Compaction Total Hip Arthroplasty (THA) Bilateral

Compaction THA Bilateral

This is a prospective, randomized study comparing two different bone preparation techniques for insertion of a porous coated titanium cementless femoral stem. Patients receiving a bilateral total hip replacement are randomized to conventional broaching on one side and compaction on the other side.

Hypothesis: Compaction results in significantly less stem migration [evaluated by radiostereometric analysis (RSA)], less peri-prosthetic bone mineral density (BMD) loss [evaluated by dual energy x-ray absorptiometry (DEXA)], and a higher Harris hip score after two years.

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-steroidal anti-inflammatory drugs (NSAIDs) 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.