A primary total hip replacement can fail in about 15 to 20 years with loosening of implants or some other complications such as fracture or infection can happen.You will experience pain in the groin or thigh along with difficulty in weight bearing. You would need to see your doctor if such symptoms happen after primary total hip replacement.Your surgeon will evaluate you clinically and also arrange some investigations such as blood test X ray or CT scan or bone scan. Once the problem is identified you will be advised a revision surgery in order to bring your functions back,where the previous components will be removed and new implant will be introduced.