PROBLEM TO BE SOLVED: To easily perform reaming of an acetabular hole or in-surgery operation where an acetabular roof is set by use of a computer three-dimensional shape model prepared before surgery and by use of a simple-structure implement during the surgery.SOLUTION: This support implement during artificial hip cup surgery includes: a sighting shaft 22 holding an acetabular pins 40a- 40c positioned in acetabular indication points set in a plurality of parts of an acetabular roof of a pelvis and an acetabular bottom pin 42 positioned in the center of the acetabular bottom in a lower end part, and having a sighting part 32 crossing the axis thereof in an upper end part a characteristic point indication shaft 24 whose lower end part is positioned at a prescribed characteristic point in the pelvis a positioning arm 26 holding the sighting shaft 22 and the characteristic point indication shaft 24 parallel to each other, and positioning a position of the characteristic point indication shaft 24 in a direction orthogonal to the axial direction of the characteristic point indication shaft 24 and a support shaft 28 having one end swingably connected to the positioning arm 26 and the other end fixed to a prescribed characteristic point in the pelvis.COPYRIGHT: (C)2013,JPO&INPIT【課題】術前に準備したコンピュータ三次元形状モデルを使って、術中は簡単な構造の治具を用いて、臼蓋穴のリーミングや、臼蓋カップを設置する術中操作を容易に行えるようにする。【解決手段】本発明による人工股関節臼蓋術中支援治具は、骨盤の臼蓋に複数箇所設定されている臼蓋指示点に位置決めされる臼蓋ピン40a乃至40cと臼蓋底の中心位置決めされる臼蓋底ピン42を下端部に保持し、上端部には軸線で交差する照準部32を有する照準シャフト22と、骨盤における所定の特徴点に下端部が位置決めされる特徴点指示軸24と、照準シャフト22と特徴点指示軸24を平行に保持するとともに、特徴点指示軸24の軸方向と直角な方向に特徴点指示軸24の位置を位置決めする位置決め腕26と、位置決め腕26に一端が揺動自在に連結され骨盤における所定の特徴点に他端が固定される支持シャフト28と、から構成される。【選択図】図4
