Using ROSA for Challenging The TKA Standard of Care

Inclusion Criteria: * Symptomatic osteoarthritis of the knee indicating primary total knee arthroplasty * Varus knee deformity of 0 to 10 degrees * Sufficient ligamentous function to warrant retention of the posterior cruciate ligament * Between the ages of 21 and 80 inclusive * Patients willing and able to comply with follow-up requirements and self-evaluations * Ability to give informed consent Exclusion Criteria: * Active or prior infection * Medical condition precluding major surgery * Predominantly inflammatory arthropathy * Patellectomy * PCL deficiency * Major coronal plane deformity * Prior trauma to the tibia or femur resulting in malalignment, canal occlusion, or open reduction and internal fixation * Valgus alignment * Neurologic condition limiting mobility * Bone defects requiring augments, cones and/or stemmed implants * Intraoperative findings of insufficient contact between the implant and the bone surface * Body Mass Index of 40 or more