PROBLEM TO BE SOLVED: To provide a bone anchoring plate capable of retaining anchoring force without significantly expanding a shape of a hole using a multiaxial screw.SOLUTION: A bone anchoring plate 5 includes: an upper face 2 a lower face 3 coming into contact with a treatment object site and a plurality of openings 10 in which the upper face 2 and the lower face 3 are connected. Each opening 10 includes a circular hole part 30 for receiving a screw 8, and at least three or more grooves 40 provided on an outer-side circumference of the hole part 30 at prescribed intervals apart equally. Projections 45 connected from the peripheral edge to the hole 30 of the opening 10 by the intervals of the plurality of grooves 40 are radially formed with an axial center of the hole 30 defined as a center. Each projection 45 has an inner wall surface to which the screw 8 is fixed by self-tapping, where the inner wall surface is formed flat.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2017,JPO&INPIT【課題】多軸型のスクリューを用いて、穴の形状を大幅に拡大することなく、固定力を維持可能な骨固定プレートを提供する。【解決手段】上面2と、治療対象部位に接触される下面3と、上面2と下面3が結合される複数の開口部10と、を有する骨固定プレート5において、開口部10は、スクリュー8を受容する円形状の孔部30と、孔部30の外側周囲に所定の間隔で均等に設けられた少なくとも3つ以上の溝部40と、を有し、複数の溝部40の間隔によって開口部10の周縁から孔部30に通じる突起45が前記孔部30の軸心を中心とした放射状に形成され、突起45は、スクリュー8がセルフタップによって固定される内壁面を有し、この内壁面は、平坦状に形成されている。【選択図】図6
