Proximal tibia anatomical bone defect spacer prosthesis

Abstract

The application relates to the technical field of implanting bone surgery, in particular to a proximal tibia anatomical bone defect pad block prosthesis which comprises a pad block prosthesis structure and a side plate, the pad block prosthesis structure comprises an anatomical bone defect pad block and a sleeve cage structure fixed at the bottom end of the anatomical bone defect pad block, and the side plate is arranged on the side of the anatomical bone defect pad block. Through the arrangement of the pad block prosthesis structure and the side plate, on the basis of minimal osteotomy of proximal tibia bone defect, the anatomical bone defect pad block and the anatomical prosthesis with sleeve cage structures on two sides are customized according to the internal bone defect condition, the normal bone joint surface can be reserved, the amount of osteotomy is reduced, the normal patellar ligament and tibial collateral ligament are reserved, the joint function is maximally maintained, the pad block prosthesis structure and the side plate can provide initial stability and provide a structural basis for long-term stability, and the hollow sleeve cage structures on the two sides can be implanted with bone, have a bone guiding effect and can promote the formation of new bone.

Description

Technical Field

[0001] This application relates to the field of implantable orthopedic technology, and in particular to a prosthesis for a proximal tibial anatomical bone defect pad. Background Technology

[0002] Knee bone defects can be caused by a variety of factors, including joint deformities, condylar dysplasia, avascular necrosis, trauma, high tibial osteotomy, and knee revision surgery. Current knee replacement surgery generally treats bone defects by filling with bone cement, bone grafting, or using custom-made prostheses. Each method has its own drawbacks. Bone cement filling is unsuitable for patients with severe bone defects due to the poor mechanical properties of bone cement. Bone grafting can be done with autologous or allograft bone; autologous bone harvesting is limited, while allograft bone is prone to failure due to safety concerns and other uncertainties. Custom-made prostheses are often used for patients with severe bone defects, often involving significant bone removal, which can restrict joint mobility.

[0003] Therefore, the existing technology has the following drawbacks:

[0004] 1. The amount of bone resection required for the existing bone defect is relatively large;

[0005] 2. The sharp edges of the existing bone defect pads can easily cause soft tissue pain;

[0006] 3. Most existing bone defect pads are composed of trabecular bone structures, resulting in relatively low overall strength;

[0007] 4. Currently, most implant prostheses lack biological fixation structures, resulting in poor bone ingrowth.

[0008] Therefore, this application provides a prosthesis for anatomical bone defect pads in the proximal tibia. Summary of the Invention

[0009] The purpose of this application is to solve at least one technical problem raised in the background art.

[0010] This application provides a prosthesis for an anatomical bone defect pad in the proximal tibia, including a pad prosthesis structure and a lateral plate. The pad prosthesis structure includes an anatomical bone defect pad and a cage structure fixed at the bottom end of the anatomical bone defect pad. The lateral plate is disposed on the side of the anatomical bone defect pad.

[0011] The anatomical bone defect pad has a first mounting hole on its surface, and a first fixing screw for fixing the anatomical bone defect pad to the bone is provided on the inner wall of the first mounting hole. The lateral plate and the anatomical bone defect pad have a second mounting hole on their surfaces, and a second fixing screw for fixing the lateral plate to the anatomical bone defect pad is provided on the inner wall of the second mounting hole. The lateral plate has a third mounting hole on its surface, and a third fixing screw for fixing the lateral plate to the bone is provided on the inner wall of the third mounting hole.

[0012] By adopting the above technical solution, based on minimal osteotomy of proximal tibial bone defects, and according to the internal bone defect conditions, a customized anatomical bone defect pad and an anatomical prosthesis with cage structures on both sides can be used to preserve normal articular surfaces, reduce osteotomy volume, and preserve normal patellar ligament and tibial collateral ligament, thus maximizing joint function. Moreover, the pad prosthesis structure and lateral plates can provide initial stability and provide 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.

[0013] Preferably, the top of the anatomical bone defect pad has a 10-degree backward tilt angle.

[0014] By adopting the above technical solution, the fit between the top of the anatomical bone defect pad and the bone tissue was improved.

[0015] Preferably, the anatomical bone defect pad is a T-shaped structure and is a solid structure.

[0016] The above technical solution is used to ensure the strength of the pad prosthesis structure.

[0017] Preferably, a connecting mechanism is provided between the side plate and the anatomical bone defect pad, which is used to quickly connect the side plate and the anatomical bone defect pad. The connecting mechanism includes a rectangular groove formed on the surface of the anatomical bone defect pad and a rectangular slider slidably disposed on the inner wall of the rectangular groove. An insertion block is fixed on the surface of the side plate, and an insertion groove adapted to the insertion block is formed on the surface of the rectangular slider.

[0018] By adopting the above technical solution, the side steel plate can be inserted into the insertion slot on the rectangular slider through the insertion block.

[0019] The inner wall of the rectangular slide groove is fixed with two symmetrical limiting rods, and the surface of the rectangular slider is provided with two sliding holes that are slidably connected to the outer surfaces of the two limiting rods respectively.

[0020] By adopting the above technical solution, the rectangular slider can slide stably on the inner wall of the rectangular groove, thereby enabling the adjustment of the position of the steel plate on the side after connection.

[0021] Preferably, a pressure plate is slidably provided on the inner wall of the insertion slot, and two symmetrical pressure blocks are fixedly provided on the outer surface of the pressure plate. The inner wall of the insertion slot is provided with pressure grooves that are 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.

[0022] By adopting the above technical solution, the telescopic airbag can be automatically compressed using a pressure block.

[0023] Preferably, the inner walls on both sides of the insertion slot are provided with sealing cavities, and the inner walls of the sealing cavities are slidably provided with sealing positioning blocks. The surfaces of the two telescopic airbags are provided with first inflation tubes that extend into the two sealing cavities respectively. The surface of the insertion block is provided with a positioning groove that matches the sealing positioning block.

[0024] By adopting the above technical solution, the telescopic airbag can be squeezed by the pressure block, so that the air inside the telescopic airbag 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, so as to effectively fix the plug-in block and the rectangular slider.

[0025] 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. A second return spring is fixedly provided in the sealing cavity, and the 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.

[0026] By adopting the above technical solution, it is possible to facilitate the movement of the sealing positioning block within the sealing cavity.

[0027] Preferably, the surface of the side steel plate has multiple sets of threaded countersunk holes, and the inner wall of the threaded countersunk holes is threaded with an internal hexagonal locking bolt.

[0028] By adopting the above technical solution, the side plate and the anatomical bone defect pad can be effectively locked by tightening the internal hexagonal locking bolt, thereby achieving the adjustment of the position of the side plate.

[0029] Preferably, the surface of the anatomical bone defect pad is provided with a sealing assembly for sealing the rectangular groove. The sealing assembly includes a rectangular inflatable airbag fixed to the bottom wall of the insertion groove. The top of the rectangular inflatable airbag is fixedly connected to the lower surface of the pressure plate. A third return spring is fixedly provided on the inner top wall and inner bottom wall of the rectangular inflatable airbag.

[0030] By adopting the above technical solution, the pressure plate can automatically compress the rectangular inflatable airbag during the process of inserting the plug into the plug slot.

[0031] Preferably, the sealing assembly further includes an annular groove formed on the surface of the anatomical bone defect pad and corresponding to the rectangular groove, the inner wall of the annular groove being fixed with an annular inflatable air bladder, and the surface of the rectangular inflatable air bladder being provided with a second inflation tube extending into the interior of the annular inflatable air bladder.

[0032] By adopting the above technical solution, when the rectangular inflatable airbag is squeezed, the annular inflatable airbag can be inflated through the second inflation tube.

[0033] In summary, this application includes at least one of the following beneficial technical effects:

[0034] 1. The anatomical proximal tibial bone defect pad prosthesis described in this application, by setting up a pad prosthesis structure and lateral plates, based on the minimum osteotomy of the proximal tibial bone defect, customizes an anatomical bone defect pad and an anatomical prosthesis with cage structures on both sides according to the internal bone defect condition. It can preserve the normal bone articular surface, reduce the amount of osteotomy, and preserve the normal patellar ligament and tibial collateral ligament, thus maximizing the maintenance of joint function. Moreover, the pad prosthesis structure and lateral plates can provide initial stability and provide 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.

[0035] 2. The tibial proximal anatomical bone defect pad prosthesis described in this application, through the provision of a connecting mechanism, allows the lateral steel plate to be inserted into the insertion groove on the rectangular slider via an insertion block during installation. When the insertion block is inserted into the insertion groove, it compresses the pressure plate, causing the pressure plate to drive the pressure block to compress the two telescopic airbags, allowing air from the telescopic airbags to enter the sealing cavity. When the sealing positioning block aligns with the positioning groove on the insertion block, the sealing positioning block automatically enters the positioning groove under air pressure, effectively fixing the insertion block and the rectangular slider. This achieves rapid connection and fixation of the lateral steel plate and the anatomical bone defect pad. Furthermore, after the lateral steel plate and the anatomical bone defect pad are connected and fixed, the sliding lateral steel plate can drive the rectangular slider to slide along the inner wall of the rectangular groove. By tightening the hexagonal locking bolt, the lateral steel plate and the anatomical bone defect pad are effectively locked, thereby achieving adjustment of the lateral steel plate position.

[0036] 3. The tibial proximal anatomical bone defect pad prosthesis described in this application, by setting a sealing component, can compress the rectangular inflatable airbag when the pressure plate moves downward, so that the air inside the rectangular inflatable airbag enters the annular expansion airbag, causing the annular expansion airbag to expand, thereby achieving an effective seal at the connection between the side plate and the anatomical bone defect pad. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0038] Figure 2 This is a schematic diagram of the pad prosthesis structure according to Embodiment 1 of this application;

[0039] Figure 3 This is a schematic diagram of the anatomical bone defect pad and lateral steel plate structure in Embodiment 2 of this application;

[0040] Figure 4 This application Figure 3 A schematic diagram of the exploded structure;

[0041] Figure 5 This application Figure 4 A schematic diagram of the second-view structure;

[0042] Figure 6 This application Figure 3 A schematic diagram of the cross-sectional structure;

[0043] Figure 7 This application Figure 6 Enlarged structural diagram at point A in the middle.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100. Spacer prosthesis structure; 101. Anatomical bone defect spacer; 102. Cage structure; 200. Lateral plate; 300. First fixation screw; 400. Second fixation screw; 500. Third fixation screw;

[0046] 600. Connecting mechanism; 601. Rectangular slide groove; 602. Rectangular slider; 603. Insertion block; 604. Insertion groove; 605. Limiting rod; 606. Socket head cap screw; 607. Pressure plate; 608. Pressure block; 609. Pressure groove; 6010. Telescopic airbag; 6011. Sealing cavity; 6012. Sealing positioning block; 6013. Positioning groove; 6014. First return spring; 6015. Second return spring;

[0047] 700, Sealing assembly; 701, Rectangular inflatable airbag; 702, Third return spring; 703, Annular inflatable airbag. Detailed Implementation

[0048] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 This application will be described in further detail.

[0049] Example 1

[0050] Please refer to the following carefully. Figure 1, Figure 2 A prosthesis for anatomical bone defect pads in the proximal tibia includes a pad prosthesis structure 100 and a lateral steel plate 200. The pad prosthesis structure 100 includes an anatomical bone defect pad 101 and a cage structure 102 fixed at the bottom of the anatomical bone defect pad 101. The lateral steel plate 200 is disposed on the side of the anatomical bone defect pad 101.

[0051] The anatomical bone defect pad 101 has a first mounting hole on its surface. The inner wall of the first mounting hole is provided with a first fixing screw 300 for fixing the anatomical bone defect pad 101 to the bone. The lateral steel plate 200 and the anatomical bone defect pad 101 have a second mounting hole on their surfaces. The inner wall of the second mounting hole is provided with a second fixing screw 400 for fixing the lateral steel plate 200 to the anatomical bone defect pad 101. The lateral steel plate 200 has a third mounting hole on its surface. The inner wall of the third mounting hole is provided with a third fixing screw 500 for fixing the lateral steel plate 200 to the bone.

[0052] Specifically, based on the minimum osteotomy of the proximal tibial bone defect, an anatomical bone defect pad 101 and an anatomical prosthesis with cage structures 102 on both sides are customized according to the internal bone defect. This can preserve the normal articular surfaces, reduce the amount of osteotomy, and preserve the normal patellar ligament and tibial collateral ligament, thus maximizing the maintenance of joint function. Moreover, the pad prosthesis structure 100 and the lateral plate 200 can provide initial stability and provide a structural basis for long-term stability. Furthermore, the hollow cage structures 102 on both sides can be used for bone grafting, which has a bone guiding effect and can promote the formation of new bone.

[0053] Please refer to this carefully. Figure 1 , Figure 2 The top of the anatomical bone defect pad 101 has a ten-degree backward tilt angle.

[0054] Specifically, it improved the fit between the top of the anatomical bone defect pad 101 and the bone.

[0055] Please refer to this carefully. Figure 1 , Figure 2 The anatomical bone defect pad 101 has a T-shaped structure and is a solid structure, which is used to ensure the strength of the pad prosthesis structure 100.

[0056] Specifically, it is used to ensure the strength of the pad prosthesis structure 100.

[0057] The working principle of this embodiment is as follows:

[0058] The anatomical bone defect pad 101 is fixed to the bone through the first mounting hole and the first fixing screw 300. Bone grafting is then performed in the cage structure 102. Next, the lateral plate 200 is connected and fixed to the anatomical bone defect pad 101 through the second fixing screw 400. Finally, the lateral plate 200 is fixed to the remaining bone through the third fixing screw 500, achieving rapid implantation of the prosthesis. This allows the prosthesis to be installed with minimal osteotomy of the proximal tibia bone defect, based on internal... In cases of bone defects, a custom-designed anatomical bone defect pad 101 and an anatomical prosthesis with cage structures 102 on both sides can preserve normal bone articular surfaces, reduce osteotomy, and preserve normal patellar ligament and tibial collateral ligament, maximizing joint function. Moreover, the pad prosthesis structure 100 and the lateral plate 200 can provide initial stability and provide a structural basis for long-term stability. Furthermore, 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.

[0059] It should be noted that the inner surface of the cage structure 102 is treated with a hydroxyapatite (HA) coating with a thickness of 50-100 μm, a porosity of ≥60%, and a pore size of 300-500 μm to promote osteoblast ingrowth and new bone formation. Microgroove structures (depth of 50-100 μm and spacing of 200 μm) are set on the inner wall of the cage structure 102 to simulate the morphology of bone trabeculae and guide the directional growth of bone tissue.

[0060] Example 2

[0061] Based on Example 1, referring to Figures 3 to 7 And unlike Example 1, the following is true:

[0062] Please refer to this carefully. Figure 4 , Figure 5 A connecting mechanism 600 is provided between the side steel plate 200 and the anatomical bone defect pad 101. The connecting mechanism 600 is used to quickly connect the side steel plate 200 and the anatomical bone defect pad 101. The connecting mechanism 600 includes a rectangular groove 601 formed on the surface of the anatomical bone defect pad 101 and a rectangular slider 602 slidably disposed on the inner wall of the rectangular groove 601. A plug-in block 603 is fixed on the surface of the side steel plate 200, and a plug-in groove 604 adapted to the plug-in block 603 is formed on the surface of the rectangular slider 602.

[0063] Specifically, the side steel plate 200 can be inserted into the insertion slot 604 on the rectangular slider 602 via the insertion block 603.

[0064] The inner wall of the rectangular slide groove 601 is fixed with two symmetrical limiting rods 605, and the surface of the rectangular slider 602 is provided with two sliding holes that are respectively slidably connected to the outer surfaces of the two limiting rods 605.

[0065] Specifically, the rectangular slider 602 can slide stably on the inner wall of the rectangular groove 601, thereby enabling adjustment of the position of the connected rear side steel plate 200.

[0066] Please refer to this carefully. Figure 6 , Figure 7 A pressure plate 607 is slidably provided on the inner wall of the insertion groove 604, and two symmetrical pressure blocks 608 are fixedly provided on the outer surface of the pressure plate 607. A pressure groove 609 is opened on the inner wall of the insertion groove 604 and is slidably connected to the outer surface 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.

[0067] Specifically, the pressure block 608 can automatically compress the telescopic airbag 6010.

[0068] Please refer to this carefully. Figure 6 , Figure 7 The inner walls on both sides of the insertion slot 604 are provided with sealing cavities 6011, and the inner walls of the sealing cavities 6011 are slidably provided with sealing positioning blocks 6012. The surfaces of the two telescopic airbags 6010 are provided with first inflation tubes that extend into the two sealing cavities 6011 respectively. The surface of the insertion block 603 is provided with positioning grooves 6013 that are adapted to the sealing positioning blocks 6012.

[0069] Specifically, the pressure block 608 can compress the telescopic airbag 6010, thereby allowing the air inside the telescopic airbag 6010 to enter 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.

[0070] Please refer to this carefully. Figure 6 , Figure 7 The inner bottom wall of the telescopic airbag 6010 is fixedly provided with a first return spring 6014, and the other end of the first return spring 6014 is fixedly connected to the inner top wall of the telescopic airbag 6010. The sealing cavity 6011 is fixedly provided with a second return spring 6015, and the 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.

[0071] Specifically, it facilitates the movement of the sealing positioning block 6012 within the inner wall of the sealing cavity 6011.

[0072] Please refer to this carefully. Figure 6 , Figure 7The surface of the side steel plate 200 has multiple sets of threaded countersunk holes, and the inner wall of the threaded countersunk holes is threaded with hexagonal socket head cap screws 606. It should be noted that each set of threaded countersunk holes consists of four threaded countersunk holes arranged in a rectangular array.

[0073] Specifically, the side plate 200 and the anatomical bone defect pad 101 are effectively locked by turning the internal hexagon locking bolt 606, thereby adjusting the position of the side plate 200.

[0074] In this embodiment, by setting the connecting mechanism 600, when installing the side steel plate 200, the side steel plate 200 can be inserted into the insertion groove 604 on the rectangular slider 602 via the insertion block 603. When the insertion block 603 is inserted into the insertion groove 604, it can squeeze the pressure plate 607, causing the pressure plate 607 to drive the pressure block 608 to squeeze the two telescopic airbags 6010, allowing the air in the telescopic airbags 6010 to enter 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 is in operation. Under air pressure, it can automatically enter the positioning groove 6013 to effectively fix the plug block 603 and the rectangular slider 602, thereby realizing the rapid connection and fixation of the side steel plate 200 and the anatomical bone defect pad 101. Moreover, after the side steel plate 200 and the anatomical bone defect pad 101 are connected and fixed, the side steel plate 200 can slide to drive the rectangular slider 602 to slide on the inner wall of the rectangular slide groove 601, and the side steel plate 200 and the anatomical bone defect pad 101 can be effectively locked by turning the internal hexagonal locking bolt 606, thereby realizing the adjustment of the position of the side steel plate 200.

[0075] Please refer to this carefully. Figure 6 , Figure 7 The surface of the anatomical bone defect pad 101 is provided with a sealing component 700 for sealing the rectangular groove 601. The sealing component 700 includes a rectangular inflatable airbag 701 fixedly installed on the bottom wall of the insertion groove 604. The top of the rectangular inflatable airbag 701 is fixedly connected to the lower surface of the pressure plate 607. A third return spring 702 is fixedly installed on the inner top wall and inner bottom wall of the rectangular inflatable airbag 701.

[0076] Specifically, during the process of inserting the plug 603 into the plug slot 604, the pressure plate 607 can automatically compress the rectangular inflatable airbag 701.

[0077] Please refer to this carefully. Figure 6 , Figure 7The sealing assembly 700 also 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 inflatable airbag 703 is fixed to the inner wall of the annular groove, and a second inflation tube extending into the interior of the annular inflatable airbag 703 is provided on the surface of the rectangular inflatable airbag 701. In this embodiment, the annular inflatable airbag 703 is made of medical-grade silicone rubber with a Shore hardness of 50-60A, tensile strength ≥8MPa, and elongation at break ≥500%. The surface of the airbag is treated with a hydrophilic coating (such as plasma coating) to reduce protein deposition and fiber encapsulation, thereby reducing the risk of inflammatory reactions. Medical-grade antioxidants (such as diphenylsilanediol) are added to the silicone rubber to improve the material's aging resistance in vivo.

[0078] Specifically, when the rectangular inflatable airbag 701 is compressed, the annular inflatable airbag 703 can be inflated through the second inflation tube.

[0079] In this invention, by setting a sealing component 700, when the pressure plate 607 moves downward, it can compress the rectangular inflatable airbag 701, 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 an effective seal at the connection between the side steel plate 200 and the anatomical bone defect pad 101.

[0080] The working principle of this embodiment is as follows:

[0081] The anatomical bone defect pad 101 is fixed to the bone through the first mounting hole and the first fixing screw 300. Bone grafting is then performed in the cage structure 102. When installing the lateral steel plate 200, it can be inserted into the insertion groove 604 on the rectangular slider 602 via the insertion block 603. When the insertion block 603 is inserted into the insertion groove 604, it can compress the pressure plate 607, causing the pressure plate 607 to drive the pressure block 608 to compress the two telescopic airbags 6010, allowing air from the telescopic airbags 6010 to enter 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 air pressure, realizing the connection between the insertion block 603 and the rectangular slider 602. The effective fixation of the slider 602 enables the rapid connection and fixation of the side steel plate 200 and the anatomical bone defect pad 101. After the side steel plate 200 and the anatomical bone defect pad 101 are connected and fixed, the side steel plate 200 can slide to drive the rectangular slider 602 to slide on the inner wall of the rectangular groove 601. By tightening the hexagonal locking bolt 606, the side steel plate 200 and the anatomical bone defect pad 101 can be effectively locked, thereby adjusting the position of the side steel plate 200. When the pressure plate 607 moves downward, it can compress the rectangular inflatable airbag 701, allowing the air inside the rectangular inflatable airbag 701 to enter the annular expansion airbag 703, causing the annular expansion airbag 703 to expand and effectively seal the connection between the side steel plate 200 and the anatomical bone defect pad 101.

[0082] The embodiments described in this specific implementation are 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, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A prosthesis for anatomical bone defects in the proximal tibia, comprising a prosthesis structure (100) and a lateral plate (200), characterized in that, The pad prosthesis structure (100) includes an anatomical bone defect pad (101) and a cage structure (102) fixed at the bottom of the anatomical bone defect pad (101), and the side plate (200) is provided on the side of the anatomical bone defect pad (101). The anatomical bone defect pad (101) has a first mounting hole on its surface. The inner wall of the first mounting hole is provided with a first fixing screw (300) for fixing the anatomical bone defect pad (101) to the bone. The lateral steel plate (200) and the anatomical bone defect pad (101) have a second mounting hole on their surfaces. The inner wall of the second mounting hole is provided with a second fixing screw (400) for fixing the lateral steel plate (200) to the anatomical bone defect pad (101). The lateral steel plate (200) has a third mounting hole on its surface. The inner wall of the third mounting hole is provided with a third fixing screw (500) for fixing the lateral steel plate (200) to the bone. A connecting mechanism (600) is provided between the side steel plate (200) and the anatomical bone defect pad (101), which is used to quickly connect the side steel plate (200) and the anatomical bone defect pad (101). The connecting mechanism (600) includes a rectangular groove (601) formed on the surface of the anatomical bone defect pad (101) and a rectangular slider (602) slidably disposed on the inner wall of the rectangular groove (601). A plug-in block (603) is fixedly provided on the surface of the side steel plate (200), and a plug-in groove (604) adapted to the plug-in block (603) is formed on the surface of the rectangular slider (602). The inner wall of the rectangular slide groove (601) is fixed with two symmetrical limiting rods (605), and the surface of the rectangular slider (602) is provided with two sliding holes that are slidably connected to the outer surfaces of the two limiting rods (605). The inner wall of the insertion slot (604) is slidably provided with a pressure plate (607), and two symmetrical pressure blocks (608) are fixedly provided on the outer surface of the pressure plate (607). The inner wall of the insertion slot (604) is provided with pressure grooves (609) that are slidably connected to the outer surfaces of the two pressure blocks (608). The inner wall of the pressure groove (609) is fixedly provided with a telescopic airbag (6010), and the telescopic end of the telescopic airbag (6010) is fixedly connected to the surface of the pressure block (608). The inner walls of both sides of the insertion slot (604) are provided with sealing cavities (6011), and the inner walls of the sealing cavities (6011) are slidably provided with sealing positioning blocks (6012). The surfaces of the two telescopic airbags (6010) are provided with first inflation tubes that extend into the two sealing cavities (6011), and the surface of the insertion block (603) is provided with positioning grooves (6013) that are adapted to the sealing positioning blocks (6012). The inner bottom wall of the telescopic airbag (6010) is fixedly provided with a first return spring (6014), and the other end of the first return spring (6014) is fixedly connected to the inner top wall of the telescopic airbag (6010). The sealing cavity (6011) is fixedly provided with a second return spring (6015), and the 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). The surface of the side steel plate (200) has four threaded countersunk holes arranged in a rectangular array, and the inner walls of the four threaded countersunk holes are all threaded with hexagonal locking bolts (606). The surface of the anatomical bone defect pad (101) is provided with a sealing assembly (700) for sealing the rectangular groove (601). The sealing assembly (700) includes a rectangular inflatable airbag (701) fixedly disposed on the bottom wall of the insertion groove (604). The top of the rectangular inflatable airbag (701) is fixedly connected to the lower surface of the pressure plate (607). A third return spring (702) is fixedly disposed on the inner top wall and the inner bottom wall of the rectangular inflatable airbag (701). 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 groove (601), the inner wall of the annular groove being fixed with an annular inflatable air bladder (703), and the surface of the rectangular inflatable air bladder (701) being provided with a second inflation tube extending into the interior of the annular inflatable air bladder (703).

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

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

Images