| 摘要 |
Provided is an artificial prosthesis made of an organic polymeric material for hip hemiarthroplasty, comprising: an inwardly concave first ball head (1), a second ball head (2), and a femoral stem (5). The second ball head (2) is disposed inside the first ball head (1) and connected with the femoral stem (5). The first ball head (1) is made of polyetheretherketone (PEEK) or derivatives thereof, and when in use is placed in a human acetabular fossa with the outer surface thereof directly fitting a human articular cartilage and the inner surface thereof fitting the second ball head (2). The outer surface and the inner surface of the first ball head (1) slidably fit the human articular cartilage and the second ball head (2), respectively, in a dual slidable connection. Internal implant components of the artificial prosthesis for hip hemiarthroplasty are made of a polymeric material so as to reduce the probability of allergic or toxic reactions caused by corrosion of the metal or by the metal itself. The modulus of elasticity of PEEK matches that of human bone so that the stress shielding can be reduced. The sliding friction face of the prosthesis is capable of reducing abrasion. Moreover, all the internal implant components will not interfere with MRI. |
