ACETABULAR SOCKET OF COMPOSITE ARTIFICIAL HIP JOINT

摘要

An acetabular socket of a composite artificial hip joint is disclosed. The socket has a concave semicircular shape, and comprises an outer layer (1) and an inner layer (3), wherein the outer layer (1) comprises a screw hole (2) formed from a biocompatible material; the inner layer (3) is formed from polyetheretherketone or a high molecular material of a derivative thereof, and fixed to the outer layer (1) to form as an integrated structure; and the screw hole (2) is covered by the inner layer (3). The contact between a surface of the inner layer (3) and an outer surface of each of different acetabular socket liners (5) may reduce a stress concentration, decreasing a risk of fretting wear and damage to the acetabular socket liner (5). In addition, the surface of the inner layer (3) and an outer surface of an artificial femoral head (6) directly form a friction pair, reducing wear of the outer surface of the artificial femoral head (6). The surface of the inner layer (3) has the advantages of being corrosion-resistant and fret-resistant, preventing metal ions and particles of metal prosthesis from being released and damaging a human body.