CN213607201U - Knee joint prosthesis capable of keeping personalized customization of ankle joint surface - Google Patents
Knee joint prosthesis capable of keeping personalized customization of ankle joint surface Download PDFInfo
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- CN213607201U CN213607201U CN202022186708.4U CN202022186708U CN213607201U CN 213607201 U CN213607201 U CN 213607201U CN 202022186708 U CN202022186708 U CN 202022186708U CN 213607201 U CN213607201 U CN 213607201U
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- prosthesis
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- tibial prosthesis
- personalized customization
- joint surface
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Abstract
The utility model provides a keep individualized customized knee joint false body of ankle joint face, include: the first tibial prosthesis, the second tibial prosthesis and the connecting assembly, wherein a split interlocking structure is arranged between the lower part of the first tibial prosthesis and the upper part of the second tibial prosthesis, and the connecting assembly passes through the interlocking structure to fix the first tibial prosthesis and the second tibial prosthesis; the lower end face of the second tibia prosthesis is provided with at least one fixing cylinder and at least one fixing cone, the fixing cylinders and the fixing cones are arranged at intervals and used for driving the fixing cylinders and the fixing cones into residual tibia sclerotin in an operation to fix the prosthesis. The advantages are that: so that the tibia far-end joint surface is kept in the tibia operation, and the excessive healthy bone of a patient is prevented from being removed in the operation; meanwhile, the original freedom degree of the naked joint of the patient can be kept, and the postoperative life quality of the patient is improved.
Description
Technical Field
The utility model belongs to the technical field of the medical instrument technique and specifically relates to a keep individualized customized knee joint false body of ankle joint face.
Background
The tibia is an important component of the lower limb of a human body and plays a role in maintaining weight bearing walking of the lower limb and keeping normal ankle mobility, and generally, the below-knee amputation is a standard operation scheme for treating malignant tumors of the middle and lower segments of the tibia. However, with the development of limb protection technology, material science and 3D printing technology, autologous bone, allogeneic bone and metal prostheses are used to reconstruct the segmental bone defect after the resection of the distal tibial tumor, and many researchers believe that the long-term treatment effect of the segmental bone defect after the resection of the distal tibial tumor through the prosthesis reconstruction is better.
The main mode of the existing method for treating malignant tumor of the middle and lower segments of the tibia is to remove a tumor part, when the tumor erodes the articular surface at the far end of the tibia, a prosthesis and a talus are required to be fused together, a screw is used to penetrate through the prosthesis and to be driven into the talus, and the near end of the prosthesis is fixed in a medullary. Sometimes, the tumor boundary is closer to the joint surface at the far end of the tibia, if the joint surface is reserved, the condition that the prosthesis is fixed and unstable exists, the joint surface can only be cut off forcedly to be used as the tibial prosthesis for fusing the tibia distance joint, so that the healthy bone of a patient can be cut off too much, the original degree of freedom of the ankle joint is lost, and the postoperative life quality of the patient is reduced.
Therefore, it is necessary to design a set of prostheses to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a keep individualized customized knee joint false body of ankle joint face, the purpose is overcome above-mentioned technical defect at least for keep shin bone distal end articular surface in the art, avoid the too much healthy sclerotin of excision patient in the art, improve false body and sclerotin biological fixed simultaneously, with the stability of reinforcing false body implantation.
In order to realize the purpose of the utility model, the utility model provides a following technical scheme:
a knee prosthesis that preserves personalized customization of an ankle joint surface, comprising: the split-type tibial prosthesis comprises a first tibial prosthesis, a second tibial prosthesis and a connecting assembly, wherein a split-type interlocking structure is arranged between the lower part of the first tibial prosthesis and the upper part of the second tibial prosthesis, and the connecting assembly penetrates through the interlocking structure to fix the first tibial prosthesis and the second tibial prosthesis;
the lower end face of the second tibia prosthesis is provided with at least one fixing cylinder and at least one fixing cone, the fixing cylinders and the fixing cones are arranged at intervals and used for driving the fixing cylinders and the fixing cones into residual tibia sclerotin in an operation to fix the prosthesis.
Preferably, the fixed cylinder and the fixed cone are of a solid structure.
Preferably, the fixing cylinder and the fixing cone are externally coated with a first bone trabecular structure.
Preferably, a second trabecular bone structure is arranged on the lower end face of the second tibial prosthesis, and the upper end portions of the fixing cylinder and the fixing cone are connected with the second trabecular bone structure.
Preferably, the porosity of the first trabecular bone structure is 50% -80%;
preferably, the porosity of the second trabecular bone structure is between 50% and 80% each.
Preferably, a plurality of suture holes are formed in the lower portion of the second tibial prosthesis, and the suture holes are located on one side close to the second trabecular bone structure.
Preferably, the first tibial prosthesis comprises a broach inserted into a medullary cavity of a tibia and a first osteotomy segment connected with the broach, the second tibial prosthesis comprises a second osteotomy segment and an implant part integrally formed with the second osteotomy segment, and the first osteotomy segment and the second osteotomy segment are in a split interlocking structure.
Preferably, the interlocking structure is a slider-card slot structure.
The utility model discloses a keep individualized customized knee joint false body of ankle joint face, its advantage is:
1. the prosthesis structure designed by the utility model can keep the tibia far-end joint surface in the tibia operation, and avoid cutting excessive healthy bone of a patient in the operation; meanwhile, the original freedom degree of the patient's bare joint can be kept, and the postoperative life quality of the patient can be improved;
2. the utility model discloses well cylinder, circular cone, first bone trabecula structure, the design of second bone trabecula structure, its purpose makes human self sclerotin grow into the false body surface, can improve the fixed of false body and sclerotin biology, strengthens the implantation stability and the long-term bone of false body and grows into, and the microporous structure on its surface, increases the frictional force between false body and the cross-section sclerotin
3. The inside of the cylinder and the cone is designed into a solid structure, so that the length of the prosthesis and the bone ingrowth capacity are further enhanced.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a knee joint prosthesis of the present invention, which retains the personalized customization of the ankle joint surface;
FIG. 2 is a schematic view of a cutaway configuration of a first tibial prosthesis;
FIG. 3 is a schematic view of a cutaway configuration of a second tibial prosthesis;
FIG. 4 is a diagram illustrating the use of the knee prosthesis of the present invention with personalized customization of the ankle joint surface;
FIG. 5 is a front view of the locking bolt;
wherein:
a first tibial prosthesis 10, a broach 11, a first osteotomy segment 12, a cement groove 13;
a second tibial prosthesis 20, a fixation cylinder 21, a fixation cone 22, a first trabecular bone structure 23, a second trabecular bone structure 24, a suture hole 25, a second osteotomy segment 26, an implant 27;
a connection assembly 30 is connected.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
Fig. 1 shows a schematic structural diagram of a knee joint prosthesis for preserving personalized customization of an ankle joint surface of the present invention, as shown in fig. 1, the knee joint prosthesis for preserving personalized customization of the ankle joint surface comprises: a first tibial prosthesis 10, a second tibial prosthesis 20, and a connecting assembly 30, wherein a lower portion of the first tibial prosthesis 10 and an upper portion of the second tibial prosthesis 20 are in a split interlocking configuration, and the connecting assembly 30 passes through the interlocking configuration to fix the first tibial prosthesis 10 and the second tibial prosthesis 20; the lower end surface of the second tibial prosthesis 20 is provided with at least one fixing cylinder 21 and at least one fixing cone 22, and the fixing cylinder 21 and the fixing cone 22 are arranged at intervals and used for driving the fixing cylinder 21 and the fixing cone 22 into residual bone of tibia in operation so as to fix the prosthesis. The utility model provides a knee joint false body structure has solved prior art, can't remain the technical defect of shin bone distal end articular surface at the shin bone operation in-process, has avoided the problem of the too much healthy sclerotin of excision patient in the operation, simultaneously, can make the naked joint of patient remain original degree of freedom, has improved the quality of life of patient's postoperative.
The utility model provides an among the technical scheme, titanium alloy is used to the false body material to adopt 3D printing technique, material increase manufacturing process, the clothes are cut out to the size, realize the good cooperation of false body and sclerotin.
Furthermore, as shown in fig. 1, the fixed cylinder 21 and the fixed cone 22 are both solid structures, and the bottom end surface is designed to be dome-shaped, so as to increase the supporting force of the fixed cylinder 21 and the fixed cone 22 and avoid the fracture during the driving process; in the operation process, the fixing column 21 and the fixing cone 22 are driven into the residual bone of the tibia to be biologically fixed with the residual bone. The inclination angles and the lengths of the fixing cylinder 21 and the fixing cone 22 are determined according to the shape, the thickness and the like of the left bone of the tibia; for example, if the tibia has thick bone left, the design lengths of the fixing cylinder 21 and the fixing cone 22 need to be longer; meanwhile, if the thicknesses of the residual bone substances are not consistent, the lengths of the cylinder and the cone which are driven into the residual bone substance on the thicker side are relatively longer.
Further optimizing the technical scheme, the fixing cylinder 21 and the fixing cone 22 are coated with the first bone trabecula structure 23, so that the biological fixation of the prosthesis and the sclerotin is improved, and the implantation stability and long-term bone ingrowth of the prosthesis are enhanced;
further optimizing the technical scheme, as shown in fig. 1, 3 and 4, a second trabecular bone structure 24 is arranged on the lower end face of the second tibial prosthesis 20, the upper end portions of the fixing cylinder 21 and the fixing cone 22 are connected with the second trabecular bone structure 24, and the first trabecular bone structure 23 is combined, so that the biological fixation of the prosthesis and the bone is further improved, and the friction force between the prosthesis and the bone on the osteotomy face is increased due to the microporous structure on the surface of the trabecular bone structure.
Because surplus sclerotin is shorter, for the stability that increases second shin bone false body 20 lower part, the utility model discloses an among the prosthesis structure, a plurality of suture hole 25 has been seted up in second shin bone false body 20 lower part, just suture hole 25 is located the one side that is close to second trabecular bone structure 24, bindes false body and surplus sclerotin through steel wire or stylolite.
Further, as shown in fig. 2, the first trabecular bone structure 23 is integrally formed with the fixation cylinder 21 and the fixation cone 22.
More specifically, referring to fig. 1, 2 and 3, the first tibial prosthesis 10 includes a broach 11 for inserting into a medullary cavity of a tibia and a first osteotomy segment 12 connected to the broach 11, the second tibial prosthesis 20 includes a second osteotomy segment 26 and an implant 27 integrally formed with the second osteotomy segment 26, and the first osteotomy segment 12 and the second osteotomy segment 26 are in a split interlocking structure. In more detail, the fixation cylinder 21, the fixation cone 22, the second trabecular bone structure 24, suture holes 25 are all located on the implant 27.
In order to increase the stability of the prosthesis, as shown in fig. 2 and 2, the broach 11 is provided with a cement type, and a cement groove 13 is vertically formed on the surface of the broach, so that the design can effectively increase the contact area between the broach 11 and the patient bone cement, so as to increase the holding force of the cement on the broach 11, thereby effectively preventing the broach 11 from rotating after being implanted, and further enhancing the stability of the broach 11 after being implanted; preferably, the broach 11 may also be designed to be of a biotype, and the biotype broach 11 may be made of both Ti coating and Ti + HA coating;
further, the length and diameter of the broach 11 are determined according to the patient's tibia and tibia medullary cavity.
In the utility model, in order to adapt to the actual condition requirement in the operation, when a plurality of osteotomies are needed, two adjusting pads (not shown in the figure) are also arranged for adjusting the length of the osteotomy in the operation; the adjusting pad is an optional structure and can also be used as a standard assembly according to the actual requirement and provided with the prosthesis. The adjusting pad is a part with a trabecular bone grid structure, which is machined or 3D printed, the part is a hollow cylinder, and the intramedullary nail 11 is inserted into the medullary cavity of the tibia after penetrating through the hollow cylinder.
Further, the second tibial prosthesis 20 is 3D print molded.
More specifically, the connecting assembly 30 is a locking bolt (as shown in fig. 5), so that the first tibial prosthesis 10 and the second tibial prosthesis 20 can be prevented from moving axially and circumferentially after being locked by the locking bolt, and the intraoperative installation is facilitated.
The utility model discloses in the design scheme, the part silk footpath that bone trabecula and cortical bone contacted sets up 600 and adds jar 800 μm, and the aperture sets up 500 +/-300 μm, and the porosity sets up 50% -80%, and the part silk footpath that bone trabecula and cancellous bone contacted sets up 100 and adds jar 400 μm, and the aperture sets up 100 and adds jar 400 μm, and the porosity sets up 50% -80%, and its microporous construction further improves the stability that the false body was implanted.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A knee prosthesis that preserves personalized customization of an ankle joint surface, comprising: a first tibial prosthesis (10), a second tibial prosthesis (20), and a connecting assembly (30), wherein a split interlocking structure is arranged between the lower part of the first tibial prosthesis (10) and the upper part of the second tibial prosthesis (20), and the connecting assembly (30) passes through the interlocking structure to fix the first tibial prosthesis (10) and the second tibial prosthesis (20);
the method is characterized in that: the lower end face of the second tibia prosthesis (20) is provided with at least one fixing cylinder (21) and at least one fixing cone (22), the fixing cylinder (21) and the fixing cone (22) are arranged at intervals, and the fixing cylinder (21) and the fixing cone (22) are used for being driven into residual tibia sclerotin in an operation to fix the prosthesis.
2. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 1, wherein: the fixed cylinder (21) and the fixed cone (22) are of solid structures.
3. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 1, wherein: the fixing cylinder (21) and the fixing cone (22) are coated with a first bone trabecula structure (23) outside.
4. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 1, wherein: a second bone trabecula structure (24) is arranged on the lower end face of the second tibial prosthesis (20), and the upper end parts of the fixing cylinder (21) and the fixing cone (22) are connected with the second bone trabecula structure (24).
5. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 3, wherein: the porosity of the first trabecular bone structure (23) is 50-80%.
6. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 4, wherein: the porosity of the second trabecular bone structure (24) is 50-80%.
7. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 4, wherein: a plurality of suture holes (25) are formed in the lower portion of the second tibial prosthesis (20), and the suture holes (25) are located on one side close to the second trabecular bone structure (24).
8. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 1, wherein: the first tibial prosthesis (10) comprises a broach (11) for inserting into a medullary cavity of a tibia and a first osteotomy segment (12) connected with the broach (11), the second tibial prosthesis (20) comprises a second osteotomy segment (26) and an implant part (27) integrally formed with the second osteotomy segment (26), and the first osteotomy segment (12) and the second osteotomy segment (26) are in a split interlocking structure.
9. The knee joint prosthesis for preserving personalized customization of the ankle joint surface of claim 1, wherein: the interlocking structure is a slider clamping groove structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022186708.4U CN213607201U (en) | 2020-09-29 | 2020-09-29 | Knee joint prosthesis capable of keeping personalized customization of ankle joint surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022186708.4U CN213607201U (en) | 2020-09-29 | 2020-09-29 | Knee joint prosthesis capable of keeping personalized customization of ankle joint surface |
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| CN213607201U true CN213607201U (en) | 2021-07-06 |
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| CN202022186708.4U Active CN213607201U (en) | 2020-09-29 | 2020-09-29 | Knee joint prosthesis capable of keeping personalized customization of ankle joint surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113712710A (en) * | 2021-09-13 | 2021-11-30 | 上海市第十人民医院 | Assembled ankle joint tumor type prosthesis |
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2020
- 2020-09-29 CN CN202022186708.4U patent/CN213607201U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113712710A (en) * | 2021-09-13 | 2021-11-30 | 上海市第十人民医院 | Assembled ankle joint tumor type prosthesis |
| CN113712710B (en) * | 2021-09-13 | 2024-02-13 | 上海市第十人民医院 | Assembled ankle joint tumor type prosthesis |
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