A bone anchoring device is provided comprising an anchoring element (1) comprising a shank (2) to be anchored in a bone or a vertebra and a head (4) a connection element (20) for connecting at least two anchoring elements a receiving part (6) having a first end receiving the head (4), wherein the head is pivotable in the receiving part, and a second end cpmprising a recess (13) for receiving the connection element (20) a first pressure element (17) which exerts pressure on the head (4) to lock the head in the receiving part (6) a second pressure element (23) which exerts pressure on the connection element (20) to press the connection element against the first pressure element (17) wherein the contour of the surface of at least the first pressure element (17) or the second pressure element (23) facing the connection element (20) deviates from the contour of the surface of the connection element.(Fig. 1)本案提供一種骨骼固定裝置,包括:固定元件(1),包括要固定於骨骼或脊椎之莖部(2)和頭部(4);連接元件(20),把至少二固定元件加以連接;接納組件(6),具有接納頭部(4)的第一端(頭部可在接納組件內樞動),和包括凹部(13)以接納連接元件(20)的第二端;第一施壓元件(17),對頭部(4)施壓,把頭部鎖定於接納組件(6)內;第二施壓元件(23),對連接元件(20)施壓,把連接元件緊壓於第一施壓元件(17);其中面朝連接元件(20)的至少第一施壓元件(17)或第二施壓元件(23)之表面輪廓,與連接元件的表面輪廓有偏差。1...骨骼固定元件2...莖部3...尖部6...接納組件10...腔孔13...U形凹部14,15...股部16...陰螺紋17...第一施壓元件19...圓筒形凹部20...桿21...共軸腔孔22...肋條狀凸部23...第二施壓元件26...圓筒形凸部28...肋條狀凸部30...內螺釘31...圓筒形凸部32,33...捲縮腔孔L...桿的縱向軸線
