A rod-shaped implant element (1) is provided for connecting at least two bone anchoring elements (2, 3), each of which comprising an anchoring section (21, 21’) to be anchored in the bone and a receiver member (22, 22’) to be connected to the rod-shaped implant element, the rod-shaped implant element comprising: a longitudinal axis at least one first length of a rigid section (4) that is configured to cooperate with and be received in the receiver member a section length of a flexible section (8) adjacent to the rigid section a bore (9) coaxial to the longitudinal axis and extending through the rigid section and the flexible section and a core (12) accommodated in the bore, the core having two opposite ends, wherein at least one end of the core is freely movable in the bore when said flexible section is extended or compressed in a direction of the longitudinal axis.(Fig. 10)本案提供一種桿狀植入元件(1),供連接至少二骨骼固定元件(2,3)之用,各包括要固定於骨骼內之固定段(21,21’),以及要連接至桿狀植入元件之接納構件(22,22’),桿狀植入元件包括:縱軸線;至少第一長度之硬性段(4),構成與接納構件合作並接納於其內;第二長度之撓性段(8),鄰接硬性段;腔孔(9),與縱軸線共軸,延伸貫穿硬性段和撓性段;以及芯管(12),容納於腔孔內,芯管有兩端;其中當該撓性段按縱軸線風氣伸縮時,芯管至少一端是在腔孔內自由運動。1...桿狀植入元件4...第一硬性段6...第二硬性段8...撓性段9...共軸腔孔10...螺旋長孔型開口11...匝圈12...芯管13,14...封閉構件
