JP3667909B2 - Artificial knee joint - Google Patents

Artificial knee joint Download PDF

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Publication number
JP3667909B2
JP3667909B2 JP32052496A JP32052496A JP3667909B2 JP 3667909 B2 JP3667909 B2 JP 3667909B2 JP 32052496 A JP32052496 A JP 32052496A JP 32052496 A JP32052496 A JP 32052496A JP 3667909 B2 JP3667909 B2 JP 3667909B2
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sliding surface
concave
convex
main
sub
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JPH10155824A (en
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博一 網野
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京セラ株式会社
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/38Joints for elbows or knees
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof

Description

【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、慢性関節リウマチ、変形性膝関節症などによる高度に変形した膝関節或いは交通事故、災害等により、破壊された関節を正常な機能に回復させるために用いる人工膝関節に関するものである。 The present invention is rheumatoid arthritis, osteoarthritis, such as by highly deformed knee or traffic accident, due to a disaster or the like, to a knee prosthesis used to restore the destroyed joints normal function .
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
従来より、疾患や事故により破壊された膝関節の大腿骨の遠位部と近位部の骨切りを行い大腿骨の遠位部と脛骨の近位部の骨切りを行い大腿骨部材と脛骨部材をそれぞれ挿入固定する人工膝関節置換術が行われており、両部材を共通のピン部材で回動自在に係止したヒンジ型のものや、脛骨部材の摺動面上で、大腿骨部材が回動することにより、屈曲可能となるような構造の表面摺動型のものなどが用いられてきた。 Conventionally, the femoral member and the tibial perform osteotomy of the proximal portion of the distal portion of the femur and the tibia perform osteotomy of the distal portion and a proximal portion of the femur of a knee joint that has been destroyed by disease or accident members are total knee replacement surgery to insert fixing each perform those of the hinge type and which engage rotatably both members by a common pin member on the sliding surface of the tibial component, a femoral member There by turning, such as those of the surface sliding type structure so as to allow bending have been used.
【0003】 [0003]
【従来技術の課題】 [Problem of the prior art]
しかし、上記従来技術には以下のような問題点があった。 However, the above conventional art has the following problems.
【0004】 [0004]
すなわち、ヒンジ型の人工膝関節は回動支点が固定されるので可動域が小さく、また人の正常な関節運動を再現したものでなかったので、不自由なものであった。 That is, a hinged knee prosthesis has a small range of motion because rotation fulcrum is fixed, and since not obtained by reproducing the normal articulation of the human, were those inconvenient. これに対して、表面摺動型のものは、より正常な関節運動を再現したものであったが、大腿骨側の摺動面を金属で構成し、他方の脛骨部材の摺動面を高密度ポリエチレンで構成したものであったので、摺動特性に問題があり、高密度ポリエチレンの摩耗粉が経年のうちに蓄積していき、生体の細胞に異物反応を起こさせるなどして悪影響を与えることがあった。 In contrast, those of the surface sliding type, but were those reproduced more normal articulation, the sliding surface of the femoral side of a metal, high sliding surface of the other of the tibial component since were those composed density polyethylene, there is a problem with the sliding characteristics, will accumulate within the secular abrasion powder of high density polyethylene, an adverse effect by such cause a foreign body reaction to the living cells was there.
【0005】 [0005]
【課題を解決するための手段】 In order to solve the problems]
上記従来技術の課題を解決するため本発明の人工膝関節は、 大腿骨に固定される大腿骨部材と脛骨に固定される脛骨部材から成り且つ摺動面をセラミック材で構成した人工膝関節において、上記大腿骨部材の裏底側左右に球面状をした主凸状摺動面を形成し、他方の脛骨部材の左右側に球面状をした主凹状摺動面を形成し、伸展時には、これら凸、凹状の主摺動面が互いに嵌合し回動するように成すとともに、上記大腿骨部材の後部中央摺動部に球面状をした副凸状摺動面を形成し、他方の脛骨部材の後部中央摺動部に球面状をした副凹状摺動面を形成し、屈曲時には、これら凸、凹状の副摺動面が互いに嵌合し回動するように構成してなり、且つ、前記凸、凹状の主摺動面および前記凸、凹状の副摺動面の真円度が±1μm以内であるととも The prior art knee prosthesis of the present invention to solve the problems of, in the artificial knee joint constitute and sliding surface consists of a tibial member fixed to the femoral member and the tibial fixed to the femur with a ceramic material , to form a main convex sliding surface that is a spherical back bottom left and right of the femoral component, to form a main concave sliding surface which is a spherical to the left and right side of the other of the tibial member, at the time of extension, these convex, with forming as the main sliding surface of the concave is fitted to turn relative to each other to form a secondary convex sliding surface that is a spherical to the rear center sliding portion of the femoral component, the other of the tibial member the rear center sliding portion to form a secondary concave sliding surface which is a spherical shape, when bending is made configured so that these convex and concave sub sliding surface fitted to turn relative to each other, and wherein convex, concave main sliding surface and the convex, the roundness of the concave sub-sliding surface is within ± 1 [mu] m with に、前記主凸状摺動面と前記主凹状摺動面とのクリアランスおよび前記副凸状摺動面と前記副凹状摺動面とのクリアランスを7〜10μm以下とする。 To, or less 7~10μm the clearance between the clearance and the auxiliary convex sliding surface and the sub concave sliding surface of said main concave sliding surface and the main convex sliding surface.
【0006】 [0006]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
以下、図によって本発明の実施形態を説明する。 Hereinafter, an embodiment of the present invention by FIG.
図1は、本発明に係る人工膝関節を構成するセラミック製の大腿骨部材1の斜視図を示す。 Figure 1 shows a perspective view of a ceramic femoral member 1 constituting the artificial knee joint according to the present invention. 大腿骨部材1は、左右の裏底側に球面状をした主凸状摺動面2,2が形成されるとともに、後部中央摺動部上に球面状をした副凸状摺動面3が形成されている。 The femoral member 1, together with the main convex sliding surface 2, 2 in which the spherical back bottom side of the left and right are formed, the sub-convex sliding surface 3 in which the spherical on the rear center sliding portion It is formed. なお、大腿骨部材1の骨と当接する表側面12のうち、前顆壁部位などにセラミック小粒を凝集固着してなり且つリン酸カルシウム材料を表面コートした多孔質部13を形成して骨の増殖、侵入を誘生することにより骨との固着力を補強したり、或いは、表底部位に一対のスパイク14、14を形成して揺動や脱落を防止しても良い。 Of the front surface 12 in contact with the bone equivalent femoral component 1, prior to such a 顆壁 site will be a ceramic particle aggregate fixed and the calcium phosphate material to form a porous portion 13 that is the surface coating of bone growth, or to reinforce the adhesive force between the bone by 誘生 intrusion, or may prevent rocking or falling off to form a pair of spikes 14, 14 in the outsole site.
【0007】 [0007]
次に図2は、上記大腿骨部材1とともに膝関節を構成する脛骨部材4の斜視図を示し、また図3は図2のA−A線断面図を示し、この脛骨部材4の左右側に球面状をした主凹状摺動面5,5が形成されるとともに、後部中央摺動部上に球面状をした副凹状摺動面6が形成されている。 Next, FIG. 2, together with the femoral component 1 shows a perspective view of the tibial component 4 forming the knee joint, and FIG. 3 shows the A-A line sectional view of FIG. 2, the left and right side of the tibial component 4 together with the main concave sliding surface 5 and 5 in which the spherical shape is formed, the sub concave sliding surface 6 is formed with a spherical shape on rear center sliding portion. なお、脛骨部材4の摺動面5、6は前記大腿骨部材1と摺動するためにセラミック製であり、さらに、この摺動面5、6を保持する金属製のトレー7の内底面8と摺動面5、6との間に、衝撃緩衝のため高密度ポリエチレンなどの合成樹脂等で形成された中間部材9が嵌挿してある。 Incidentally, the sliding surface 5, 6 of the tibial component 4 is ceramic in order to slide said femoral component 1, further inner bottom surface of the metallic tray 7 for holding the sliding surface 5, 6 8 and between the sliding surfaces 5,6, the intermediate member 9 formed of a synthetic resin or the like, such as high density polyethylene for the impact cushioning are fitted. また、トレー7の下側には脛骨髄腔内に嵌挿するステム15が上記トレー7と一体的に形成されている。 Further, the lower side of the tray 7 interpolating stem 15 fitted to the tibial bone marrow cavity is formed integrally with the tray 7.
【0008】 [0008]
上記大腿骨部材1と脛骨部材4をそれぞれ大腿骨10と脛骨11に装着し伸展位にした状態を図4に示し、この状態では、超高真円度と同一球半径を有する大腿骨部材1の主凸状摺動面2,2と脛骨部材4の主凹状摺動面5,5とが滑らかに摺動する。 A state in which the extended position the femoral component 1 and tibial component 4 each attached to the femur 10 and the tibia 11 shown in Figure 4, in this state, the femoral component 1 having a super high roundness same sphere radius of the main concave sliding surface 5,5 of the main convex sliding surface 2, 2 and the tibial member 4 is smoothly slide. また、この伸展位から屈曲した場合に図5乃至図6に示すように大腿骨部材1の副凸状摺動面3が脛骨部材4の副凹状摺動面6の中に嵌合されるごとく収容されるため、前方へ移動することなく脛骨部材4の後部での屈曲運動が可能となり、正座可能な可動角度135°以上までにも可動域を向上させるこができ、且つ、超高真円度と同一球半径を有する大腿骨部材1の副凸状摺動面3と脛骨部材4の副凹状摺動面6とが滑らかに摺動する。 Moreover, as the sub-convex sliding surface 3 of the femoral component 1 as shown in FIGS. 5-6 are fitted into the sub concave sliding surface 6 of the tibial component 4 when bent from the extended position to be accommodated, it is possible to bending movement of the rear of the tibial member 4 without moving forward, can also this to improve the range of motion up to sit a movable angle 135 ° or more, and ultra-high circularity degrees and the sub concave sliding surface 6 of the sub-convex sliding surface 3 and the tibial member 4 of the femoral component 1 having the same sphere radius smoothly slide.
【0009】 [0009]
一般に、高密度ポリエチレンや金属製の摺動面の問題点としては、摺動特性が優れているとは言えず、摩耗粉が発生し易く、生体内組織に取り込まれた異物である摩耗粉が生体に悪影響を与えることがある。 Generally, the problem of the sliding surface of the high-density polyethylene or metal, it can not be said sliding characteristics are excellent, easy to wear debris generated, abrasion powder is foreign material incorporated into in vivo tissue is it may adversely affect the living body. これに対して、上述のように構成される本実施形態の人工膝関節は、大腿骨部材1と脛骨部材4の摺動面2,3,5,6を摺動特性に優れるセラミック材料で構成したことにより、また、それのみでなく、大腿骨部材1の主凸状摺動面2と脛骨部材4の主凹状摺動面5が超高真円度と同一球半径を有し、また、大腿骨部材1の副凸状摺動面3と脛骨部材4の副凹状摺動面6が超高真円度と同一球半径を有するよう構成したことにより、理想的な摺動特性が得られ、摩耗粉がほとんど発生しない。 In contrast, the artificial knee joint of the present embodiment configured as described above, composed of a ceramic material having excellent sliding surfaces 2, 3, 5, 6 of the femoral component 1 and tibial component 4 on the sliding characteristics by the, also, it not only, the main concave sliding surface 5 of the main convex sliding surface 2 and the tibial member 4 of the femoral component 1 has an ultra-high roundness same sphere radius, also, by sub concave sliding surface 6 of the sub-convex sliding surface 3 and the tibial member 4 of the femoral component 1 is configured to have a super high roundness same sphere radius, the ideal sliding characteristics are obtained , do not wear powder is almost occur.
【0010】 [0010]
前述のような大腿骨部材1と脛骨部材4の摺動面6を構成するセラミック材料としては、アルミナ、ジルコニア、炭化ケイ素、窒化ケイ素などの高強度材料を用い、このうち、アルミナが摺動性において特に優れている。 As the ceramic material constituting the femoral member 1 and the sliding surface 6 of the tibial component 4 as described above, alumina, zirconia, silicon carbide, using a high strength material such as silicon nitride, of which the sliding resistance alumina It is particularly excellent in. また、このような材料による摺動表面は、可能な限り滑らかな方がよいが、少なくとも平均面粗度Ra≦0.02μm であることが好ましい。 Further, the sliding surface by such materials, but it is smooth ones as possible, preferably at least the average surface roughness Ra ≦ 0.02 [mu] m. この平均面粗度Raが0.02μm より大きい場合には、摺動性が低下し、表面からセラミック粒子が脱落し易くなる恐れがある。 If this average surface roughness Ra is larger than 0.02μm, the reduced sliding resistance, there is a possibility that the ceramic particles are likely to fall off from the surface. また、各前記主凸状摺動面2,2、主凹状摺動面5,5、副凸状摺動面3、副凹状摺動面6の真円度(spherical deviation)としては、±1μm 以内、主凸状摺動面2,2と主凹状摺動面5,5および副凸状摺動面3と副凹状摺動面6とのクリアランスとしては7〜10μm 以下であることは好ましい。 Moreover, each of said main convex sliding surface 2, 2, the main concave sliding surface 5,5, sub convex sliding surface 3, as the circularity of the sub concave sliding surface 6 (spherical deviation) is, ± 1 [mu] m within, it is preferred as a clearance between the main convex sliding surface 2, 2 a main concave sliding surface 5,5 and Fukutotsu shaped sliding surface 3 and the sub concave sliding surface 6 or less 7~10Myuemu. これら数値範囲外の場合、摺動特性が低下し、表面からセラミック粒子が脱落し易くなる恐れがあるためである。 If outside these numerical ranges, and reduced sliding properties, the ceramic particles from the surface there is a possibility that easily fall off. さらに、前記主凸状摺動面2,2、主凹状摺動面5,5の球半径R 1 (図4参照)としては、R 1 =10〜20mm、び副凸状摺動面3と副凹状摺動面6の球半径R 2 (図5参照)としては、R 2 =5〜15mmの範囲が好ましい。 Further, the main convex sliding surface 2 and 2, the spherical radius R 1 of the main concave sliding surface 5,5 (see FIG. 4), R 1 = 10 to 20 mm, a fine Fukutotsu shaped sliding face 3 the sphere radius R 2 of the sub concave sliding surface 6 (see FIG. 5), the range of R 2 = 5 to 15 mm are preferred. これは、これらの数値範囲外の場合、人体の動きに対して人工膝関節の動きが適当に追従せず、部材の脱臼等の恐れがある。 This is the case outside of these range, the movement of the knee joint is not properly follow the body motion, there is a risk of dislocation of the members.
【0011】 [0011]
また、前記脛骨部材4のトレー7およびステム15は、ステンレス鋼、コバルト・クロム合金、チタン、チタン合金などの金属のみでなく、その他、カーボンファイバ、合成樹脂やカーボンファイバを集束させて所定の太さにした材料で形成されており、さらにこれらの材料の骨との当接面にはアルミナ、アパタイト、酸化チタン、窒化チタンなどをコーティングしたものであっても良い。 Further, the tray 7 and the stem 15 of the tibial member 4, stainless steel, cobalt chrome alloys, titanium, not only metals such as titanium alloys, other carbon fibers, synthetic resin and focuses the carbon fiber of a particular thickness material is formed by you, yet alumina the contact surface with the bone of these materials, apatite, titanium oxide, or may be coated with titanium nitride.
【0012】 [0012]
以上、本発明の実施形態を詳細に説明したが、本発明は本実施形態に限定されるものではなく、発明の目的を逸脱しない限り任意の形態とすることができることは言うまでもない。 Having described the embodiments of the present invention in detail, the present invention is not limited to the present embodiment, it goes without saying that can be in any form without departing from the object of the invention.
【0013】 [0013]
【発明の効果】 【Effect of the invention】
叙上のように、本発明の人工膝関節は、摺動面を高強度セラミック材で構成したものであり、さらに、大腿骨部材の裏底側左右に球面状をした主凸状摺動面を形成し、他方の脛骨部材の左右側に球面状をした主凹状摺動面を形成し、伸展時には、これら凸、凹摺動面が嵌合し回動するように成すとともに、上記大腿骨部材の後部中央摺動部に球面状をした副凸状摺動面を形成し、他方の脛骨部材の後部中央摺動部に球面状をした副凹状摺動面を形成し、屈曲時には、これら凸、凹摺動面が嵌合し回動するように成したもの、すなわち、伸展時も屈曲時もセラミック材の且つ球面状をした凸、凹摺動面により摺動するので、摺動特性に優れ、摩耗粉がほとんど発生しない。 As on ordination, the artificial knee joint of the present invention has constructed a sliding surface with a high strength ceramic material, further, the main convex sliding surface in which the spherical back bottom left and right of the femoral component to form a to form a main concave sliding surface which is a spherical to the left and right side of the other of the tibial member, at the time of extension, these projections, together with the form as 凹摺 dynamic surface is fitted pivoted, the femur forming a secondary convex sliding surface that is a spherical to the rear center sliding portion of the member to form a sub concave sliding surface which is a spherical to the rear center sliding portion of the other of the tibial member, when bent, they convex, that form to engage pivot fitting is 凹摺 dynamic surface, i.e., and convex with a spherical extension at even flexion also ceramic materials, since the sliding by 凹摺 dynamic surface, the sliding characteristics excellent, not wear powder is almost occur. 特に、 前記凸、凹状の主摺動面および前記凸、凹状の副摺動面の真円度が±1μm以内であるとともに、前記主凸状摺動面と前記主凹状摺動面とのクリアランスおよび前記副凸状摺動面と前記副凹状摺動面とのクリアランスを7〜10μm以下とし、超高真円度と同一半径を有するよう構成したことにより理想的な摺動特性が得られ、摩耗粉がほとんど発生しない。 In particular, the convex, concave main sliding surface and the convex, with the roundness of the concave sub-sliding surface is within ± 1 [mu] m, the clearance between the main concave sliding surface and the main convex sliding surface and wherein the clearance between the sub-convex sliding surface and the sub concave sliding surface and less 7~10Myuemu, ideal sliding properties by constructing so as to have a ultra-high roundness and the same radius is obtained, abrasion powder hardly occurs.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明の人工膝関節を構成する大腿骨部材の斜視図である。 1 is a perspective view of a femoral component which constitutes the artificial knee joint of the present invention.
【図2】本発明の人工膝関節を構成する脛骨部材の斜視図である。 2 is a perspective view of a tibial component constituting the artificial knee joint of the present invention.
【図3】図2のA−A線断面図である。 3 is a sectional view along line A-A of FIG.
【図4】本発明の人工膝関節を大腿骨と脛骨に装着し伸展した状態を示す要部断面図である。 The artificial knee joint of the present invention; FIG is a fragmentary cross-sectional view showing a state where the extended and attached to the femur and tibia.
【図5】本発明の人工膝関節を大腿骨と脛骨に装着し屈曲した状態を示す要部断面図である。 5 is a fragmentary cross-sectional view showing a state in which attached to the femur and tibia bending the knee joint of the present invention.
【図6】本発明の人工膝関節を大腿骨と脛骨に装着し屈曲した状態を示す要部断面図である。 [6] The artificial knee joint of the present invention is a fragmentary cross-sectional view showing a state in which attached bent femur and tibia.
【符号の説明】 DESCRIPTION OF SYMBOLS
1 大腿骨部材2 主凸状摺動面3 副凸状摺動面4 脛骨部材5 主凹状摺動面6 副凹状摺動面7 トレー8 内底面9 中間部材10 大腿骨11 脛骨12 表側面13 多孔質部14 スパイク15 ステムR 1 ,R 2球半径 1 femoral component 2 main convex sliding surface 3 secondary convex sliding surface 4 tibial member 5 main concave sliding surface 6 sub concave sliding surface 7 tray 8 in the bottom surface 9 intermediate member 10 femur 11 tibia 12 front plane 13 porous portion 14 spike 15 stem R 1, R 2 ball radius

Claims (3)

  1. 大腿骨に固定される大腿骨部材と脛骨に固定される脛骨部材から成り且つ摺動面をセラミック材で構成した人工膝関節において、上記大腿骨部材の裏底側左右に球面状をした主凸状摺動面を形成し、他方の脛骨部材の左右側に球面状をした主凹状摺動面を形成し、伸展時には、これら凸、凹状の主摺動面が互いに嵌合し回動するように成すとともに、上記大腿骨部材の後部中央摺動部に球面状をした副凸状摺動面を形成し、他方の脛骨部材の後部中央摺動部に球面状をした副凹状摺動面を形成し、屈曲時には、これら凸、凹状の副摺動面が互いに嵌合し回動するように構成してなり、且つ、前記凸、凹状の主摺動面および前記凸、凹状の副摺動面の真円度が±1μm以内であるとともに、前記主凸状摺動面と前記主凹状摺動面とのクリアランス In the artificial knee joint constitute and sliding surface consists of a tibial member fixed to the femoral member and the tibial fixed to the femur with a ceramic material, and a spherical back bottom left and right of the femoral component Shutotsu to form a Josurido surface to form a main concave sliding surface which is a spherical to the left and right side of the other of the tibial member, at the time of extension, these projections, the main sliding surface of the concave is fitted to turn relative to each other together form a form a sub-convex sliding surface that is a spherical to the rear center sliding portion of the femoral component, a sub concave sliding surface which is a spherical to the rear center sliding portion of the other of the tibial member formed, at the time of bending, these convex, becomes configured as sub-sliding surface of the concave is fitted to turn relative to each other, and the convex, concave main sliding surface and the convex, concave secondary slide with roundness is within ± 1 [mu] m of the surface, the clearance between the main concave sliding surface and the main convex sliding surface および前記副凸状摺動面と前記副凹状摺動面とのクリアランスが7〜10μm以下であることを特徴とする人工膝関節。 And the artificial knee joint, wherein a clearance between the auxiliary convex sliding surface and the sub concave sliding surface is less than 7~10Myuemu.
  2. 前記凸、凹状の主摺動面および前記凸、凹状の副摺動面は平均面粗度Ra≦0.02μ m であることを特徴とする請求項1記載の人工膝関節。 The convex, concave main sliding surface and the convex, according to claim 1, wherein the artificial knee joint, wherein the concave sub-sliding surface is the average surface roughness Ra ≦ 0.02μ m.
  3. 前記主凸状摺動面と主凹状摺動面の球半径R 1 が10〜20mm、前記副凸状摺動面と副凹状摺動面の球半径R 2 が5〜15mmであることを特徴とする請求項1記載の人工膝関節。 Wherein the spherical radius R 1 of the main convex sliding surface and the main concave sliding surface 10 to 20 mm, the spherical radius R 2 of the sub-convex sliding surface and the secondary concave sliding surface is 5~15mm claim 1, wherein the artificial knee joint to.
JP32052496A 1996-11-29 1996-11-29 Artificial knee joint Expired - Fee Related JP3667909B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32052496A JP3667909B2 (en) 1996-11-29 1996-11-29 Artificial knee joint

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Application Number Priority Date Filing Date Title
JP32052496A JP3667909B2 (en) 1996-11-29 1996-11-29 Artificial knee joint

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JPH10155824A JPH10155824A (en) 1998-06-16
JP3667909B2 true JP3667909B2 (en) 2005-07-06

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Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20100962U1 (en) * 2001-01-19 2001-05-03 Keramed Medizintechnik Gmbh Inlay for a knee endoprosthesis
US7955394B2 (en) 2005-07-14 2011-06-07 Saga University Artificial knee joint
CA2684759C (en) * 2007-05-15 2015-11-03 Barry M. Fell Surgically implantable knee prosthesis with captured keel
US20160310279A1 (en) 2007-08-27 2016-10-27 Connor E. Samuelson Systems and methods for providing lightweight prosthetic components
US8366783B2 (en) 2007-08-27 2013-02-05 Samuelson Kent M Systems and methods for providing deeper knee flexion capabilities for knee prosthesis patients
US8382846B2 (en) 2007-08-27 2013-02-26 Kent M. Samuelson Systems and methods for providing deeper knee flexion capabilities for knee prosthesis patients
US9107769B2 (en) 2007-08-27 2015-08-18 Kent M. Samuelson Systems and methods for providing a femoral component
US8273133B2 (en) 2007-08-27 2012-09-25 Samuelson Kent M Systems and methods for providing deeper knee flexion capabilities for knee prosthesis patients
US9872774B2 (en) 2007-08-27 2018-01-23 Connor E. Samuelson Systems and methods for providing a femoral component having a modular stem
GB2483492A (en) 2010-09-10 2012-03-14 John Goodfellow Femoral prosthetic component with extension

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