A longitudinal member (1) for use in spinal or trauma surgery is provided whuch is sized to span a distance between at least two vertebrae or two bone parts, wherein the longitudinal member is made at least partially of a polymer material, such as an elastomer, which is extruded. The polymer chains (2) of the longitudinal member are substantially aligned in the longitudinal direction of the member. A dynamic stabilization device comprises at least two bone anchoring elements and such a longitudinal member connecting the bone anchoring elements.(Fig. 8a)本案提供脊柱或創傷手術用之縱向構件(1),其尺寸是可跨越至少二脊椎骨或二骨骼組件間之距離,其中縱向構件至少部份是由擠製之聚合物材料,諸如彈料製成。縱向構件之聚合物鏈(2)實質上在構件之縱向對準。動態穩定裝置包括至少二骨骼固定元件,以及連接骨骼固定元件之上述縱向構件。1...擠製桿14,14...骨骼固定元件15...螺紋軸部16...球形頭部17...容納件A...軸向箭頭F...撓曲箭頭
