JP2007144011A - セメントレス型人工股関節用ステム - Google Patents
セメントレス型人工股関節用ステム Download PDFInfo
- Publication number
- JP2007144011A JP2007144011A JP2005345097A JP2005345097A JP2007144011A JP 2007144011 A JP2007144011 A JP 2007144011A JP 2005345097 A JP2005345097 A JP 2005345097A JP 2005345097 A JP2005345097 A JP 2005345097A JP 2007144011 A JP2007144011 A JP 2007144011A
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- JP
- Japan
- Prior art keywords
- stem
- hip joint
- bone
- body portion
- outer body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
- A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
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Abstract
【解決手段】股関節に作用した荷重を受け入れる内部構造体7とこの内部構造体からの荷重を大腿骨1に伝達する外部構造体8とで構成される。前者にはネック部7Aとの間で荷重を授受するインナボディ部7Bがあり、後者にはインナボディ部7Bを取り囲み骨端側に開口するベルマウス状のアウタボディ部8Aと、骨髄腔に向けて延びるレグ部8Bとがある。アウタボディ部8Aの近位部端と遠位部端およびレグ部8Bに与えられる捩り剛性は、アウタボディ部8Aの中間部位18のそれより低くされる。
【選択図】図1
Description
Claims (19)
- 大転子を避けて大腿骨の骨端領域から骨幹領域に向けて形成した窄孔に挿入され、ボーングロースにより大腿骨との結合力を発生させるようにしたセメントレス型人工股関節用ステムにおいて、
骨盤に固定したソケットと協働して関節運動する球状ヘッドを取りつけたネック部と、このネック部との間で荷重を授受するインナボディ部とが備えられている内部構造体と、 前記インナボディ部を取り囲み骨端側に開口するベルマウス状のアウタボディ部と、このアウタボディ部に連なり骨髄腔に向けて延びるレグ部とが備えられ、アウタボディ部内の空間には前記インナボディ部との一体化を図る接着用レジンが充填され、股関節に作用する荷重を大腿骨に伝達する繊維強化樹脂製の外部構造体と、
を有し、前記アウタボディ部の近位部端と遠位部端およびレグ部に与えられる捩り剛性はアウタボディ部の中間部位のそれより低くされ、中間部位に集約させた荷重を概ね均して大腿骨の近位部に伝達させることができるようにしたことを特徴とするセメントレス型人工股関節用ステム。 - 前記インナボディ部は外部構造体の内面に直接接触していないことを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記インナボディ部の遠位部側端が外部構造体の内面に接触していることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記外部構造体はポリエーテルエーテルケトン等の熱可塑性樹脂をマトリックスとし、無機質繊維を強化材とした複合材成形品であることを特徴とする請求項1ないし請求項3のいずれか一項に記載されたセメントレス型人工股関節用ステム。
- 前記アウタボディ部内の充填レジンはポリエーテルエーテルケトン等の熱可塑性樹脂またはそれにチョップドファイバを混入させたコンパウンドとしたことを特徴とする請求項1ないし請求項4のいずれか一項に記載されたセメントレス型人工股関節用ステム。
- 前記アウタボディ部の中間部位を除く各部の捩り剛性は、その対応部分における窄孔周囲の骨質のそれより小さく与えられ、中間部位の捩り剛性は、その対応部分における窄孔周囲の骨質のそれより大きく与えられていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- ステム軸芯線に対して概ね45度となるように配向された強化繊維だけは前記外部構造体の全面を覆うように積層され、他の配向強化繊維の積層は部分的とされていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 骨幹領域の骨髄腔に進入するときの案内を果たす前記レグ部は、その内部が近位部側端で開口するキャビティとなっていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記内部構造体を繊維強化樹脂製とする場合、ステム軸芯線に対して繊維が約45度に配向される織布と概ね0/90度に配向される織布とが内部構造体の全面を覆って積層されていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記内部構造体は大転子寄りへ張り出すショルダを持たず、ネック部から遠位部に向けてなだらかに変化した外形を持つことを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- アウタボディ部の股間側近位部端近傍にはレジンの非充填部が設けられていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記レグ部内には熱可塑性樹脂またはその発泡体が装填され、外部構造体の遠位部が中実となっていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記アウタボディ部の外表面には、とりわけ中間部位のそれには微細な凹溝が形成されていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記アウタボディ部の外表面には、ハイドロキシアパタイトが塗着されていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記アウタボディ部の近位部端内股側部分には、前記窄孔の開口縁に乗載されるフックが形成されていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記外部構造体および内部構造体は、その軸芯を含む面を境にしてそれぞれ二つ割れとした成形品により形成されていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記インナボディ部の内部は、ネック部を除く部分で遠位部になるにつれて横断面積が大きくなり遠位部側端で開口しているキャビティとなっていることを特徴とする請求項1に記載されたセメントレス型人工股関節用ステム。
- 前記レグ部には、装填されたボーングロース用薬剤の流出孔が設けられていることを特徴とする請求項8に記載されたセメントレス型人工股関節用ステム。
- 前記内部構造体は、コバルト合金またはチタン合金で製作されていることを特徴とする請求項2に記載された大腿骨のためのセメントレス型人工股関節用ステム。
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GB0809937A GB2446105B (en) | 2005-11-30 | 2006-11-28 | An artificial cementless hip prosthesis stem |
PCT/JP2006/323724 WO2007063853A1 (ja) | 2005-11-30 | 2006-11-28 | セメントレス型人工股関節用ステム |
US12/095,251 US8252062B2 (en) | 2005-11-30 | 2006-11-28 | Artificial cementless hip prosthesis stem |
DE112006003275T DE112006003275T5 (de) | 2005-11-30 | 2006-11-28 | Künstlicher, zementfreier Hüftprothesen-Schaft |
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WO2011115229A1 (ja) * | 2010-03-17 | 2011-09-22 | 株式会社ビー・アイ・テック | 複合材人工股関節用ステムの構造と製造方法 |
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CA2815348C (en) | 2010-10-20 | 2018-11-20 | TauTona Group Research and Development Company, L.L.C. | Apparatus and methods for nipple and breast formation |
US8906108B2 (en) * | 2012-06-18 | 2014-12-09 | DePuy Synthes Products, LLC | Dual modulus hip stem and method of making the same |
FR2994077B1 (fr) * | 2012-08-06 | 2015-06-12 | Univ Bordeaux 1 | Prothese condylienne pour une articulation temporo-mandibulaire |
US9271839B2 (en) | 2013-03-14 | 2016-03-01 | DePuy Synthes Products, Inc. | Femoral component for an implantable hip prosthesis |
CN103505307B (zh) | 2013-05-01 | 2015-08-19 | 刘礼初 | 一种生物型人工髋关节股骨柄 |
CN104887354B (zh) | 2015-02-10 | 2017-06-30 | 江苏奥康尼医疗科技发展有限公司 | 一种组合式有机高分子材料人工膝关节 |
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US10772735B2 (en) * | 2015-05-01 | 2020-09-15 | Mayo Foundation For Medical Education And Research | Distal radioulnar joint prosthesis and method of use |
US10537661B2 (en) | 2017-03-28 | 2020-01-21 | DePuy Synthes Products, Inc. | Orthopedic implant having a crystalline calcium phosphate coating and methods for making the same |
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WO2020252166A1 (en) * | 2019-06-12 | 2020-12-17 | Government Of The United States Of America As Represented By The Department Of Veterans Affairs | Femoral head arthroplasty system |
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GB0809937D0 (en) | 2008-07-09 |
DE112006003275T5 (de) | 2008-10-30 |
GB2446105B (en) | 2011-01-26 |
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