Direct Superior Approach Versus PosteroLateral Approach in Total Hip Arthroplasty (SPLAsH)

Inclusion Criteria: Subject * Has symptomatic incapacitating coxarthrosis in whom total hip arthroplasty (THA) is indicated, diagnosed by both physical examination and pelvic/hip X-ray * Has signed informed consent * Is ageing 18 years or older at time of study entry * Is competent and able to participate in follow-up Exclusion Criteria: * Previous ipsilateral hip surgery * BMI \>35 kg/m2 * Contralateral incapacitating coxarthrosis, diagnosed by both physical examination and pelvic/hip X-ray * Neurological conditions influencing walking pattern * Inability to walk without walking aid preoperatively * Rheumatoid arthritis (RA) * Severe hip dysplasia * Cognitive impairment * Malignancies or metastases involving the hip joint or the nearby soft tissues * Inability to speak and write Dutch language