Improving the bearing surface in total hip replacement (THR): the use of oxidised zirconium and highly cross-linked polyethylene

INTERVENTION: Primary total hip replacement, using either cobalt chrome or oxinium femoral heads and either standard or highly cross‐linked polyethylene liners. CONDITION: Arthritis of the hip ; Musculoskeletal Diseases ; Coxarthrosis PRIMARY OUTCOME: Radiographic wear; measuring linear & volumetric wear based on standardised AP & lateral radiographs of the pelvis then analysed with an automated edge detection technique SECONDARY OUTCOME: Not provided at time of registration INCLUSION CRITERIA: 1. The patient and surgeon agree that primary THR is necessary 2. The patient is 18 years of age or older (either sex) on the day of signing the Study Consent Form 3. The patient is capable of participating in the study: 3.1. Fluent in English, or has a capable proxy 3.2. Mentally intact 3.3. Emotionally stable 3.4. A permanent resident in an area accessible to the study site