Cementless total replacement of human hip joint

摘要

In the present invention, there is disclosed a cementless total replacement of a human hip joint comprising an acetabulum (3), on the outer surface of which there is provided a self drilling thread, a head (2), a femoral component (1) in the shape of a flat wedge and optionally an inlay, characterized in that the self drilling thread consists of at least three independent teeth (41,42 and 43) having preferably concave shape of the cutting edge and a truncated pike wherein said teeth (41,42 and 43) upper edges lie on a spherical surface. Said femoral component (1) has on outer side of its lower part (11) an asymmetric tapering under the angle ranging from 20 to 70 degrees and on the upper part (13) a convexly widened outer side. at least 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 at least on one side plane of the middle part (12) and/or of the upper part (13) there is provided at least one transversal rib (6), forming with the axis of the wedge an angle beta ranging from about 70 to about 110 degrees. At least on a part of the outer surface of the acetabulum (3) a nanocrystalline diamond or hydroxyapatite layer is preferably created and at least on a part of the outer surface of the femoral component (1) a nanocrystalline diamond and/or hydroxyapatite layer is provided.