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发明公开
CN101966096A 骨锚固装置 有权 转让

骨锚固装置
摘要：
提供一种骨锚固装置，其包括锚固在骨头或脊椎骨上的柄(2)和头部(3)的锚固构件(1)、包括第一端(6)和与第一端相对的第二端(7)的容纳部分(5)，纵向轴线(8)穿过所述两端，孔(5)与纵向轴线同轴，第一区域(11)靠近第二端(7)以容纳所述头部，并且凹槽(12)向着第一端(6)开口并形成两个自由支柱(15，16)以容纳杆(14)；在所述头部(3)上施加压力以将所述头部锁定在容纳部分(5)内的压力构件(20)；以及与所述支柱(15，16)配合以将所述杆紧固在所述凹槽(12)内的闭合构件(30；40，45)，其中，所述压力构件(17)具有第一端(21)和与第一端(21)相对的第二端(22)，并且凹槽(24)向着第一端(21)开口以容纳所述杆，凹槽(24)的深度杆的直径更大，以及在预装配状态下压力构件(17)的凹槽(24)的底部(27)在向着容纳部分(5)的第一端(6)的方向上伸出超过凹槽(12)的底部(13)。
摘要（英）：

A bone anchoring device is provided comprising an anchoring element (1) a shank (2) to be anchored in a bone or a vertebra and a head (3), a receiving portion (5) comprising a first end (6) and a second end (7) opposite to the first end, a longitudinal axis (8) passing through the two ends, a bore (5) coaxial with the longitudinal axis, a first region (11) adjacent to the second end (7) for receiving aid head and a recess (12) which is opened towards the first end (6) and which forms two free legs (15, 16) for receiving a rod (14), a pressure element (20) which exerts a pressure on said head (3) to lock said head in the receiving portion (5), and a closure element (30; 40, 45) cooperating with said legs (15, 16) to secure the rod in said recess (12), wherein said pressure element (17) has a first end (21) and a second end (22) opposite to the first end (21) and a recess (24) which is open towards the first end (21) to receive the rod, the depth of the recess (24) being larger than the diameter of the rod and wherein in a pre-assembled state the bottom (27) of the recess (24) of the pressure element (17) projects over the bottom (13) of the recess (12) of the receiving portion in a direction towards the first end (6) of the receiving portion (5).

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