Clinical and Radiological Outcomes of the ROMAX Hip Resurfacing System

Inclusion Criteria: * Patients eligible for hip resurfacing, suitable for the implantation of a Medacta ROMAX hip resurfacing system according to the manufacturer's defined indication for use. * Aged between 18 and 65 years at the time of surgery. * Ability and willingness to provide written informed consent for participation. Exclusion Criteria: * Active infection * BMI \> 40 * Mental illness, when the known pathology is likely to compromise the patient's ability to consent, affect the patient's assessment of their progress, or complete follow-up appointments and exams. * Significantly deformed anatomy (at the surgeon's discretion) * Osteomalacia where the fixation of an uncemented implant is contraindicated * Active rheumatoid arthritis * Osteoporosis * Metabolic disorders likely to impair bone formation and for which the fixation of an uncemented implant is contraindicated * Muscle atrophy or neuromuscular disease * Known allergy or hypersensitivity to the implant material * Any patient who cannot or does not wish to give informed consent to participate in the study * Patients whose chances of regaining independent mobility would be compromised by known concomitant medical issues.