Prospective, multicentre, non controled, non randomised, clinical study to assess the performance and the stability of SMS femoral stem

Inclusion Criteria:

• Patient suffering from a severely painful and/or disabling hip joint due to osteoarthritis, traumatic arthritis, developmental dysplasia of the hip, or avascular necrosis of the femoral head, and requiring a total hip replacement.
• Patient who will receive a Medacta SMS femoral stem.
• Patient agrees to comply with the study requirements.
• Patient has signed the consent form.
• Patient is affiliated with a social security system.
• Patient aged 18 to 75 years

Exclusion Criteria:

• Participation in biomedical research.
• Minor patient.
• Protected adult patient.
• Vulnerable individuals as defined by Article L1121-6 of the Public Health Code.
• Pregnant or breastfeeding women.
• Patient unable to express their non-opposition.
• Patient refusing the collection of their personal data.
• Acute, systemic, or chronic infection. Skeletal immaturity.
• Grossly deformed anatomy (at the surgeon's discretion).
• Osteomalacia for which the fixation of an uncemented implant is contraindicated.
• Patient suffering from active rheumatoid arthritis or osteoporosis.
• Patient with metabolic disorders likely to impair bone formation when the fixation of an uncemented implant is contraindicated.
• Patient suffering from muscle atrophy or neuromuscular disease.
• Patient with an allergy to the implant material.
• Any patient who cannot or does not wish to give their informed consent to participate in the study.
• Patient whose prospects of regaining independent mobility would be compromised by known coexisting medical problems.
• Any contraindication mentioned in the instructions for use of the investigational medical device.

Patients suffering from a severely painful and/or disabling hip joint (osteoarthritis, traumatic arthritis, developmental dysplasia of the hip, avascular necrosis of the femoral head) requiring a total hip prosthesis and who will receive a Medacta SMS femoral stem.

Patients will be able to participate in other non-interventional research for the duration of the study.