Robotic Assisted vs Custom Made Total Knee Arthroplasty

Inclusion Criteria: * \- The patient is a male or non-pregnant female between the ages of 40 and 90 years * The patient requires a primary total knee replacement * Patient is deemed appropriate for a cruciate retaining knee replacement * The patient has a primary diagnosis of osteoarthritis (OA) * The patient has intact collateral ligaments * The patient is able to undergo CT scanning of the affected limb * The patient has signed the study specific, ethics-approved, informed consent document * The patient is willing and able to comply with the specified pre-operative and post-operative clinical and radiographic evaluations Exclusion Criteria: * \- The patient has a history of total, unicompartmental reconstruction or fusion of the affected joint * Patient has had a previous osteotomy around the knee * The patient is morbidly obese (BMI \> 41) * The patient has a deformity which will require the use of stems, wedges or augments * The patient has a varus deformity ≥ 15° * The patient has a valgus deformity \>3° * The patient has a neuromuscular or neurosensory deficiency, which would limit the ability to assess the performance of the device * The patient is unable to speak German * The patient is pregnant