JP2002291779A - 膝義足 - Google Patents
膝義足Info
- Publication number
- JP2002291779A JP2002291779A JP2002019296A JP2002019296A JP2002291779A JP 2002291779 A JP2002291779 A JP 2002291779A JP 2002019296 A JP2002019296 A JP 2002019296A JP 2002019296 A JP2002019296 A JP 2002019296A JP 2002291779 A JP2002291779 A JP 2002291779A
- Authority
- JP
- Japan
- Prior art keywords
- angle
- condyle
- knee prosthesis
- prosthesis according
- central part
- 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.)
- Granted
Links
- 210000003127 knee Anatomy 0.000 title claims abstract description 24
- 210000002414 leg Anatomy 0.000 title abstract 3
- 210000004417 patella Anatomy 0.000 claims abstract description 17
- 230000001154 acute effect Effects 0.000 claims abstract description 11
- 239000002639 bone cement Substances 0.000 claims description 11
- 238000002271 resection Methods 0.000 claims description 8
- 210000000689 upper leg Anatomy 0.000 claims description 7
- 230000008468 bone growth Effects 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims 2
- 238000000576 coating method Methods 0.000 claims 2
- 229910052588 hydroxylapatite Inorganic materials 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 13
- 210000001694 thigh bone Anatomy 0.000 abstract 2
- 210000003041 ligament Anatomy 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 210000000629 knee joint Anatomy 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 210000003141 lower extremity Anatomy 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000002303 tibia Anatomy 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
Classifications
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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
- A61F2/38—Joints for elbows or knees
-
- A—HUMAN NECESSITIES
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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
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3859—Femoral components
-
- A—HUMAN NECESSITIES
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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
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
-
- A—HUMAN NECESSITIES
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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
- 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
- A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
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- A—HUMAN NECESSITIES
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- 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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- 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
- A61F2002/30492—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking pin
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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
- 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
-
- A—HUMAN NECESSITIES
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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
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
- A61F2002/30688—Means for allowing passage or sliding of tendons or ligaments
-
- A—HUMAN NECESSITIES
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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
- 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
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30777—Oblong apertures
-
- 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
- A61F2002/30795—Blind bores, e.g. of circular cross-section
- A61F2002/30805—Recesses of comparatively large area with respect to their low depth
-
- 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
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- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30891—Plurality of protrusions
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-
- A—HUMAN NECESSITIES
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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
- 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
- A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
-
- 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
- A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
-
- 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
- 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
- A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00952—Coating, pre-coating or prosthesis-covering structure made of bone cement, e.g. pre-applied PMMA cement mantle
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Physical Education & Sports Medicine (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
- Materials For Medical Uses (AREA)
- Surgical Instruments (AREA)
Abstract
態の膝義足を提供すること。 【解決手段】 本発明による膝義足の大腿骨部が示され
ており、これは、大腿骨断端(1)に対する接触面(4
a、5a、6a、6b、7b、8a、9a、10a、1
1a、11b、12a、12b、13b)を有する中心
部(2)および顆部(3)を有するものであり、中心部
(2)は、膝蓋骨(19)用ガイド面(20)と互いに
鋭角α≦90°をなす外部接触面(4a、5a)とを有
し、一方、顆部(3)は、関節接合運動用の滑動面(2
7、28)と互いに鋭角β≦90°をなす外部接触面
(6b、7b)とを有する。中央部(2)および顆部
(3)は、より大きい屈曲を可能にするために、互いに
対して回動された押付け方向に互いに別々に大腿骨断端
に押し付けることができるが、このとき角度βの中心線
は、角度αの中心線に対して15°≦γ≦60°の角度
にわたって回動する。
Description
くとも1つの顆用のガイド面を有し、α≦90°の鋭角
で外部接触面を有する大腿骨部であって、その接触面
を、角度αの旋回範囲で直線に沿って大腿骨断端の切除
面に押し付けることが可能な大腿骨部を有する膝義足に
関する。
の、予め加工された大腿骨に、顆を押し付けて固定する
ことが、これまで普通に行われてきた。このため大腿骨
断端は、本来の顆の領域が人工顆部の接触面の形状に形
成され、後で人工顆部を固定することができるようにし
ている。実際の固定は、接触面でスピゴットを突出させ
ることによって、対向する外部接触面の楔止めによっ
て、及び/又は骨セメントを使用した接触面の固定によ
って、行うことができる。顆は、半月部またはプラット
ホームに接触し、膝関節の関節接合中、その支持面上
で、それぞれプラットフォームまたは脛骨に対して屈曲
角δの範囲内で旋回することができる。
示されているが、この人工膝関節では、靭帯の状態によ
るが、関節接合中に顆を幾分効果的に横方向に案内する
ことも可能である。
方に配置された膝蓋骨用のガイド面があり、プラットホ
ームに対して90°程度ずれている膝蓋骨は、屈曲中、
義肢の上半分にあるそれ自体のガイド面上を滑動する。
義肢の上半分の接触面は、最上部に向かって「U」字形
をした開口を形成し、伸展の際、膝蓋骨が前肢に接触す
ると共にプラットホームがこの「U」字形の底部に接触
するのに対し、屈曲中は、その底部が膝蓋骨の下で回転
すると共に後肢がプラットホームに対して回転する。屈
曲中、前方からの膝蓋骨からの力と後方からの力の両方
が大腿骨断端で生じるが、これらの力は、互いにほぼ直
角をなす対向する切除面に吸収される。義肢の最上部で
は、関連する外部接触面が互いに対して小さい角度をな
し、その結果、押し付けられるときの楔止め作用によっ
て、義肢断端に対して締まりばめが実現される。このよ
うな義肢で得ることができる屈曲角は、アジアの国々に
住む多くの人々にとって不十分である。アジアの人々
は、より大きい屈曲角を要する生活習慣の中で生まれた
ときから生活しており、膝義足の屈曲角がその生活に適
さなくなるからである。
手によって大きい屈曲角が可能な設計形態を提供するこ
とである。この目的は、膝蓋骨および顆部用のガイド面
を備えた中心部であって、そこから別々に押し付けるこ
とができ、鋭角β≦90°で外部接触面を有し、この角
度βの旋回範囲で直線に沿って大腿骨断端の切除面に押
し付けることが可能な中心部を大腿骨部が有し、より大
きい屈曲を可能にするために、顆部の角度βの中心線
が、中心部の角度αの中心線に対して角度15°≦γ≦
60°にわたって旋回することで満たされる。
ても、義肢の上部によって義肢断端に伝達される力が圧
縮力である点にある。接触面と切除面との間には、押付
け方向と逆の方向には剪断応力が生じない。義肢の上部
は中心部と顆部に分割され、その分割接合部は膝蓋骨用
ガイド面が中心部に配置されるように延在するので、ま
た支持面が顆部上にプラットホームに対して配置される
ので、これらの面は、互いに独立に形成することがで
き、互いに独立に旋回する押付け方向に、互いに独立に
大腿骨断端に押し付けることができる。中心部と顆部の
接触面は、押込み方向が異なるにもかかわらず、1つの
切除面に一緒に接触させることができる。押込み方向
は、大きい屈曲角δを可能にするために、例えば15°
から60°の間の角度γの範囲で回動する。120°よ
りも大きい屈曲角δ、例えば160°が可能である。顆
は、ヨークで接続することができ、または個々に形成す
ることができる。顆は、押し付けるときに、切除面によ
って中心部に対し位置合わせをするが、これは大腿骨断
端を介して行われる。さらに、本来の膝関節と同様の、
大腿骨断端での膝蓋骨およびプラットホームの力の作用
点を得るために、中心部と顆部とを矢状面内で互いに対
して移動可能に案内することができる。しかし、押込み
状態で、結合部材を用いることにより、中心部と顆部を
接続する可能性も存在する。
的として最小限の量の骨セメントを導入するために、ポ
ケットを有することができる。個々の接触区域、特に外
部接触区域は、主要な固着を行うための鋸歯形固着構造
を有することができる。同様に、押込み方向に延在して
その押込み方向にボアが設けられている個々のスピゴッ
トによって、主要な固着を改善することができる。骨セ
メントで濡れていない接触面は、骨成長を促進させる層
で被覆することができる。
進剤で被覆することができる。そのような層は、例えば
チタナルアルコラートやアルコキシシランで作製するこ
とができる。
方向の撓みを可能にするために、係合している顆の曲率
半径を連続的にまたは段階的に小さくすることができ
る。
述する。
有する膝義足の大腿骨部であって、切除された大腿骨断
端1に対する接触面4a、5a、6a、6b、7b、8
a、9a、10a、11a、11b、12a、12b、
13bを備えたものが示されており、この中心部2は、
膝蓋骨19用のガイド面20と、互いに鋭角α≦90°
をなす外部接触面4a、5aとを有し、一方、顆部3
は、関節接合運動用の滑動面27、28と、互いに鋭角
β≦90°をなす外部接触面6b、7bとを有してい
る。中心部2および顆部3は、より大きい屈曲が可能に
なるように、互いに対して回動した押付け方向に互いに
別々に大腿骨断端に押し付けることができ、このとき角
度βの中心線は角度αの中心線に対して角度15°≦γ
≦60°だけ回動する。
照符号を使用する。
領域に切除区域4、6、11、12、13、7が設けら
れ、顆と顆の間の領域に切除区域4、8、9、10、5
が設けられている。切除区域4および5と、これらに接
触する中心部2の外部接触面4a、5aは、鋭角をなし
て互いにほぼ平行である。中心部の接触面8a、9a、
10aは顆と顆の間に支持され、その他の接触面6a、
11a、12aは先の本来の顆領域の切除区域上に支持
されるが、この場合、これらの切除区域は顆部3の接触
面6b、11b、12bにも覆われて、顆と顆の間の溝
に対するセンタリングが行われるようになり、かつ完全
に屈曲したときに膝蓋骨19用ガイド面20も支持する
ようになる。
から押し付けることができ、一方、その押付け方向と角
度βの中心線16は45°の角度γにわたって回動し、
それによって、屈曲角δがより大きい場合、例えばδ>
120°であっても外部接触面7bが生成され、その接
触力によって区域7bが断端に押し付けられ、または最
大でも区域7bに垂直になるように押し付けられる。図
3からわかるように、顆部3の滑動面27と半月部18
の滑動面18は、同じ曲率半径R1を有する。
8、図9に示す。この場合も、膝蓋骨19用ガイド面2
0と滑動面27、28は、屈曲角度が増大するので屈曲
方向に延在しなければならない。中心部2は、接触面4
a、6a、8a、11a、5aと、側方センタリング面
31を有する。顆部3は、実際の顆を接続するヨーク1
4を有する。膝蓋骨19用ガイド面20と顆の滑動面2
7、28が妨げられないように、中心部2と顆部3の間
には分離接合部25が配置されている(図8、図9)。
十字靭帯には凹部24が設けられる。接触面4a、6
a、8a、11aの一部には、押し付ける間に骨セメン
トが充填されるポケット17があり、それによって、あ
る領域での骨セメントの層の厚さを最小限にすることが
できる。ポケット17と接触面は、接着剤および骨セメ
ントの薄い層で、予め結合することもできる。
は、中心線15の方向に大まかに行わなければならず、
より小さい鋭角βを有する顆部では、押出し方向が角度
βの中心線から大きくずれる可能性がある。この場合、
押付け方向は角度β以内でなければならず、スピゴット
23の方向によって決定される。図5および図7で、母
線により、顆の滑動面27、28の輪郭を示す。屈曲が
大きくなるにつれて、滑動面27、28の曲率半径R1
は、より小さい曲率半径R2へと変化する。
けられた後にピン32の形をした結合片に接続すること
ができるよう、ボア22を有している。同時に大腿骨断
端は、180°よりも大きい包絡角で接触面に取り囲ま
れるので、この接続によって捕捉される。
の面4aと5aのように互いに非常に鋭い角度をなす外
部接触面の場合、この面に鋸歯を設けることによって、
良好な主要な固着を可能にすると共に顆部3が同様に押
し付けられるまで中心部2を固定することに、意味があ
ると考えられることを示している。
構成を示すが、滑動面27、28を有する2つの別個の
顆部3は、押し付けることができ、ボア22を介して結
合片、例えばピンやねじによって中心部2に接続するこ
とができる。膝の十字靭帯が許すなら、これらの2つの
顆部3は側面からも導入することができる。これらの顆
部3は、その場合、ジャーナル23がどのくらいの長さ
であるかに応じてジャーナルの押付け方向で顆部3が固
着されていることを見出すために、固定された状態でヨ
ークに接続されていないからである。顆部3が中心部2
に接続されるとすぐに、大腿骨断端もこのとき180°
を超える包絡角で取り囲まれ、危険を伴わずに120°
よりも大きい屈曲角度が可能になる。
略図である。
けることが可能な中心部の概略図である。
回した中心線に沿って押し付けることが可能な、顆部の
概略図である。
である。
略図である。
図である。
有する中心部の概略図である。
度から見た概略図である。
有する外部接触面の拡大断面図である。
Claims (14)
- 【請求項1】 膝蓋骨(19)および少なくとも1つの
顆(18)用のガイド面(20)を有し、鋭角α≦90
°で外部接触面(4a、5a)を有し、その接触面を、
角度αの旋回範囲で直線に沿って大腿骨(1)断端の切
除区域(4、5、6、8、9、10、11、12)に押
し付けることができる大腿骨部を有する膝義足であっ
て、大腿骨部が、別々に押し付けることが可能な膝蓋骨
(19)用ガイド面(20)を有する中央部(2)と顆
部(3)とを有し、顆部(3)が、鋭角β≦90°で外
部接触面(6b、7b)を有し、角度βの旋回範囲で直
線に沿って大腿骨断端の切除区域(6、7、11、1
2、13)に押し付けることができ、このとき顆部
(3)の角度βの中心線(16)が、より大きい屈曲が
可能になるように、中心部(2)の角度αの中心線(1
5)に対して15°≦γ≦60°の角度にわたって旋回
することを特徴とする膝義足。 - 【請求項2】 顆部(3)が、120°よりも大きい屈
曲角δを有することを特徴とする請求項1に記載の膝義
足。 - 【請求項3】 顆部(3)が、中心部(2)に対してそ
れぞれ外側に配置されてヨーク(14)を介して接続さ
れた、2つの顆(3)を有することを特徴とする請求項
1または請求項2に記載の膝義足。 - 【請求項4】 中心部(2)および顆部(3)が、結合
部材(21)により、押付け状態で互いに接続可能であ
ることを特徴とする請求項1から請求項3までのいずれ
か一項に記載の膝義足。 - 【請求項5】 結合部材(21)が、分離面に横方向に
挿通されたピンから、または横方向通しねじ接続からな
ることを特徴とする請求項4に記載の膝義足。 - 【請求項6】 角度γが40°から50°の間であるこ
とを特徴とする請求項1から請求項5までのいずれか一
項に記載の膝義足。 - 【請求項7】 骨セメントでの固定用に最小限の量の骨
セメントを導入するため、個々の接触面(4a、5a、
6a、6b、7b、8a、9a、10a、11a、11
b、12a、12b、13b)がポケット(17)を有
することを特徴とする請求項1から請求項6までのいず
れか一項に記載の膝義足。 - 【請求項8】 個々の接触面(4a、5a、6a、6
b、7b、8a、9a、10a、11a、11b、12
a、12b、13b)が、主要な固着を行うために鋸歯
形固着構造(30)を有することを特徴とする請求項1
から請求項6までに記載の膝義足。 - 【請求項9】 個々の接触面(4a、5a、6a、6
b、7b、8a、9a、10a、11a、11b、12
a、12b、13b)が、骨成長を促進させ、または骨
セメントの接着性を高める被覆で覆われていることを特
徴とする請求項1から請求項6までのいずれか一項に記
載の膝義足。 - 【請求項10】 被覆が、ヒドロキシルアパタイトなど
の物質を含有し、またはチタナルアルコラートおよびア
ルコキシシランで構成されていることを特徴とする請求
項9に記載の膝義足。 - 【請求項11】 顆(3)の曲率半径R1が、伸展の移
行から完全屈曲にいたる接触領域で少なくとも1回小さ
くなることを特徴とする請求項1から請求項10までの
いずれか一項に記載の膝義足。 - 【請求項12】 角度αまたはβが10°よりも小さい
ことを特徴とする請求項1から請求項11までのいずれ
か一項に記載の膝義足。 - 【請求項13】 角度αまたはβが5°よりも小さいこ
とを特徴とする請求項1から請求項11までのいずれか
一項に記載の膝義足。 - 【請求項14】 スピゴット(23)が押付け方向で接
触面(12b)に取り付けられて、センタリングおよび
主要な固着が容易にされることを特徴とする請求項1か
ら請求項13のいずれか一項に記載の膝義足。
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EP01810301 | 2001-03-26 |
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EP (1) | EP1245204B1 (ja) |
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KR (1) | KR100628446B1 (ja) |
CN (1) | CN1236738C (ja) |
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- 2001-12-07 ES ES01811196T patent/ES2278716T3/es not_active Expired - Lifetime
- 2001-12-27 KR KR1020010085865A patent/KR100628446B1/ko not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
EP1245204A3 (de) | 2004-01-14 |
CN1376450A (zh) | 2002-10-30 |
ATE353200T1 (de) | 2007-02-15 |
DE50112004D1 (de) | 2007-03-22 |
JP3738221B2 (ja) | 2006-01-25 |
EP1245204B1 (de) | 2007-02-07 |
EP1245204A2 (de) | 2002-10-02 |
US20020138150A1 (en) | 2002-09-26 |
CN1236738C (zh) | 2006-01-18 |
KR20020076112A (ko) | 2002-10-09 |
ES2278716T3 (es) | 2007-08-16 |
KR100628446B1 (ko) | 2006-09-26 |
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