Migration in Total Hip Arthroplasty with a Cemented BiMobile Cup: Better Stability with More Cement?

Inclusion Criteria: * Patient requiring an elective primary cemented THA. * Male patient ≥70 years old and female patient ≥65 years old. * Ability and willingness to follow instructions and to return for follow-up evaluations. * The patient is able to understand the meaning of the study and is willing to sign informed consent. * Understanding the Dutch language. Exclusion Criteria: * The patient is morbidly obese, defined as Body Mass Index (BMI) of ≥ 40. * The patient is expected to need lower limb joint replacement for another joint within one year. * The patient has a systemic or metabolic disorder leading to progressive bone deterioration. * The patient has a deformity or disease located in other joints than the hip that needs surgery and that is limiting their ability to walk. * The patient has an active or suspected latent infection in or around the hip joint. * The patient's bone stock is compromised by a disease or infection which cannot provide adequate support and/or fixation to the prosthesis. * The patient is unable or unwilling to sign informed consent for this study. * The patient is deemed unsuitable for participation in the study based on the investigator's judgment.