CN209808652U - Ankle joint prosthesis - Google Patents
Ankle joint prosthesis Download PDFInfo
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- CN209808652U CN209808652U CN201920259819.8U CN201920259819U CN209808652U CN 209808652 U CN209808652 U CN 209808652U CN 201920259819 U CN201920259819 U CN 201920259819U CN 209808652 U CN209808652 U CN 209808652U
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Abstract
The utility model discloses an ankle joint false body, including talus subassembly and shin bone subassembly, the bulb of talus subassembly cooperatees with the arc recess of establishing on the shin bone subassembly, be equipped with the a set of potsherd that is used for reducing wear on the arc recess of shin bone subassembly, a set of potsherd dispersion is arranged, and the potsherd adopts welding mode to be connected with the arc recess, and the outer concave curved surface of potsherd contacts with the bulb surface of talus subassembly and forms the friction pair. The liner is distributed with a plurality of ceramic plates, the friction between metal or ceramic and high molecular polymer is converted into the friction between ceramic and metal or ceramic, and gaps are arranged among the ceramic plates to contain lubricating liquid, so that the friction coefficient of the talus component and the tibia component is reduced, the abrasion loss is reduced, and the metal ion separation is reduced; meanwhile, the cracking risk of the ceramic prosthesis can be reduced, and the service life is prolonged.
Description
Technical Field
The utility model belongs to the technical field of implant false body in biomedical engineering orthopedics and specifically relates to an ankle joint false body.
Background
Artificial ankle replacement is an effective clinical treatment for ankle injuries caused by trauma or disease. The artificial ankle joint consists of a tibia component, a talus component and a liner, wherein the common liner is made of high polymer or metal, the talus component is made of metal or ceramic or high polymer material, and the talus component and the liner are contacted to form a pair of friction pairs.
The artificial ankle joints used clinically at present are of the following types: 1. the metal talus component and the metal liner are matched and matched, and toxic metal ions are separated out in a long-term friction and abrasion process of a friction pair formed by the matching and matching pair, and chronic pathological changes can be caused when certain concentration is accumulated in a human body, and meanwhile, abrasion debris can induce bone tissues around the prosthesis to generate osteolysis; 2. the metal or ceramic talus component and the polymer liner are matched, a friction pair formed by the matching pair enables the wear rate of the polymer liner to be very high, the most commonly used polymer material is ultra-high molecular weight polyethylene, the annual wear loss of the polymer liner is about 0.2mm, the thickness of the polymer liner can be continuously reduced in a long-term friction process, the strength of the liner is further influenced, the manual joint system generates the contradiction between the large movement range and the mechanical strength of the joint, in order to solve the contradiction, the thickness of the liner must be thickened, the diameter of the talus component matched with the liner is inevitably reduced, and therefore the movement range of the joint system can be reduced, the joint is further dislocated, and the failure is caused; 3. the ceramic talus component and the ceramic liner are matched and matched, and the friction pair formed by the matched and matched pair has the advantages of minimal abrasion, inertia and good biocompatibility of the ceramic, so that the ceramic becomes the first choice for the current clinical use of the artificial ankle joint system. However, due to the inherent brittleness of the ceramic material, if the thickness is thin, the ceramic liner is easy to crack, and in order to overcome the defect, the thickness of the ceramic liner must be thickened, but the problem that the size of the ceramic talus bone component matched with the ceramic liner must be reduced is caused, so that the movement range of the artificial ankle joint is limited, and the joint dislocation occurs, and the artificial joint fails.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model aims to solve the technical problem that an ankle joint false body is provided to reach reducing wear, reduce the cracked risk of pottery, reduce the metal ion release, increase artifical ankle joint motion range, extension ankle joint false body life's purpose.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
this ankle joint prosthesis, including talus subassembly and shin bone subassembly, the bulb of talus subassembly cooperatees with the arc recess of establishing on the shin bone subassembly, be equipped with a set of potsherd that is used for reducing wearing and tearing on the arc recess of shin bone subassembly, a set of potsherd dispersion is arranged, and the potsherd adopts welding mode to be connected with the arc recess, and the outer concave curved surface of potsherd contacts with the bulb surface of talus subassembly and forms the friction pair.
Preferably, the outer concave curved surfaces of the group of ceramic plates are in the same curved surface.
Preferably, an intermediate is arranged between the ceramic plates, the intermediate is a high molecular polymer, and the outer surface of the high molecular polymer is lower than the outer concave curved surface of the ceramic plates.
Preferably, the ball head surface of the talar component is provided with a group of pits for storing human body fluid.
Preferably, the group of ceramic plates may be in the shape of a cylinder and/or a polygonal column.
Preferably, the surfaces of the talus component and the tibia component, which are in contact with host bones, are provided with a group of holes which are suitable for human tissue growth, convenient for biological connection and enhanced in clinical long-term connection effect.
Preferably, the tibia assembly comprises a tibia prosthesis handle and a tibia prosthesis head part, the tibia prosthesis handle and the tibia prosthesis head are detachably connected, and the arc-shaped groove is formed in the tibia prosthesis head.
Preferably, the talus component and the tibia component can be made of titanium and alloy thereof, or tantalum and alloy thereof, or medical stainless steel or cobalt-chromium alloy, and the ceramic plate is made of biological ceramic.
Preferably, the set of ceramic plates is uniformly or/and non-uniformly spaced.
Preferably, the outer peripheral surface of the connecting part of the ceramic plate and the high molecular polymer is provided with grooves or bulges.
Compared with the prior art, the utility model, have following advantage:
the utility model is distributed with a plurality of ceramic plates to replace the integral ceramic lining with large thickness, thereby reducing the overall wall thickness of the artificial ankle joint and improving the diameter of the talus assembly, thereby increasing the motion range of the artificial ankle joint; the welded ceramic artificial ankle joint is reasonable in structural design, the liner is provided with the ceramic plates, friction between metal or ceramic and high polymer is converted into friction between ceramic and metal or ceramic, and meanwhile, gaps are formed among the ceramic plates to contain lubricating liquid, so that the friction coefficient of a talus assembly and a tibia assembly is reduced, the abrasion loss is reduced, and metal ion precipitation is reduced; meanwhile, the cracking risk of the ceramic prosthesis can be reduced, and the service life is prolonged; the mass of the ankle joint is reduced, so that the movement of the patient is lighter; the high molecular polymer is arranged between the ceramic plates, so that the ceramic plates have certain impact resistance and noise reduction effect.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is an exploded view of the ankle joint prosthesis of the present invention.
Fig. 2 is an exploded view of another structure of the ankle joint prosthesis of the present invention.
Fig. 3 is a schematic view of the general assembly of the ankle joint prosthesis of the present invention.
In the figure:
1. the bone plate comprises a talus component, a gasket 2, a tibia component 3, a connector 4, a ceramic plate group 5 and a pit 6.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
This ankle joint prosthesis, including talus subassembly and shin bone subassembly, the bulb of talus subassembly cooperatees with the arc recess of establishing on the shin bone subassembly, is equipped with a set of potsherd that is used for reducing wearing and tearing on the arc recess of shin bone subassembly, and a set of potsherd dispersion is arranged, and the potsherd adopts welding mode to be connected with the arc recess, and the outer concave curved surface of potsherd contacts with the bulb surface of talus subassembly and forms the friction pair.
The outer concave curved surfaces of the group of ceramic plates are positioned on the same curved surface; the ceramic plates are arranged in a non-uniform spacing mode, and the non-uniform spacing mode can increase the contact area and accordingly reduce the contact stress.
An intermediate is arranged between the ceramic plates, the intermediate is ultra-high molecular weight polyethylene, and the outer surface of the ultra-high molecular weight polyethylene is lower than the outer concave curved surface of the ceramic plates; the outer peripheral surface of the connecting part of the ceramic plate and the ultra-high molecular weight polyethylene is provided with a groove or a bulge, so that the fixing reliability can be improved.
Wherein, a group of holes which are suitable for the growth of human tissues, convenient for biological connection and enhanced clinical long-term connection effect are arranged on the contact surfaces of the talus component and the tibia component and the host bone, and the group of holes is a group of micropores; the micropores can make bone tissues grow into the micropores, strengthen the connection between the joints and host bones of the human body, improve the fixing reliability of the prosthesis in the human body and ensure the use effect.
The present invention is described in detail below with reference to specific embodiments, which are as follows:
as shown in fig. 1 to 3, the ankle joint prosthesis comprises a talus component 1 and a tibia component 3, wherein a ball head of the talus component is matched with an arc-shaped groove formed in the tibia component, a group of ceramic plates 5 used for reducing abrasion are arranged on the arc-shaped groove of the tibia component, the bottom ends of the ceramic plates are welded to the inner side of the arc-shaped groove, the ceramic plates are a group of ceramic plates 5 which are dispersedly arranged, and an outer concave curved surface of each ceramic plate is in contact with the outer surface of the ball head of the talus component to form a friction pair. Wherein, the talus component 1 and the tibia component 3 can be titanium and alloy thereof or tantalum and alloy thereof or medical stainless steel or cobalt-chromium alloy, and the ceramic plate is alumina ceramic.
The group of ceramic plates 5 can be all in the shape of a cylinder or a polygon prism, or the group of ceramic plates is in the shape of a combination of a cylinder and a polygon prism, and the group of ceramic plates are arranged at non-uniform intervals to increase the contact area with the surface of the ball head. And the outer concave curved surfaces of the ceramic plates are positioned on the same curved surface, so that the stress is uniform, stable and reliable.
The bottom ends of the ceramic plates are connected to the inner sides of the arc-shaped grooves in a laser welding mode, and the outer concave curved surfaces of the ceramic plates are located on the same spherical surface. Namely, a plurality of ceramic plates are dispersedly arranged to replace a thick integral ceramic lining, the integral wall thickness of the ankle joint prosthesis is reduced, the diameter of the ball head is improved, and therefore the motion range of the ankle joint prosthesis is enlarged.
An intermediate is arranged between the ceramic plates, and the intermediate is a high molecular polymer, preferably ultra-high molecular weight polyethylene. The outer surface of the high molecular polymer is lower than the outer concave curved surface of the ceramic plate, and has certain impact resistance and noise reduction effect.
Grooves or bulges are arranged on the peripheral surface of the connecting part of the ceramic chip and the high molecular polymer, and preferably, the grooves on the ceramic chip are spiral grooves. The high molecular polymer is embedded in the groove, so that the pull-out force and the binding force of the ceramic chip are increased, and the ceramic chip is reliably fixed. Or, the periphery of the connecting part of the ceramic plate and the high molecular polymer is provided with a convex spiral rib, and the same fixing effect can be achieved.
The surface of the ball head of the talus component is provided with a group of pits 6 for storing body fluid of a human body, and the group of pits is a group of micro pits for storing the body fluid of the human body, lubricating the contact surface of the ball head and the ceramic plate and reducing the friction between the ball head and the ceramic plate. And a certain gap is formed between the adjacent ceramic plates, and the gap can be used for storing body fluid of a human body, lubricating the contact surface of the ceramic plates and the ball head and reducing the friction between the ceramic plates and the ball head.
The tibia component comprises a tibia component part and a tibia component part, wherein the tibia component part comprises a tibia prosthesis handle and a tibia prosthesis head part, the tibia prosthesis handle and the tibia prosthesis head part are detachably connected, an arc-shaped groove is formed in the tibia prosthesis head, and the tibia prosthesis handle and the tibia prosthesis head part are detachably movably connected so as to facilitate doctor operation and product replacement in the operation process; and a set of holes is provided in the cylindrical structure.
Or, the inner side of the tibia component is provided with a groove, the groove is used for accommodating a connector 4, a group of ceramic plates are dispersedly arranged on the connector, the ceramic plates and the connector are matched to form a liner 2, the liner is fixed in the groove, and an outer concave curved surface of the ceramic plate is contacted with the outer surface of a ball head of the talus component to form a friction pair. Wherein the linker is a high molecular polymer. The bottom end of the ceramic wafer and the inner side of the backing do not need to be finished, the processing technology is reduced, the cost is reduced, and meanwhile, the ceramic wafer has certain impact resistance and noise reduction effect.
Furthermore, the outer peripheral surface of the connecting part of the ceramic plate and the high molecular polymer is provided with a groove, preferably, the groove on the ceramic plate is a spiral groove. The high molecular polymer is embedded in the groove, so that the pull-out force and the binding force of the ceramic chip are increased, and the ceramic chip is reliably fixed.
The ceramic plates are dispersedly arranged to replace a thick integral ceramic lining, the ceramic plates are distributed on the liner, the friction between metal or ceramic and high molecular polymer is converted into the friction between ceramic and metal or ceramic, and gaps are arranged among the ceramic plates to contain lubricating liquid, so that the friction coefficient of the talus assembly and the tibia assembly is reduced, the abrasion loss is reduced, and the metal ion precipitation is reduced; meanwhile, the cracking risk of the ceramic prosthesis can be reduced, and the service life is prolonged; the mass of the ankle joint is reduced, so that the movement of the patient is lighter; the high molecular polymer is arranged between the ceramic plates, so that the ceramic plates have certain impact resistance and noise reduction effect.
The above-mentioned is only for the description of the preferred embodiments of the present invention, and the above-mentioned technical features can be combined at will to form a plurality of embodiments of the present invention.
The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.
Claims (10)
1. The utility model provides an ankle joint prosthesis, includes talus subassembly and shin bone subassembly, and the bulb of talus subassembly cooperatees its characterized in that with the arc recess of establishing on the shin bone subassembly: the utility model discloses a shin bone subassembly, including shin bone subassembly, the ball head surface of shin bone subassembly is equipped with a set of potsherd that is used for reducing wearing and tearing on the arc recess of shin bone subassembly, a set of potsherd dispersion is arranged, and the potsherd adopts welding mode to be connected with the arc recess, and the outer concave curved surface of potsherd contacts with talus bone subassembly's ball.
2. The ankle prosthesis of claim 1, wherein: the outer concave curved surfaces of the group of ceramic plates are positioned on the same curved surface.
3. The ankle prosthesis of claim 1, wherein: an intermediate is arranged between the ceramic plates and is a high molecular polymer, and the outer surface of the high molecular polymer is lower than the outer concave curved surface of the ceramic plates.
4. The ankle prosthesis of claim 1 wherein: a group of pits for storing body fluid are arranged on the surface of the ball head of the talus component.
5. The ankle prosthesis of claim 1 wherein: the group of ceramic plates may be cylindrical and/or polygonal in shape.
6. The ankle prosthesis of claim 1 wherein: the surfaces of the talus component and the tibia component, which are in contact with host bones, are provided with a group of holes which are suitable for human tissue growth, are convenient for biological connection and enhance the clinical long-term connection effect.
7. The ankle prosthesis of claim 1 wherein: the tibia assembly comprises a tibia prosthesis handle and a tibia prosthesis head part, the tibia prosthesis handle and the tibia prosthesis head are detachably connected, and the arc-shaped groove is formed in the tibia prosthesis head.
8. The ankle prosthesis of claim 1 wherein: the talus component and the tibia component can be made of titanium and alloy thereof, tantalum and alloy thereof, medical stainless steel or cobalt-chromium alloy, and the ceramic plate is made of biological ceramic.
9. The ankle prosthesis of claim 1 wherein: the group of ceramic plates are arranged at uniform and/or non-uniform intervals.
10. The ankle prosthesis of claim 3 wherein: grooves or bulges are arranged on the peripheral surface of the connecting part of the ceramic chip and the high molecular polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920259819.8U CN209808652U (en) | 2019-03-01 | 2019-03-01 | Ankle joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920259819.8U CN209808652U (en) | 2019-03-01 | 2019-03-01 | Ankle joint prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209808652U true CN209808652U (en) | 2019-12-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920259819.8U Active CN209808652U (en) | 2019-03-01 | 2019-03-01 | Ankle joint prosthesis |
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| Country | Link |
|---|---|
| CN (1) | CN209808652U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109662815A (en) * | 2019-03-01 | 2019-04-23 | 安徽工程大学 | A kind of ankle prosthesis |
| CN112842633A (en) * | 2020-12-31 | 2021-05-28 | 上海晟实医疗器械科技有限公司 | 3D prints full ankle joint prosthesis of shin bone intramedullary nail |
-
2019
- 2019-03-01 CN CN201920259819.8U patent/CN209808652U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109662815A (en) * | 2019-03-01 | 2019-04-23 | 安徽工程大学 | A kind of ankle prosthesis |
| CN109662815B (en) * | 2019-03-01 | 2024-05-17 | 安徽工程大学 | Ankle joint prosthesis |
| CN112842633A (en) * | 2020-12-31 | 2021-05-28 | 上海晟实医疗器械科技有限公司 | 3D prints full ankle joint prosthesis of shin bone intramedullary nail |
| CN112842633B (en) * | 2020-12-31 | 2023-03-31 | 上海晟实医疗器械科技有限公司 | 3D prints full ankle joint prosthesis of shin bone intramedullary nail |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220526 Address after: 241000 218, building 1, commercial service center, Jiujiang Economic Development Zone, Wuhu District, China (Anhui) pilot Free Trade Zone, Wuhu City, Anhui Province Patentee after: Wuhu Tuogu Robot Technology Co.,Ltd. Address before: 241000 No. 8 Beijing Middle Road, Jiujiang District, Wuhu City, Anhui Province Patentee before: ANHUI POLYTECHNIC University |