A bone anchoring device is provided comprising a bone anchoring element (1) having a head (3) and a shaft (2) configured to be anchored in a bone or a vertebra a receiving part (4) for coupling the bone anchoring element to a stabilization element (100), the receiving part having a top end (4a) and bottom end (4b), a bore (9) extending from the top end to the bottom end and having a bore axis (C), a substantially U-shaped recess (10) for receiving the stabilization element, the recess being in communication with said bore (9) a seat member (5) arranged within the bore (9) and being rotatable around the bore axis, the seat member forming a seat for pivotably holding the head, wherein the seat member is configured to allow a greater pivot angle of the bone anchoring element to one side compared to the other side relative to the bore axis (C) a pressure member (6) which contacts the head to exert pressure onto the head, the pressure member (6) being axially movable with respect to the seat member (5) and connected to the seat member (5) so as to transmit rotational forces to the seat member. The orientation of the seat member can be adjusted from the top.本案提供一種骨骼固定裝置,包括:骨骼固定元件(1),有頭部(3),和構成固定於骨骼或椎骨內之幹部(2);容納件(4),把骨骼固定元件聯結於穩定元件(100),容納件具有:頂端(4a)和底端(4b),從頂端延伸至底端之腔孔(9),有腔孔軸線(C);實質上U形凹部(10),以容納穩定元件,凹部與該腔孔(9)相通;支座構件(5),配置在腔孔(9)內,可繞腔孔軸線轉動,支座構件形成樞動保持頭部用之支座;其中支座構件構成使骨骼固定元件在一側比在另一側相對於腔孔軸線(C)之樞動角度為大;壓力構件(6),與頭部接觸,對頭部施壓,壓力構件(6)可相對於支持構件(5)軸向運動,並連接於支座構件(5),以傳送轉動力至支座構件。支座構件定向可從頂部調節。1...骨骼固定元件2...螺紋幹部3...頭部3a...凹部4...容納件5...支座構件6...第一壓力構件7...第二壓力構件8...固設螺釘10...U形凹部11a,11b...自由股部18...支座構件凹部21...凸部23...圓筒形凹部100...桿件L...桿件軸線
