CN104840279A - Knee joint prosthesis - Google Patents
Knee joint prosthesis Download PDFInfo
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- CN104840279A CN104840279A CN201510275614.5A CN201510275614A CN104840279A CN 104840279 A CN104840279 A CN 104840279A CN 201510275614 A CN201510275614 A CN 201510275614A CN 104840279 A CN104840279 A CN 104840279A
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Abstract
The invention provides a knee joint prosthesis comprising a tibial pad, a tibial support and a connecting part. The tibial support is rotatably relative to the tibial pad. The connecting part is disposed between the tibial pad and the tibial support in a height adjustable manner and is used to adjust a distance between the tibial pad and the tibial support. The height adjustable connecting part is disposed between the tibial pad and the tibial support; the tibial pad is rotatably relative to the tibial support. The knee joint prosthesis is elastic and rotatable, contact stress of a knee joint is reduced, joint wear is reduced, and the life of the knee joint prosthesis is longer.
Description
Technical field
The present invention relates to medical device technical field, in particular to a kind of knee-joint prosthesis.
Background technology
There is in normal human's knee joint inside the meniscus of spring function, due to meniscal existence, knee joint can be made when transmitted load to play the effect of steady load, therefore ensure that the kneed life-span.
In knee joint replacement prosthesis, it is rigid direct contact between tibial component and femoral component, namely metal condyle of femur and be hard contact between tibial plateau parts and polyethylene pad, faint distortion only by polythene material realizes spring function, serious wear between condyle of femur and pad, decrease the life-span of pad, and the faint distortion of pad can not realize the function of natural meniscus, makes troubles after its implant into body to patient.
Knee-joint prosthesis defect of the prior art is, after adding elastomeric element, what realize is have elastic fixing knee joint, namely can not realize rotating, so just make, between condyle of femur and pad, there is higher contact stress, there is edge load, form stress and concentrate, thus cause poly wearing and tearing.
Summary of the invention
Main purpose of the present invention is to provide a kind of knee-joint prosthesis, to solve the problem of the serious wear in prior art between condyle of femur and pad.
To achieve these goals, provide a kind of knee-joint prosthesis, comprising: tibial insert; Tibia support, is arranged rotationally relative to tibial insert; Connecting portion, is adjustable for heightly arranged between tibial insert and tibia support to regulate the distance between tibial insert and tibia support.
Further, connecting portion comprises: interlayer, and tibial insert is connected with interlayer rotationally; Elastomeric element, is arranged between interlayer and tibia support to regulate the distance between tibial insert and tibia support.
Further, interlayer is embedded in the first groove of the lower surface of tibial insert.
Further, between interlayer and tibial insert, be formed with the stop configurations of backstop tibial insert along the movement of interlayer longitudinal direction, tibial insert with interlayer along short transverse synchronizing moving.
Further, the cross section of interlayer is circular and the external diameter of interlayer from top to bottom successively decreases gradually, the cross section of the first groove is circular and the diameter of the first groove from top to bottom successively decreases gradually, and the external diameter of the lower surface of interlayer is greater than the diameter of the opening part of the first groove to form stop configurations.
Further, connecting portion also comprises: connect projection, outstanding is arranged on the part upper surface of tibia support, connecting projection is embedded in the second groove of the lower surface of interlayer, elastomeric element is arranged at interlayer and is connected between projection to regulate the distance between interlayer and the upper surface of tibia support, wherein, the cross section of connection projection is circular and the diameter of connection projection from top to bottom successively decreases gradually, the internal diameter of the second groove from top to bottom successively decreases gradually, and the diameter connecting the upper surface of projection is greater than the diameter of the opening part of the second groove.
Further, between the lower surface of tibial insert and the upper surface of tibia support, there is the first spacing distance.
Further, between the upper surface of interlayer and the bottom surface of the first groove, there is the second spacing distance.
Further, elastomeric element is spring or elastomeric pad.
Further, tibia support comprises support platform and the wing, and the wing is connected on the lower surface of support platform, connects projection and is arranged on the part upper surface of support platform, form the first spacing distance between the lower surface of tibial insert and the upper surface of support platform.
Apply technical scheme of the present invention, the connecting portion that rational height is adjustable between tibial insert and tibia support, and tibial insert and tibia support are arranged rotationally.The knee-joint prosthesis of such setting both had spring function, can realize again rotating, and reduced knee joint contact stress, thus decreased the wearing and tearing between joint, extend the life-span of prosthese.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the structural representation of the embodiment according to ankle prosthese of the present invention; And
Fig. 2 shows the profile of the embodiment according to ankle prosthese of the present invention.
Wherein, above-mentioned accompanying drawing comprises the following drawings labelling:
10, tibial insert; 11, the first groove; 20, tibia support; 21, support platform; 22, the wing; 30 connecting portions; 31, interlayer; 32, elastomeric element; 33, projection is connected; 34, the second groove.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, the invention provides a kind of knee joint, this knee joint comprises tibial insert 10, tibia support 20 and connecting portion 30.Particularly, tibia support 20 is arranged rotationally relative to tibial insert 10, and connecting portion 30 is adjustable for height to be arranged between tibial insert 10 and tibia support 20 to regulate the distance between tibial insert 10 and tibia support 20.
The present embodiment is the connecting portion that rational height is adjustable between tibial insert and tibia support, and tibial insert and tibia support is arranged rotationally.The knee-joint prosthesis of such setting both had spring function, can realize again rotating, and reduced knee joint contact stress, thus decreased the wearing and tearing between joint, extend the life-span of prosthese.Under knee joint loading condition, can realize pooling feature by connecting portion 30, the spring function of simulation natural meniscus, to improve the comfort level of patient experiences.
In the present embodiment, connecting portion 30 comprises interlayer 31, elastomeric element 32.Tibial insert 10 is connected with interlayer 31 rotationally, and elastomeric element 32 is arranged between interlayer 31 and tibia support 20 to regulate the distance between tibial insert 10 and tibia support 20.One interlayer 31 is set between connecting portion 30 and tibia support 20, tibial insert 10 can be made to realize rotating on tibia support 20.
In the present embodiment, interlayer 31 is embedded in the first groove 11 of the lower surface of tibial insert 10.In order to make interlayer 31 and tibial insert 10 keep good annexation, offering the first groove 11 in the lower surface of tibial insert 10, and interlayer 31 being embedded in the first groove 11, coming off to prevent interlayer 31.
In the present embodiment, between interlayer 31 and tibial insert 10, be formed with the stop configurations of backstop tibial insert 10 along the movement of interlayer 31 longitudinal direction, tibial insert 10 with interlayer 31 along short transverse synchronizing moving.In order to make tibial insert 10 with interlayer 31 along short transverse synchronizing moving, between interlayer 31 and tibial insert 10, be provided with the stop configurations of backstop tibial insert 10 along the movement of interlayer 31 longitudinal direction.
In the present embodiment, the cross section of interlayer 31 is circular and the external diameter of interlayer 31 from top to bottom successively decreases gradually, the cross section of the first groove 11 is circular and the diameter of the first groove 11 from top to bottom successively decreases gradually, and the external diameter of the lower surface of interlayer 31 is greater than the diameter of the opening part of the first groove 11 to form stop configurations.In order to make tibial insert 10 with interlayer 31 along short transverse synchronizing moving, interlayer 31 being arranged to cross section is circular interlayer, and the external diameter of interlayer 31 from top to bottom successively decreases gradually, the cross section of the first groove 11 is also circular and the diameter of the first groove 11 is also from top to bottom successively decrease gradually, and the external diameter of the lower surface of interlayer 31 is greater than the diameter of the opening part of the first groove 11 to form stop configurations.
According to another embodiment of the invention, connecting portion 30 comprises: connect projection 33, outstanding is arranged on the part upper surface of tibia support 20, connecting projection 33 is embedded in the second groove 34 of the lower surface of interlayer 31, elastomeric element 32 is arranged at interlayer 31 and is connected between projection 33 with the distance between the upper surface regulating interlayer 31 and tibia support 20, wherein, the cross section of connection projection 33 is circular and the diameter of connection projection 33 from top to bottom successively decreases gradually, the internal diameter of the second groove 34 from top to bottom successively decreases gradually, the diameter connecting the upper surface of projection 33 is greater than the diameter of the opening part of the second groove 34.In order to make tibia support 20 better be connected with connecting portion 30, arranging between tibia support 20 with connecting portion 30 and being connected projection 33, interlayer 31, and connection projection 33 is embedded in the second groove 34 of the lower surface of interlayer 31.In order to make whole knee joint have spring function, elastomeric element 32 is set between connection projection 33 and interlayer 31.
In the present embodiment, between the lower surface of tibial insert 10 and the upper surface of tibia support 20, there is the first spacing distance.This space provides guarantee to the displacement between tibial insert 10 and tibia support 20.In order to the Contact of the upper surface of the lower surface and tibia support 20 of avoiding tibial insert 10 further, preferably, the first spacing distance is more than or equal to the decrement of elastomeric element 32.
In the present embodiment, between the upper surface of interlayer 31 and the bottom surface of the first groove 11, there is the second spacing distance.This spacing distance ensure that between tibial insert 10 and interlayer 31 rotatable, avoids the first groove 11 in tibial insert 10 and interlayer 31 directly to fit increasing rubbing and affects and rotate.
Preferably, elastomeric element 32 is spring or elastomeric pad.
Tibia support 20 comprises support platform 21 and the wing 22, the wing 22 is connected on the lower surface of support platform 21, connecting projection 33 is arranged on the part upper surface of support platform 21, forms the first spacing distance between the lower surface of tibial insert 10 and the upper surface of support platform 21.The setting of general rotation tibial plateau arranges a hole inserting on the wing 22 in human body pulp cavity, a long column is designed at tibial insert 10 and support platform 21 contact surface, the interior realization of hole that this long column inserts support platform 21 rotates, the shortcoming of this design is, require that the hole of support platform 21 has certain diameter, this wing 22 just making tibia support 20 can be very thick, for the patient that short and small patient or child pulp cavity of etc.ing is thinner, use has certain restricted.The present embodiment arranges a circular connection projection 33 at tibia support 20 upper surface, the connection of tibial insert 10 and interlayer 31, interlayer 31 and tibia support 20 is realized by certain interference fit, both can realize rotating, also can reduce the diameter of the wing 22 of tibia support 20, make such knee-joint prosthesis be adapted to more patient.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
Apply technical scheme of the present invention, the connecting portion that rational height is adjustable between tibial insert and tibia support, and tibial insert and tibia support are arranged rotationally.The knee-joint prosthesis of such setting both had spring function, can realize again rotating, and reduced knee joint contact stress, thus decreased the wearing and tearing between joint, extend the life-span of prosthese.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a knee-joint prosthesis, is characterized in that, comprising:
Tibial insert (10);
Tibia support (20), is arranged rotationally relative to described tibial insert (10);
Connecting portion (30), is adjustable for heightly arranged between described tibial insert (10) and described tibia support (20) to regulate the distance between described tibial insert (10) and described tibia support (20).
2. knee-joint prosthesis according to claim 1, is characterized in that, described connecting portion (30) comprising:
Interlayer (31), described tibial insert (10) is connected with described interlayer (31) rotationally;
Elastomeric element (32), is arranged between described interlayer (31) and described tibia support (20) to regulate the distance between described tibial insert (10) and described tibia support (20).
3. knee-joint prosthesis according to claim 2, is characterized in that, described interlayer (31) is embedded in first groove (11) of the lower surface of described tibial insert (10).
4. knee-joint prosthesis according to claim 3, it is characterized in that, be formed with the stop configurations of tibial insert described in backstop (10) along described interlayer (31) longitudinal direction movement between described interlayer (31) and described tibial insert (10), described tibial insert (10) with described interlayer (31) along short transverse synchronizing moving.
5. knee-joint prosthesis according to claim 4, it is characterized in that, the cross section of described interlayer (31) is circular and the external diameter of described interlayer (31) from top to bottom successively decreases gradually, the cross section of described first groove (11) is circular and the diameter of described first groove (11) from top to bottom successively decreases gradually, and the external diameter of the lower surface of described interlayer (31) is greater than the diameter of the opening part of described first groove (11) to form described stop configurations.
6. knee-joint prosthesis according to claim 2, is characterized in that, described connecting portion (30) also comprises:
Connect projection (33), on the outstanding part upper surface being arranged at described tibia support (20), described connection projection (33) is embedded in second groove (34) of the lower surface of described interlayer (31), described elastomeric element (32) is arranged at described interlayer (31) and is connected between projection (33) with the distance between the upper surface regulating described interlayer (31) and described tibia support (20) with described, wherein, the cross section of described connection projection (33) is circular and the diameter of described connection projection (33) from top to bottom successively decreases gradually, the internal diameter of described second groove (34) from top to bottom successively decreases gradually, the diameter of the upper surface of described connection projection (33) is greater than the diameter of the opening part of described second groove (34).
7. knee-joint prosthesis according to claim 4, is characterized in that, has the first spacing distance between the lower surface of described tibial insert (10) and the upper surface of described tibia support (20).
8. knee-joint prosthesis according to claim 5, is characterized in that, has the second spacing distance between the upper surface of described interlayer (31) and the bottom surface of described first groove (11).
9. knee-joint prosthesis according to claim 2, is characterized in that, described elastomeric element (32) is spring or elastomeric pad.
10. knee-joint prosthesis according to claim 7, it is characterized in that, described tibia support (20) comprises support platform (21) and the wing (22), the described wing (22) is connected on the lower surface of described support platform (21), described connection projection (33) is arranged on the part upper surface of described support platform (21), forms described first spacing distance between the lower surface of described tibial insert (10) and the upper surface of described support platform (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510275614.5A CN104840279B (en) | 2015-05-26 | 2015-05-26 | Knee-joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510275614.5A CN104840279B (en) | 2015-05-26 | 2015-05-26 | Knee-joint prosthesis |
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| Publication Number | Publication Date |
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| CN104840279A true CN104840279A (en) | 2015-08-19 |
| CN104840279B CN104840279B (en) | 2017-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510275614.5A Active CN104840279B (en) | 2015-05-26 | 2015-05-26 | Knee-joint prosthesis |
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| CN (1) | CN104840279B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107174378A (en) * | 2017-05-19 | 2017-09-19 | 华南理工大学 | One kind rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure and implementation method |
| CN107198597A (en) * | 2016-03-18 | 2017-09-26 | 重庆润泽医药有限公司 | A kind of tibia support implant |
| CN109567987A (en) * | 2019-02-01 | 2019-04-05 | 北京爱康宜诚医疗器材有限公司 | Single condyle knee-joint prosthesis |
| CN110680568A (en) * | 2019-10-21 | 2020-01-14 | 北京安颂科技有限公司 | Artificial tibia prosthesis and artificial knee joint |
| CN111772888A (en) * | 2020-08-17 | 2020-10-16 | 北京爱康宜诚医疗器材有限公司 | Tibial plateau |
| CN113995559A (en) * | 2020-09-15 | 2022-02-01 | 北京力达康科技有限公司 | Single condyle knee joint prosthesis |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107198597A (en) * | 2016-03-18 | 2017-09-26 | 重庆润泽医药有限公司 | A kind of tibia support implant |
| CN107174378A (en) * | 2017-05-19 | 2017-09-19 | 华南理工大学 | One kind rotation clamping type Total knee arthroplasty tibia support and tibial insert assembling structure and implementation method |
| CN107174378B (en) * | 2017-05-19 | 2023-04-21 | 华南理工大学 | Rotary clamping type full knee replacement tibia support and tibia gasket assembly structure and implementation method |
| CN109567987A (en) * | 2019-02-01 | 2019-04-05 | 北京爱康宜诚医疗器材有限公司 | Single condyle knee-joint prosthesis |
| CN110680568A (en) * | 2019-10-21 | 2020-01-14 | 北京安颂科技有限公司 | Artificial tibia prosthesis and artificial knee joint |
| CN111772888A (en) * | 2020-08-17 | 2020-10-16 | 北京爱康宜诚医疗器材有限公司 | Tibial plateau |
| CN113995559A (en) * | 2020-09-15 | 2022-02-01 | 北京力达康科技有限公司 | Single condyle knee joint prosthesis |
| CN113995559B (en) * | 2020-09-15 | 2022-12-06 | 北京力达康科技有限公司 | Single condyle knee joint prosthesis |
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| CN104840279B (en) | 2017-08-01 |
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Address after: 102200 Beijing science and Technology Park of Changping District Bai Fu Road 10 Patentee after: Beijing Aikang Yicheng Medical Equipment Co., Ltd. Address before: 102200 Beijing science and Technology Park of Changping District Bai Fu Road 10 Patentee before: Beijing AKEC Medical Co.,Ltd. |