locking groove (702) and the second locking groove (705) are both formed on the bottom inner wall of the main displacement section (701). The first locking groove (702) and the second locking groove (705) are respectively provided on the left and right sides of the main displacement section (701).

4. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 3, characterized in that, The self-locking assembly includes extension blocks (10) fixedly connected to the outer walls of both sides of the guide sliding plate (2). A rotating shaft (13) is rotatably connected inside the extension block (10). A rocker arm (16) is fixedly connected to one end of the rotating shaft (13) extending outside the extension block (10). The rocker arm (16) includes a connecting rod portion, a first circular block portion, and a second circular block portion. A fixed shaft (15) is fixedly connected to the first circular block portion of the rocker arm (16). A circular plate (14) is rotatably connected to the other end of the fixed shaft (15). The circular plate (14)... A telescopic component is fixedly connected to one side, and a rolling block (23) is fixedly connected to the output end of the telescopic component. The rolling block (23) is engaged inside the first locking groove (702). The specifications of the first locking groove (702) are the same as those of the second locking groove (705). A swing groove (12) is provided on one side of the extension block (10) to facilitate the swing of the rolling block (23) along the axis of the rotating shaft (13). A limiting component is provided on one side of the extension block (10) to limit the swing position of the rolling block (23).

5. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 4, characterized in that, The limiting component includes a fixed post (17) fixedly connected to the outer wall of one side of the extension block (10). An elastic sheet (18) is fixedly connected to the outer circumference of the fixed post (17). The cross-section of the elastic sheet (18) is L-shaped. A V-shaped groove (19) is opened on the outer circumference of the second circular block in the swing rod (16). A stop bar (20) for blocking and limiting the elastic sheet (18) is fixedly connected to the inner wall of one side of the V-shaped groove (19). One end of the elastic sheet (18) abuts against the outer wall of one side of the stop bar (20).

6. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 5, characterized in that, The second circular block in the swing arm (16) has a groove (21) on its outer circumference for locking and limiting the elastic sheet (18) after the rolling block (23) swings. The groove (21) has a U-shaped cross-section.

7. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 6, characterized in that, The telescopic assembly includes a connecting cylinder (11) fixedly connected to the outer wall of one side of the circular plate (14), a sliding plate (25) slidably connected to the inner wall of one side of the connecting cylinder (11), a spring (26) fixedly connected to the outer wall of one side of the sliding plate (25), the other end of the spring (26) fixedly connected to the inner wall of one side of the connecting cylinder (11), and a sliding column (24) fixedly connected to the outer wall of the sliding plate (25) away from the spring (26), the other end of the sliding column (24) fixedly connected to the outer wall of one end of the rolling block (23).

8. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 7, characterized in that, The outer circumferential wall of the slide column (24) is fixedly connected with a key rod to prevent the slide column (24) from rotating, and one end of the connecting cylinder (11) is provided with a key groove that cooperates with the key rod.

9. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 8, characterized in that, A ramp block (708) is fixedly connected to one side inner wall of the rear section (707). The thickness of the ramp block (708) gradually increases in the direction away from the second locking groove (705) until it is flush with the side wall surface of the positioning plate (1).

10. The integrated distal tibial osteotomy positioning and fixation guide system according to claim 9, characterized in that, The top outer wall of the distal bone segment (101) is provided with a second locking bolt hole (27), which is V-shaped on the outer wall of the distal bone segment (101). The top outer wall of the proximal bone segment (102) is provided with a first locking bolt hole (9), which is arc-shaped on the outer wall of the proximal bone segment (102). The positioning plate (1) has multiple second anti-slip grooves (22) on the side away from the guide sliding plate (2), and the cross-section of the second anti-slip groove (22) is wavy.

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