A distal surface which is shaped and dimensioned such as to face the target portion of the bone so that the proximal face, the body is attached, osteosynthesis device, the distal surface of the proximal side along the central axis I comprises a body having a through hole passing through the main body. I includes a first protruding portion extending in a direction of the central axis from the inner surface of the through hole through hole. First protruding portion is biased to be a stress-free extending to point the first protruding portion is spaced a first distance from the central axis in the through hole. First protruding portion may be moved to the side of the inner surface when subjected to force in the outward direction from the center axis. [Selection] Figure Figure 1骨接合装置は、近位面と、本体が取り付けられることとなる骨の目標部分に対面するような形状及び寸法とされた遠位面と、中心軸に沿って近位面から遠位面へと本体を貫通する貫通孔とを有する本体を備える。貫通孔は貫通孔の内面から中心軸の方向に延在する第1の突起部を備える。第1の突起部は、貫通孔の内部において第1の突起部が中心軸から第1の距離を隔てた個所まで延在する無応力状態となるように付勢される。第1の突起部は中心軸から外側方向への力を受けたときに内面の側へと移動し得る。【選択図】図1
