Proximal tibia anatomical bone defect cushion block prosthesis

Abstract

The invention relates to the technical field of implantation orthopedics, in particular to a proximal tibia anatomical bone defect cushion block prosthesis which comprises a cushion block prosthesis structure and a lateral steel plate, and the cushion block prosthesis structure comprises an anatomical bone defect cushion block and a cage structure fixedly arranged at the bottom end of the anatomical bone defect cushion block. The lateral steel plate is arranged on the side face of the anatomical bone defect cushion block. By arranging a cushion block prosthesis structure and a lateral steel plate, an anatomical bone defect cushion block and an anatomical prosthesis with cage structures on the two sides are customized according to the condition of internal bone defects on the basis of minimum osteotomy of proximal tibia bone defects, a normal bone articular surface can be reserved, the osteotomy amount is reduced, meanwhile, normal patellar ligaments and tibial collateral ligaments are reserved, and the osteotomy effect is improved. The joint function is maintained to the maximum extent, the cushion block prosthesis structure and the lateral steel plates can provide initial stability and provide a structural foundation for long-term stability, and the hollow cage structures on the two sides can be used for bone grafting, have a bone guiding function and can promote formation of new bones.

Description

Technical Field

[0001] The present application relates to the field of implant orthopedic technology, and in particular to a proximal tibial anatomical bone defect spacer prosthesis. Background Art

[0002] Bone defects in the knee joint can be caused by many reasons, including joint deformity, condylar dysplasia, avascular necrosis, trauma, high tibial osteotomy and knee revision surgery. In existing knee replacement surgeries, the treatment methods for bone defects are generally filling with bone cement, bone grafting and the use of customized prostheses. The above methods have different disadvantages. Bone cement filling is not suitable for patients with severe bone defects because of its poor mechanical properties; bone grafting is divided into autologous bone and allogeneic bone, and the source of autologous bone is limited, while the safety of allogeneic bone and other uncertainties can easily lead to bone graft failure; customized prostheses are often targeted at patients with severe bone defects, and the amount of bone resection is often large, resulting in limited joint mobility.

[0003] Therefore, the prior art has the following defects: 1. The amount of osteotomy for the existing bone defect is large; 2. The sharp edges of the existing bone defect pad can easily cause soft tissue pain; 3. Most existing bone defect pads are trabecular structures with low overall strength; 4. Currently, most spacer prostheses lack biological fixation structures and have poor bone ingrowth effects.

[0004] To this end, the present application provides a proximal tibial anatomical bone defect spacer prosthesis. Summary of the Invention

[0005] The purpose of this application is to solve at least one technical problem raised in the background technology.

[0006] The present application provides a proximal tibial anatomical bone defect spacer prosthesis, comprising a spacer prosthesis structure and a lateral steel plate. The spacer prosthesis structure comprises an anatomical bone defect spacer and a cage structure fixed to the bottom end of the anatomical bone defect spacer, and the lateral steel plate is arranged on the side of the anatomical bone defect spacer; A first mounting hole is provided on the surface of the anatomical bone defect pad, and a first fixing screw is provided on the inner wall of the first mounting hole for fixing the anatomical bone defect pad to the bone. A second mounting hole is provided on the surface of the lateral steel plate and the anatomical bone defect pad, and a second fixing screw is provided on the inner wall of the second mounting hole for fixing the lateral steel plate to the anatomical bone defect pad. A third mounting hole is provided on the surface of the lateral steel plate, and a third fixing screw is provided on the inner wall of the third mounting hole for fixing the lateral steel plate to the bone.

[0007] By adopting the above technical solution, on the basis of minimal osteotomy for the proximal tibial bone defect, according to the situation of the internal bone defect, customized anatomical bone defect spacers and anatomical prostheses with cage structures on both sides can preserve the normal bone joint surface, reduce the amount of osteotomy, and at the same time preserve the normal patellar ligament and tibial collateral ligament, thereby maintaining joint function to the maximum extent. Moreover, the spacer prosthesis structure and lateral steel plates can provide initial stability and provide a structural basis for long-term stability. In addition, the hollow cage structures on both sides can be used for bone grafting, have a bone-guiding effect, and can promote the formation of new bone.

[0008] Preferably, the top of the anatomical bone defect spacer has a ten-degree backward tilt angle.

[0009] By adopting the above technical solution, the degree of fit between the top of the anatomical bone defect spacer and the bone is improved.

[0010] Preferably, the anatomical bone defect spacer is a T-shaped structure, and the anatomical bone defect spacer is a solid structure.

[0011] By adopting the above technical solution, the strength of the spacer prosthesis structure is ensured.

[0012] Preferably, a connecting mechanism is provided between the lateral steel plate and the anatomical bone defect pad, which is used to quickly connect the lateral steel plate and the anatomical bone defect pad. The connecting mechanism includes a rectangular slide groove provided on the surface of the anatomical bone defect pad, and a rectangular slider slidably provided on the inner wall of the rectangular slide groove. A plug-in block is fixed on the surface of the lateral steel plate, and a plug-in groove adapted to the plug-in block is provided on the surface of the rectangular slider. By adopting the above technical solution, the side steel plates can be inserted into the insertion grooves on the rectangular sliding blocks through the insertion blocks.

[0013] Two symmetrical limiting rods are fixedly provided on the inner wall of the rectangular sliding groove, and two sliding holes are opened on the surface of the rectangular sliding block and are respectively slidably connected to the outer surfaces of the two limiting rods.

[0014] By adopting the above technical solution, the rectangular slider can slide stably on the inner wall of the rectangular slide groove, thereby being able to adjust the position of the lateral steel plate after the connection.

[0015] Preferably, a pressure plate is slidably provided on the inner wall of the plug-in slot, and two symmetrical pressure blocks are fixedly provided on the outer surface of the pressure plate. The inner wall of the plug-in slot is provided with a pressure groove which is slidably connected to the outer surfaces of the two pressure blocks respectively. A telescopic airbag is fixedly provided on the inner wall of the pressure groove, and the telescopic end of the telescopic airbag is fixedly connected to the surface of the pressure block.

[0016] By adopting the above technical solution, the telescopic airbag can be automatically squeezed by the pressing block.

[0017] Preferably, a sealing cavity is provided on the inner walls on both sides of the plug-in slot, and a sealing positioning block is slidably provided on the inner wall of the sealing cavity. The surfaces of the two telescopic airbags are provided with a first inflation tube extending into the inside of the two sealing cavities respectively, and the surface of the plug-in block is provided with a positioning groove adapted to the sealing positioning block.

[0018] By adopting the above technical solution, the telescopic airbag can be squeezed by the pressure block, so that the air in the telescopic airbag enters the sealed cavity. When the sealing positioning block corresponds to the positioning groove on the plug-in block, the sealing positioning block can automatically enter the positioning groove under the action of air pressure, thereby realizing effective fixation of the plug-in block and the rectangular slider.

[0019] Preferably, a first return spring is fixedly provided on the inner bottom wall of the telescopic airbag, and the other end of the first return spring is fixedly connected to the inner top wall of the telescopic airbag, and a second return spring is fixedly provided on the sealing cavity, and one end of the second return spring away from the inner wall of the sealing cavity is fixedly connected to the surface of the sealing positioning block.

[0020] By adopting the above technical solution, the movement of the sealing positioning block on the inner wall of the sealing cavity can be facilitated.

[0021] Preferably, a plurality of groups of threaded countersunk holes are provided on the surface of the side steel plate, and the inner walls of the threaded countersunk holes are threadedly connected with hexagonal locking bolts.

[0022] By adopting the above technical solution, the lateral steel plate and the anatomical bone defect pad are effectively locked by screwing the hexagonal locking bolt, thereby achieving adjustment of the position of the lateral steel plate.

[0023] Preferably, the surface of the anatomical bone defect pad is provided with a sealing assembly for sealing the rectangular slide groove, and the sealing assembly includes a rectangular inflatable airbag fixed on the bottom wall of the plug-in groove, the top end of the rectangular inflatable airbag is fixedly connected to the lower surface of the pressure plate, and the inner top wall and inner bottom wall of the rectangular inflatable airbag are fixed with a third reset spring.

[0024] By adopting the above technical solution, the pressing plate can automatically squeeze the rectangular inflatable airbag during the process of inserting the plug-in block into the plug-in slot.

[0025] Preferably, the sealing assembly also includes an annular groove opened on the surface of the anatomical bone defect pad and corresponding to the rectangular slide groove, the inner wall of the annular groove is fixedly provided with an annular expansion airbag, and the surface of the rectangular inflatable airbag is provided with a second inflation tube extending to the interior of the annular expansion airbag.

[0026] By adopting the above technical solution, when the rectangular inflatable airbag is squeezed, the annular expansion airbag can be inflated through the second inflation tube.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The present application describes a proximal tibial anatomical bone defect spacer prosthesis, which, by setting a spacer prosthesis structure and lateral steel plates, customizes an anatomical bone defect spacer and an anatomical prosthesis with cage structures on both sides based on the minimum osteotomy of the proximal tibial bone defect and the condition of the internal bone defect. This can preserve the normal bone joint surface, reduce the amount of osteotomy, and at the same time preserve the normal patellar ligament and tibial collateral ligament, thereby maintaining joint function to the maximum extent. Moreover, the spacer prosthesis structure and lateral steel plates can provide initial stability and a structural basis for long-term stability. Furthermore, the hollow cage structures on both sides can be used for bone grafting, have a bone-guiding effect, and can promote the formation of new bone.

[0028] When the lateral plate is fixed to the support frame, the lateral plate is inserted into the slot on the rectangular slide block, and the lateral plate is pressed against the support frame, so that the pressure plate drives the pressure block to press the two telescopic air bags, so that the air in the telescopic air bags enters the sealing cavity. When the sealing positioning block corresponds to the positioning groove on the plug-in block, the sealing positioning block can automatically enter the positioning groove under the action of air pressure, thereby effectively fixing the plug-in block and the rectangular slide block, thereby realizing the rapid connection and fixation of the lateral plate and the anatomical bone defect pad. Moreover, after the lateral plate and the anatomical bone defect pad are connected and fixed, the lateral plate can be slid to drive the rectangular slide block to slide on the inner wall of the rectangular slide groove, and the lateral plate and the anatomical bone defect pad can be effectively locked by turning the hexagonal locking bolt, thereby realizing the adjustment of the position of the lateral plate.

[0029] 3. The proximal tibial anatomical bone defect pad prosthesis described in the present application is equipped with a sealing component. When the pressure plate moves downward, it can squeeze the rectangular inflatable airbag, so that the air inside the rectangular inflatable airbag enters the annular expansion airbag, causing the annular expansion airbag to expand, thereby achieving effective sealing at the connection between the lateral steel plate and the anatomical bone defect pad. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application; Figure 2 This is a schematic diagram of the structure of the spacer prosthesis according to the first embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the medium anatomical bone defect spacer and the lateral steel plate in Example 2 of the present application; Figure 4 This application Figure 3 Schematic diagram of the explosion structure; Figure 5 This application Figure 4 A schematic diagram of the second perspective structure; Figure 6 This application Figure 3 Schematic diagram of the cross-section structure; Figure 7 This application Figure 6 Enlarged structural diagram at point A in the middle.

[0031] Description of reference numerals: 100, spacer prosthesis structure; 101, anatomical bone defect spacer; 102, cage structure; 200, lateral steel plate; 300, first fixing screw; 400, second fixing screw; 500, third fixing screw; 600, connecting mechanism; 601, rectangular slide; 602, rectangular slider; 603, plug-in block; 604, plug-in slot; 605, limiting rod; 606, hexagon socket locking bolt; 607, pressure plate; 608, pressure block; 609, pressure slot; 6010, telescopic airbag; 6011, sealing chamber; 6012, sealing positioning block; 6013, positioning slot; 6014, first return spring; 6015, second return spring; 700, sealing assembly; 701, rectangular inflatable airbag; 702, third return spring; 703, annular expansion airbag. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1 To the attached Figure 7 , further details of this application are given.

[0033] Example 1 Please pay attention to Figure 1 , Figure 2 A proximal tibial anatomical bone defect spacer prosthesis includes a spacer prosthesis structure 100 and a lateral steel plate 200. The spacer prosthesis structure 100 includes an anatomical bone defect spacer 101 and a cage structure 102 fixed to the bottom end of the anatomical bone defect spacer 101. The lateral steel plate 200 is arranged on the side of the anatomical bone defect spacer 101. A first mounting hole is provided on the surface of the anatomical bone defect pad 101, and a first fixing screw 300 is provided on the inner wall of the first mounting hole for fixing the anatomical bone defect pad 101 to the bone. A second mounting hole is provided on the surface of the lateral steel plate 200 and the anatomical bone defect pad 101, and a second fixing screw 400 is provided on the inner wall of the second mounting hole for fixing the lateral steel plate 200 to the anatomical bone defect pad 101. A third mounting hole is provided on the surface of the lateral steel plate 200, and a third fixing screw 500 is provided on the inner wall of the third mounting hole for fixing the lateral steel plate 200 to the bone.

[0034] Specifically, on the basis of minimal osteotomy of the proximal tibial bone defect, according to the condition of the internal bone defect, an anatomical bone defect pad 101 and an anatomical prosthesis with cage structures 102 on both sides are customized, which can preserve the normal bone joint surface, reduce the amount of osteotomy, and at the same time preserve the normal patellar ligament and tibial collateral ligament, thereby maintaining joint function to the maximum extent. Moreover, the pad prosthesis structure 100 and the lateral steel plate 200 can provide initial stability and provide a structural basis for long-term stability. In addition, the hollow cage structures 102 on both sides can be used for bone grafting, have a bone-guiding effect, and can promote the formation of new bone.

[0035] Please refer to Figure 1 , Figure 2 The top of the anatomical bone defect spacer 101 has a ten-degree backward tilt angle.

[0036] Specifically, the degree of fit between the top of the anatomical bone defect spacer 101 and the bone is improved.

[0037] Please refer to Figure 1 , Figure 2 The anatomical bone defect spacer 101 is a T-shaped structure, and the anatomical bone defect spacer 101 is a solid structure, which is used to ensure the strength of the spacer prosthesis structure 100.

[0038] Specifically, it is used to ensure the strength of the spacer prosthesis structure 100 .

[0039] The working principle of this embodiment is as follows: The anatomical bone defect spacer 101 is fixed to the bone through the first mounting hole and the first fixing screw 300, and then bone is grafted in the cage structure 102. The lateral steel plate 200 is connected and fixed to the anatomical bone defect spacer 101 through the second fixing screw 400. Finally, the lateral steel plate 200 is fixed to the remaining bone through the third fixing screw 500 to achieve rapid implantation and installation of the prosthesis. Thus, the prosthesis can be implanted according to the internal fixation method based on the minimum osteotomy of the proximal tibial bone defect. In the case of bone defects, customized anatomical bone defect pads 101 and anatomical prostheses with cage structures 102 on both sides can preserve the normal bone joint surface, reduce the amount of osteotomy, and at the same time preserve the normal patellar ligament and tibial collateral ligament, thereby maintaining joint function to the maximum extent. Moreover, the pad prosthesis structure 100 and the lateral steel plate 200 can provide initial stability and provide a structural basis for long-term stability. In addition, the hollow cage structures 102 on both sides can be used for bone grafting, have a bone-guiding effect, and can promote the formation of new bone.

[0040] It should be noted that the inner surface of the cage structure 102 is treated with a hydroxyapatite (HA) coating with a coating thickness of 50-100 μm, a porosity of ≥60%, and a pore size of 300-500 μm to promote bone cell growth and new bone formation. A microgroove structure (depth of 50-100 μm, spacing of 200 μm) is set on the inner wall of the cage structure 102 to simulate the morphology of trabeculae and guide the directional growth of bone tissue.

[0041] Example 2 Based on the first embodiment, Figures 3 to 7 , and the difference from the first embodiment is that: Please refer to Figure 4 , Figure 5 A connecting mechanism 600 is provided between the lateral steel plate 200 and the anatomical bone defect pad 101, which is used to quickly connect the lateral steel plate 200 and the anatomical bone defect pad 101. The connecting mechanism 600 includes a rectangular chute 601 provided on the surface of the anatomical bone defect pad 101, and a rectangular slider 602 slidably provided on the inner wall of the rectangular chute 601. A plug-in block 603 is fixed on the surface of the lateral steel plate 200, and a plug-in groove 604 adapted to the plug-in block 603 is provided on the surface of the rectangular slider 602. Specifically, the side steel plate 200 can be inserted into the insertion groove 604 on the rectangular sliding block 602 through the insertion block 603.

[0042] Two symmetrical limiting rods 605 are fixedly provided on the inner wall of the rectangular sliding groove 601 , and two sliding holes are opened on the surface of the rectangular sliding block 602 , which are respectively slidably connected to the outer surfaces of the two limiting rods 605 .

[0043] Specifically, the rectangular slider 602 can slide stably on the inner wall of the rectangular slide groove 601, thereby adjusting the position of the rear side steel plate 200 connected thereto.

[0044] Please refer to Figure 6 , Figure 7 A pressure plate 607 is slidingly provided on the inner wall of the plug-in slot 604, and two symmetrical pressure blocks 608 are fixedly provided on the outer surface of the pressure plate 607. The inner wall of the plug-in slot 604 is provided with a pressure groove 609 which is slidingly connected to the outer surfaces of the two pressure blocks 608 respectively. A telescopic airbag 6010 is fixedly provided on the inner wall of the pressure groove 609, and the telescopic end of the telescopic airbag 6010 is fixedly connected to the surface of the pressure block 608.

[0045] Specifically, the automatic squeezing of the telescopic airbag 6010 can be achieved by the pressing block 608 .

[0046] Please refer to Figure 6 , Figure 7, sealing cavities 6011 are provided on the inner walls on both sides of the plug-in slot 604, and sealing positioning blocks 6012 are slidingly provided on the inner walls of the sealing cavities 6011. The surfaces of the two telescopic airbags 6010 are provided with first inflation tubes extending to the inside of the two sealing cavities 6011 respectively, and the surface of the plug-in block 603 is provided with a positioning groove 6013 adapted to the sealing positioning block 6012.

[0047] Specifically, the telescopic airbag 6010 can be squeezed by the pressing block 608, so that the air in the telescopic airbag 6010 enters the sealing cavity 6011. When the sealing positioning block 6012 corresponds to the positioning groove 6013 on the plug-in block 603, the sealing positioning block 6012 can automatically enter the positioning groove 6013 under the action of air pressure, thereby effectively fixing the plug-in block 603 and the rectangular slider 602.

[0048] Please refer to Figure 6 , Figure 7 A first return spring 6014 is fixedly provided on the inner bottom wall of the telescopic airbag 6010, and the other end of the first return spring 6014 is fixedly connected to the inner top wall of the telescopic airbag 6010. A second return spring 6015 is fixedly provided on the sealing cavity 6011, and one end of the second return spring 6015 away from the inner wall of the sealing cavity 6011 is fixedly connected to the surface of the sealing positioning block 6012.

[0049] Specifically, it can facilitate the movement of the sealing positioning block 6012 on the inner wall of the sealing cavity 6011.

[0050] Please refer to Figure 6 , Figure 7 The surface of the side steel plate 200 is provided with a plurality of threaded countersunk holes, and the inner wall of the threaded countersunk hole is threadedly connected with a hexagonal locking bolt 606. It should be noted that each group of threaded countersunk holes is four threaded countersunk holes in a rectangular array.

[0051] Specifically, the lateral steel plate 200 and the anatomical bone defect spacer 101 are effectively locked by screwing the hexagonal locking bolt 606, thereby adjusting the position of the lateral steel plate 200.

[0052] In this embodiment, by providing a connecting mechanism 600, when installing the side steel plate 200, the side steel plate 200 can be plugged into the plug-in slot 604 on the rectangular slider 602 through the plug-in block 603. When the plug-in block 603 is inserted into the plug-in slot 604, the pressure plate 607 can be squeezed, so that the pressure plate 607 drives the pressure block 608 to squeeze the two telescopic airbags 6010, so that the air in the telescopic airbags 6010 enters the sealing cavity 6011. When the sealing positioning block 6012 corresponds to the positioning slot 6013 on the plug-in block 603, the sealing positioning block 6012 is in contact with the sealing cavity 6011. It can automatically enter the positioning groove 6013 under the action of air pressure, realize the effective fixation of the plug-in block 603 and the rectangular slider 602, thereby realizing the rapid connection and fixation of the lateral steel plate 200 and the anatomical bone defect pad 101. Moreover, after the lateral steel plate 200 is connected and fixed with the anatomical bone defect pad 101, the lateral steel plate 200 can be slid to drive the rectangular slider 602 to slide on the inner wall of the rectangular slide groove 601, and the lateral steel plate 200 and the anatomical bone defect pad 101 can be effectively locked by screwing the hexagonal locking bolt 606, thereby realizing the adjustment of the position of the lateral steel plate 200.

[0053] Please refer to Figure 6 , Figure 7 The surface of the anatomical bone defect pad 101 is provided with a sealing component 700 for sealing the rectangular slide groove 601. The sealing component 700 includes a rectangular inflatable airbag 701 fixed on the inner bottom wall of the plug-in groove 604. The top of the rectangular inflatable airbag 701 is fixedly connected to the lower surface of the pressure plate 607. The inner top wall and inner bottom wall of the rectangular inflatable airbag 701 are fixed with a third reset spring 702.

[0054] Specifically, when the plug-in block 603 is inserted into the plug-in slot 604 , the pressing plate 607 can automatically squeeze the rectangular inflatable airbag 701 .

[0055] Please refer to Figure 6 , Figure 7 The sealing assembly 700 also includes an annular groove formed on the surface of the anatomical bone defect spacer 101 and corresponding to the rectangular chute 601. An annular expansion balloon 703 is fixed to the inner wall of the annular groove. A second inflation tube is provided on the surface of the rectangular expansion balloon 701, extending into the interior of the annular expansion balloon 703. In this embodiment, the annular expansion balloon 703 is made of medical-grade silicone rubber with a Shore hardness of 50-60A, a tensile strength ≥8MPa, and an elongation at break ≥500%. The balloon surface is treated with a hydrophilic agent (e.g., plasma coating) to reduce protein deposition and fiber wrapping, thereby lowering the risk of an inflammatory response. Medical-grade antioxidants (e.g., diphenylsilanediol) are added to the silicone rubber to enhance the material's aging resistance in vivo.

[0056] Specifically, when the rectangular inflatable airbag 701 is squeezed, the annular expansion airbag 703 can be inflated through the second inflation tube.

[0057] Among them, the present invention sets a sealing component 700, which can squeeze the rectangular inflatable airbag 701 when the pressure plate 607 moves downward, so that the air inside the rectangular inflatable airbag 701 enters the annular expansion airbag 703, causing the annular expansion airbag 703 to expand, thereby achieving effective sealing at the connection between the lateral steel plate 200 and the anatomical bone defect pad 101.

[0058] The working principle of this embodiment is: The anatomical bone defect pad 101 is fixed to the bone through the first mounting hole and the first fixing screw 300, and then bone grafting is performed in the cage structure 102. When the lateral steel plate 200 is installed, the lateral steel plate 200 can be inserted into the insertion groove 604 on the rectangular slider 602 through the insertion block 603. When the insertion block 603 is inserted into the insertion groove 604, the pressure plate 607 can be squeezed, so that the pressure plate 607 drives the pressure block 608 to squeeze the two telescopic airbags 6010, so that the air in the telescopic airbags 6010 enters the sealing cavity 6011. When the sealing positioning block 6012 corresponds to the positioning groove 6013 on the insertion block 603, the sealing positioning block 6012 can automatically enter the positioning groove 6013 under the action of air pressure, thereby realizing the connection between the insertion block 603 and the rectangular The effective fixation of the slider 602 enables the rapid connection and fixation of the lateral steel plate 200 and the anatomical bone defect pad 101. After the lateral steel plate 200 is connected and fixed to the anatomical bone defect pad 101, the lateral steel plate 200 can be slid to drive the rectangular slider 602 to slide on the inner wall of the rectangular slide 601, and the lateral steel plate 200 and the anatomical bone defect pad 101 can be effectively locked by screwing the hexagonal locking bolt 606, thereby achieving the adjustment of the position of the lateral steel plate 200. When the pressure plate 607 moves downward, the rectangular inflatable airbag 701 can be squeezed, so that the air inside the rectangular inflatable airbag 701 enters the annular expansion airbag 703, causing the annular expansion airbag 703 to expand, thereby achieving effective sealing of the connection between the lateral steel plate 200 and the anatomical bone defect pad 101.

[0059] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A proximal tibial anatomical bone defect spacer prosthesis, comprising a spacer prosthesis structure (100) and a lateral steel plate (200), characterized in that: The spacer prosthesis structure (100) comprises an anatomical bone defect spacer (101) and a cage structure (102) fixed to the bottom end of the anatomical bone defect spacer (101), and the lateral steel plate (200) is arranged on the side of the anatomical bone defect spacer (101); A first mounting hole is provided on the surface of the anatomical bone defect pad (101), and a first fixing screw (300) is provided on the inner wall of the first mounting hole for fixing the anatomical bone defect pad (101) to the bone. A second mounting hole is provided on the surface of the lateral steel plate (200) and the anatomical bone defect pad (101), and a second fixing screw (400) is provided on the inner wall of the second mounting hole for fixing the lateral steel plate (200) to the anatomical bone defect pad (101). A third mounting hole is provided on the surface of the lateral steel plate (200), and a third fixing screw (500) is provided on the inner wall of the third mounting hole for fixing the lateral steel plate (200) to the bone.

2. The proximal tibial anatomical bone defect spacer prosthesis according to claim 1, characterized in that: The top of the anatomical bone defect spacer (101) has a ten-degree backward tilt angle.

3. The proximal tibial anatomical bone defect spacer prosthesis according to claim 2, characterized in that: The anatomical bone defect spacer (101) is a T-shaped structure, and the anatomical bone defect spacer (101) is a solid structure, used to ensure the strength of the spacer prosthesis structure (100).

4. The proximal tibial anatomical bone defect spacer prosthesis according to claim 1, characterized in that: A connecting mechanism (600) is provided between the lateral steel plate (200) and the anatomical bone defect pad (101), which is used to quickly connect the lateral steel plate (200) and the anatomical bone defect pad (101), and the connecting mechanism (600) includes a rectangular chute (601) provided on the surface of the anatomical bone defect pad (101), and a rectangular slider (602) slidably provided on the inner wall of the rectangular chute (601), a plug-in block (603) is fixed on the surface of the lateral steel plate (200), and a plug-in groove (604) adapted to the plug-in block (603) is provided on the surface of the rectangular slider (602); Two symmetrical limiting rods (605) are fixedly provided on the inner wall of the rectangular sliding groove (601), and two sliding holes are opened on the surface of the rectangular sliding block (602) and are respectively slidably connected to the outer surfaces of the two limiting rods (605).

5. The proximal tibial anatomical bone defect spacer prosthesis according to claim 4, characterized in that: A pressure plate (607) is slidably provided on the inner wall of the plug-in slot (604), and two symmetrical pressure blocks (608) are fixedly provided on the outer surface of the pressure plate (607). A pressure groove (609) is provided on the inner wall of the plug-in slot (604) and is slidably connected to the outer surfaces of the two pressure blocks (608). A telescopic airbag (6010) is fixedly provided on the inner wall of the pressure groove (609), and the telescopic end of the telescopic airbag (6010) is fixedly connected to the surface of the pressure block (608).

6. The proximal tibial anatomical bone defect spacer prosthesis according to claim 5, characterized in that: The inner walls on both sides of the plug-in slot (604) are provided with sealed cavities (6011), and the inner walls of the sealed cavities (6011) are slidably provided with sealed positioning blocks (6012). The surfaces of the two telescopic airbags (6010) are provided with first inflation tubes extending into the interiors of the two sealed cavities (6011), respectively. The surface of the plug-in block (603) is provided with a positioning groove (6013) adapted to the sealing positioning blocks (6012).

7. The proximal tibial anatomical bone defect spacer prosthesis according to claim 6, characterized in that: A first return spring (6014) is fixedly provided on the inner bottom wall of the telescopic airbag (6010), and the other end of the first return spring (6014) is fixedly connected to the inner top wall of the telescopic airbag (6010). A second return spring (6015) is fixedly provided on the sealed cavity (6011), and one end of the second return spring (6015) away from the inner wall of the sealed cavity (6011) is fixedly connected to the surface of the sealing positioning block (6012).

8. The proximal tibial anatomical bone defect spacer prosthesis according to claim 4, characterized in that: The surface of the side steel plate (200) is provided with a plurality of groups of threaded countersunk holes, and the inner walls of the threaded countersunk holes are threadedly connected with hexagonal locking bolts (606).

9. The proximal tibial anatomical bone defect spacer prosthesis according to claim 7, characterized in that: The surface of the anatomical bone defect pad (101) is provided with a sealing component (700) for sealing the rectangular slide groove (601), and the sealing component (700) includes a rectangular inflatable airbag (701) fixedly arranged on the inner bottom wall of the plug-in groove (604), the top end of the rectangular inflatable airbag (701) is fixedly connected to the lower surface of the pressure plate (607), and the inner top wall and inner bottom wall of the rectangular inflatable airbag (701) are fixedly provided with a third return spring (702).

10. The proximal tibial anatomical bone defect spacer prosthesis according to claim 9, characterized in that: The sealing assembly (700) further includes an annular groove formed on the surface of the anatomical bone defect pad (101) and corresponding to the rectangular slide groove (601), an annular expansion airbag (703) being fixedly provided on the inner wall of the annular groove, and a second inflation tube extending to the interior of the annular expansion airbag (703) being provided on the surface of the rectangular inflation airbag (701).

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