JPWO2020040051A1 - 人工関節及びその製造方法 - Google Patents
人工関節及びその製造方法 Download PDFInfo
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- A61F2/00—Filters 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
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- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
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- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
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- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
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- A61F2/00—Filters 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
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- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
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- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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- A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
- A61F2/02—Prostheses implantable into the body
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- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30838—Microstructures
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS 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
- A61F2/00—Filters 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
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Abstract
Description
本実施形態における、人工関節1のステム部2には、表面が粗く形成される粗面化部4が設けられており、人工関節1のステム部2を骨に挿入した際に摩擦力によって固定される。そして、粗面化部4は、基端側領域8よりも、先端側端部領域7の表面の粗さが低くなるように設定されている。これにより、本実施形態における人工関節1によると、先端側の端部において表面の粗さが低くなるように設定されていない従来の人工関節1と比較して、粗面化部4の先端側の端部における亀裂の発生、及び破断等を回避することができる。これによって、疲労強度の向上を図ることができる。そして、粗面化部4の端部の位置をずらす必要もなく、使用に際しての体重制限の制約も回避することができる。また、上記の構成の人工関節1によると、基端側領域8の粗さが先端側端部領域7よりも大きく設定されているため、骨への十分な固定性も確保できる。
以上、本発明の実施形態について説明したが、本発明は上述の実施形態に限られるものではなく、請求の範囲に記載した限りにおいて様々な変更が可能である。例えば、次のように変更して実施してもよい。
2 ステム部
4 粗面化部
6 溶射層
7 先端側端部領域
8 基端側領域
9 傾斜面
10 基端側第1領域
11 基端側第2領域
Claims (10)
- ステム部を有する人工関節であって、
前記ステム部には、骨に挿入される側である先端側と反対側である基端側に設けられて、表面が先端側よりも粗く形成されているとともに先端側よりも断面積が大きい粗面化部が設けられており、
前記粗面化部には、当該粗面化部における先端側の端部の領域を含む先端側端部領域と、前記先端側端部領域よりも基端側の領域として構成される基端側領域とが設けられ、
前記先端側端部領域の表面の粗さが前記基端側領域の表面の粗さよりも低いことを特徴とする、人工関節。 - 請求項1に記載の人工関節であって、
前記粗面化部の先端側の端部において、先端側に向かって傾斜する傾斜面が設けられていることを特徴とする、人工関節。 - 請求項1又は請求項2に記載の人工関節であって、
前記基端側領域は、当該基端側領域における前記先端側端部領域に隣接する領域である基端側第1領域と、当該基端側第1領域に対して先端側端部領域側と反対側で隣接する基端側第2領域と、を有し、前記基端側第1領域の表面の粗さが、先端側から基端側にかけて、前記先端側端部領域の表面の粗さと同じ水準の粗さから前記基端側第2領域の表面の粗さと同じ水準の粗さまで徐々に高くなるように変化することを特徴とする、人工関節。 - 請求項2又は請求項3に記載の人工関節であって、
前記粗面化部は、表面において、溶射材で構成された溶射層を有し、前記溶射層が、前記先端側端部領域において基端側に向かって厚みが厚くなることで、前記傾斜面が構成されていることを特徴とする、人工関節。 - 請求項2乃至請求項4の何れか1項に記載の人工関節であって、
前記ステム部2の前記溶射層に覆われる部分である母材部2aの面と、前記溶射層の先端側における面とのなす角である立ち上り角が、45度以下であることを特徴とする、人工関節。 - 請求項1乃至請求項5の何れか1項に記載の人工関節であって、
算術平均粗さとして求められる前記先端側端部領域の表面粗さが35μm以下であり、算術平均粗さとして求められる前記基端側領域の表面粗さが40μm以上であることを特徴とする、人工関節。 - 請求項1乃至請求項6の何れか1項に記載の人工関節であって、
前記ステム部は、少なくともチタン合金及び純チタンのうちのいずれか一方を含むことを特徴とする、人工関節。 - 請求項1乃至請求項7の何れか1項に記載の人工関節であって、
大腿骨に適用される人工股関節のインプラントであることを特徴とする、人工関節。 - 骨に挿入される側である先端側と反対側である基端側を備えるステム部を有する人工関節の製造方法であって、
溶射材で構成された溶射層に覆われる部分である母材部を作製する母材部作製工程と、前記母材部の一部をマスキング材で覆うマスキング工程と、溶射材が溶射されて前記先端側よりも表面が粗く形成されるとともに前記先端側よりも断面積が大きい前記ステム部の前記基端側における粗面化部が形成される粗面化部形成工程と、を含み、
前記粗面化部形成工程において、前記粗面化部における前記先端側の端部の領域を含む先端側端部領域に前記溶射材を溶射するとき、基端側領域として構成される基端側領域に前記溶射材を溶射するときの溶射時間、溶射温度、及び溶射材を吹き付ける圧力の条件に対して、前記先端側端部領域の表面粗さを前記基端側領域の表面粗さよりも低くするために、1以上の条件を変更することを特徴とする、人工関節の製造方法。 - 請求項9に記載の人工関節の製造方法であって、
前記マスキング工程において、前記ステム部にマスキングされた状態における前記マスキング材は、前記ステム部の中心軸を通る断面の断面視において、前記ステム部に対してオーバーハングしてマスキングされており、前記粗面化部の前記先端側の端部において、前記先端側に向かって傾斜する傾斜面が形成されていることを特徴とする、人工関節の製造方法。
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Application Number | Priority Date | Filing Date | Title |
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JP2018156119 | 2018-08-23 | ||
JP2018156119 | 2018-08-23 | ||
PCT/JP2019/032143 WO2020040051A1 (ja) | 2018-08-23 | 2019-08-16 | 人工関節及びその製造方法 |
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US20230240853A1 (en) * | 2020-04-22 | 2023-08-03 | Kyocera Corporation | Artificial joint shell and method for manufacturing artificial joint shell |
AU2020450413A1 (en) | 2020-05-29 | 2023-01-19 | Kyocera Corporation | Stem for artificial joint |
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WO2001076653A1 (en) * | 2000-04-04 | 2001-10-18 | Nobel Biocare Ab (Publ) | Implant provided with attachment and hole-insert parts, and a method for producing such an implant |
JP2014008195A (ja) * | 2012-06-29 | 2014-01-20 | Sammy Corp | ぱちんこ遊技機 |
WO2015107841A1 (ja) * | 2014-01-14 | 2015-07-23 | 京セラメディカル株式会社 | 人工股関節用ステムおよびそれを備える人工股関節 |
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JP3318407B2 (ja) | 1993-10-29 | 2002-08-26 | 京セラ株式会社 | チタン溶射生体インプラント材 |
JP3752332B2 (ja) | 1996-11-28 | 2006-03-08 | 京セラ株式会社 | 人工股関節 |
WO2000059410A2 (de) * | 1999-04-07 | 2000-10-12 | Plus Endoprothetik Ag | Blattartiger schaft einer hüftgelenkprothese für die verankerung im femur |
EP1498090A1 (de) * | 2003-07-16 | 2005-01-19 | WALDEMAR LINK GmbH & Co. KG | Hüftprothese mit einem in den Oberschenkelknochen einzusetzenden Schaft |
US20080221681A1 (en) | 2007-03-09 | 2008-09-11 | Warsaw Orthopedic, Inc. | Methods for Improving Fatigue Performance of Implants With Osteointegrating Coatings |
FR2923375B1 (fr) * | 2007-11-14 | 2010-08-27 | Fournitures Hospitalieres Ind | Tige femorale prothetique |
JP5965746B2 (ja) * | 2012-06-29 | 2016-08-10 | 京セラメディカル株式会社 | 人工関節用ステム、人工関節用ステムの部品、及び人工関節用ステムの製造方法 |
WO2014189928A1 (en) * | 2013-05-20 | 2014-11-27 | Ranawat Chitranjan S | Femoral component for a hip prosthesis |
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WO2001076653A1 (en) * | 2000-04-04 | 2001-10-18 | Nobel Biocare Ab (Publ) | Implant provided with attachment and hole-insert parts, and a method for producing such an implant |
JP2014008195A (ja) * | 2012-06-29 | 2014-01-20 | Sammy Corp | ぱちんこ遊技機 |
WO2015107841A1 (ja) * | 2014-01-14 | 2015-07-23 | 京セラメディカル株式会社 | 人工股関節用ステムおよびそれを備える人工股関節 |
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US11793648B2 (en) | 2023-10-24 |
US20210322176A1 (en) | 2021-10-21 |
EP3842013A4 (en) | 2021-10-27 |
US20240000574A1 (en) | 2024-01-04 |
CN112584798A (zh) | 2021-03-30 |
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