A Comparison of Two Surface Materials (Tantalum Versus Titanium Fiber Mesh) of Acetabular Components in Hip Arthroplasty

Inclusion Criteria: * Patients with primary arthritis in the hip. * Patients with sufficient bone density to allow uncemented implantation of a femoral component. * Informed patient consent in writing. Exclusion Criteria: * Patients with neuromuscular or vascular disease in the affected leg. * Patients found upon operation to be unsuited for uncemented acetabulum component. * Patients who regularly take non-steroid anti-inflammatory drugs (NSAID) and cannot interrupt intake for the postoperative phase of the study. * Patients with fracture sequelae. * Female patients of childbearing capacity. * Hip joint dysplasia. * Sequelae to previous hip joint disorder in childhood.