Continuum™ Metal Bearing System in Total Hip Arthroplasty

Inclusion Criteria: * Patient is 18 to 75 years of age, inclusive. * Patient is skeletally mature. * Patient qualifies for primary unilateral or bilateral total hip arthroplasty (THA) based on physical exam and medical history including the following: * Avascular necrosis (AVN) Osteoarthritis (OA) * Inflammatory arthritis (i.e. Rheumatoid arthritis) * Post-traumatic arthritis * Patient has no history of previous prosthetic replacement device (any type, including surface replacement arthroplasty, endoprosthesis, etc.) of the affected hip joint(s). * Patient has a Harris Hip Score \<70 in the affected hip * Patient is willing and able to provide written informed consent. * Patient is willing and able to cooperate in the required post-operative therapy. * Patient is willing and able to complete scheduled follow-up evaluations as described in the Informed Consent. * Patient has participated in the Informed Consent process and has signed the Ethics Committee approved informed consent. Exclusion Criteria: * The patient is: * A prisoner * Mentally incompetent or unable to understand what participation in the study entails * A known alcohol or drug abuser * Anticipated to be non-compliant. * The patient has a neuromuscular disorder, vascular disorder or other conditions that could contribute to prosthesis instability, prosthesis fixation failure, or complications in postoperative care. * The patient has a neurologic condition in the ipsilateral or contralateral lim…