Ceramic-on-Ceramic Total Hip Arthroplasty and Squeaking: Influence of Component Design

Inclusion Criteria: * All patients scheduled for uncemented THA under the age of 65 years. Exclusion Criteria: * Patients with the following diagnoses of the hip: Recent femoral fracture, sequelae from older femoral fracture, acetabular fracture, and traumatic dislocation of the hip. * Patients without ability to give informed consent and/or willingness to participate in the follow-up protocol. * Severely impaired level of function due to other physical deficiencies than the hip. * Mental disability that could impair a patient's decision-making capability of giving informed consent and not enabling valid data collection. * Earlier primary THA or revision THA in the contralateral hip. * Pathology requiring another prosthesis concept than the below mentioned. * Body mass index greater than 35.