A rod-shaped implant (1) is provided in particular for the dynamic stabilization of the spine, at least a portion of which is comprised of a flexible first material forming a matrix (3) in which a flexible structure (2) comprising at least one fiber made of a second material is embedded. The rod-shaped implant can be compressed and extended along the longitudinal axis of the rod-shaped implant while it provides a high torsional stiffness.本案提供一種尤指脊骨動態穩定用之桿狀植入體(1),其至少一部份係由形成矩陣(3)的撓性第一種材料構成,內嵌撓性結構(2),包括至少一種纖維,由第二種材料製成。桿狀植入體可沿其具有高度扭力剛性之縱向軸線伸縮。1...桿狀植入體5...梗釘6...螺紋幹部7...容納部8...U形凹部9...陰螺紋10...結合結構11...固設螺釘L...桿狀植入體之縱向軸線