Fixation of OsseoTi™ Porous Structure Versus PPS (Porous Plasma Spray) Coating on the G7™ Acetabular Component for Primary Total Hip Arthroplasty

Inclusion Criteria: * • Participants with primary hip osteoarthritis set to receive a primary unilateral uncemented total hip arthroplasty. * Participants must be 18-75 years of age. * Participants must be able to speak and understand Danish (or depending on country where patient is enrolled). * Participants must be able to give informed consent and be cognitively intact. * Participants must be expected to be able to complete all postoperative controls. * Participants must not have severe comorbidities, ASA-score ≤ 3. Exclusion Criteria: * Terminal illness. * Rheumatoid arthritis. * Previous fracture of the hip. * Osteonecrosis of the hip. * Previous infection of the hip. * Severe bony deformity warranting the use of non-standard implants. * Metastasis in the periarticular bone or proximal femur. * Female patients that are pregnant or planning pregnancy during follow-up period * If bone stock or femoral canal type, assessed on preoperative x-ray, warrants the use of cemented fixation. * Documented osteoporosis with patient in active medical treatment. * Comorbidity with altered pain perception (e.g. DM with neuropathy). * Participants that develop deep infection in the follow-up period are excluded from the project.