Evaluation of Locomotor Activity Before and After Total Hip Replacement in Patients With Hip Osteoarthritis.

Inclusion Criteria:

Control group:

• Subjects who have provided written informed consent
• Subjects covered by the national health insurance scheme
• Men or women aged between 25 and 85 years
• able to understand simple instructions and packaging instructions and able to give informed consent

Patients group:

• Patients who have provided written informed consent
• Patients covered by the national health insurance scheme
• Men or women aged between 25 and 85 years
• able to understand simple instructions and packaging instructions and to give their informed consent
• Suffering from hip osteoarthritis defined according to ACR criteria
• Most recent radiography examination less than 6 months earlier
• Radiological stage II, III or IV hip osteoarthritis according to the Kellgren and Lawrence classification
• Presenting with an indication for total hip replacement, according to the surgeon's usual criteria

Exclusion Criteria:

Control group:

• Hip osteoarthritis or other arthrosis in the lower limbs
• Pregnant or breast-feeding women
• Disorders that may interfere with gait analysis
• Disorder that may be destabilized by gait analysis
• Neurological disease and/or motor neuron disease

Patients group:

• Contra-indication for total hip replacement
• Repeat surgery for total hip replacement
• Impossibility to use a standard implant
• Pregnant or breast-feeding women
• Inflammatory flare of the hip osteoarthritis
• Disorder that may interfere with gait analysis
• Disorder that may be destabilized by gait analysis
• Rapidly destructive hip osteoarthritis
• Neurological disease and/or motor neuron disease
• Hip dysplasia requiring THR to be completed using a graft