| abstract |
There is provided a high flexural stiffness elastic member (20) of short overall length for use in a bone or vertebra stabilizing device (100). The elastic member (20) is formed as a substantially cylindrical body, wherein an elastic portion consisting of at least two coaxial coil springs is provided. The turns of the coil springs all have the same pitch (α) and are arranged so that the turns (3) of the one coil spring extend at least in a portion between the turns (4) of the other coil spring. Furthermore, the elastic element has no bore, which otherwise could have extended along the center axis M of the element. The elastic element (20) thus formed may be part of a bone screw (60,80,101,101 '), a rod-shaped element (50) or other elements used in a stabilizing device (100). |