CN104622605A - Single-condylar knee joint prosthesis - Google Patents
Single-condylar knee joint prosthesis Download PDFInfo
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- CN104622605A CN104622605A CN201510093268.9A CN201510093268A CN104622605A CN 104622605 A CN104622605 A CN 104622605A CN 201510093268 A CN201510093268 A CN 201510093268A CN 104622605 A CN104622605 A CN 104622605A
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Abstract
The invention discloses a single-condylar knee joint prosthesis which comprises a femoral condyle (20), a platform mat (30) and a platform support (40). The platform mat (30) is arranged between the platform support (40) and the femoral condyle (20), the platform mat (30) is provided with an upper end face (31) and a lower end face (32), the upper end face (31) of the platform mat (30) is in contact with a lower end face (21) of the femoral condyle (20), the lower end face (32) of the platform mat (30) is in contact with an upper end face (41) of the platform support (40), both the lower end face (32) of the platform mat (30) and the upper end face (41) of the platform support (40) are planes, and the platform mat (30) can slide freely on the platform support (40). The single-condylar knee joint prosthesis conforms to superior knee joint dynamics, a femoral prosthesis and the platform mat in the single-condylar knee joint prosthesis are well matched in a geometrical shape, abnormal movement is obviously reduced, and more excellent knee joint dynamics is achieved.
Description
Technical field
The present invention relates to a kind of artificial knee joint prosthesis, particularly relate to a kind of single condyle knee-joint prosthesis.
Background technology
Knee-joint prosthesis is used to replace kneed surgical implant, for knee joint surface knee replacement surgery.As shown in Figure 1, the structure of existing knee-joint prosthesis mainly press-fit, be made up of condyle of femur 11, platform pad 12 and platform holder 13, wherein, the material of condyle of femur 11, platform holder 13 is vitallium, and the material of platform pad 12 is ultra-high molecular weight polyethylene; Platform holder 13 is sealed for being press-fitted with platform pad 12, and platform pad 12 front portion is provided with translot, is convenient to the locked portions when platform holder 13 is installed with platform pad 12 and bounces back.
Though the alternative knee joint femoral of above-mentioned existing knee joint and tibia part articular surface, really there is progressive, but but find when reality uses also to have some shortcomings in its structure, cause this knee joint to fail to reach best result of use in practical application, its shortcoming is summarized as follows:
(1) much research shows, all there is improper motion of knee joint pattern in various fixed platform knee prosthesis, after the total knee replacement that the low shape of posterior cruciate ligament conservative is right, after tibiofemoral contact position is positioned at normal position when knee joint is stretched, then forwards move when flexing, the femur of this contradiction depends primarily on the geometric shape of prosthese and the tension force of ligament relative to the activity of tibia, and this abnormal activity can cause the Rapid Damage of polyethylene liner;
(2) need when platform pad and platform holder are installed just can be in place by very large thrust, by the conduction of power, the bone cement between platform holder and tibia cross section may be made to produce gap, and in life-time service, there is loosening danger in platform holder and tibia cross section afterwards.
Summary of the invention
The object of the present invention is to provide a kind of structure simple, easy for installation, and single condyle knee-joint prosthesis of good stability.
For achieving the above object, the concrete technical scheme of single condyle knee-joint prosthesis of the present invention is as follows:
A kind of single condyle knee-joint prosthesis, comprise condyle of femur, platform pad and platform holder, platform pad is arranged between platform holder and condyle of femur, platform spacer has upper surface and lower surface, the upper surface of platform pad contacts with the lower surface of condyle of femur, the lower surface of platform pad contacts with the upper surface of platform holder, and the lower surface of platform pad and the upper surface of platform holder are plane, and platform pad can be free to slide in platform holder.
Single condyle knee-joint prosthesis of the present invention has the following advantages:
(1) under single condyle joint replacement surgery, knee joint can better copy normal motor pattern: after single condyle replacement, tibiofemoral contact point is just around tibia sour jujube place or its, during knee joint flexion-extension motion, the stability of condylus medialis femoris is close to Normal Knee, and when knee sprung, the medial condyle of femur rearward moves, even if the complete flexing of this position knee joint also can not change, such kinesiology is stable and very normally close.
(2) condyle of femur and the contact surface place of platform pad can have that good shape is right to be coordinated, femur-tibial prosthesis mask is made to have matched, thus reduce the wearing and tearing of single condyle knee joint surface, and range of motion also can not be made to be restricted, because the lower surface of platform pad can be freely movable, the active force that bears of knee joint is at the dorsal surface of platform pad, and it is minimum to poly stress, so can solve the problem of platform acting as a cushion flank wear preferably.In addition, rotation platform is paid somebody's debt and expected repayment later and the multidirectional wearing and tearing between articular surface can be transformed into one-way abrasion, is also conducive to extending poly service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing knee-joint prosthesis;
Fig. 2 is the structural representation of single condyle knee-joint prosthesis of the present invention;
Fig. 3 is the structural representation of the condyle of femur in Fig. 2;
Fig. 4 is the structural representation of the platform pad in Fig. 2;
Fig. 5 is the structural representation of the platform holder in Fig. 2.
Detailed description of the invention
In order to better understand object of the present invention, structure and function, below in conjunction with accompanying drawing, further detailed description is done to the single condyle knee-joint prosthesis of one of the present invention.
As shown in Figures 2 to 5, single condyle knee-joint prosthesis of the present invention comprises condyle of femur 20, platform pad 30 and platform holder 40, platform pad 30 is arranged between platform holder 40 and condyle of femur 20, wherein, platform pad 30 has upper surface 31 and lower surface 32, the upper surface 31 of platform pad 30 contacts with the lower surface 32 of condyle of femur 20, the lower surface 32 of platform pad 30 contacts with the upper surface 41 of platform holder 40, the lower surface 32 of platform pad 30 is plane with the upper surface 41 of platform holder 40, can be free to slide in platform holder 40 to make platform pad 30, meet normal human body natural's motion of knee joint process.In addition, the condyle of femur 20 in the present invention and platform holder 40 preferably use the manufacture of vitallium material, and platform pad 30 preferably uses superhigh molecular weight polyethylene material manufacture.
Further, the upper surface 31 of platform pad 30 is concave curvatures, the lower surface 21 of condyle of femur 20 is the concave curvatures matched with the concave curvatures on platform pad 30, convex surface on condyle of femur 20 contacts with the concave curvatures on platform pad 30, the mechanical stress of single condyle knee joint surface of the present invention can be made to be distributed on larger area, reduce contact stress, avoid excessive wear platform pad 30.
Further, one end of the upper surface 41 of platform holder 40 has upwards extended to form platform pad backup plate 42, the upper surface 41 that platform pad 30 is placed on platform holder 40, against living platform pad backup plate 34, can be free to slide in platform holder 40 along platform pad backup plate 34 to make platform pad 30.
Thus, condyle of femur 20 in the present invention and the contact surface place of platform pad 30 can have that good shape is right to be coordinated, femur-tibial prosthesis mask is made to have matched, thus reduce the wearing and tearing of single condyle knee joint surface, and range of motion also can not be made to be restricted, and because the lower surface 32 of platform pad 30 can be freely movable, the active force that bears of knee joint is at the dorsal surface of platform pad 30, it is minimum to poly stress, so can solve the problem of platform acting as a cushion flank wear preferably.
Under single condyle joint replacement surgery, knee joint can better copy normal motor pattern, after single condyle replacement, tibiofemoral contact point is just around tibia sour jujube place or its, and during knee joint flexion-extension motion, the stability of condylus medialis femoris is close to Normal Knee, when knee sprung, the medial condyle of femur rearward moves, even if the complete flexing of this position knee joint also can not change, such kinesiology is stable and close to normal.
Further, one end of the lower surface 32 of platform holder 40 has extended to form facade plate 43 downwards, facade plate 43 has at least one circular hole 44, it should be noted, in the present invention, facade plate 43 has multiple circular hole 44, circular hole 44 preferred arrangement is in alignment, and is parallel to the upper surface 41 of platform holder 40.
Single condyle knee-joint prosthesis of the present invention has superior knee joint kinetics, because in knee joint single condyle prosthese, femoral prosthesis peace cushion has good geometric match, thus considerably reduces abnormal movement, makes it have more superior knee joint kinetics.
Further describe invention has been by specific embodiment above; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; one of ordinary skilled in the art to the various amendments that above-described embodiment is made, belongs to the scope that the present invention protects after reading this specification.
Claims (5)
1. a single condyle knee-joint prosthesis, comprise condyle of femur (20), platform pad (30) and platform holder (40), platform pad (30) is arranged between platform holder (40) and condyle of femur (20), it is characterized in that, platform pad (30) has upper surface (31) and lower surface (32), the upper surface (31) of platform pad (30) contacts with the lower surface (21) of condyle of femur (20), the lower surface (32) of platform pad (30) contacts with the upper surface (41) of platform holder (40), the lower surface (32) of platform pad (30) and the upper surface (41) of platform holder (40) are plane, platform pad (30) can be free to slide in platform holder (40).
2. single condyle knee-joint prosthesis according to claim 1, it is characterized in that, the upper surface (31) of platform pad (30) is concave curvatures, the lower surface (21) of condyle of femur (20) is the convex surface matched with the concave curvatures on platform pad (30), and the convex surface on condyle of femur (20) contacts with the concave curvatures on platform pad (30).
3. single condyle knee-joint prosthesis according to claim 1, it is characterized in that, one end of the upper surface (41) of platform holder (40) has upwards extended to form platform pad backup plate (42), and it is upper and against living platform pad backup plate (34) that platform pad (30) is placed on the upper surface (41) of platform holder (40).
4. single condyle knee-joint prosthesis according to claim 3, it is characterized in that, one end of the lower surface (32) of platform holder (40) has extended to form facade plate (43) downwards, facade plate (43) has at least one circular hole (44).
5. single condyle knee-joint prosthesis according to claim 1, is characterized in that, condyle of femur (20) and platform holder (40) are vitallium material, and platform pad (30) is superhigh molecular weight polyethylene material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510093268.9A CN104622605A (en) | 2015-03-02 | 2015-03-02 | Single-condylar knee joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510093268.9A CN104622605A (en) | 2015-03-02 | 2015-03-02 | Single-condylar knee joint prosthesis |
Publications (1)
| Publication Number | Publication Date |
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| CN104622605A true CN104622605A (en) | 2015-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510093268.9A Pending CN104622605A (en) | 2015-03-02 | 2015-03-02 | Single-condylar knee joint prosthesis |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789099A (en) * | 2016-08-31 | 2018-03-13 | 嘉思特华剑医疗器材(天津)有限公司 | Retain bone amount simple joint displacement knee-joint prosthesis |
| CN108392297A (en) * | 2018-04-10 | 2018-08-14 | 北京市春立正达医疗器械股份有限公司 | Single condyle knee-joint prosthesis |
| CN108926411A (en) * | 2018-07-25 | 2018-12-04 | 嘉思特华剑医疗器材(天津)有限公司 | Fixed platform type separate room knee-joint prosthesis and tibial plateau prosthetic designs method |
| WO2019007287A1 (en) * | 2017-07-03 | 2019-01-10 | 朱红文 | Hemi-condyle type artificial knee joint |
| CN109620480A (en) * | 2019-01-31 | 2019-04-16 | 苏州微创关节医疗科技有限公司 | Single condyle femoral prosthesis and shin bone liner |
| CN109620478A (en) * | 2019-02-02 | 2019-04-16 | 优适医疗科技（苏州）有限公司 | Knee joint single condyle component and the single condyle articular system for applying it |
| CN109966030A (en) * | 2019-03-08 | 2019-07-05 | 山东新华联合骨科器材股份有限公司 | Single condyle artificial knee joint prosthesis system based on 3D printing |
| CN110786969A (en) * | 2019-10-28 | 2020-02-14 | 北京市春立正达医疗器械股份有限公司 | Tibial plateau holds in palm and uses its unicondylar knee joint prosthesis |
| CN112674913A (en) * | 2021-01-14 | 2021-04-20 | 福州大学 | Unicondylar knee joint prosthesis capable of preventing looseness and working method thereof |
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| US6299645B1 (en) * | 1999-07-23 | 2001-10-09 | William S. Ogden | Dove tail total knee replacement unicompartmental |
| CN102271625A (en) * | 2009-01-28 | 2011-12-07 | 捷迈公司 | Lateral condyle with posteriorly located inflection point for total knee implant |
| CN103517690A (en) * | 2010-09-10 | 2014-01-15 | 巴奥米特Uk有限公司 | Femoral extension prosthetic component and tibial shelf prosthetic component for unicondylar meniscal bearing knee prosthesis and prosthesis including such a component |
| CN103596523A (en) * | 2010-03-11 | 2014-02-19 | 巴奥米特Uk有限公司 | Tibial prosthetic component for a partial or unicondylar bearing knee replacement, method of selecting such a tibial prosthetic component, method of implanting such a tibial prosthetic component and a kit for a surgeon |
| CN104068948A (en) * | 2014-07-18 | 2014-10-01 | 山东威高骨科材料有限公司 | Single-condylus prosthesis |
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2015
- 2015-03-02 CN CN201510093268.9A patent/CN104622605A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6299645B1 (en) * | 1999-07-23 | 2001-10-09 | William S. Ogden | Dove tail total knee replacement unicompartmental |
| CN102271625A (en) * | 2009-01-28 | 2011-12-07 | 捷迈公司 | Lateral condyle with posteriorly located inflection point for total knee implant |
| CN103596523A (en) * | 2010-03-11 | 2014-02-19 | 巴奥米特Uk有限公司 | Tibial prosthetic component for a partial or unicondylar bearing knee replacement, method of selecting such a tibial prosthetic component, method of implanting such a tibial prosthetic component and a kit for a surgeon |
| CN103517690A (en) * | 2010-09-10 | 2014-01-15 | 巴奥米特Uk有限公司 | Femoral extension prosthetic component and tibial shelf prosthetic component for unicondylar meniscal bearing knee prosthesis and prosthesis including such a component |
| CN104068948A (en) * | 2014-07-18 | 2014-10-01 | 山东威高骨科材料有限公司 | Single-condylus prosthesis |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789099A (en) * | 2016-08-31 | 2018-03-13 | 嘉思特华剑医疗器材(天津)有限公司 | Retain bone amount simple joint displacement knee-joint prosthesis |
| WO2019007287A1 (en) * | 2017-07-03 | 2019-01-10 | 朱红文 | Hemi-condyle type artificial knee joint |
| CN108392297A (en) * | 2018-04-10 | 2018-08-14 | 北京市春立正达医疗器械股份有限公司 | Single condyle knee-joint prosthesis |
| CN108926411A (en) * | 2018-07-25 | 2018-12-04 | 嘉思特华剑医疗器材(天津)有限公司 | Fixed platform type separate room knee-joint prosthesis and tibial plateau prosthetic designs method |
| CN109620480A (en) * | 2019-01-31 | 2019-04-16 | 苏州微创关节医疗科技有限公司 | Single condyle femoral prosthesis and shin bone liner |
| CN109620478A (en) * | 2019-02-02 | 2019-04-16 | 优适医疗科技（苏州）有限公司 | Knee joint single condyle component and the single condyle articular system for applying it |
| CN109966030A (en) * | 2019-03-08 | 2019-07-05 | 山东新华联合骨科器材股份有限公司 | Single condyle artificial knee joint prosthesis system based on 3D printing |
| CN110786969A (en) * | 2019-10-28 | 2020-02-14 | 北京市春立正达医疗器械股份有限公司 | Tibial plateau holds in palm and uses its unicondylar knee joint prosthesis |
| CN112674913A (en) * | 2021-01-14 | 2021-04-20 | 福州大学 | Unicondylar knee joint prosthesis capable of preventing looseness and working method thereof |
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Application publication date: 20150520 |