Study to Assess Exactech's Guided Personalized Surgery eGPS® in Total Knee Arthroplasty

Inclusion Criteria: * Patient requires a primary Optetrak Logic Total Knee Arthroplasty * Patient is skeletally mature with no obvious mechanical defect * Patient is mentally capable of completing follow-up visits * Patient is 18 years of age or greater at time of surgery * Patient will be available for follow-up out to 2 years * Patient has consented to participate in the clinical study Exclusion Criteria: * Patient has a mental or physical condition that may invalidate evaluation of the data * Patient is a prisoner * Surgery is contraindicated according to the applicable product package insert * Patient has a local or systemic infection * Patient has a known sensitivity to one or more of the materials in the knee replacement system to be used * Patient is pregnant