Post Market Clinical Follow-up Study Protocol for PROFEMUR® Xm Femoral Stems

Inclusion Criteria: * Subject previously underwent / is a candidate for primary THA for any of the following: * Non-inflammatory degenerative joint disease such as osteoarthritis, avascular necrosis, ankylosis, protrusio acetabuli, or painful hip dysplasia * Inflammatory degenerative joint disease such as rheumatoid arthritis; or * Correction of functional deformity * Subject has been previously implanted / is a candidate to be implanted with the specified combination of components * Subject is willing and able to complete required study visits or assessments * Not previously implanted subject is able to undergo primary THA procedure Previously implanted bilateral subjects can have both THAs enrolled in the study provided: * the specified combination of components were implanted in both * all other aspects of the Inclusion/Exclusion Criteria are satisfied * enrollment does not exceed the subject count specified in the Clinical Trial Agreement * the subject agrees to a second Informed Consent document specific to the second THA Prospective enrollment of a previously unimplanted contralateral hip is permitted in this study provided: * it occurs not more than two years after the index THA * the specified combination of components is used * all other aspects of the Inclusion/Exclusion Criteria are satisfied * enrollment does not exceed the subject count specified in the Clinical Trial Agreement * the subject agrees to a second Informed Consent document specific to the second THA Exclusion Criteria: * Subject is skeletally immature (less than 21 years of age) at time of primary THA surgery * Subject is currently enrolled in another clinical study which could affect the endpoints of this protocol * Subject is unwilling to sign the Informed Consent document * Subject has substance abuse issues * Subject is incarcerated or has pending incarceration * Subject is anticipated to require a contralateral THA less than 1 year after the index THA on the enrolled hip In addition, not previously implanted subjects will be excluded if they meet any of the following criteria: * Subject has any of the following contraindications at the time of implantation * Overt infection * Distant foci of infections (which may cause hematogenous spread to the implant site) * Rapid disease progression as manifested by joint destruction or bone absorption apparent on roentgenogram * 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 * Neuropathic joints * Hepatitis or HIV infection * Neurological or musculoskeletal disease that may adversely affect gait or weight-bearing