A bone anchoring assembly for use in spinal surgery or trauma surgery is provided comprising : an anchoring element (1) having a shaft (2) and a receiving part (3) having a substantially U-shaped cross-section with a base connected to said shaft and two free legs (6,7) forming a channel (4) for receiving a rod a rod (9) having an at least partially structured surface (10,11) a locking member (12) cooperating with the receiving part for locking said rod in the channel (4) wherein at least on the locking member (12) or in the receiving part an engagement portion (13 14,15) for engaging said structured surface (10,11) of the rod is provided characterized in that the locking member, the rod and the receiving part cooperate in such a manner that as soon as the engagement portion comes into engagement with the structured surface the rod is held in the receiving part in a form-locking manner preventing movement of the rod. (Fig. 3)本案提供一種骨骼固定總成,用於脊柱手術或傷害手術,包括:固定元件(1),有軸(2),和容納組件(3),呈實質上U形斷面,基部連接於該軸,二自由股部(6,7)形成溝道(4),以容納桿;桿(9),具有至少部份結構化表面(10,11);鎖定構件(12),與容納組件合作,把該桿鎖定於溝道(4)內;其中至少在鎖定構件(12)上或在容納組件內,設有結合部(13;14,15),供結合桿之該結構化表面(10,11);其特徵為,鎖定構件、桿和容納組件合作,其方式為,一旦結合部與結構化表面結合時,桿即以形式鎖定方式保持在容納組件內,防止桿運動。2...螺紋軸3...容納組件5...容納組件底部8...陰螺紋9...縱向桿10...沿周凹溝11...沿周峰部12...鎖定構件13...環形凸部16...中心凹部
