PROBLEM TO BE SOLVED: To provide a surgical instrument for dental implant securing torque resistance and durability by disposing a gripping mechanism at a position different from a position to which the torque is applied, and retaining workability of the surgery.SOLUTION: An adapter includes: a polygonal female stationary part to be fixed to a dental driver, at a fixture-side end part in a through-hole and a wrench connection part for fitting a torque wrench, at an end part in the opposite side of the fixture side. The dental driver includes: a shaft body part including an upper shaft that is storable in the through-hole of the adapter, and a rotation transmission shaft that is formed at a fixture-side end part a polygonal male stationary part fitted with a female stationary part formed at the rotation transmission shaft side of the upper shaft and a projection part formed at a position different from the male stationary part of the upper shaft. The through-hole of the adapter includes a penetration-shaped connecting member including a grip part that grips the projection part of the upper shaft to connect the dental driver.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】本発明は、把持機構をトルクの掛かる位置とは別の位置に配置して、耐トルク力と耐久性を確保し且つ手術の作業性を保持する歯科インプラント用手術器具を提供する。【解決手段】アダプタは、貫通孔内のフィクスチャー側の端部に歯科ドライバーに固定される多角形状の雌固定部と、フィクスチャー側と反対側の端部にトルクレンチを嵌合するレンチ連結部とを有しており、歯科ドライバーは、アダプタの貫通孔内に収納可能な上部軸部、及びフィクスチャー側の端部に形成された回転伝達軸部を備えた軸本体部と、上部軸部の回転伝達軸部側に形成された雌固定部と嵌合してアダプタを固定する多角形状の雄固定部と、上部軸部の雄固定部と異なる位置に形成された突起部とを有しており、アダプタの貫通孔内には、上部軸部の突起部を把持して歯科ドライバーを連結する把持部を有する貫通形状の連結部材が内在されている。【選択図】図1
