SuperPath Versus Posterior Approach for THA

Inclusion Criteria: * Non-inflammatory degenerative joint disease including osteoarthritis, traumatic arthritis, or avascular necrosis; * Inflammatory degenerative joint disease including rheumatoid arthritis; * Correction of functional deformity. * Subject is skeletally mature (21 years of age or older); * Subject is a candidate to be implanted with the specified combination of components; * Subject is willing and able to complete required study visits and assessments; * Subject plans to be available through the follow-up visits; * Subject is willing to sign the approved informed consent document. * Subjects with a previous THA in the contralateral hip are eligible for enrollment provided it has been at least 1 year since the contralateral THA and the contralateral THA is asymptomatic and not pending revision. Simultaneous bilateral THA subjects will not be permitted to enroll. Exclusion Criteria: * Subject has overt infection or distant foci of infections; * Subject has rapid disease progression as manifested by joint destruction or bone absorption apparent on roentgenogram; * Subject with inadequate neuromuscular status (e.g. prior paralysis, fusion and/or inadequate abductor strength), poor bone stock, poor skin coverage around the joint which would make the procedure unjustifiable; * Subject has a neuropathic joints; * Subject has hepatitis or HIV infection; * Subject has a neurological or musculoskeletal disease that may adversely affect gait or weight-bearing; * Subject is currently enrolled in another clinical investigation that could affect the endpoints of this study; * Subject is unwilling or unable to sign the informed consent document; * Subject has documented substance abuse issues; * Subject has a body mass index (BMI) of greater than 40;