Survivorship and Outcomes of Robotic-Arm Assisted Bicompartmental Arthroplasty

Inclusion Criteria: * All patients over 21 years of age who underwent robotic-arm assisted medial bicompartmental arthroplasty by the investigating surgeon and received MCK implants and are at least 24 months post-operative. * Patient has signed an IRB approved Informed Consent Form or with IRB approved waiver of written signed consent, patient has verbally consented to study participation. * Patient is willing to comply with follow up Exclusion Criteria: * Patients will be excluded from participation in the study if they are cognitively unable to answer questions related to their index procedure and health quality of life forms. * Patient had active infection * Implants were implanted without bone cement * Patients did not have sufficient bone stock to allow for insertion and fixation of components * Patient did not have sufficient soft tissue integrity to allow for stability * Patient had a neurological or muscular deformity that did not allow for control of the knee.