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ARTIFICIAL JOINT meetings

Foreign code F110002884
File No. S2009-0945-C0
Posted date May 9, 2011
Country WIPO
International application number 2010JP068616
International publication number WO 2011/049176
Date of international filing Oct 21, 2010
Date of international publication Apr 28, 2011
Priority data
  • P2009-244082 (Oct 23, 2009) JP
  • P2010-060129 (Mar 17, 2010) JP
Title ARTIFICIAL JOINT meetings
Abstract An artificial joint configured so that the wear of friction materials is minimized and that bioactivity due to wear powder generated from friction surfaces is minimized. An artificial hip joint (10) is provided with a ball (20) and a cup (30) which are a set of joint members for configuring a joint, the set of joint members having formed therebetween a convex surface (21) and a concave surface (31) which are a pair of friction surfaces which slide relative to each other while being in contact with each other with a lubricating liquid (40) therebetween. Of the convex surface (21) and the concave surface (31), the convex surface (21) which is at least one friction surface is provided with: recesses (23) which are formed at least in a groove shape or a hole shape having a width gradually reduced from the front surface side toward the inner side of the convex surface (21); and curved surfaces (24) each smoothly connecting a sloped surface (23a) which forms a recess (23) and a surface which forms a front surface of the convex surface (21). Preferably, the recesses (23) have a depth in the submicron range.
Scope of claims (In Japanese)
【請求項1】 関節を構成する一対の関節部材を有し、該一対の関節部材間に、潤滑液を介して互いに接触した状態で相対的に摺動する一対の摩擦面を形成する人工関節であって、
 前記一対の摩擦面のうち少なくとも一方の前記摩擦面は、
 前記摩擦面の表面側から内側にかけて徐々に幅が狭くなる溝状および穴状の少なくともいずれかの凹部と、
 該凹部を形成する面と前記摩擦面の表面部を形成する面とを
滑らかに繋ぐ曲面部と、
 を有することを特徴とする人工関節。

【請求項2】 前記凹部の深さは、大きくてもサブミクロンサイズであることを特徴とする請求項1に記載の人工関節。

【請求項3】 前記一対の摩擦面のうち、一方の前記関節部材により形成される前記摩擦面は、金属材料により形成され、他方の前記関節部材により形成される前記摩擦面は、樹脂材料により形成されるものであり、
 金属材料により形成される前記摩擦面に、前記凹部と前記曲面部とを有することを特徴とする請求項1または請求項2に記載の人工関節。

【請求項4】 前記凹部は、サイズ、形状、および前記摩擦面における分布密度の少なくともいずれかの調整により、前記摩擦面から生じる摩耗粉の量、サイズ、および形状の少なくともいずれかをコントロールするための形状部分として用いられることを特徴とする請求項1~3のいずれか1項に記載の人工関節。

【請求項5】 前記凹部は、前記摩擦面から生じる摩耗粉がマクロファージによる貪食の対象から除外されるサイズ・形状となるように形成されていることを特徴とする請求項1~4のいずれか1項に記載の人工関節。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITY
  • Inventor
  • NAKANISHI Yoshitaka
  • TOUGE Mutsumi
IPC(International Patent Classification)
Specified countries AE(UTILITY MODEL),AG,AL(UTILITY MODEL),AM(PROVISIONAL PATENT)(UTILITY MODEL),AO(UTILITY MODEL),AT(UTILITY MODEL),AU,AZ(UTILITY MODEL),BA,BB,BG(UTILITY MODEL),BH(UTILITY MODEL),BR(UTILITY MODEL),BW,BY(UTILITY MODEL),BZ(UTILITY MODEL),CA,CH,CL(UTILITY MODEL),CN(UTILITY MODEL),CO(UTILITY MODEL),CR(UTILITY MODEL),CU(INVENTOR'S CERTIFICATE),CZ(UTILITY MODEL),DE(UTILITY MODEL),DK(UTILITY MODEL),DM,DO(UTILITY MODEL),DZ,EC(UTILITY MODEL),EE(UTILITY MODEL),EG(UTILITY MODEL),ES(UTILITY MODEL),FI(UTILITY MODEL),GB,GD,GE(UTILITY MODEL),GH(UTILITY CERTIFICATE),GM,GT(UTILITY MODEL),HN(UTILITY MODEL),HR(CONSENSUAL PATENT),HU(UTILITY MODEL),ID,IL,IN,IS,JP(UTILITY MODEL),KE(UTILITY MODEL),KG(UTILITY MODEL),KM,KN,KP(INVENTOR'S CERTIFICATE)(UTILITY MODEL),KR(UTILITY MODEL),KZ(PROVISIONAL PATENT)(UTILITY MODEL),LA,LC,LK,LR,LS(UTILITY MODEL),LT,LU,LY,MA,MD(UTILITY MODEL),ME,MG,MK,MN,MW,MX(UTILITY MODEL),MY(UTILITY-INNOVATION),MZ(UTILITY MODEL),NA,NG,NI(UTILITY MODEL),NO,NZ,OM(UTILITY MODEL),PE(UTILITY MODEL),PG,PH(UTILITY MODEL),PL(UTILITY MODEL),PT(UTILITY MODEL),RO,RS(PETTY PATENT),RU(UTILITY MODEL),SC,SD,SE,SG,SK(UTILITY MODEL),SL(UTILITY MODEL),SM,ST,SV(UTILITY MODEL),SY,TH(PETTY PATENT),TJ(UTILITY MODEL),TM(PROVISIONAL PATENT),TN,TR(UTILITY MODEL),TT(UTILITY CERTIFICATE),TZ,UA(UTILITY MODEL),UG(UTILITY CERTIFICATE),US,UZ(UTILITY MODEL),VC(UTILITY CERTIFICATE),VN(PATENT FOR UTILITY SOLUTION),ZA,ZM,ZW,EP(AL,AT,BE,BG,CH,CY,CZ,DE,DK,EE,ES,FI,FR,GB,GR,HR,HU,IE,IS,IT,LT,LU,LV,MC,MK,MT,NL,NO,PL,PT,RO,RS,SE,SI,SK,SM,TR),OA(BF(UTILITY MODEL),BJ(UTILITY MODEL),CF(UTILITY MODEL),CG(UTILITY MODEL),CI(UTILITY MODEL),CM(UTILITY MODEL),GA(UTILITY MODEL),GN(UTILITY MODEL),GQ(UTILITY MODEL),GW(UTILITY MODEL),ML(UTILITY MODEL),MR(UTILITY MODEL),NE(UTILITY MODEL),SN(UTILITY MODEL),TD(UTILITY MODEL),TG(UTILITY MODEL)),AP(BW(UTILITY MODEL),GH(UTILITY MODEL),GM(UTILITY MODEL),KE(UTILITY MODEL),LR(UTILITY MODEL),LS(UTILITY MODEL),MW(UTILITY MODEL),MZ(UTILITY MODEL),NA(UTILITY MODEL),SD(UTILITY MODEL),SL(UTILITY MODEL),SZ(UTILITY MODEL),TZ(UTILITY MODEL),UG(UTILITY MODEL),ZM(UTILITY MODEL),ZW(UTILITY MODEL)),EA(AM,AZ,BY,KG,KZ,MD,RU,TJ,TM)
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