SCREW FOR ANGULARLY ADJUSTABLE OSTEOSYNTHESIS AND FIXING DEVICE FOR BONES IN OSTEOSYNTHESIS.

摘要

Osteosynthesis screw (2; 14) with a screw shank (4; 21) concentric to a longitudinal axis of the screw (5; 24) to be anchored in a bone or in a part of the bone, and with a screw head (3 ; 22), with the osteosynthesis screw (2; 14) between the screw head (3; 22) and the screw shank (4; 21) a disk-shaped flange (6; 23) concentric to the longitudinal axis of the screw (5; 24) whose diameter is larger than the diameter of the screw shank (4; 21) and comprising the flange (6; 23) edges (53; 54; 56) concentric to the longitudinal axis of the screw (5; 24) , characterized in that A) the edges (53; 54; 56) are configured in the form of circular lines and have the diameters d; d1; d2; di sized so that the edges (53; 54; 56) are developed on an imaginary convex surface (55) on the side of the screw shank and because B) the imaginary surface (55) consists of a spherical area with the radius Y concentric to the central axis (8; 16).