The fixed screw which the screw petiole (1) and the screw petiole (1) the washer which is locked in the cup (6) the bar which includes the installation expedient to (3) and the other instrument (8) with, the cup (6) is screwed in with inside and the bar (8) decides position (11) relation the fixed plug which is attached (9) with the vertebra fixture which is included. The fixed plug (9) the cup (6) the projection which is enclosed inside (12) it incorporates, the fixed plug (9) with the fixed screw (11) from assembly ones which are constituted, the fixed screw (11) the cup (6) positioning on, while, tightening guides the bar (8) it pushes vis-a-vis the washer (3). The cup (6) and the fixed plug (9) the outside almost with circle, the level cutting part which opposes here mutually (13,14) interrupts, this cutting part the bar (8) becomes the help which reduces the width of fixture in axial direction.ねじ柄部(1)と、ねじ柄部(1)をカップ(6)に固定する座金(3)と、他の器具への取り付け手段を含むバー(8)と、カップ(6)の内側でねじ込まれバー(8)の位置を決定する固定ねじ(11)に関連付けられた固定プラグ(9)とを含む椎骨固定具。固定プラグ(9)はカップ(6)内部に封入される突起(12)を組み入れ、固定プラグ(9)と固定ねじ(11)から構成される組み立て物を、固定ねじ(11)をカップ(6)上に位置決めして締める間に案内し、バー(8)を座金(3)に対して押す。カップ(6)と固定プラグ(9)の外面はほぼ円形で、ここに互いに対向する平らなカット部分(13,14)が割り込み、このカット部分がバー(8)の軸方向に固定具の幅を減じる助けとなる。
