Vanguard Rocc Post Market Surveillance

Inclusion Criteria: Inclusion criteria should be in accordance with Indications for Use for Vanguard-ROCC® Knee System specifically: * Painful and disabled knee joint resulting from osteoarthritis, rheumatoid arthritis, traumatic arthritis where one or more compartments are involved. * Correction of varus, valgus, or posttraumatic deformity. * Correction or revision of unsuccessful osteotomy, or arthrodesis. Additional inclusion criteria include: * Male or female. * 18 years of age or older * Subjects willing to return for follow-up evaluations Exclusion Criteria: Exclusion criteria should be in accordance with Absolute and Relative Contraindications for Use for Vanguard-ROCC Knee system: Absolute contraindications include: infection, sepsis, osteomyelitis, and failure of a previous joint replacement. Relative contraindications include: * Uncooperative patient or patient with neurologic disorders who are incapable of following directions, * Osteoporosis, * Metabolic disorders which may impair bone formation, * Osteomalacia, * Distant foci of infections which may spread to the implant site, * Rapid joint destruction, marked bone loss or bone resorption apparent on roentgenogram, * Vascular insufficiency, muscular atrophy, neuromuscular disease, * Incomplete or deficient soft tissue surrounding the knee.