A new assembled tibial posterior platform bone plate

Abstract

The application discloses a novel assembled tibial posterior platform bone plate, which comprises a posterior lateral bone plate, a middle bone plate and a posterior medial bone plate, the posterior lateral bone plate and the posterior medial bone plate are both in L shape, respectively conforming to the tibial posterior medial platform anatomical structure and the tibial posterior lateral platform anatomical structure, the middle bone plate is in T shape, conforming to the tibial posterior platform anatomical structure, and the end portions of the posterior lateral bone plate, the middle bone plate and the posterior medial bone plate are connected by being overlapped with each other. The device is divided into the middle bone plate, the posterior medial bone plate and the posterior lateral bone plate, 2-3 parts can be selected according to the fracture type to assemble and fix the fracture, only a micro-incision is needed in operation, and the device is convenient for doctors to operate; each part assembling area is provided with two assembling locking holes, two assembling Kirschner wire holes and one assembling common hole, so that the 2-3 part bone plates can be connected with each other, and the thickness of the assembling area bone plate is set to ensure the strength of the assembled bone plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a novel assembled tibial posterior platform bone plate. BACKGROUND

[0002] When the tibial platform is directly hit by violence or indirectly hit by violence such as falling from a high altitude or falling sideways, the platform bone will collapse or break. Tibial platform fractures include posterior lateral tibial platform fractures and posterior medial tibial platform fractures. In clinical practice, when the tibial platform fracture is more serious, the bone plate is generally used to fix the fracture end. However, the existing tibial platform fracture bone plate has many shortcomings, for example: the bone plate has no Kirschner wire hole or the Kirschner wire hole is located in a single position, the bone plate cannot be temporarily stabilized and fixed during the operation, it is not easy to preliminarily position the joint cavity, the locking screw is easily placed into the joint cavity, it is not convenient to fix and suture the joint capsule when the joint capsule is torn, the distal segment is easily tilted and not fitted to the bone surface when fixing the proximal end, which is not conducive to the temporary fixation of the distal end and the determination of the position of the bone plate, the body of the bone plate is not provided with a Kirschner wire hole, and when the fracture range is large and the comminuted fracture is large, the small bone fragments cannot be fixed; the bone plate is provided with a large number of locking holes, which easily causes stress concentration and increases the risk of secondary fracture; the bone plate has a long length, which is not suitable for minimally invasive incision, the surgical incision is large during the operation, which causes great trauma to the patient and increases the risk of muscle, soft tissue, blood vessel and nerve injury; the bone plate can only fix a single type of fracture, and other bone plates need to be combined for combined fixation when the posterior medial or posterior lateral fracture is combined; the assembled bone plate is mainly installed on the front side and the front-lateral side of the tibia, and is not suitable for complex tibial posterior platform fractures, and the fracture fixation is not firm, which easily causes fracture displacement. Therefore, there is an urgent need for a novel assembled tibial posterior platform bone plate to solve the above problems. SUMMARY

[0003] The present application aims to provide a novel assembled tibial posterior platform bone plate to solve the problems mentioned in the background. To achieve the above-mentioned purpose, the present application provides the following technical scheme: a novel assembled tibial posterior platform bone plate, comprising a posterior-lateral bone plate, an intermediate bone plate and a posterior-medial bone plate, the posterior-lateral bone plate and the posterior-medial bone plate are both L-shaped and conform to the anatomical structure of the posterior-medial tibial platform and the anatomical structure of the posterior-lateral tibial platform respectively, the intermediate bone plate is T-shaped and conforms to the anatomical structure of the posterior tibial platform, and the end portions of the posterior-lateral bone plate, the intermediate bone plate and the posterior-medial bone plate are connected to each other in a superimposed manner.

[0004] Preferably, the posterolateral bone plate includes a bone plate body, which is divided into a posterolateral bone-receiving area and a posterolateral bone-receiving plate assembly area. The posterolateral bone-receiving area has an arc-shaped structure and two posterolateral bone-receiving area locking holes. Two posterolateral bone-receiving area Kirschner wire holes are opened above the posterolateral bone-receiving area locking holes. The posterolateral bone-receiving plate assembly area has upper locking holes. The upper locking holes of the assembly area and the posterolateral bone-receiving area locking holes are arranged in a row. There are two upper locking holes of the assembly area. An upper Kirschner wire hole of the assembly area is opened above the two upper locking holes of the assembly area, and a lower assembly hole of the assembly area is opened below the lower locking hole of the assembly area. A lower Kirschner wire hole of the assembly area is opened below the lower locking hole of the assembly area.

[0005] Preferably, the intermediate bone plate includes a bone plate body I, which is divided into a bone-jointing area and an assembly area. The bone-jointing area has Kirschner wire holes, and two locking holes are located above the Kirschner wire holes. The two locking holes are distributed vertically. The assembly area has two upper locking holes distributed horizontally. An upper Kirschner wire hole is located above the two upper locking holes, and a lower assembly hole is located below the lower assembly hole. The lower Kirschner wire hole is located above the locking holes in the bone-jointing area. The structure of the assembly area corresponds to the structure of the posterolateral bone plate assembly area and can be stacked and connected.

[0006] Preferably, the posteromedial bone plate includes a bone plate body II, which is divided into a posteromedial bone-jointing area and a posteromedial bone-jointing plate assembly area. The posteromedial bone-jointing area has an arc-shaped structure and two posteromedial bone-jointing area locking holes. Two posteromedial bone-jointing area Kirschner wire holes are opened above the posteromedial bone-jointing area locking holes. The posteromedial bone-jointing plate assembly area has an assembly area upper locking hole I. The assembly area upper locking hole I and the posteromedial bone-jointing area locking holes are arranged in a row. There are two assembly area upper locking holes I. An assembly area upper Kirschner wire hole I is opened above the two assembly area upper locking holes I, and a assembly area lower assembly hole I is opened below the two assembly area lower locking holes I. The structure of the posteromedial bone-jointing plate assembly area corresponds to the structure of the posterolateral bone-jointing plate assembly area and can be stacked and connected.

[0007] Preferably, a guide groove is formed at the upper edge of the back surface of the posterolateral bone plate, and the guide groove communicates with the Kirschner wire hole in the posterolateral bone region; a guide groove I is formed at the upper edge of the back surface of the middle bone plate, and the guide groove I communicates with the upper Kirschner wire hole; a guide groove II is formed at the upper edge of the back surface of the posteromedial bone plate, and the guide groove II communicates with the Kirschner wire hole in the posteromedial bone region.

[0008] Preferably, the assembly area of ​​the intermediate bone plate has an arc-shaped structure, and the bone-jointing area adopts a beveled structure and a planar structure, wherein the beveled structure is connected to the assembly area.

[0009] Preferably, the edges of the posterolateral bone plate, the middle bone plate, and the posteromedial bone plate are smooth arc-shaped structures.

[0010] The technical effects and advantages of this invention are as follows: The width and curvature of this device are designed according to the anatomical structure of the posterior tibial plateau (including the posteromedial and posterolateral sides), making it an anatomical locking plate. It can fit tightly to the bone cortex without intraoperative shaping, reducing surgical steps and shortening operation time. The bone plate has a certain distance between adjacent locking holes and uniform thickness, resulting in strong integrity and high strength, reducing the risk of postoperative internal fixation failure. Its short overall length makes it suitable for minimally invasive surgical incisions, requiring only a small incision for plate placement, reducing surgical trauma and the risk of muscle, soft tissue, blood vessel, and nerve damage. Each part of the assembled bone plate has Kirschner wire holes and locking holes near the posterior, posteromedial, and posterolateral tibial plateaus, and away from the tibial plateau. The hole distribution is relatively uniform, suitable for simple posterior tibial plateau fractures (such as simple posterior, posteromedial, or posterolateral plateau fractures) and some complex fractures (such as posteromedial combined posterolateral plateau fractures or comminuted fractures). The posteromedial bone plate, posterior... The lateral and mid-lateral bone plate assembly areas are designed with a thin, arc-shaped profile near the posterior tibial plateau, allowing the inserted bone plate to conform to the bone surface and reduce friction damage to tendons, ligaments, and soft tissues. The curved edges of each part further reduce friction with soft tissues, minimizing postoperative discomfort and facilitating early exercise and rehabilitation. The system comprises a mid-lateral bone plate, a posteromedial bone plate, and a posterolateral bone plate. Depending on the fracture type, 2-3 parts can be selected for combined fixation, requiring only a minimally invasive incision during surgery, facilitating surgical manipulation. Appropriate screw hole design provides excellent fixation for posterior tibial plateau fractures. During surgery, the required assembly areas are simply stacked together, a simple assembly method that can be performed within a minimally invasive incision, facilitating intraoperative manipulation. Each assembly area has two locking holes, two Kirschner wire holes, and one standard hole for easy connection of 2-3 bone plate parts. The thickness of the bone plate in the assembly area ensures the strength of the assembled bone plate. Attached Figure Description

[0011] Figure 1 This is a front view of the posterolateral bone plate of the present invention;

[0012] Figure 2 This is a rear view of the posterolateral bone plate of the present invention;

[0013] Figure 3 This is a side view of the posterolateral bone plate of the present invention;

[0014] Figure 4 This is a front view of the intermediate connecting bone plate of the present invention;

[0015] Figure 5This is a back view of the intermediate connecting bone plate of the present invention;

[0016] Figure 6 This is a side view of the intermediate connecting bone plate of the present invention;

[0017] Figure 7 This is a front view of the posteromedial bone plate of the present invention;

[0018] Figure 8 This is a rear view of the posteromedial bone plate of the present invention;

[0019] Figure 9 This is a side view of the posteromedial bone plate of the present invention;

[0020] Figure 10 This is a schematic diagram of the operation of the present invention in Embodiment 1;

[0021] Figure 11 This is a schematic diagram illustrating the operation of the present invention in Embodiment 2;

[0022] Figure 12 This is a schematic diagram of the operation of the present invention in Embodiment 3. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention will be further described below with reference to specific illustrations. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, they can be fixed connections, detachable connections, integral connections, mechanical connections, or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0024] Example 1

[0025] like Figures 1-9 As shown, when both posterolateral and posteromedial fractures of the tibial plateau occur simultaneously, a novel assembled tibial posterior plateau bone plate is used for treatment, comprising posterolateral bone plate 1, intermediate bone plate 2, and posteromedial bone plate 3. The edges of posterolateral bone plate 1, intermediate bone plate 2, and posteromedial bone plate 3 are all smooth arc-shaped, which can reduce friction damage to tendons, ligaments, and soft tissues and foreign body sensation. Both posterolateral bone plate 1 and posteromedial bone plate 3 are L-shaped, conforming to the anatomical structures of the posteromedial and posterolateral tibial plateaus, respectively. The intermediate bone plate 2 is T-shaped, conforming to the anatomical structure of the tibial posterior plateau.

[0026] The posterolateral bone plate 1 includes a bone plate body 11, which is divided into a posterolateral bone-receiving area 12 and a posterolateral bone-receiving plate assembly area 13. The posterolateral bone-receiving area 12 has an arc-shaped structure with a thickness of 2-2.5 mm, and the posterolateral bone-receiving plate assembly area 13 has a thickness of 1-1.5 mm. Two posterolateral bone-receiving area locking holes 14 are provided on the posterolateral bone-receiving area 12. These locking holes 14 are arranged side-by-side to form a "raft effect" after locking screws are inserted during surgery, effectively supporting the articular surface. Two posterolateral bone-receiving area Kirschner wire holes 15 are provided above the locking holes 14. These holes allow for temporary fixation of the bone plate during surgery and for determining the position of the bone plate. The joint surface is properly positioned and the screw is determined to be inserted into the joint cavity. The posterolateral bone plate assembly area 13 has an upper locking hole 16. The upper locking hole 16 and the posterolateral bone plate locking hole 14 are arranged in a row. There are two upper locking holes 16. The upper Kirschner wire hole 17 is opened above the two upper locking holes 16, and the lower assembly hole 18 is opened below the two upper locking holes 18. The lower Kirschner wire hole 19 is opened below the lower locking hole 18. A suture groove 110 is opened at the upper edge of the back of the posterolateral bone plate 1. The suture groove 110 is connected to the Kirschner wire hole 15 of the posterolateral bone plate. The suture groove 110 facilitates the suture to suture the joint capsule when there is a tear in the joint capsule.

[0027] The intermediate bone plate 2 includes a bone plate body I 21, which is divided into a bone-jointing area 22 and an assembly area 23. The assembly area 23 has an arc-shaped structure with a thickness of 1-1.5 mm. The bone-jointing area 22 adopts a beveled structure and a planar structure. The beveled structure is connected to the assembly area 23, which facilitates the insertion of the bone plate without shaping, reducing surgical operations and time. The bone-jointing area 22 has Kirschner wire holes 24, which are used for temporary fixation during the operation to facilitate adjustment of the position of the bone plate. Above the Kirschner wire holes 24, there are two vertically distributed locking holes 25, which can be used for micro-adjustment of the fracture ends and application of pressure during the operation. The fracture ends are fixed to achieve anatomical reduction and buttress effect. The assembly area 23 has two upper locking holes 26 distributed on the left and right. An upper Kirschner wire hole 27 is opened above the two upper locking holes 26, and a lower assembly hole 28 is opened below the lower assembly hole 28. A lower Kirschner wire hole 29 is opened below the lower assembly hole 28. The lower Kirschner wire hole 29 is located above the locking hole 25 of the bone setting area. The structure of the assembly area 23 corresponds to the structure of the posterolateral bone plate assembly area 13. The two can be superimposed and connected. A suture groove I 210 is opened at the upper edge of the back of the assembly area 23. The suture groove I 210 communicates with the upper Kirschner wire hole 27. The suture groove I 210 facilitates the suture to suture the joint capsule when there is a tear in the joint capsule.

[0028] The posteromedial bone plate 3 includes a bone plate body II 31, which is divided into a posteromedial bone-jointing area 32 and a posteromedial bone-jointing plate assembly area 33. The posteromedial bone-jointing area 32 has an arc-shaped structure with a thickness of 2-2.5 mm, and the posteromedial bone-jointing plate assembly area 33 has a thickness of 1-1.5 mm. Two posteromedial bone-jointing area locking holes 34 are provided on the posteromedial bone-jointing area 32. These locking holes 34 are arranged side-by-side to form a "raft effect" after the locking screw is inserted during surgery, effectively supporting the articular surface. Two Kirschner wire holes 35 are provided above the posteromedial bone-jointing area locking holes 34. These holes allow for temporary fixation of the bone plate during surgery, assessment of the bone plate's position, positioning of the articular surface, and determination of whether the screw has entered the joint cavity. The bone plate assembly area 33 has an upper locking hole I36, which is arranged in a row with the locking holes 34 in the posteromedial bone joint area. There are two upper locking holes I36. Above the two upper locking holes I36, there is an upper Kirschner wire hole I37, and below it, there is a lower assembly hole I38. Below the lower locking hole I38, there is a lower Kirschner wire hole I39. The structure of the posteromedial bone plate assembly area 33 corresponds to the structure of the posterolateral bone plate assembly area 23, and the two can be superimposed and connected. A suture groove II310 is opened at the upper edge of the back of the posteromedial bone plate 3. The suture groove II310 communicates with the Kirschner wire hole 35 in the posteromedial bone joint area. The suture groove II310 facilitates the insertion of sutures to suture the joint capsule when there is a tear in the joint capsule.

[0029] Specific fixing methods are as follows: Figure 10As shown, the joint capsule was opened to expose the fracture ends. The fracture fragments were manually reduced first. A No. 1 Kirschner wire was inserted into the upper Kirschner wire hole 27 to temporarily fix the mid-joint plate 2 and determine the articular surface. A No. 2 Kirschner wire was inserted into the Kirschner wire hole 24 in the bone-setting area. The Kirschner wire hole 24 in the bone-setting area is used for temporary fixation and can also be used to fine-tune the distal end of the mid-joint plate 2. The position of the mid-joint plate 2 was determined to be in the middle of the tibia. The position was confirmed to be correct by fluoroscopy. The posterolateral bone plate assembly area 13 of the posterolateral bone plate 1 was placed into the incision corresponding to the assembly area 23 of the mid-joint plate 2. A No. 1 Kirschner wire was inserted into the upper Kirschner wire hole 17 of the assembly area. After adjusting the position, a Kirschner wire was inserted into the posterolateral bone-setting area 15 on the lateral side. A No. 3 Kirschner wire was used to initially fix the posterolateral bone plate 1, and its position was confirmed to be correct under fluoroscopy. The posteromedial bone plate 3's assembly area 33 was then placed into the incision, corresponding to the assembly area 23 of the mid-section bone plate 2. A No. 1 Kirschner wire was inserted into the upper Kirschner wire hole I 37 in the assembly area. After adjusting its position, a No. 4 Kirschner wire was inserted into the Kirschner wire hole 35 in the posteromedial bone plate 3 on the lateral side, initially fixing the posteromedial bone plate 3. Its position was confirmed to be correct under fluoroscopy. A No. 5 Kirschner wire was inserted into the overlapping holes of the lower Kirschner wire holes 19, 29, and I 39 in the assembly area to reconfirm the correct positions of the other holes in the assembly area and to assist in the locking hole 25 in the upper bone plate 3. Further anatomical reduction of the fracture ends was performed, and cortical bone screws were placed in the upper locking hole 25 of the bone-setting area to further compress and fix the position of the bone plate, ensuring the bone plate fits the bone. Simultaneously, the fracture ends were fine-tuned to facilitate better anatomical reduction. Cortical bone screws were placed in the overlapping holes of the corresponding lower assembly holes 18, 28, and I38 of the assembly area (cancellous bone screws were used except in patients with severe comminuted fractures or severe osteoporosis) to initially fix the three bone plate parts near the posterior tibial plateau. The correct positions of each hole in the assembly area were confirmed, and the posterolateral bone plate 1, the mid-intermediate bone plate 2, and the posteromedial bone plate 3 were stably connected together, with further fine-tuning performed. After anatomically reducing the fracture ends, locking screws are inserted into the overlapping holes of locking holes 16, 26, and 36 in the assembly area to stabilize and lock the fracture. Then, locking screws are inserted into the remaining locking holes 14, 25, and 34 in the posterolateral and posteromedial bone areas to stabilize and lock the fracture. This completes the initial anatomical reduction of the entire posterolateral plateau fracture. The cortical bone screw in the upper locking hole 25 is replaced with a locking screw. All Kirschner wires are removed. Fluoroscopy is used to confirm the positions of the three bone plates (posterolateral plate 1, mid-section plate 2, and posteromedial plate 3), the positions of each screw, and the anatomical reduction of the fracture. The operation is then complete.

[0030] Example 2

[0031] like Figures 4-9As shown, when a posteromedial tibial plateau fracture occurs, a novel assembled posteromedial tibial plateau bone plate is used for treatment, consisting of an intermediate connecting plate 2 and a posteromedial connecting plate 3. The edges of both the intermediate connecting plate 2 and the posteromedial connecting plate 3 are smooth arc-shaped structures, which can reduce friction damage to tendons, ligaments, and soft tissues and foreign body sensation. The posteromedial connecting plate 3 is L-shaped, which conforms to the anatomical structure of the posteromedial tibial plateau and the posterolateral tibial plateau, respectively. The intermediate connecting plate 2 is T-shaped, which conforms to the anatomical structure of the posteromedial tibial plateau.

[0032] The intermediate bone plate 2 includes a bone plate body I 21, which is divided into a bone-jointing area 22 and an assembly area 23. The assembly area 23 has an arc-shaped structure with a thickness of 1-1.5 mm. The bone-jointing area 22 adopts a beveled structure and a planar structure. The beveled structure is connected to the assembly area 23, which facilitates the insertion of the bone plate without shaping, reducing surgical operations and time. The bone-jointing area 22 has Kirschner wire holes 24, which are used for temporary fixation during the operation to facilitate adjustment of the position of the bone plate. Above the Kirschner wire holes 24, there are two vertically distributed locking holes 25, which can be used for micro-adjustment of the fracture ends and application of pressure during the operation. The fracture ends are fixed to achieve anatomical reduction and buttress effect. The assembly area 23 has two upper locking holes 26 distributed on the left and right. An upper Kirschner wire hole 27 is opened above the two upper locking holes 26, and a lower assembly hole 28 is opened below the lower assembly hole 28. A lower Kirschner wire hole 29 is opened below the lower assembly hole 28. The lower Kirschner wire hole 29 is located above the locking hole 25 of the bone setting area. The structure of the assembly area 23 corresponds to the structure of the posterolateral bone plate assembly area 13. The two can be superimposed and connected. A suture groove I 210 is opened at the upper edge of the back of the assembly area 23. The suture groove I 210 communicates with the upper Kirschner wire hole 27. The suture groove I 210 facilitates the suture to suture the joint capsule when there is a tear in the joint capsule.

[0033] The posteromedial bone plate 3 includes a bone plate body II 31, which is divided into a posteromedial bone-jointing area 32 and a posteromedial bone-jointing plate assembly area 33. The posteromedial bone-jointing area 32 has an arc-shaped structure with a thickness of 2-2.5 mm, and the posteromedial bone-jointing plate assembly area 33 has a thickness of 1-1.5 mm. Two posteromedial bone-jointing area locking holes 34 are provided on the posteromedial bone-jointing area 32. These locking holes 34 are arranged side-by-side to form a "raft effect" after the locking screw is inserted during surgery, effectively supporting the articular surface. Two Kirschner wire holes 35 are provided above the posteromedial bone-jointing area locking holes 34. These holes allow for temporary fixation of the bone plate during surgery, assessment of the bone plate's position, positioning of the articular surface, and determination of whether the screw has entered the joint cavity. The bone plate assembly area 33 has an upper locking hole I36, which is arranged in a row with the locking holes 34 in the posteromedial bone joint area. There are two upper locking holes I36. Above the two upper locking holes I36, there is an upper Kirschner wire hole I37, and below it, there is a lower assembly hole I38. Below the lower locking hole I38, there is a lower Kirschner wire hole I39. The structure of the posteromedial bone plate assembly area 33 corresponds to the structure of the posterolateral bone plate assembly area 23, and the two can be superimposed and connected. A suture groove II310 is opened at the upper edge of the back of the posteromedial bone plate 3. The suture groove II310 communicates with the Kirschner wire hole 35 in the posteromedial bone joint area. The suture groove II310 facilitates the insertion of sutures to suture the joint capsule when there is a tear in the joint capsule.

[0034] Specific fixing methods are as follows: Figure 11As shown, the joint capsule was opened to expose the fracture ends. The fracture fragments were first manually reduced. During the operation, the mid-section bone plate 2 was first inserted. A No. 1 Kirschner wire was inserted into the upper Kirschner wire hole 27 to temporarily fix the mid-section bone plate 2 and determine the articular surface. A No. 2 Kirschner wire was inserted into the Kirschner wire hole 24 in the bone-setting area for temporary fixation. At the same time, the distal end of the mid-section bone plate 2 was slightly adjusted to ensure that the position of the mid-section bone plate 2 was in the middle of the tibia. The posteromedial bone plate 3 was assembled into the incision. The Kirschner wire hole 35 in the posteromedial bone-setting area on the lateral side and the upper Kirschner wire hole 27 were overlapped and fixed with a No. 1 Kirschner wire. A No. 3 Kirschner wire was inserted into the lower Kirschner wire hole 29 and the lower Kirschner wire hole I 39 in the assembly area to initially fix the assembly area. After further reducing the fracture fragments, a No. 4 Kirschner wire was inserted into the Kirschner wire hole 35 in the posteromedial bone-setting area on the lateral side to initially connect the posteromedial bone plate 3 and the upper Kirschner wire hole 27. The tibias are brought together, and cortical bone screws are inserted into the overlapping holes of the lower assembly hole 28 and the lower assembly hole I 38 in the assembly area (cancellous bone screws are used except for patients with severe comminuted fractures and severe osteoporosis). Cortical bone screws are then inserted into the upper bone-setting locking hole 25 to further compress and fix the position of the bone plate, making the bone plate fit with the bone. At the same time, the fracture ends are finely adjusted to facilitate better anatomical reduction. Locking screws are then inserted into the overlapping holes of the corresponding upper locking hole 26 and the upper locking hole I 36 in the assembly area for stabilization. Locking screws are then inserted into the remaining bone-setting locking holes 25 and the posteromedial bone-setting locking hole 34 for stabilization, thus completing the anatomical reduction of the fracture. The cortical bone screw in the upper bone-setting locking hole 25 is replaced with a locking screw. Finally, the Kirschner wires are removed, and the operation is completed.

[0035] Example 3

[0036] like Figures 1-6 As shown, when a posterolateral tibial plateau fracture occurs, a novel assembled posterolateral tibial plateau bone plate is used for treatment, consisting of a posterolateral bone plate 1 and a midline bone plate 2. Both the posterolateral bone plate 1 and the midline bone plate 2 have smooth arc-shaped edges, which can reduce friction damage to tendons, ligaments, and soft tissues, as well as foreign body sensation. The posterolateral bone plate 1 is L-shaped, conforming to the anatomical structures of the posteromedial and posterolateral tibial plateaus, respectively. The midline bone plate 2 is T-shaped, conforming to the anatomical structure of the posterolateral tibial plateau.

[0037] The posterolateral bone plate 1 includes a bone plate body 11, which is divided into a posterolateral bone-receiving area 12 and a posterolateral bone-receiving plate assembly area 13. The posterolateral bone-receiving area 12 has an arc-shaped structure with a thickness of 2-2.5 mm, and the posterolateral bone-receiving plate assembly area 13 has a thickness of 1-1.5 mm. Two posterolateral bone-receiving area locking holes 14 are provided on the posterolateral bone-receiving area 12. These locking holes 14 are arranged side-by-side to form a "raft effect" after locking screws are inserted during surgery, effectively supporting the articular surface. Two posterolateral bone-receiving area Kirschner wire holes 15 are provided above the locking holes 14. These holes allow for temporary fixation of the bone plate during surgery and for determining the position of the bone plate. The joint surface is properly positioned and the screw is determined to be inserted into the joint cavity. The posterolateral bone plate assembly area 13 has an upper locking hole 16. The upper locking hole 16 and the posterolateral bone plate locking hole 14 are arranged in a row. There are two upper locking holes 16. The upper Kirschner wire hole 17 is opened above the two upper locking holes 16, and the lower assembly hole 18 is opened below the two upper locking holes 18. The lower Kirschner wire hole 19 is opened below the lower locking hole 18. A suture groove 110 is opened at the upper edge of the back of the posterolateral bone plate 1. The suture groove 110 is connected to the Kirschner wire hole 15 of the posterolateral bone plate. The suture groove 110 facilitates the suture to suture the joint capsule when there is a tear in the joint capsule.

[0038] The intermediate bone plate 2 includes a bone plate body I 21, which is divided into a bone-jointing area 22 and an assembly area 23. The assembly area 23 has an arc-shaped structure with a thickness of 1-1.5 mm. The bone-jointing area 22 adopts a beveled structure and a planar structure. The beveled structure is connected to the assembly area 23, which facilitates the insertion of the bone plate without shaping, reducing surgical operations and time. The bone-jointing area 22 has Kirschner wire holes 24, which are used for temporary fixation during the operation to facilitate adjustment of the position of the bone plate. Above the Kirschner wire holes 24, there are two vertically distributed locking holes 25, which can be used for micro-adjustment of the fracture ends and application of pressure during the operation. The fracture ends are fixed to achieve anatomical reduction and buttress effect. The assembly area 23 has two upper locking holes 26 distributed on the left and right. An upper Kirschner wire hole 27 is opened above the two upper locking holes 26, and a lower assembly hole 28 is opened below the lower assembly hole 28. A lower Kirschner wire hole 29 is opened below the lower assembly hole 28. The lower Kirschner wire hole 29 is located above the locking hole 25 in the bone setting area. The structure of the assembly area 23 corresponds to the structure of the posterolateral bone plate assembly area 13. The two can be superimposed and connected. A suture groove I 210 is opened at the upper edge of the back of the assembly area 23. The suture groove I 210 communicates with the upper Kirschner wire hole 27. The suture groove I 210 facilitates the suture to suture the joint capsule when there is a tear in the joint capsule.

[0039] Specific fixing methods are as follows: Figure 12As shown, the joint capsule was opened to expose the fracture ends. The fracture fragments were first manually reduced. During the operation, the mid-section bone plate 2 was first inserted. A No. 1 Kirschner wire was inserted into the upper Kirschner wire hole 27 to temporarily fix the mid-section bone plate 2 and determine the articular surface. A No. 2 Kirschner wire was inserted into the Kirschner wire hole 24 in the bone-setting area for temporary fixation. At the same time, the distal end of the mid-section bone plate 2 was finely adjusted to ensure that the position of the mid-section bone plate 2 was in the middle of the tibia. The posterolateral bone plate 1 was assembled into the incision. The upper Kirschner wire holes 17 and 27 in the assembly area were overlapped and fixed with a No. 1 Kirschner wire. A No. 3 Kirschner wire was inserted into the lower Kirschner wire hole 29 and the lower Kirschner wire hole 19 in the assembly area to initially fix the assembly area. After further reduction of the fracture fragments, a Kirschner wire was inserted into the posterolateral bone-setting area in the lateral Kirschner wire hole 15. A No. 4 Kirschner wire was inserted to initially align the bone plate and tibia together. Cortical bone screws were inserted into the overlapping holes of the lower assembly holes 18 and 28 in the assembly area (cancellous bone screws were used except for patients with severe comminuted fractures or severe osteoporosis). A cortical bone screw was inserted into the upper bone-aligning locking hole 25 to further compress and fix the position of the bone plate, ensuring that the bone plate aligns with the bone. At the same time, the fracture ends were finely adjusted to facilitate better anatomical reduction. Locking screws were inserted into the remaining bone-aligning locking holes 25 and the posterolateral bone-aligning locking hole 14 to stabilize and lock the fracture, thus completing the anatomical reduction of the fracture. The cortical bone screw in the upper bone-aligning locking hole 25 was replaced with a locking screw. Finally, the Kirschner wires were removed, and the operation was completed.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 assembled tibial posterior plateau bone plate, comprising a posterolateral bone plate, a mid-lateral bone plate, and a posteromedial bone plate, characterized in that: The posterolateral and posteromedial bone plates are both L-shaped, conforming to the anatomical structures of the posterolateral and posteromedial tibial plateaus, respectively. The intermediate bone plate is T-shaped, conforming to the anatomical structure of the posterolateral tibial plateau. The ends of the posterolateral, intermediate, and posteromedial bone plates are overlapped and connected. The posterolateral bone plate includes a bone plate body, which is divided into a posterolateral bone-receiving area and a posterolateral bone-receiving plate assembly area. The posterolateral bone-receiving area has an arc-shaped structure and two locking holes. Above the locking holes are two Kirschner wire holes. The posterolateral bone-receiving plate assembly area has two locking holes arranged in a row with the locking holes in the posterolateral bone-receiving area. Above the locking holes of the assembly area, there is an upper Kirschner wire hole for the assembly area, and below it, there is a lower assembly hole for the assembly area. Below the lower assembly hole for the assembly area, there is a lower Kirschner wire hole for the assembly area. The intermediate bone plate includes a bone plate body I, which is divided into a bone-setting area and an assembly area. The bone-setting area has Kirschner wire holes, and two locking holes are located above the Kirschner wire holes. The two locking holes are distributed vertically. The assembly area has two upper locking holes distributed horizontally. An upper Kirschner wire hole is located above the two upper locking holes, and a lower assembly hole is located below the lower assembly hole. The lower Kirschner wire hole is located above the locking holes in the bone-setting area. The structure of the assembly area corresponds to the structure of the posterolateral bone plate assembly area and can be stacked and connected. The posteromedial bone plate includes a bone plate body II, which is divided into a posteromedial bone-jointing area and a posteromedial bone plate assembly area. The posteromedial bone-jointing area has an arc-shaped structure and two posteromedial bone-jointing area locking holes. Above the posteromedial bone-jointing area locking holes, two posteromedial bone-jointing area Kirschner wire holes are opened. The posteromedial bone plate assembly area has an assembly area upper locking hole I. The assembly area upper locking hole I and the posteromedial bone-jointing area locking holes are arranged in a row. There are two assembly area upper locking holes I. Above the two assembly area upper locking holes I, there is an assembly area upper Kirschner wire hole I, and below it, there is an assembly area lower assembly hole I. Below the assembly area lower assembly hole I, there is an assembly area lower Kirschner wire hole I. The structure of the posteromedial bone plate assembly area corresponds to the structure of the posterolateral bone plate assembly area and can be stacked and connected. The edges of the posterolateral bone plate, the middle bone plate, and the posteromedial bone plate are smooth arc-shaped structures.

2. The assembled posterior tibial plateau bone plate according to claim 1, characterized in that: A guide groove is provided at the upper edge of the back of the posterolateral bone plate, and the guide groove communicates with the Kirschner wire hole in the posterolateral bone region. A guide groove I is provided at the upper edge of the back of the middle bone plate, and the guide groove I communicates with the upper Kirschner wire hole. A guide groove II is provided at the upper edge of the back of the posteromedial bone plate, and the guide groove II communicates with the Kirschner wire hole in the posteromedial bone region.

3. The assembled posterior tibial plateau bone plate according to claim 1, characterized in that: The assembly area of ​​the intermediate bone plate has an arc-shaped structure, and the bone-jointing area adopts a sloping structure and a planar structure. The sloping structure is connected to the assembly area.

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