PROBLEM TO BE SOLVED: To provide an abutment member, capable of achieving a prescribed elastic locking function and a rotation preventing function even when excessive rotating force is loaded.SOLUTION: The abutment member is for use in combination with an embedded fixing member. The abutment member includes a ceramic support, and a metal engagement member engaged between the ceramic support and the embedded fixing member. The metal engagement member includes a first engagement projection to prevent rotation to the embedded fixing member, a flange part, a second engagement projection engaged with an engagement recess to prevent rotation to the ceramic support, and a locking projection to be locked to a locking recess to achieve elastic locking force in this order from the side of the embedded fixing member. A wall member composing the locking projection is split to a plurality of overhang support pieces by axially extended slits. As the locking projection of the metal engagement member is inserted to the locking recess of the ceramic support, the respective overhang support pieces are elastically deformed, and each overhang support piece achieves elastic locking force in the counter-axial center direction.COPYRIGHT: (C)2011,JPO&INPIT【課題】過大な回旋力が負荷された場合でも、所定の弾性係着機能及び回旋防止機能を発揮する支台部材を提供する。【解決手段】埋入固定具と組み合わせて使用される支台部材であって、支台部材は、セラミック製支持体と、セラミック製支持体と埋入固定具との間に嵌入される金属製嵌合体と、を備え、金属製嵌合体は、埋入固定具の側から順に、埋入固定具との回旋を防止する第一嵌合凸部と、フランジ部と、嵌合凹部と嵌合してセラミック製支持体との回旋を防止する第二嵌合凸部と、係合凹部と係着して弾性係着力を発揮する係合凸部と、を備え、係合凸部を構成する壁体は、軸方向に延在するスリットによって複数の片持ち支持片に分割されており、金属製嵌合体の係合凸部がセラミック製支持体の係合凹部に挿入されたときに、各片持ち支持片が弾性的に変形することにより各片持ち支持片が反軸心方向の弾性係着力を発揮する。【選択図】図2
