Minimally Invasive Knee Replacement Outcomes (MIKRO) Study

Inclusion Criteria: * Presence of severely symptomatic knee osteoarthritis that has failed non- operative treatment * Males and non-pregnant females, 35-85 years of age at the time of surgery * ASA class 1 or 2 * Procedure will not require computer navigation * Patient/Surgeon has not requested another implant * Patient has signed an IRB approved study consent form * Patient is able and willing to actively participate in post-operative rehabilitation program * Patient understands study requirements * Patient is willing to comply with follow-up visits and diary documentations * Patient is capable of independent ambulation Exclusion Criteria: * Skeletal immaturity * More than 10 degrees of valgus or varus deformity as measured from a weight bearing AP alignment view * Patients with bilateral knee osteoarthritis who are considering a simultaneous bilateral procedure * Bone or ligament insufficiency that requires the use of augments or stems, or constrained component * Daily pre-operative use of narcotic pain medication * Prior knee arthroplasty * Patient is a prisoner * Patient has had prior tibial tubercle osteotomy * Patient's surgical knee would require removal of hardware prior to TKA * Patient has \< 95 degrees flexion pre-operatively