< Topic >Iteration using, it is to offer x tender for the dentaruinpuranto operation instrument the retention span of the grip section is difficult to decrease.SolutionsThe wall which possesses the 1st, 2nd, 3rd and 4th wall which has extended the elastic deformation possible median wall which has been located between the slit section of the pair where the cartridge head where extension it has 2 and grip section 3, joints grip section 3, to the Tip 2of a extension and 2 possesses the bottom field of abbreviation quadrangular condition and, we are joint to 4 arms of the bottom field respectively, alongside the medial axis in sequence and, we have, as for the 1st wall, from the Tip to the bottom field has extended and the slit section of pair and, possessing,When the median wall which is opposed mutually and distance between the 3rd wall L1, designating the distance between the 2nd and 4th wall which is opposed mutually as L2, L1 and L2, have the relation of L1Drawing 1【課題】繰り返し使用しても把持部の把持力が低下し難いデンタルインプラント手術器具用エクステンダーを提供することである。【解決手段】延長部2および把持部3を備え、把持部3は、延長部2の先端部2aに接続しており略四角形状の底領域を有する底部と、底領域の4辺にそれぞれ接続しており中心軸に沿って延びている第1、第2、第3および第4壁部を順に有する壁部と、を備え、第1壁部は、その先端部から底領域に延びている一対のスリット部と、一対のスリット部の間に位置している弾性変形可能な中央壁部と、を有し、互いに対向している中央壁部および第3壁部の間の距離をL1、互いに対向している第2および第4壁部の間の距離をL2としたとき、L1およびL2が、L1
