MFinity BE Pre-market Trial

Inclusion Criteria: * Patients undergoing elective primary total hip arthroplasty for primary osteoarthritis, who are suitable for implantation of a cementless femoral stem according to the MFinity femoral stem Instructions for Use * Skeletally mature adult aged 18 years and older at the time of enrollment. * Ability to give informed consent. * Patient is informed of the conditions of the study and is willing to participate for the length of the prescribed follow-up period. Exclusion Criteria: * Not meeting the inclusion criteria. * Active infection within the affected hip joint. * Previous total hip replacement or hip fusion of the affected hip joint. * Neuromuscular or neurosensory deficiency limiting the ability to evaluate the safety and effectiveness of the device. * Bone condition that may compromise the stability of the implant * Known allergy or hypersensitivity to the implant material * Immunologically suppressed, or receiving steroids in excess of physiologic dose requirements. * For women of childbearing potential\*: a positive pregnancy test * Patients with severe osteoarthritis in the contralateral hip or other joints that may interfere with the assessment of study outcomes. * Patients who have previously participated in this clinical trial. * a woman is considered of childbearing potential, i.e. fertile, following menarche and until becoming post-menopausal unless permanently sterile. A postmenopausal state is defined as no menses for 12 months without an …