Survivorship and Outcomes of Robotic-Arm Assisted Bicompartmental Arthroplasty

The purpose of the study is to determine the survivorship, patient satisfaction and clinical
outcomes of robotic-arm assisted medial bicompartmental knee arthroplasty using the MCK
implant system starting at two years post-operative and continuing for five, seven and ten
years post-operative.

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.