JPS628178B2 - - Google Patents

Info

Publication number
JPS628178B2
JPS628178B2 JP53088892A JP8889278A JPS628178B2 JP S628178 B2 JPS628178 B2 JP S628178B2 JP 53088892 A JP53088892 A JP 53088892A JP 8889278 A JP8889278 A JP 8889278A JP S628178 B2 JPS628178 B2 JP S628178B2
Authority
JP
Japan
Prior art keywords
bearing insert
test
spherical
head
test head
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.)
Expired
Application number
JP53088892A
Other languages
English (en)
Other versions
JPS5422994A (en
Inventor
Charusu Riire Richaado
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing 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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of JPS5422994A publication Critical patent/JPS5422994A/ja
Publication of JPS628178B2 publication Critical patent/JPS628178B2/ja
Granted 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
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4684—Trial or dummy prostheses
    • 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
    • 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
    • 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 for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • 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 for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
    • 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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305—Snap connection
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/348—Additional features
    • A61F2002/349—Shell having a wavy or undulated peripheral rim
    • 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
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/006—Additional features; Implant or prostheses properties not otherwise provided for modular
    • A61F2250/0064—Sets comprising a plurality of prosthetic parts of different sizes

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Description

【発明の詳細な説明】 本発明は人間の臀部のための補綴の球および継
手ソケツトに関し、そして特に移植し得る臀部継
手の補綴用の試験ヘツドおよびインサートに関す
る。そのヘツドおよびインサートはそれらが骨髄
内のステムの球端に対し自己錠止するものである
が、工具を用いないで迅速且つ容易にそこから解
放され得る点で特異なものである。
外科的な人間の臀部の修理用の補綴の球および
ソケツト継手はほぼ1948年以来知られている。こ
の外科的な継手修理の初期には球のみが取換えら
れ、人工的な球が臀部の自然の脚窩ソケツトに設
置された。経験上、自然の脚窩ソケツトに対する
人工の球の摩擦が不満足なものであり、脚窩のベ
アリング面が摩耗し、過度の苦痛を与え且つ臀部
継手の強直を生じることがわかつた。
次の発展段階では全臀部の取換えとして知られ
る外科的の方が採られ、その方法では大腿部ヘツ
ドが補綴と取換えられるのみでなく、脚窩ソケツ
トが拡大されて脚窩補綴ソケツトが移植された。
自然の大腿部ヘツドは金属の骨髄内ステムと取換
えられ、そのステムはカラー部およびネツク部を
終端に備え、ネツク部には高度に磨かれた球形の
ベアリング面を有するオフセツト球もしくはヘツ
ド部分が備えられている。補綴の脚窩ソケツト要
素は大腿部要素の球状ヘツドを受けるため、通常
は凹状のカツプ形ソケツト部材の形になつてい
る。脚窩ソケツト要素のベアリング面は通常、超
高分子量のポリエチレンのような合成樹脂で作ら
れる。なめらかな耐久性のある合成樹脂に対する
高度に磨かれた金属面の組合わせは低摩擦で長寿
命の継手作用を与えている。
これら全臀部取換え補綴は全く成功したが、そ
こに含まれる外科的な方法が非常に複雑で時間の
かかるものである。手術に要する時間が長いこと
から、伝染および併発の危険が非常に高く、且つ
外科的な外傷が過度になり、とくに老人の患者で
はそうである。これらの理由から、臀部処置の大
部分のものに部分臀部取換えが好んで用いられる
方法が開発された。アバリルの米国特許第
3863273号は大腿部の骨髄内ステムユニツトを有
するこれらの改良型部分補綴の臀部移植継手の一
つを示し、そのステムユニツトは金属ヘツド内に
錠止されるプラスチツクベアリングインサート内
で自由に回転し得る小さな寸法の球形の金属球を
備え、その金属ヘツドは自然の脚窩ソケツト内に
着座するものである。この装置は大腿部のネツク
または大腿部の他の状況の破壊が生じるが脚窩の
機能が影響が受けない場合に推奨される。この部
分臀部継手の取換えはその外傷の外科的方法が迅
速で、容易且つ少なくて済むのみでなく、患者の
全機能も早く回復する。この最近の部分臀部取換
え補綴は臀部移動の大部分がベアリングインサー
トの球形ソケツト内の金属大腿部の球の回転によ
つて生じるので、それ以前の補綴継手よりかなり
良好に作用する。もし大腿部の球／ベアリングイ
ンサートの能力を越えて過度の継手運動が要求さ
れるならば、外側の金属ヘツドが自然の脚窩ソケ
ツト内で若干回転し、その過度の継手運動を吸収
する。
部分臀部の移植は自然の脚窩ソケツトを利用す
るので、自然の大腿部ヘツドに擬態し且つ自然の
脚窩ソケツトと補綴ヘツドとの間のぴつたりした
かん合を確保するため多くの寸法補綴ヘツドが利
用できなくてはならない。部分臀部の移植用の補
綴ヘツドは通常、20.6mm、21.4mm、22.2mm、23.0
mm、23.8mm、24.6mm、25.4mm、26.2mm、26.9mmの
球の半径のものが入手可能である。
本発明はとくに移植し得る部分臀部継手補綴に
適した試験ヘツドおよびベアリングインサートに
関する。最後の移植に用いることができる外側の
ヘツドは通常、金属で作られるが、試験ヘツドは
それが試験的な取付けに挿入される間に脚窩を破
損する可能性を減少するためプラスチツクで作ら
れる。さらに、最終的な金属の外側ヘツドの表面
は高度に磨かれ且つ試験用のこれらの高価な補綴
装置を使用すれば不必要な破損の可能性がある。
適した寸法を決めるため自然の脚窩中に補綴ヘ
ツドを試験的に取付けることは時間のかかるプロ
セスであり、外科的な処置を長びかせる傾向があ
る。
大き過ぎるヘツドは脚窩内に付着しまたは止ま
り且つ大腿部の補綴からゆるく引張る傾向がある
ので、特殊な取外し工具によつて取外される。
本発明の装置は試験ベアリングインサートが試
験大腿部補綴の球に、または同様な形状および寸
法の球を有するハンドルに急速にかん合し得るシ
ステムを含む。そのインサートは試験ヘツドに急
速にかん合することができ、且つその結合体は自
然の脚窩ソケツト内で接合に適しているかどうか
試験される。次いで結合体はハンドルを引くか大
腿部ステムを引くことによつて脚窩ソケツトから
取外すことができ、その場合試験ヘツドが組立体
から離れて脚窩内に付着する危険はない。試験ヘ
ツドの裏側において突出するベアリングインサー
トに対し手袋をはめた指でわずかに圧力を加える
と、大腿部の球／ベアリングインサートは試験ヘ
ツドから迅速且つ容易に解放され、その後適宜異
なる寸法の試験ヘツドが所定位置にはめ込まれて
プロセスが繰返される。適した寸法の試験ヘツド
が選択されると、それは取外され、また試験ベア
リングインサートもスナツプ式に外され、そして
最終的な補綴組立体が通常の方法で所定位置に置
かれて挿入される。
次に図面を参照のもとに本発明について説明す
る。第１図は部分臀部取換えに用いるための代表
的な大腿部ステム補綴１０を示す。ステム１１お
よびカラー１２は、図示のように「Aufranc―
Turner」型であるが、ステムおよび／またはカ
ラーは「Moore」型もしくは「Charnley」型のよ
うに各種の設計のものでもよく、または他のステ
ムおよび／またはカラーの設計のものでもよい。
ステム１１は人間の大腿部の骨髄の孔に外科的に
移植されるようになつており、カラー１２は自然
の大腿部の切除された端部に対し或る重量のベア
リング面を提供する。ネツク部１３はアバリルの
米国特許第3863273号に述べるようにテーパー状
に減少し、ベアリングインサート内での大腿部補
綴の回転に適応したものにしている。大腿部の球
１４は自然の大腿の球に比し小径の高度に磨かれ
た金属の球面である。しかし球１４の球面は後記
目的のため、半球より大きくなければならない。
大腿部ステム１１は通常コバルトクロム合金また
はステンレス鋼のような金属で形成されている。
また、試験的な使用のため、同様な形状および寸
法のネツク１３および球１４を有する適当な形状
のハンドルを本発明において用いることもでき、
もしくは以下に述べるように、完全に異なるスタ
イルの試験ハンドルを用いることもできる。
本発明のベアリングインサート２０はほぼ円筒
形の本体を含み、その本体は大腿部の球１４の球
面の高さより長い複数の離れて垂下した可撓性の
アーム２１および多少剛性の円筒形の後部の突出
部２２を有する。図示のように、ベアリングイン
サート２０の円筒形の後部の突出部２２は主な本
体の直径より小径であり、二つの円筒形の部分は
テーパーの付いた傾斜部によつて接続されてい
る。ベアリングインサート２０はその目的のため
充分な強さと可撓性のある低摩擦材料から作られ
るのが好ましい。好適な材料は「Celcon」（商
標）または「Delrin」（商標）で示されたアセタ
ール樹脂であるが、ポリエチレンやポリプロピレ
ンのような他の材料も用いることができる。この
装置は試験的な取付けのためだけであつて永久の
移植のためではないので、生理学的に不活性なシ
リコンのような材料を使う必要はないが、経済的
に許容されれば、そのような材料を用いてもよい
ことは云うまでもない。再使用ができるように、
繰返される殺菌サイクルに耐え得る材料を用いる
のが好ましい。また、ベアリングインサートは一
部または全体を金属を含むいくつかの材料の結合
で形成することも考えられる。
ベアリングインサート２０の内側の孔２３は球
形であり、且つ大腿部の球１４の寸法より若干大
きく、その僅かな公差がこの装置の作用を容易に
している。内部の球形の孔の面２３は大腿部の球
１４より大きな球の部分を含むので、可撓性のア
ーム２１の内側の曲りは大腿部の球１４の球面を
越えて延び、以下に説明するように装置の作用を
補助する。アーム２１の端部は図示のように凹状
の面取部２４を有し、孔２３内への大腿部の球１
４の挿入を容易にしている。アーム２１の外側の
円筒面はその自由端の近傍で外部の環状のリング
部分２５を有し、その内側の面には好ましくは45
度のテーパーの傾斜した前縁２６が形成されてい
る。この環状のリング部分２５は外側の試験ヘツ
ド３０に在る対応の環状の溝３５の中に着座する
ときに錠止作用を与える。環状のリング部分２５
の後縁はアーム２１の円筒面に対し、図示のよう
に傾斜または90度であつてもよい。環状のリング
部分２５は図示のように外側に平らな面を有して
もよく、または云うまでもなく、相対する試験ヘ
ツド３０に設けられた溝３５に応じてＶ形または
半円形断面にしてもよい。図示の平らな形状は破
損に対する抵抗のために好ましい。ベアリングイ
ンサート２０の外部形状の他の部分は外観から、
または構成の容易さ、その他の点から変更しても
よい。ベアリングインサート２０の外部寸法は各
種寸法の試験ヘツド装置３０の内部寸法に応じて
変えられるが、ベアリングインサート２０を反復
して取外し且つ設置するのを避けて試験取付プロ
セスに必要な時間を減少するため均一寸法のベア
リングインサートを使用するのが好ましい。
外部の試験ヘツド３０も「Celcon」（商標）ま
たは「Delcon」（商標）で作られるのが好まし
い。さらに、材料の選択は試験ヘツドが移植され
ないので、殆んど関係がない。
試験ヘツド３０は種々の球形の直径で形成さ
れ、代表的な寸法は前記のものである。選択を容
易にし、従つて処置を早めるため、試験ヘツド３
０には各種の色が施こされ、または寸法の確認を
容易にするためコード番号やマークを付してもよ
い。均一寸法のベアリングインサート２０を用い
るのが好ましいので、その場合には試験ヘツド３
０の内部形状は同一寸法であり、例外はベアリン
グインサート２０の迅速且つ容易な挿入を促進す
る面取りされた導入面３１である。ベアリングイ
ンサート２０の後部の部分２２を収める後部の孔
３２は主要な孔３３より小径なものとして示され
且つその間に面取りされた部分３４が備えられて
いる。また、孔３３および３２は単一の同一径、
即ち円筒状にすることもでき、その場合ベアリン
グインサート２０は同様に同一径とされる。環状
の溝３５はベアリングインサート２０の環状のリ
ング部分２５を収めるため試験ヘツド３０の導入
面３１の近くに備えられている。
第２図は試験的な挿入のために組立てられた各
種要素を示す。ベアリングインサート２０は最初
に大腿部の球１４にスナツプ式に取付けられ、イ
ンサートのアーム２１の弾性によりそれらアーム
が充分に開いて大腿部の球１４を通過させ且つ把
持するのを可能にしている。
この部分組立体は試験ヘツド３０の孔３３の中
に挿入され、環状のリング部分２５が試験ヘツド
３０の環状の溝３５内の所定位置にスナツプ式に
かん合するまで、インサートのアーム２１の端部
は内方にたわむ。次いで組立体が固く錠止され
る。大腿部ステム１１を引くと、球１４がインサ
ートのアームを外方に押し、従つて環状の溝３５
の中におよびその溝に対し押すように環状のリン
グ部分２５に大きな力を加えるので、組立体を引
出すことはできない。
しかし、組立体は試験ヘツド３０の孔３２に露
出しているベアリングインサート２０の後部の突
出部２２を押すことによつて迅速且つ容易に簡単
に取外すことができる。この作用は環状のリング
部分２５およびインサートのアーム２１を内方に
押込み、その内側の彎曲面は大腿部の球１４の球
面を越えて延び、大腿部補綴１０のネツク部１３
に向つて内方にたわみ、それによつてベアリング
インサート２０が試験ヘツド３０から押出され
る。
本発明の上記の事項は大腿部補綴ステムを備え
たベアリングインサートおよび試験ヘツドを用い
ることに基づいているが、そのような使用は多
分、一般的な処置ではない。移植大腿部補綴の球
は極めて高度に磨かれた外面を有し、その外面は
試験的に取付ける間に偶然かき傷などの傷を付け
られることもあり、高価な補綴を使用不能にする
こともある。そのような傷が付かないようにする
ため、試験ハンドルが通常試験ヘツドの寸法決定
に好都合なように本発明のベアリングインサート
と試検ヘツドに関連して用いられる。試験ハンド
ルは大腿部の補綴と寸法および形状が類似の球で
終り、または次に述べるように、他の設計のもの
でもよい。
第３図に関し説明すると、ハンドル４１はその
一端に固定されたボタン４３とベアリングインサ
ート４４を有し、ステンレス鋼のボルト４６によ
つて互に保持されている。アセタール樹脂のよう
な他の材料を用いることもできるが、典型的には
ステンレス鋼の素材で形成されるボタン４３は軸
線方向に延びる中央の孔を有し且つ一端において
錠止カラー４２を受けるためねじ付のシヤンクが
備えられ且つ他端においてベアリングインサート
４４の球形の孔にかん合する切頭球形の面を備え
ている。ハンドル４１に取付けられたボタン４３
およびベアリングインサート４４の組立体は試験
ヘツド４０およびボタン４３のシヤンクにねじ込
められた錠止カラー４２にスナツプ式にはめ込ま
れ、その組立体を試験ヘツドに錠止する。
ベアリングインサート４４は、後部の突出部２
２を持つ必要がないが、その代り後端においてボ
ルト４６を収めるため孔４５を有し、その孔はボ
ルトを固定し且つボタン４３をハンドル４１に固
定すること以外は、第１図と第２図に示したベア
リングインサート２０にほぼ類似している。
第１図および第２図の大腿部補綴の球１４の代
りに用いられるボタン４３は、半球状の大腿部補
綴の球１４に比し半球より小さい切頭球形面を備
えている。もちろん、ボタン４３の球面は切頭部
を設ける必要はなく、完全な球でよく、切頭部は
単にボタン４３の製作プロセスにおいて便宜上設
けたものであることが理解されよう。ボタン４３
の頂面は半球より小さく且つそれはボタン４９に
よつてベアリングインサート４４に固定されるの
で、組立体が試験ヘツドから自由になるように引
かれ、即ち錠止カラー４２がゆるめられ、試験ハ
ンドル４１、ボタン４３およびベアリングインサ
ート４４が容易且つ迅速に試験ヘツド４０に対し
およびそこからスナツプ式に挿入もしくは取外さ
れるときに、ベアリングインサート４４を試験ヘ
ツド４０の中に錠止しようとする力は存在しな
い。組立体が試験ヘツド４０の中の所定位置にス
ナツプ式にはめ込まれると、錠止カラー４２はベ
アリングインサート４４に対しねじ込められ、ベ
アリングインサートはカム作用によりその環状の
リング部分４７を試験ヘツドの溝４８の中にかた
く押込み、ハンドル４１から試験ヘツド４０が外
れるのを不可能にする。
試験ヘツド４０が脚窩内で適合するかどうかが
試験されると、ハンドル４１を用いて自由に引か
れる。錠止カラーのねじ係合を外せば、試験ヘツ
ド４０は迅速且つ容易にスナツプ式に取外され、
他の寸法の試験ヘツド４０と取換えられ、再び錠
止カラーを締め、そしてプロセスが繰返される。
【図面の簡単な説明】
第１図は本発明の代表的な大腿部ステム補綴、
ベアリングインサートおよび試験ヘツドを示す部
分的に断面で示した分解図、第２図は試験的な挿
入のため組立てられた第１図の要素の部分拡大断
面図、そして第３図は大腿部ステム補綴の代りに
試験ハンドルを用いた本発明の他の実施例の部分
的に断面で示した図である。 図中、１０…大腿部補綴ステム、１４…球、２
０…ベアリングインサート、２１…アーム、２２
…円筒状突出部、２３…球形の孔、２５…環状の
リング部分、３０…試験ヘツド、３３…中央の
孔、３５…環状の溝、４０…試験ヘツド、４１…
試験ハンドル、４２…錠止カラー、４３…ボタ
ン、４４…ベアリングインサート、４７…環状の
リング部分、４８…環状の溝。

Claims (1)

  1. 【特許請求の範囲】 １ 試験ヘツドと、前記試験ヘツド内に取外し可
    能に嵌合するベアリングインサートと、前記ベア
    リングインサートが取外し可能に回転可能に取り
    付けられる球を一端に有する試験ハンドルすなわ
    ち大腿部補綴ステムを含み、前記試験ヘツドは球
    体の一部を除去することによつて形成される平面
    部を有しそれによつて人間の自然の大腿部ヘツド
    に似せ、また該平面部を軸線方向に貫通する中央
    の孔を有するほぼ球形の本体を含み、前記孔は前
    記本体の平面部に隣接して形成された環状の溝を
    有し、前記ベアリングインサートは一端から垂れ
    下がる複数の可撓性のアームと他端を形成する堅
    固な円筒状の突出部を有するほぼ円筒状の本体を
    含み、前記可撓性のアームはそれぞれその自由端
    に隣接した外面に環状のリング部分を有し、この
    リング部分は前記孔の環状の溝とロツク作用を行
    い、前記円筒状の本体および前記可撓性のアーム
    の内面は大腿部の補綴ステムの球を装着する球形
    の空所を形成しており、前記球形の空所は前記大
    腿部補綴ステムの球より大きな球の部分を含み、
    それにより前記可撓性のアームの自由端が前記大
    腿部補綴ステムの前記球の球形表面を越えて延
    び、前記可撓性のアームの自由端が前記ベアリン
    グインサートの堅固な円筒の突出部に圧力を加え
    た際に内側に撓んで前記環状の溝から前記環状の
    リング部分を解放し、それにより前記ベアリング
    インサートおよび取り付けられた大腿部補綴ステ
    ムを異なる寸法の試験ヘツドと取換えるため前記
    試験ヘツドから取外しできることを特徴とする移
    植大腿部補綴用の試験取付装置。 ２ 特許請求の範囲第１項に記載の装置におい
    て、前記試験ヘツドが繰返される蒸気殺菌サイク
    ルに耐えることのできる低摩擦合成有機質の高温
    安定材料で形成されていることを特徴とする移植
    大腿部補綴用の試験取付装置。 ３ 特許請求の範囲第２項に記載の装置におい
    て、前記ベアリングインサートが円筒形の本体を
    含み、前記円筒形の本体はそれからアーム間の材
    料を削除することによつて形成された複数の可撓
    性の垂下したアームを有し、また前記堅固な円筒
    形の突出部が前記円筒形の本体より小径であるこ
    とを特徴とする移植大腿部補綴用の試験取付装
    置。 ４ 特許請求の範囲第３項に記載の装置におい
    て、前記ベアリングインサートが繰返される蒸気
    殺菌サイクルに耐えることのできる低摩擦合成有
    機質の高温安定材料で形成されていることを特徴
    とする移植大腿部補綴用の試験取付装置。 ５ 特許請求の範囲第４項に記載の装置におい
    て、前記大腿部補綴ステムはその一端において前
    記ベアリングインサートが取外し可能に回転可能
    に取り付けられる半球より大きな球部分を有し、
    また前記半球より大きな球部分が挿入される前記
    ベアリングインサート内の球形の空所が前記球部
    分より大きな球形の部分を含む移植大腿部補綴用
    の試験取付装置。 ６ 特許請求の範囲第４項に記載の装置におい
    て、前記試験ハンドルは前記ベアリングインサー
    トが取外し可能に回転可能に装着される半球より
    大きな球部分を一端に有し、また前記半球より大
    きな球部分が挿入される前記ベアリングインサー
    ト内の球形の空所が前記球部分より大きな球形の
    部分を含む移植大腿部補綴用の試験取付装置。 ７ 試験ヘツドと、前記試験ヘツド内に取外し可
    能に嵌合するベアリングインサートと、試験ハン
    ドルと、前記ベアリングインサート内に嵌合する
    球形の表面を備えたボタンを含み、前記ボタンお
    よび前記ベアリングインサートは適当な締結装置
    によつて前記試験ハンドルに取外し可能に取り付
    けられ、前記試験ハンドルは前記ボタンおよび前
    記ベアリングインサートを前記試験ハンドル内に
    ロツクするための、可動に支持されたロツク・カ
    ラーを有し、前記試験ヘツドは球体の一部分を除
    去することにより形成された平面部を有し、それ
    によつて人間の自然の大腿部ヘツドに似せ、また
    該平面部を軸線方向に貫通する中央の孔を有する
    ほぼ球形の本体を含み、前記孔は前記本体の平面
    部に隣接して形成された環状の溝を有し、前記ベ
    アリングインサートはそこから垂れ下がる複数の
    可撓性のアームおよび貫通する中央の孔を有する
    ほぼ円筒状の本体を含み、前記可撓性のアームは
    それぞれ前記孔の環状の溝とくさび作用を行うた
    めの環状のリング部分をその自由端に隣接した外
    側の面に有し、前記ボタンは軸線方向に貫通する
    中央の孔、一端にあるねじ付シヤンクおよび他端
    にある半球より小さい表面を有し、前記円筒状の
    本体および前記可撓性のアームの内面は前記ボタ
    ンの半球面が嵌合する球形の空所に形成されてお
    り、前記球形の空所は前記試験ハンドルの前記ロ
    ツク・カラーをゆるめたときに前記可撓性のアー
    ムの自由端を内方にたわませて前記環状のリング
    部分を前記環状の溝から解放し、それにより試験
    ハンドルとベアリングインサートおよびボタンを
    前記試験ヘツドから取り外して異なつた寸法の試
    験ヘツドと取り換えるのを可能にすることを特徴
    とする移植大腿部補綴用の試験取付装置。
JP8889278A 1977-07-21 1978-07-20 Testing device for mounting grafted femoral prosthetics Granted JPS5422994A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/817,551 US4135517A (en) 1977-07-21 1977-07-21 Femoral prosthesis trial fitting device

Publications (2)

Publication Number Publication Date
JPS5422994A JPS5422994A (en) 1979-02-21
JPS628178B2 true JPS628178B2 (ja) 1987-02-21

Family

ID=25223337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8889278A Granted JPS5422994A (en) 1977-07-21 1978-07-20 Testing device for mounting grafted femoral prosthetics

Country Status (9)

Country Link
US (1) US4135517A (ja)
JP (1) JPS5422994A (ja)
AU (1) AU521866B2 (ja)
CA (1) CA1118957A (ja)
CH (1) CH638093A5 (ja)
DE (1) DE2826690A1 (ja)
FR (1) FR2397828A1 (ja)
GB (1) GB2001247B (ja)
SU (1) SU841571A3 (ja)

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CA1118957A (en) 1982-03-02
CH638093A5 (de) 1983-09-15
JPS5422994A (en) 1979-02-21
US4135517A (en) 1979-01-23
AU3819678A (en) 1980-01-24
FR2397828A1 (fr) 1979-02-16
GB2001247A (en) 1979-01-31
DE2826690C2 (ja) 1987-11-19
AU521866B2 (en) 1982-05-06
SU841571A3 (ru) 1981-06-23
DE2826690A1 (de) 1979-02-01
FR2397828B1 (ja) 1981-01-09
GB2001247B (en) 1982-02-10

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