PROBLEM TO BE SOLVED: To provide a spinal implant including a down-sized housing that can be commonalized regardless of a diameter of a bone screw and having excellent assemblability.SOLUTION: A spinal implant 1 includes a screw head holding member 4, a ring member 7, a housing 3, and an insert 5. The screw head holding member 4 includes a cylindrical part 21 in which a support part 25 for supporting a screw head 2b from the lower side is formed and that is elastically deformable in the radial direction. The ring member 7 is formed into a C shape that is fitted in an annular groove part 24 formed at the outer peripheral surface of the screw head holding member 4 and is elastically deformable in the radial direction. The housing 3 stores the screw head holding member 4 with it holding the screw head 2b, and the ring member 7 fitted in the annular groove part 24 is engaged with the inner peripheral surface side.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】小型化されたハウジングを骨スクリューの径によらず共通化でき、且つ組立性に優れた脊椎インプラントを提供する。【解決手段】脊椎インプラント1は、スクリュー頭部保持部材4とリング部材7とハウジング3とインサート5とを備えている。スクリュー頭部保持部材4は、スクリュー頭部2bを下側から支持する支持部25が形成された径方向に弾性変形可能な筒状部21を有している。リング部材7は、スクリュー頭部保持部材4の外周面に形成された環状溝部24に嵌まり込むC字状に形成され、径方向に弾性変形可能である。ハウジング3は、スクリュー頭部2bを保持した状態のスクリュー頭部保持部材4を収容し、環状溝部24に嵌まり込んだリング部材7が内周面側に係合する。【選択図】図3
