CEMENTLESS TOTAL REPLACEMENT OF THE HUMAN HIP JOINT

摘要

The solution is based on the fact, that on the surface of the acetabulum (3) there is a self-drilling thread, containing at least three independent teeth (41, 42 and 43) which have advantageously concave shape of the cutting edge and truncated pike, whereas the planes of their upper edges lie on a spherical surface. The femoral component (1) has on outer side of his lower part (11) an asymmetric tapering under the angle gamma = 20 DEG to 70 DEG and on the upper part (13) a convexly widened outer side. Minimally on the lower part (11) and middle part (12) of the inner side of the femoral component (1) at least one longitudinal groove (5) is provided, and minimally on one side plane of the middle part (12) and/or of the upper part (13) there is at least one transversal rib (6) provided, formin with the axis of the wedge an angle beta = 70 DEG to 110 DEG . At least on a part of the outer surface of the acetabulum (3) a nanocrystalline diamond or hydroxylapatite layer is preferably created and at least on a part of the outer surface of the femoral component (1) a nanocrystalline diamond and/or hydroxylapatite layer is provided.