Tibia malleolus medialis bone defect repair prosthesis

Abstract

The utility model discloses a tibia medial malleolus bone defect repair prosthesis, which comprises a profiling main body imitating a medial malleolus bone defect part, the profiling main body is provided with a porous structure and a ligament suture hole, the porous structure is respectively communicated with the inner side surface and the outer side surface of the profiling main body, and the porous structure is communicated with the ligament suture hole. According to the utility model, the problems of poor anti-infection ability of bone transplantation, difficulty in nursing of transplanted bone absorption and bone transportation, high requirements of bone transplantation with blood vessels on doctors and the like in the traditional medial malleolus reconstruction technology can be solved, and the technical problems of insufficient bone anatomical structure restoration, poor stress state and long restoration time of the reconstructed ankle joint can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of orthopedic implants, and particularly relates to a prosthesis for repairing tibial medial malleolus defect. Background Art

[0002] The medial malleolus is a protruding part at the lower inner end of the tibia. It is located near the ankle joint where the foot connects to the tibia and fibula of the leg. It is an important part of the tibia and ankle joint. The main function of the medial malleolus is to increase the stability of the ankle joint and limit the inversion of the foot. The medial malleolus joint surface can form an ankle hole for accommodating the talus body with the lateral malleolus joint surface and the lower end of the tibia. The matching of the talus body and the ankle hole directly affects the stability of the ankle joint and plays an important role in the balance of the joint.

[0003] At the same time, the medial malleolus is also involved in the movement of the muscles around the ankle joint. It is one of the important attachment points of the ankle inversion muscles. Through the synergistic effect with the muscles, the ankle joint can produce various flexible movements. The strength and stability of the medial malleolus also affect the function and strength of the muscles around the ankle joint.

[0004] Therefore, repairing or reconstructing the defect of the medial malleolus is of great significance to restore the stability and balance of the ankle joint of the patient. The current traditional reconstruction methods have the following shortcomings: bone transplantation has poor anti-infection ability and is prone to absorption of transplanted bone after transplantation; bone transportation takes a long time, care is difficult, and some patients cannot tolerate external fixators; vascularized bone transplantation has a short bone healing time after surgery, but requires physicians to be proficient in the use of microsurgery techniques. Moreover, the anatomical structure is not restored sufficiently after traditional bone grafting reconstruction, the stress state is poor, and the recovery time is long. Utility Model Content

[0005] The utility model aims to provide a prosthesis for repairing the defect of the medial malleolus of the tibia, so as to solve the problems existing in the traditional medial malleolus reconstruction technology, such as the poor anti-infection ability of bone transplantation, the absorption of transplanted bone, the difficulty in nursing during bone transportation, the high requirements for doctors for vascularized bone transplantation, as well as the technical problems of insufficient restoration of the bone anatomical structure of the ankle joint after reconstruction, poor stress state and long recovery time.

[0006] The technical solutions adopted to solve the above technical problems are:

[0007] The utility model discloses a prosthesis for repairing defect of medial malleolus of tibia, comprising a prosthetic body imitating the defective part of medial malleolus, wherein the prosthetic body is provided with a porous structure and ligament suture holes, the porous structure respectively connects the inner side and the outer side of the prosthetic body, and the porous structure is connected with the ligament suture holes.

[0008] The utility model has at least the following beneficial effects: the contour-like body is customized according to the defective part of the patient's medial malleolus; when the patient is fitted with a tibial medial malleolus defect repair prosthesis, the contour-like body can simulate the shape of the patient's defective medial malleolus, restore the original position and matching relationship of the patient's tibia, fibula and talus, and facilitate the restoration of the patient's ankle joint anatomical structure and stress state.

[0009] The prosthetic body is provided with a porous structure, which can form a connected pore structure inside the prosthetic body, providing growth space for bone tissue to grow into the tibial medial malleolus defect repair prosthesis. The porous structure also facilitates the transportation of nutrients and metabolic substances, which is convenient for the growth of bone tissue. The porous structure conducts the medial and lateral sides of the prosthetic body, effectively realizing the integration of bone tissue and the tibial medial malleolus defect repair prosthesis, and improving the mechanical stability of the bone repair site.

[0010] The contoured body is provided with ligament suture holes, through which the doctor can sew the patient's ligaments and the tibial medial malleolus defect repair prosthesis together, thereby improving the reconstruction effect of the patient's ankle joint ligaments and accelerating the patient's recovery.

[0011] As a further improvement of the above technical solution, the porous structure is provided in plurality and is interconnected.

[0012] Through the above-mentioned setting, multiple interconnected porous structures can further reduce the weight of the tibial medial malleolus bone defect repair prosthesis, avoid postoperative discomfort caused by unbalanced weight on both feet, and further improve the local mechanical stability of the patient after bone defect repair.

[0013] As a further improvement of the above technical solution, a plurality of ligament suture holes are provided, and each of the ligament suture holes is connected to the porous structure.

[0014] Through the above arrangement, the connection between the contoured body and the patient's ligament is further strengthened, thereby increasing the reconstruction effect of the ligament on the human ankle joint.

[0015] As a further improvement of the above technical solution, the prosthetic body is further provided with a simulated joint surface and an inner edge protrusion, the simulated joint surface is located at the distal end of the prosthetic body and close to the talus, and the inner edge protrusion is located in the middle of the prosthetic body.

[0016] Through the above arrangement, the simulated joint surface is located at the distal end of the prosthetic body and is arranged close to the talus, so that the simulated joint surface can imitate the joint surface of the ankle joint to the greatest extent, which is convenient for maintaining the mobility of the patient's ankle joint after surgery. During the operation, the doctor can accurately match the tibial medial malleolus defect repair prosthesis with the bone through the inner edge protrusion to improve the local mechanical stability of the patient after the bone defect is repaired.

[0017] As a further improvement of the above technical solution, the tibial medial malleolus defect repair prosthesis also includes two pinholes for inserting Kirschner wires.

[0018] Through the above arrangement, the doctor can insert a Kirschner wire into the needle hole during the operation to temporarily fix the contoured body, thereby improving the efficiency of the operation.

[0019] As a further improvement of the above technical solution, the tibial medial malleolus defect repair prosthesis also includes two threading holes for inserting cables.

[0020] Through the above arrangement, during the operation, the doctor can pass the cable through the threading hole and tie the cable to the tibia to achieve the bundling of the contouring body and the tibia, thereby improving the stability of the connection between the two.

[0021] As a further improvement of the above technical solution, the tibial medial malleolus defect repair prosthesis further includes a bone-setting wing connected to the contoured main body, and the bone-setting wing extends along the direction of the tibial shaft.

[0022] Through the above arrangement, the tibial medial malleolus defect repair prosthesis is connected to the tibial bone through the bone wing to strengthen its own stability. The bone wing can effectively share the vertical pressure and rotation torque of the tibia to prevent the tibial medial malleolus defect repair prosthesis from breaking.

[0023] As a further improvement of the above technical solution, a bone screw hole is provided on the bone wing, and the bone screw hole is equipped with a bone screw.

[0024] Through the above arrangement, the bone wing is connected and fixed via the bone screw hole and the matching bone screw.

[0025] As a further improvement of the above technical solution, a plurality of bone screw holes are provided, and the holes are spaced apart along the extension direction of the bone wing.

[0026] Through the above arrangement, a plurality of bone screw holes are arranged along the extension direction of the bone wing to strengthen the connection between the tibial medial malleolus defect repair prosthesis and the tibia.

[0027] As a further improvement of the above technical solution, the contoured body and the bone-setting wing are integrally formed.

[0028] Through the above arrangement, the integrally formed contoured main body and bone grafting wings can further improve the mechanical stability of the tibial medial malleolus defect repair prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0030] Figure 1 It is a front view of the tibial medial malleolus defect repair prosthesis provided by the embodiment of the utility model;

[0031] Figure 2 It is a rear view of the tibial medial malleolus defect repair prosthesis provided by the embodiment of the utility model;

[0032] Figure 3 It is a schematic structural diagram of the tibial medial malleolus defect repair prosthesis provided by the embodiment of the utility model at another viewing angle;

[0033] Figure 4 It is a schematic diagram of the connection between the tibial medial malleolus defect repair prosthesis and the bone screw provided by the embodiment of the utility model;

[0034] Figure 5 It is a schematic diagram of the connection between the tibial medial malleolus defect repair prosthesis provided by the embodiment of the utility model and the tibia and talus.

[0035] The following are marked in the accompanying drawings:

[0036] 100. Prosthesis for repairing medial tibial malleolus defect;

[0037] 200, contoured body; 210, porous structure; 220, articular surface; 230, inner edge protrusion;

[0038] 300, ligament suture hole;

[0039] 400, through hole;

[0040] 510, bone wing; 520, bone screw hole; 530, bone screw;

[0041] 610, tibia; 620, talus. DETAILED DESCRIPTION

[0042] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0043] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] In the description of the utility model, if there is a word description such as "several", it means one or more, and the meaning of "more" is two or more. Greater than, less than, and more than are understood to exclude the number itself, and above, below, and within are understood to include the number itself. If there is a description of the first, second, and third, it is only used to distinguish the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0045] It should be noted that the Z direction in the accompanying drawings is from the lower side of the tibial medial malleolus defect repair prosthesis to the upper side.

[0046] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0047] Reference Figures 1 to 5 Several embodiments of the tibial medial malleolus defect repair prosthesis of the present invention are given below.

[0048] like Figures 1 to 5 As shown, the tibial medial malleolus bone defect repair prosthesis 100 of the embodiment of the utility model includes a contoured body 200, which is customized according to the bone defect site of the medial malleolus of the patient's tibia 610. Specifically, the contoured body 200 is designed according to the anatomical morphology of the tibia 610 and the talus 620 of the patient's affected foot or the contralateral foot before surgery. After the tibial medial malleolus bone defect repair prosthesis 100 is installed, the contoured body 200 can simulate the appearance of the patient's defective medial malleolus and restore the original position and matching relationship of the patient's tibia 610, fibula and talus 620.

[0049] In this embodiment, the contoured body 200 is made of titanium alloy material by additive manufacturing technology, and the additive manufacturing technology accurately controls the shape and internal structure of the contoured body 200 according to the three-dimensional CT scanning data of the patient before surgery.

[0050] It is understandable that the contoured body 200 is provided with a porous structure 210, such as Figures 1 to 4 As shown, the two opposite ends of the porous structure 210 are connected to the inner side and the outer side of the contoured body 200, respectively, so that the interior of the contoured body 200 forms a connected, regular, and orderly pore structure, providing the necessary space environment for the growth of bone tissue, and effectively promoting the early formation of bone tissue. In addition, the porous structure 210 can also promote the transportation of nutrients and metabolites, induce osteoblasts to adhere, proliferate, and differentiate on the tibial medial malleolus bone defect repair prosthesis 100, realize the effective integration of bone tissue and the tibial medial malleolus bone defect repair prosthesis 100, and improve the overall stability of the bone repair site.

[0051] In this embodiment, the porous structure 210 made of titanium alloy material can effectively reduce the elastic modulus of titanium alloy material, which is conducive to the conduction of interface stress to the internal space of the material, increasing the fusion effect between the prosthetic body 200 and bone tissue, and forming a stable bone-metal interface integration between the bone and the titanium alloy material, so that the prosthetic body 200 can be better fixed. The titanium alloy prosthetic body 200 with the porous structure 210 can take into account both mechanical properties and physiological properties, making bone defect repair easier.

[0052] It is understandable that the contoured body 200 is provided with a ligament suture hole 300, such as Figure 1 , Figure 3 and Figure 4 As shown, the ligament suture hole 300 is set according to the shape of the suture needle used to suture the ligament during surgery. Through the ligament suture hole 300, the doctor can suture the ligament with the tibial medial malleolus defect repair prosthesis 100. The ligament suture hole 300 is connected to the porous structure 210, which is conducive to improving the reconstruction effect of the ligament.

[0053] In this embodiment, the ligament suture hole 300 is located at the distal end of the tibial medial malleolus defect repair prosthesis 100 .

[0054] It is understandable that there are multiple porous structures 210 , which are respectively laid at the middle end and the distal end of the tibial medial malleolus defect repair prosthesis 100 , and all the porous structures 210 are interconnected inside the contoured body 200 .

[0055] The porous structure 210 of the titanium alloy has biological properties superior to those of the solid structure while ensuring structural mechanics and connectivity. The porous structure 210 is more conducive to the early formation of bone tissue and realizes the integration between the surrounding bone tissue and the contoured body 200, further improving the local mechanical stability after bone defect repair.

[0056] In addition, the porous structure 210 can effectively reduce the weight of the contoured body 200 compared to the solid structure. In this embodiment, the actual weight of the tibial medial malleolus defect repair prosthesis 100 is between 20 grams and 30 grams, which effectively reduces the postoperative discomfort of the patient caused by the imbalance of weight on both sides of the foot.

[0057] It is understandable that there are a plurality of ligament suture holes 300, and each ligament suture hole 300 is connected to the porous structure 210. This further strengthens the connection between the contoured body 200 and the patient's ligament, and further improves the reconstruction effect of the ligament.

[0058] It is understandable that the imitation body 200 is provided with an imitation joint surface 220, which is located at the distal end of the tibial medial malleolus defect repair prosthesis 100 and is arranged close to the talus 620. Figure 2The shape of the simulated joint surface 220 is customized according to the patient's ankle joint surface and is processed through polishing and other processing steps to restore the connection surface between the simulated body 200 and the talus 620 to the greatest extent, ensuring that the patient can retain the range of motion of the ankle joint after surgery without affecting the patient's rehabilitation.

[0059] It can be understood that the contoured body 200 is provided with an inner edge protrusion 230, and the inner edge protrusion 230 is located in the middle of the tibial medial malleolus defect repair prosthesis 100, such as Figure 2 The shape of the inner edge protrusion 230 is customized according to the shape and structure of the tibia 610 of the affected foot or the contralateral foot of the patient before surgery, so that the tibial medial malleolus defect repair prosthesis 100 can accurately match the spatial position of the bone during installation, improve the matching accuracy between the contoured body 200 and the bone tissue, and further improve the local mechanical stability after the bone defect is repaired.

[0060] It is understandable that the tibial medial malleolus defect repair prosthesis 100 is provided with a through hole 400. Figures 1 to 3 shown.

[0061] In some embodiments, the through hole 400 is a needle hole, and the doctor can insert a Kirschner wire into the needle hole during surgery to temporarily fix the contoured body 200 and improve the efficiency of the surgery.

[0062] In other embodiments, the through hole 400 is a threading hole. During surgery, the doctor can pass the cable through the threading hole and use the cable to tie the contour body 200 and the tibia 610 to improve the stability of the connection between the two.

[0063] In this embodiment, two through holes 400 are provided and both are located at the middle end of the tibial medial malleolus defect repair prosthesis 100 .

[0064] It is understandable that the tibial medial malleolus defect repair prosthesis 100 includes a bone graft wing 510 extending along the tibia 610, and the bone graft wing 510 is connected to the contoured body 200, such as Figures 1 to 4 As shown in FIG. 1 , since the bone-setting wing 510 extends along the direction of the tibia 610 diaphysis, when the tibial medial malleolus defect repair prosthesis 100 is installed, the bone-setting wing 510 can be connected to the tibia 610 bone to enhance the stability of the tibial medial malleolus defect repair prosthesis 100. The bone-setting wing 510 is made according to the bionic mechanics of the foot to effectively share the vertical pressure and rotation torque of the tibia 610 to prevent the tibial medial malleolus defect repair prosthesis 100 from breaking.

[0065] It can be understood that the bone wing 510 is provided with a bone screw hole 520, and the bone screw hole 520 is equipped with a bone screw 530, that is, the bone wing 510 and the tibia 610 bone are fixed by the connection method of the bone screw 530 penetrating the bone screw hole 520 and the tibia 610 bone, such as Figures 1 to 5 As shown, the stability of the connection between the two is further strengthened.

[0066] In this embodiment, the aperture range of the bone screw hole 520 is between 2.8 mm and 5.1 mm. The bone screw hole 520 can be matched with the common bone screw 530 on the market. The utility model does not improve the bone screw 530. The bone screw 530 on the market can be directly purchased for use with the tibial medial malleolus defect repair prosthesis 100. There is no need to customize the bone screw 530 or equip special implants and their supporting instruments, which saves costs and reduces the surgical preparation cycle.

[0067] In this embodiment, the bone wing 510 is provided with a plurality of bone screw holes 520 at intervals along its extension direction. Figures 1 to 4 As shown, the connection stability between the tibial medial malleolus defect repair prosthesis 100 and the patient's tibia 610 bone is enhanced.

[0068] It is understandable that the number of the bone screw holes 520 is between two and six. The number of the bone screw holes 520 can be adjusted according to the size and length of the tibial medial malleolus defect repair prosthesis 100 customized for the patient. If the size and length of the tibial medial malleolus defect repair prosthesis 100 are too large, the number of the bone screw holes 520 on the bone wing 510 needs to be increased to strengthen the connection strength between the tibial medial malleolus defect repair prosthesis 100 and the tibia 610 bone.

[0069] In this embodiment, the distal end of the tibial medial malleolus defect repair prosthesis 100 is the lower end of the tibial medial malleolus defect repair prosthesis 100, the contoured body 200 is arranged at the lower end of the tibial medial malleolus defect repair prosthesis 100, the bone-setting wing 510 is arranged at the upper end of the tibial medial malleolus defect repair prosthesis 100, and the through hole 400 is arranged at the connection between the contoured body 200 and the bone-setting wing 510.

[0070] In this embodiment, the contoured body 200 and the bone grafting wing 510 are integrally formed, and both are made of titanium alloy material through additive manufacturing technology, so that the tibial medial malleolus defect repair prosthesis 100 can be directly customized according to the anatomical structure and stress intensity of the patient's bone defect site.

[0071] The preferred implementation methods of the utility model are described in detail above, but the invention of the utility model is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the utility model. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A prosthesis for repairing a defect of the medial tibial malleolus, characterized in that: The invention comprises a profiling body imitating the defective part of the medial malleolus, wherein the profiling body is provided with a porous structure and ligament suture holes, wherein the porous structure respectively connects the inner side and the outer side of the profiling body, and the porous structure is connected with the ligament suture holes.

2. The tibial medial malleolus defect repair prosthesis according to claim 1, characterized in that: The porous structures are provided in plurality and are interconnected.

3. The tibial medial malleolus defect repair prosthesis according to claim 2, characterized in that: There are a plurality of ligament suture holes, and each of the ligament suture holes is connected to the porous structure.

4. The tibial medial malleolus defect repair prosthesis according to claim 1, characterized in that: The prosthetic body is also provided with a prosthetic joint surface and an inner edge protrusion. The prosthetic joint surface is located at the distal end of the prosthetic body and close to the talus, and the inner edge protrusion is located in the middle of the prosthetic body.

5. The tibial medial malleolus defect repair prosthesis according to claim 1, characterized in that: The utility model also comprises two needle holes for inserting Kirschner wires.

6. The prosthesis for repairing medial tibial malleolus defect according to claim 1, characterized in that: It also includes two threading holes for inserting cables.

7. The prosthesis for repairing medial tibial malleolus defect according to claim 1, characterized in that: It also includes a bone-setting wing connected to the contoured body, and the bone-setting wing extends along the direction of the tibial shaft.

8. The tibial medial malleolus defect repair prosthesis according to claim 7, characterized in that: The bone setting wing is provided with a bone setting screw hole, and the bone setting screw hole is equipped with a bone setting screw.

9. The prosthesis for repairing medial tibial malleolus defect according to claim 8, characterized in that: The bone screw holes are provided in plurality and are arranged at intervals along the extending direction of the bone wing.

10. The prosthesis for repairing medial tibial malleolus defect according to claim 7, characterized in that: The contoured body and the bone-setting wing are integrally formed.

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