Randomized controlled study comparing iASSIST Knee system versus conventional instrumentation

INTERVENTION: Persona TKA with iASSIST Knee as the Investigational group Persona TKA with conventional instrumentation and without iASSIST Knee as the Control group CONDITION: Knee Joint Diseases PRIMARY OUTCOME: The alignment accuracy of the knee femoral and tibial components at 6 months for the investigational group compared to the control group. SECONDARY OUTCOME: Health Status after TKA, Operating Room efficiency and Complication rate after TKA for the investigational group compared to the control group. INCLUSION CRITERIA: ‐ Knee Osteoarthritis (varus deformity only) ‐ Subjects willing to return for follow‐up evaluations