Centering aid for a joint head cap implant of an artificial hip joint

摘要

Centering aid comprises a dome-shaped cap (1) placed on the bone head of a natural hip joint with a radial bore in a pole region and a further bore, a gage (9) having a block-shaped structure with a number of bores (10) and a stopping pin (13) which can be placed in a bore in the bone head, and guiding pins (3, 3') for placing through the radial bore and through the bore of the gage. Preferred Features: The pole region of the cap is fixed to a bore reaching up to the pole region of the cap by a cylindrical bushing.