| abstract |
Bone transplant composed of a cortical bone substance, with a screw shank (1) and a screw head (2) for introducing a screwing-in torque, wherein both the screw shank (1) and the screw head (2) are provided with an outer thread, it being proposed according to the invention that at least the outer thread of the screw shank is a multi-start thread. By virtue of the design according to the invention, it is possible, on the one hand, to achieve a defined stroke with fewer rotations or in a shorter time, as a result of which the screwing-in behaviour is improved and the tendinous tissue is spared. On the other hand, the use of multiple thread turns makes available a large surface area for the attachment of the tendinous tissue to the tendon anchor, as a result of which the fixing of the tendon is improved and the rotational stability enhanced. The bone transplant according to the invention thus ensures good fixing of the tendon and can be implanted quickly. |