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JP4015828B2 - Implant member for femoral osteosynthesis - Google Patents

Implant member for femoral osteosynthesis Download PDF

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Publication number
JP4015828B2
JP4015828B2 JP2001215439A JP2001215439A JP4015828B2 JP 4015828 B2 JP4015828 B2 JP 4015828B2 JP 2001215439 A JP2001215439 A JP 2001215439A JP 2001215439 A JP2001215439 A JP 2001215439A JP 4015828 B2 JP4015828 B2 JP 4015828B2
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head
shaft
plate
femoral
end portion
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JP2003024344A (en
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順二 伊藤
憲司 土居
▲吉▼雄 難波
威知郎 中山
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Kobe Steel Ltd
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Kobe Steel Ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
    • A61B17/748—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck with means for adapting the angle between the longitudinal elements and the shaft axis of the femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
    • A61B17/746—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to a plate opposite the femoral head

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
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  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、大腿骨骨頭近傍を骨折した際の治療において、骨の固定治療用として用いるインプラント部材に関するものである。
【０００２】
【従来の技術】
従来から、大きな荷重のかかる大腿骨骨頭近傍には骨折が多く発生することから、骨頭用軸部材とプレートが「く」の字状に連結されたインプラント部材を用い、骨折した骨を所望の形状に保持する治療が行われている。
【０００３】
図４は、骨折した大腿骨骨頭近傍にインプラント部材を取り付けた状態を説明する断面図であり、大腿骨骨頭部１５と大腿骨骨幹部１６が大腿骨頚部１８で骨折している場合である。このように骨折した大腿骨に対して、骨頭用軸部材１０が骨頭部１５に挿設され、この骨頭用軸部材１０に連結したプレート１１がネジ部材１３によって骨幹部１６に沿って固定されて、頚部１８を連結固定している（従来例１）。
【０００４】
なお、上記従来例１のインプラント部材は、骨頭用軸部材１０とプレート１１のなす角度が固定されているが、大腿骨の骨頭部と骨幹部とのなす角度は個人差があり、このため、種々の角度のインプラント部材を準備する必要があった。そこで、骨頭用軸部材とプレートのなす角度を可変式としたインプラント部材が種々提案されている（例えば、特表平７−５０９６２１号、アメリカ特許３５５４１９３号、特開平１０−５２４３８号など）。
【０００５】
なかでも、本発明者らが特開平１０−５２４３８号に開示したインプラント部材は、図５に示すように、骨頭用軸部材の一部を構成する大腿骨チューブ３２とプレート１１とが、互いのなす角度が変化できるように連結軸３４を介して連結されており、図６（ａ）〜（ｃ）に示すように、第１作動部材３５（雄ネジ３５ｂ）を回転操作して第２作動部材３６（雌ネジ３６ｂ、凸部３６ａ）を移動させ、この移動により凹部３６ｃが移動し、大腿骨チューブ３２が連結軸３４回りに回転し、上記角度（連結角度）が変化するように構成されているので、手術中に連結角度の微調整ができ、かつ骨外に張り出す部分が小さいため出血が少ないなど患者の負担が軽減でき、しかも手術後骨頭部にかかる大きな荷重に抵抗することができる優れたインプラント部材である（従来例２）。
【０００６】
しかしながら、近年骨頭部と骨幹部とのなす角度のみならず、骨頭部および骨幹部自身の大きさ・形状の個人差に適応できるインプラントへの要望が高まっており、上記従来例２の角度可変のインプラント部材を用いた場合であっても、手術時に複数個のインプラント部材を準備する必要があった。
【０００７】
【発明が解決しようとする課題】
そこで本発明の課題は、多種多様な患者に低コストで適用できるインプラント部材を提供することにあり、具体的には、骨頭部と骨幹部とのなす角度のみならず、骨頭部および骨幹部自身の大きさ・形状や、骨折の部位・程度が異なる場合にも、個々の患者に最も適合したサイズ・形状のインプラント部材を提供することである。
【０００８】
【課題を解決するための手段】
請求項１の発明は、大腿骨骨頭部に埋設される骨頭用軸部材と、この骨頭用軸部材の下端部に接続され大腿骨骨幹部外表面に沿って固定されるプレートとを備え、前記プレートの上端部と前記骨頭用軸部材の下端部とが、互いのなす角度が変化できるように連結手段を介して連結され、この連結部には角度調整手段が設けられているインプラント部材において、前記角度調整手段が、前記骨頭用軸部材の下端部と前記プレートの上端部のいずれか一方の部材には前記連結手段としての連結軸が一体に接合され、他方の部材にはこの連結軸を出し入れできる開放部を有する軸受け部が形成され、前記連結軸が前記軸受け部で回転自在に支持され、さらに前記軸受け部の内面へ貫通する雌ネジを有するボルト穴が形成され、この雌ネジに螺合する雄ネジを有する固定ボルトが備えられ、この固定ボルトが締め込まれたとき、その先端が前記開放部側に突き出るとともに前記連結軸を前記軸受け部に押し付けて固定するように構成されていることを特徴とする大腿骨骨接合用インプラント部材である。
【０００９】
本発明によれば、簡単な構造でプレートと骨頭用軸部材とを着脱自在に構成したことから、骨頭部および骨幹部自身の大きさ・形状に個人差があっても、あるいは骨折の部位・程度が個々のケースで異なっても、プレートまたは骨頭用軸部材を適宜取り替えて個々の患者に最も適合した組合せのものとすることができる。しかもプレートと骨頭用軸部材とを連結したときには、従来例２のインプラント部材と同様、個人差のある骨頭部と骨幹部とのなす角度に応じて手術中にプレートと骨頭用軸部材とのなす角度を自由に調整でき、そして任意の角度で固定ができる。
【００１０】
【発明の実施の形態】
以下、本発明に係る大腿骨骨接合用インプラント部材の実施の形態について図面を参照しながら詳細に説明する。図１および２は請求項１の発明の実施の一態様である骨頭用軸部材とプレートとが着脱自在でかつ骨頭用軸部材とプレートとのなす角度が可変式のインプラント部材を説明する図であり、図１は各構成部分の関係を示す矢視図、図２は角度調整手段の構造を説明する断面図である。
【００１１】
本実施の形態のインプラント部材は、生体に埋設されることからすべて生体適合性材料、例えばチタン合金などで構成され、図１に示すように、先端にネジ部を有するラグスクリュー３３と、このラグスクリュー３３の下端が挿入される大腿骨チューブ３２により骨頭用軸部材１０が構成され、プレート１１の上端部と大腿骨チューブ３２の下端部とが、互いのなす角度が変化できるように、角度調整手段２０を介して「く」の字状に接続されている。
【００１２】
角度調整手段２０は、図２に示すように構成されている。すなわち、大腿骨チューブ３２の下端部に連結軸１２３を結合して大腿骨チューブ３２と連結軸１２３とが一体に回転できるようにするとともに、プレート１１上端部に、連結軸が自由に出入りできる開放部１２４ａを有する軸受け部１２４を形成して連結軸１２３を回転自在に支持する構造とし、さらに、軸受け部１２４内面まで貫通する雌ネジのボルト穴１２５を形成し、このボルト穴１２５に嵌合する固定ボルト１２５ａをねじ込んだとき、固定ボルト１２５ａの先端部１２５ｂが軸受け部１２４の開放部１２４ａ側に突き出るとともに連結軸１２３を軸受け部１２４内面に押し付けて摩擦力で固定できるように構成されている。なお、本実施の形態と逆に、大腿骨チューブ３２下端部に軸受け部１２４を形成し、プレート１１上端部に連結軸１２３を結合しても同じ作用効果が得られる。
【００１３】
図１のインプラント部材を大腿骨の骨折に用いた例を図３により説明する。図３に示すように、頚部１８に骨折が生じている場合を想定する。大腿骨チューブ３２下端部に結合された連結軸１２３をプレート１１上端部に形成された軸受け部１２４にその開放部１２４ａから嵌め込み、次いで連結軸１２３が軸受け部１２４内を手指などにより自由に回転できるが外れない程度に固定ボルト１２５ａを軽く締め込んでおく。そして、骨幹部１６から骨折により分離した骨頭部１５を骨幹部１６に押し付けておき、所定の角度でドリル及びタップを用いて穿孔し、その孔に大腿骨チューブ３２に嵌め込んだラグスクリュー３３を挿入し骨頭部１５にねじ込む。ラグスクリュー３３を完全に締め込む前にプレート１１を手指などにより動かしてその角度を調節し、プレート１１が骨幹部１６表面と平行になったのを確認した後、固定ボルト１２５ａを完全に締め込んで大腿骨チューブ３２とプレート１１とのなす角度を固定し、次いでラグスクリュー３３を完全に締め込んでプレート１１を骨幹部１６表面に密着させ、プレート１１に予め形成されているネジ嵌合孔１４を通してコーティカルスクリュー（ネジ部材１３）を骨幹部１６にネジ込みプレート１１を骨幹部１６表面に沿って固定する。
【００１４】
なお、骨頭用軸部材１０は図１に示す大腿骨チューブ３２とラグスクリュー３３の組合せのみに限定されるものではなく、大腿骨チューブの替わりに、図７〜９に示すような種々の形態のラグスクリュー固定部材１３２を用いることもできる。ラグスクリュー固定部材１３２の形態は個々の患者に最も適合するものを選択できるよう横広形状のもの（図７）、三角形状のもの（図８）、四角形状のもの（図９）などを準備しておくことが好ましい。これらのラグスクリュー固定部材１３２と対で使用されるラグスクリューの本数は必ずしも１本に限られるものではなく、個々の患者に応じて複数本用いることが望ましい場合もあり、例えば図８および図９に示すように、ラグスクリュー固定部材１３２にラグスクリュー係合孔１３３をそれぞれ２個および３個設け、複数本のラグスクリューをこの係合孔１３３を通して骨頭部にねじ込んで固定することができるようにしておくことも好ましい。
【００１５】
このように本発明（請求項１）のインプラント部材を用いることにより、従来例２の角度可変であるが大腿骨チューブとプレートとが一体型のインプラント部材を用いた場合と同じくプレートの骨幹部からの浮き上がりを防止できることに加え、手術に際して大腿骨チューブ（またはラグスクリュー固定部材）とプレートとを適宜組み合わせることができるので、従来例２に比べ、個々の患者に最も適合したサイズ・形状のインプラント部材を用いることができる。
【００１６】
【発明の効果】
本発明（請求項１）によれば、プレートと骨頭用軸部材が、互いのなす角度が変化できるように連結手段を介して連結され、かつ、簡単な構造でプレートと骨頭用軸部材とを着脱自在に構成したことから、骨頭部および骨幹部自身の大きさ・形状に個人差があっても、あるいは骨折の部位・程度が個々のケースで異なっても、プレートまたは骨頭用軸部材を適宜取り替えて個々の患者に最も適合した組合せのものとすることができることに加え、個人差のある骨頭部と骨幹部とのなす角度に応じて手術中にプレートと骨頭用軸部材とのなす角度を自由に調整でき、そして任意の角度で固定ができる。
【図面の簡単な説明】
【図１】 本発明（請求項１）のインプラント部材の各構成部分の関係を示す矢視図である。
【図２】 本発明（請求項１）のインプラント部材の角度調整手段の断面図である。
【図３】 本発明（請求項１）のインプラント部材を大腿骨に取り付けた様子を表す断面図である。
【図４】 従来例１のインプラント部材を大腿骨に取り付けた様子を表す断面図である。
【図５】 従来例２のインプラント部材を示す正面図である。
【図６】 従来例２のインプラント部材を構成する角度調整手段を示す、（ａ）は図５のＢＢ断面図、（ｂ）及び（ｃ）は図６（ａ）のＣＣ断面図である。
【図７】 ラグスクリュー固定部材の形態の一例を示す、（ａ）は正面図、（ｂ）は側面図、（ｃ）は平面図である。
【図８】 ラグスクリュー固定部材の別の形態の一例を示す、（ａ）は正面図、（ｂ）は側面図、（ｃ）は平面図である。
【図９】 ラグスクリュー固定部材の別の形態の一例を示す、（ａ）は正面図、（ｂ）は側面図、（ｃ）は平面図である。
【符号の説明】
１０…骨頭用軸部材、１１…プレート、１３…ネジ部材（キャンセラススクリュー）、１４…ネジ係合孔（スクリューホール）、１５…大腿骨骨頭部、１６…大腿骨骨幹部、１７…大転子部、１８…大腿骨頚部、２０…角度調整手段（アジャスタブルユニット）、３２…大腿骨チューブ、３３…ラグスクリュー、３４…連結軸、３５…第１作動部材、３５ａ…摘み部（角度調節ネジ）、３５ｂ…雄ネジ、３６…第２作動部材、３６ａ…凸部、３６ｂ…雌ネジ、３６ｃ…凹部、１２３…連結軸、１２４…軸受け部、１２４ａ…開放部、１２５…ボルト穴、１２５ａ…固定ボルト、１２５ｂ…先端部、１３２…ラグスクリュー固定部材、１３３…ラグスクリュー係合孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an implant member used for bone fixation treatment in a treatment when a bone near the femoral head is fractured.
[0002]
[Prior art]
Conventionally, many fractures occur near the femoral head where a large load is applied. Therefore, the fractured bone is formed into a desired shape by using an implant member in which the shaft member for the head of the head and the plate are connected in a "<" shape. The treatment to be held is done.
[0003]
FIG. 4 is a cross-sectional view for explaining a state in which an implant member is attached in the vicinity of the fractured femoral head, in which the femoral head 15 and the femoral shaft 16 are fractured at the femoral neck 18. The head member 10 is inserted into the head 15 of the fractured femur, and the plate 11 connected to the head member 10 is fixed along the diaphysis 16 by the screw member 13. The neck 18 is connected and fixed (conventional example 1).
[0004]
In the implant member of the above-described conventional example 1, the angle formed by the shaft member 10 for the head of the head and the plate 11 is fixed, but the angle formed by the bone head of the femur and the diaphysis has individual differences. There was a need to prepare implant members of various angles. Accordingly, various implant members have been proposed in which the angle formed between the bone head shaft member and the plate is variable (for example, JP 7-509621, US Pat. No. 3,554,193, JP 10-52438, etc.).
[0005]
Among them, the implant member which the present inventors have disclosed in JP-A-10-52438, as shown in FIG. 5, and the femur tube 32 and the plate 11 which constitutes a part of the femoral head for shaft member, to each other angle are connected via a connecting shaft 34 so that it can be changed, as shown in FIG. 6 (a) ~ (c) , the second actuated first operating member 35 (the male screw 35b) rotationally operated The member 36 (female screw 36b, convex portion 36a) is moved, and by this movement, the concave portion 36c is moved, and the femoral tube 32 rotates around the connecting shaft 34, so that the angle (the connecting angle) changes. Therefore, it is possible to finely adjust the connection angle during the operation, reduce the burden on the patient such as less bleeding because the portion protruding outside the bone is small, and resist the large load on the bone head after the operation Excellent Inn that can It is a plant member (conventional example 2).
[0006]
However, in recent years, there has been a growing demand for implants that can be adapted to individual differences in the size and shape of the bone head and the diaphysis as well as the angle formed between the bone head and the diaphysis. Even when an implant member is used, it is necessary to prepare a plurality of implant members at the time of surgery.
[0007]
[Problems to be solved by the invention]
Accordingly, an object of the present invention is to provide an implant member that can be applied to a wide variety of patients at a low cost. Specifically, the present invention provides not only an angle between a bone head and a diaphysis but also a bone head and a diaphysis. of, size and shape itself, if the site-degree of fracture varies is the child provide an implant member of best fit size and shape to the individual patient.
[0008]
[Means for Solving the Problems]
The invention of claim 1 comprises a shaft member for the head of the head embedded in the femoral head, and a plate connected to the lower end of the shaft member for the head and fixed along the outer surface of the femoral shaft. In the implant member in which the upper end portion of the plate and the lower end portion of the shaft member for the head are connected via a connecting means so that the angle formed by each other can be changed, and the angle adjusting means is provided in the connecting portion. The angle adjusting means is configured such that a connecting shaft as the connecting means is integrally joined to one of the lower end portion of the bone head shaft member and the upper end portion of the plate, and the connecting shaft is connected to the other member. A bearing portion having an openable portion that can be taken in and out is formed, the connecting shaft is rotatably supported by the bearing portion, and a bolt hole having a female screw penetrating the inner surface of the bearing portion is formed. Combine Fixing bolt having a screw is provided, when the fixing bolt is tightened, characterized in that it is configured with the connecting shaft to secure against the said bearing portion with its tip end protrudes into the open side It is an implant member for femoral osteosynthesis.
[0009]
According to the present invention , since the plate and the shaft member for the head of bone are detachably configured with a simple structure, even if there are individual differences in the size and shape of the bone head and the bone shaft itself, Even if the degree is different in each case, the plate or head shaft member can be replaced as appropriate to obtain a combination that best suits the individual patient. In addition, when the plate and the shaft member for the head of the bone are connected, the plate and the shaft member for the head of the head are formed during the operation according to the angle formed by the bone head and the diaphysis of the individual, as in the case of the implant member of Conventional Example 2. The angle can be adjusted freely and can be fixed at any angle .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of an implant member for femoral osteosynthesis according to the present invention will be described in detail with reference to the drawings. 1 and 2 are views for explaining an implant member according to an embodiment of the invention of claim 1 in which the head member and the plate are detachable and the angle between the head member and the plate is variable. FIG. 1 is an arrow view showing the relationship between the components, and FIG. 2 is a cross-sectional view for explaining the structure of the angle adjusting means.
[0011]
Since the implant member according to the present embodiment is embedded in a living body, the implant member is entirely composed of a biocompatible material, for example, a titanium alloy. As shown in FIG. 1, a lag screw 33 having a screw portion at the tip, and the lug The femoral head shaft member 10 is constituted by the femoral tube 32 into which the lower end of the screw 33 is inserted, and the angle adjustment is performed so that the angle between the upper end portion of the plate 11 and the lower end portion of the femoral tube 32 can be changed. It is connected in the shape of a “<” via the means 20.
[0012]
The angle adjusting means 20 is configured as shown in FIG. That is, the connecting shaft 123 is coupled to the lower end portion of the femoral tube 32 so that the femoral tube 32 and the connecting shaft 123 can rotate integrally, and the connecting shaft can freely enter and exit the upper end portion of the plate 11. A bearing portion 124 having a portion 124 a is formed so as to rotatably support the connecting shaft 123, and a female screw bolt hole 125 penetrating to the inner surface of the bearing portion 124 is formed and fitted into the bolt hole 125. When the fixing bolt 125a is screwed in, the front end portion 125b of the fixing bolt 125a protrudes toward the open portion 124a of the bearing portion 124, and the connecting shaft 123 is pressed against the inner surface of the bearing portion 124 to be fixed by a frictional force. Contrary to the present embodiment, the same effect can be obtained by forming the bearing portion 124 at the lower end portion of the femoral tube 32 and connecting the connecting shaft 123 to the upper end portion of the plate 11 .
[0013]
An example in which the implant member of FIG. 1 is used for a femoral fracture will be described with reference to FIG. As shown in FIG. 3, a case is assumed in which a fracture occurs in the neck 18. The connecting shaft 123 coupled to the lower end portion of the femoral tube 32 is fitted into the bearing portion 124 formed on the upper end portion of the plate 11 from the opening portion 124a , and then the connecting shaft 123 can freely rotate in the bearing portion 124 with fingers or the like. The fixing bolt 125a is lightly tightened to such an extent that does not come off. Then, the bone head 15 separated from the diaphysis 16 by fracture is pressed against the diaphysis 16, drilled at a predetermined angle using a drill and a tap, and a lag screw 33 fitted into the femoral tube 32 is inserted into the hole. Insert and screw into bone head 15. Before completely tightening the lag screw 33, the plate 11 is moved by fingers or the like to adjust the angle, and after confirming that the plate 11 is parallel to the surface of the diaphysis 16, the fixing bolt 125a is completely tightened. Then, the angle formed between the femoral tube 32 and the plate 11 is fixed, and then the lag screw 33 is completely tightened to bring the plate 11 into close contact with the surface of the diaphysis 16, and the screw fitting hole 14 formed in the plate 11 in advance. Then, the screw is screwed into the diaphysis 16 and the plate 11 is fixed along the surface of the diaphysis 16.
[0014]
Incidentally, the femoral head for shaft member 10 is not limited to the combination of the femur tube 32 and lag screw 33 shown in FIG. 1, instead of the femur tube, of various forms as shown in FIGS. 7-9 A lag screw fixing member 132 can also be used. The shape of the lag screw fixing member 132 is prepared in a wide shape (FIG. 7 ), a triangular shape (FIG. 8 ), a rectangular shape (FIG. 9 ), etc. so that the most suitable one can be selected for each patient. It is preferable to keep it. The number of the lag screw to be used in pairs with these lag screws fixing member 132 is not necessarily limited to one, it may be desirable to use a plurality, depending on the individual patient, e.g., FIGS. 8 and 9 As shown in Fig. 2, two and three lag screw engaging holes 133 are provided in the lag screw fixing member 132 so that a plurality of lag screws can be screwed and fixed to the bone head through the engaging holes 133. It is also preferable to keep it.
[0015]
As described above, by using the implant member of the present invention (Claim 1) , the angle of the conventional example 2 can be changed. In addition to being able to prevent lifting, a femoral tube (or lag screw fixing member) and a plate can be appropriately combined during surgery, so that an implant member of the size and shape most suitable for an individual patient compared to Conventional Example 2 Can be used.
[0016]
【The invention's effect】
According to the present invention (Claim 1) , the plate and the head member for the head of the head are connected via the connecting means so that the angle between them can be changed, and the plate and the shaft member for the head of the head are connected with a simple structure. Since it is configured to be detachable, the plate or the shaft member for the head of the bone can be used appropriately even if there are individual differences in the size and shape of the bone head and diaphysis itself, or even if the site and degree of fracture differ in each case In addition to being able to replace the combination that best suits the individual patient, the angle between the plate and the shaft for the head during surgery is determined according to the angle between the bone head and diaphysis, which varies between individuals. Can be adjusted freely and fixed at any angle .
[Brief description of the drawings]
FIG. 1 is an arrow view showing the relationship between components of an implant member of the present invention (Claim 1 ).
FIG. 2 is a cross-sectional view of the angle adjusting means of the implant member of the present invention (Claim 1 ).
FIG. 3 is a cross-sectional view showing a state in which the implant member of the present invention (Claim 1 ) is attached to the femur.
FIG. 4 is a cross-sectional view showing a state in which the implant member of Conventional Example 1 is attached to the femur.
FIG. 5 is a front view showing an implant member of Conventional Example 2.
6 shows an angle adjusting means constituting the implant member of the conventional example 2, is a CC sectional view of (a) BB sectional view of FIG. 5, the (b) and (c) 6 (a).
Figure 7 shows an example of embodiment of the lag screw fixing member, (a) represents a front view, (b) is a side view, (c) is a plan view.
FIG. 8 shows an example of another form of the lag screw fixing member, where (a) is a front view, (b) is a side view, and (c) is a plan view.
FIG. 9 shows an example of another form of the lag screw fixing member, (a) is a front view, (b) is a side view, and (c) is a plan view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Shaft head shaft member, 11 ... Plate , 13 ... Screw member (Cancellus screw), 14 ... Screw engaging hole (screw hole), 15 ... Femoral head, 16 ... Femoral shaft, 17 ... Large Trochanter, 18 ... femoral neck , 20 ... angle adjusting means (adjustable unit) , 3 2 ... femoral tube, 33 ... lag screw, 34 ... connecting shaft, 35 ... first actuating member, 35a ... knob ( angle adjustment screw), 35b ... male screw, 36 ... second actuating member, 36a ... protrusion, 36b ... female screw, 36c ... recess 1 23 ... connection shaft, 124 ... bearing portion, 124a ... opening, 125 ... bolt Hole, 125a ... Fixing bolt, 125b ... Tip, 132 ... Lug screw fixing member, 133 ... Lug screw engagement hole

Claims (1)

大腿骨骨頭部に埋設される骨頭用軸部材と、この骨頭用軸部材の下端部に接続され大腿骨骨幹部外表面に沿って固定されるプレートとを備え、前記プレートの上端部と前記骨頭用軸部材の下端部とが、互いのなす角度が変化できるように連結手段を介して連結され、この連結部には角度調整手段が設けられているインプラント部材において、前記角度調整手段が、前記骨頭用軸部材の下端部と前記プレートの上端部のいずれか一方の部材には前記連結手段としての連結軸が一体に接合され、他方の部材にはこの連結軸を出し入れできる開放部を有する軸受け部が形成され、前記連結軸が前記軸受け部で回転自在に支持され、さらに前記軸受け部の内面へ貫通する雌ネジを有するボルト穴が形成され、この雌ネジに螺合する雄ネジを有する固定ボルトが備えられ、この固定ボルトが締め込まれたとき、その先端が前記開放部側に突き出るとともに前記連結軸を前記軸受け部に押し付けて固定するように構成されていることを特徴とする大腿骨骨接合用インプラント部材。A head member embedded in the femoral head; and a plate connected to the lower end portion of the head member and fixed along the outer surface of the femoral shaft; the upper end portion of the plate and the head The implant member in which the lower end portion of the shaft member for use is connected via a connecting means so that the angle formed by each other can be changed, and the angle adjusting means is provided at the connecting portion, wherein the angle adjusting means is A bearing shaft having a connecting shaft as the connecting means is integrally joined to one of the lower end portion of the shaft member for the head and the upper end portion of the plate, and the other member has an open portion that allows the connecting shaft to be taken in and out. A bolt hole having a female screw that penetrates to the inner surface of the bearing portion, and a male screw that engages with the female screw is formed. Belt is provided, when the fixing bolt is tightened, the femur, characterized in that it is configured so that its tip is fixed against the connecting shaft with protruding to the opening side of the bearing portion Implant member for osteosynthesis.
JP2001215439A 2001-07-16 2001-07-16 Implant member for femoral osteosynthesis Expired - Lifetime JP4015828B2 (en)

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US11259851B2 (en) 2003-08-26 2022-03-01 DePuy Synthes Products, Inc. Bone plate
US8574268B2 (en) 2004-01-26 2013-11-05 DePuy Synthes Product, LLC Highly-versatile variable-angle bone plate system
US11291484B2 (en) 2004-01-26 2022-04-05 DePuy Synthes Products, Inc. Highly-versatile variable-angle bone plate system
US7229445B2 (en) 2004-06-21 2007-06-12 Synthes (Usa) Bone plate with bladed portion
GB0505505D0 (en) * 2005-03-17 2005-04-27 Dall Desmond Meiring Configurable bone fixation system
JP2008237593A (en) * 2007-03-27 2008-10-09 Homuzu Giken:Kk Orthopedic implant
US8926611B2 (en) 2009-09-14 2015-01-06 Zimmer Gmbh Angular lag implant for intramedullary nails
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JP6162735B2 (en) * 2015-02-25 2017-07-12 株式会社オーミック Bone retainer and osteosynthesis reinforcement provided with the same
KR20180103904A (en) * 2015-12-15 2018-09-19 모하메드 라쉬완 마푸즈 FEMORAL BASE PLATE THA (FEMORAL BASE PLATE THA)
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US10624686B2 (en) 2016-09-08 2020-04-21 DePuy Synthes Products, Inc. Variable angel bone plate
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