JPH05208028A - 軸桿付き移植体の集合体 - Google Patents

軸桿付き移植体の集合体

Info

Publication number
JPH05208028A
JPH05208028A JP4263386A JP26338692A JPH05208028A JP H05208028 A JPH05208028 A JP H05208028A JP 4263386 A JP4263386 A JP 4263386A JP 26338692 A JP26338692 A JP 26338692A JP H05208028 A JPH05208028 A JP H05208028A
Authority
JP
Japan
Prior art keywords
groove
implant
length
transplantation
rod
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.)
Pending
Application number
JP4263386A
Other languages
English (en)
Inventor
Nisra Thongpreda
トンプレダ ニスラ
Roy Y Hori
ワイ．ホリ ロイ
Richard F Kyle
エフ．カイル リチャード
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bristol Myers Squibb Co
Original Assignee
Bristol Myers Squibb Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bristol Myers Squibb Co filed Critical Bristol Myers Squibb Co
Publication of JPH05208028A publication Critical patent/JPH05208028A/ja
Pending legal-status Critical Current

Links

Classifications

    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/3676—Distal or diaphyseal parts of shafts
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/367—Proximal or metaphyseal parts of shafts
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
    • A61F2002/30014—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30319—The prosthesis having different structural features at different locations within the same prosthesis differing in moment of inertia
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30324—The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30326—The prosthesis having different structural features at different locations within the same prosthesis differing in height or in length
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30594—Special structural features of bone or joint prostheses not otherwise provided for slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
    • 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
    • A61F2/30767—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
    • A61F2002/3082—Grooves
    • 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
    • A61F2/30767—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
    • A61F2002/3082—Grooves
    • A61F2002/30827—Plurality of grooves
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A61F2002/3627—Necks with lateral apertures, holes or openings
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0018—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0036—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
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    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0037—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in height or in length

Abstract

(57)【要約】 【目的】 本発明は制御された剛性を有する移植用股関
節軸桿を提供する。 【構成】 移植体固定軸桿は制御された剛性を有する末
端部分を有している。１つの実施態様では与えられた力
に応じたたわみが他の同様に構成された軸桿に等しくそ
れにより移植体の大きさに関係なく不変の移植フィード
バックを外科医に与えるようにする。前記のたわみは好
ましくは軸桿の溝を介してもたらされ、溝の長さは軸桿
の慣性モーメントの関数として決定される。他の実施態
様は異なった長さの複数の縦溝を有している。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は人工補装用股関節移植体
のような移植体固定軸桿に関する。さらに詳細には、本
発明は軸桿剛性と軸桿移植特性との制御に関するもので
ある。
【０００２】
【従来の技術】股関節取替え手術において、大腿骨の内
部空間をできるだけ充填させる移植体を用いるのが有利
である。このため、特別の股関節軸桿構造が様々な寸法
を有する集合体として通常提供される。外科手術の間、
大腿骨は粗目やすりにより中空にされそして適当な大き
さとされた移植体がこの中空大腿骨の中に押し込まれ
る。しかし、大腿骨はわん曲されそれにより大腿骨を充
たす軸桿と、移植と大腿骨上の圧力とに対する過度の抵
抗なしでこのわん曲部を通過することのできる軸桿との
間に交換が存在するようにしている。移植を容易にする
ため種々の手段により軸桿の剛性を減少させ軸桿が大腿
骨わん曲部を通過するとき大腿骨が割れることがないよ
うにすることが知られている。これは軸桿の大きさが増
すほど軸桿の剛性がほぼ指数関数的に増大するので、部
分的な解決方法にすぎない。したがって、より大きな軸
桿は移植するのが増々困難となる。従来技術は個々の移
植体の剛性を制御することだけでなくある範囲の軸桿の
大きさを有する移植体集合体内の移植体間の相対的な剛
性を制御することもまた重要であることを正しく認識し
ていなかった。これは、外科医が軸桿をつけた移植体を
中空にした骨の中に押し込んでいるとき大腿骨の損傷が
起こりそうであるかどうかまた移植体が工合良く着座し
たかどうかを決定するため移植体が中空の骨の中にどの
程度容易に挿入できたかをフィードバックすることに頼
っていたからである。従来の装置に関し小さな移植体か
らのこのフィードバックは大きな移植体のフィードバッ
クとは異なり、外科医にとって移植処置に対する精通性
を増進させることは困難となる。
【０００３】
【発明が解決しようとする課題】本発明の目的はしたが
って、制御された剛性を有する股関節軸桿を提供するこ
とである。本発明の他の目的は、移植中の外科医へのフ
ィードバックが移植体の大きさの範囲に対し均一であり
そのため外科医が移植処置に良く精通し大腿骨の安全と
移植体の着座に信頼性をもたらすことができるように、
軸桿の剛性を制御することである。本発明のさらに他の
目的は大腿骨の中に容易に挿入することのできる股関節
軸桿を提供することである。
【０００４】
【課題を解決するための手段】上記の目的は、溝のつけ
られた末端を有し、この溝の幾何学形状がある範囲の大
きさの全ての軸桿に対する力に応じて実質的に同じ軸桿
のたわみをもたらすよう計算されている股関節軸桿によ
って、達成される。本発明の股関節軸桿の他の実施態様
は、末端の軸桿に種々の長さの縦溝を有しさらに剛性を
制御するようになっている。外側及び内側面取り部が設
けられ股関節軸桿の大腿骨への挿入を容易にしまた金属
対金属の摩耗を防止するようにしている。
【０００５】
【実施例】図面を参照すると、本発明の大腿股関節移植
体は頸部１と頸部末端の軸桿２とを有している。軸桿２
は、それぞれの大きさとは無関係に他の同様に構成され
た移植体と実質的に同じ所定の力に応じて所定のたわみ
を有するようになっている。この均一の剛性は、全ての
同様な移植体が外科医に対し移植に対する同じ抵抗を提
供しそれにより外科医が移植を受けている大腿骨の安全
性と移植体の正しい着座とに信頼をおくことができるよ
うにする。
【０００６】好ましい実施態様においては、軸桿の剛性
は質量減少縦溝１１と１２を介し大ざっぱにそして精密
には溝３を介して制御される。図１及び２に示すよう
に、引っ張り方向に負荷がかけられる側部溝１１は長さ
が前面溝１２よりも短い。好ましくはこの移植体はその
後面と中間部分とに反対側の縦溝と対応の縦溝とを含ん
でいる。溝３は好ましくは図示のように移植体の中間側
部平面上にある。移植体が大腿骨の中に挿入されるにし
たがって溝３の一方又は両方の側面が内側に向かって屈
曲し挿入が容易となる。溝３の一側が線Ａ−Ａに沿って
固定された単一の片持ち梁式のビーム（梁）として設計
されていたならば、図４は得られる設計上の問題を図解
して示す。この場合 ここでたわみ“Ｙmax"は、材料特性“Ｅ”と断面特性
“Ｉ”とを有する長さ“ｌ”のビームにおける力“Ｆ”
によって生じたものである。与えられた力“Ｆ”に対す
る所望のたわみ“Ｙmax"を知る移植体の設計者は、各移
植体について溝３の長さ“ｌ”を とすることにより、均一の軸桿剛性を有するよう体系的
な移植体の集合体を作り出すことができる。
【０００７】力“Ｆ”とたわみ“Ｙmax"とはこの集合体
における全ての移植体に対して一定に保持されまたこの
集合体における予定する全ての移植体が同じ材料で作ら
れるので、溝の長さは下記のように各移植体の断面特性
“Ｉ”の関数となる。 ｌ＝ｆｎ〔Ｉ〕 （３）
【０００８】好ましい移植体は軸桿２の端部８における
半径６と７に加えて外側面取り部４と内側面取り部５と
を有している。外側面取り部４は移植体の大腿骨への挿
入をより容易にしまた移植体が大腿骨を下方に滑らかに
移動できるようにする。移植体軸桿２は大腿骨の内部に
密接に嵌合するようになっている。したがって外側面取
り部の長さを限定し（約０．８０００″すなわち約２
０．３mmに）軸桿２の端部８に明確な起伏（約１．５mm
の）と、軸桿と大腿骨の内側との間の密接嵌合への急な
変移部とが得られるようにする。外側面取り部４は移植
体の全ての寸法に対して同一である。
【０００９】内側面取り部５は間隙をもたらしそれによ
り溝３の側面が接触せずまたそのためたわみを制限し又
はこれら側面が相互に摩滅しないようにする。外側面取
り部４とは対照的に、比較的長い（溝３の長さの約２分
の１）内側面取り部５を有し溝３の側面が相互に接触し
ないよう保証することが好ましい。溝の端部の内側起伏
は、所定の最小荷重“Ｆ”（約５００ポンドすなわち約
２２５kg）を受けた時この溝が密接することがないよう
な寸法とされる。この移植体の増進された移植性と嵌合
性の十分な利点を得るため、大腿骨の屈曲に合致する屈
曲部“Ｂ”と“Ｃ”の部分を設けることが好ましい。さ
らに、多孔の表面９を設けて組織の成長による固定強度
を増大しまたカラー１０を設けて移植体の安定性を増大
することが好ましい。
【００１０】上記のように本発明の好適な実施態様が記
載されてきたが、開示された特定の寸法は単に例示のた
めに示されたものである。さらに、本発明は股関節に用
いる以外の軸桿を付けた移植体に使用することができ
る。
【００１１】この技術に習熟した者にとって、種々の変
更が特許請求の範囲に記載された本発明の精神と範囲か
ら逸脱することなく、この好適な実施態様に対しなし得
ることが理解されるであろう。
【図面の簡単な説明】
【図１】右の大腿股関節移植体の側面図である。
【図２】図１の大腿股関節移植体の前面図である。
【図３】図１の股関節移植体の末端部の詳細図である。
【図４】この開示の計算の根拠とする単一の片持ち梁模
型を示す図解図である。
【符号の説明】
１…頸部 ２…軸桿 ３…溝 ４…外側面取り部 ５…内側面取り部 ８…軸桿端部 １１…側部縦溝 １２…前面縦溝
───────────────────────────────────────────────────── フロントページの続き (72)発明者 ニスラ トンプレダ アメリカ合衆国，インディアナ 46580, ワルソー，ノース パーカー (72)発明者 ロイ ワイ．ホリ アメリカ合衆国，インディアナ 46580, ワルソー，サウス オールド ディッチ ロード 2261 (72)発明者 リチャード エフ．カイル アメリカ合衆国，ミネソタ 55356，ロン グ レイク，トンカワ ロード 1140

Claims (9)

    【特許請求の範囲】
  1. 【請求項１】 各移植体が、他の移植体の力と実質的に
    等しい所定の力に応じて所定のたわみを呈する軸桿の部
    分を有している軸桿付き移植体の集合体。
  2. 【請求項２】 各移植体の軸桿が溝を含む末端部分を有
    している請求項１に記載の集合体。
  3. 【請求項３】 溝がその末端で内側が面取りされている
    請求項２に記載の集合体。
  4. 【請求項４】 溝がその末端で外側が面取りされている
    請求項３に記載の集合体。
  5. 【請求項５】 溝が中間の側部平面に切り込まれている
    請求項４に記載の集合体。
  6. 【請求項６】 内側面取り部の長さが溝の長さの約２分
    の１に等しく、外側面取り部の長さが内側面取り部の長
    さよりは大きくない請求項４に記載の集合体。
  7. 【請求項７】 頸部を区画形成する端部と反対側の丸く
    された端部とを有する軸桿を具備し、丸くされた端部が
    ２つの側面を区画形成する溝を含み、該溝の一方の側面
    はさらに外側が面取りされ、該溝の他方の側面は内側が
    面取りされ該内側面取り部の長さが少なくとも前記外側
    面取り部の長さと同じ長さになるようにしている大腿股
    関節移植体。
  8. 【請求項８】 溝が中間側部平面に切り込まれている請
    求項７に記載の移植体。
  9. 【請求項９】 大腿骨の中に挿入する股関節移植体であ
    って、大腿骨の中間部側面部分、前面部分及び後面部分
    に関連する外形を有し、また頸部を区画形成する基端部
    と反対側の末端部とを有する軸桿を具備し、該軸桿の末
    端部に隣接する部分が、基部方向に延びる中間部側面、
    前面及び後面の縦溝を含み、中間部側面の縦溝の長さが
    前面及び後面の縦溝の長さより短くなっている、股関節
    移植体。
JP4263386A 1991-11-19 1992-10-01 軸桿付き移植体の集合体 Pending JPH05208028A (ja)

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US79428991A 1991-11-19 1991-11-19
US794289 1991-11-19

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JPH05208028A true JPH05208028A (ja) 1993-08-20

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EP (1) EP0543099A3 (ja)
JP (1) JPH05208028A (ja)
AU (1) AU659195B2 (ja)
CA (1) CA2078818A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010518905A (ja) * 2007-02-16 2010-06-03 コンセプト・デザイン・アンド・ディベロプメント・エルエルシー 組織温存インプラント

Also Published As

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CA2078818A1 (en) 1993-05-20
EP0543099A2 (en) 1993-05-26
US5702482A (en) 1997-12-30
AU2219992A (en) 1993-05-20
EP0543099A3 (en) 1994-05-25
AU659195B2 (en) 1995-05-11
US5507829A (en) 1996-04-16

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