This retrospective, monocentric study is about outcomes concerning patients who benefit from medial unicompartmental knee arthroplasty after previous high tibial osteotomy. This previous high tibial osteotomy was performed because of genu varum.

Clinical, funtionnal and radiological outcomes were examined.

Inclusion Criteria:

• operated between January 2005 and June 2019
• HTO followed by implantation of medial UKA (Oxford Partial Knee, Zimmer Biomet, Bridgend, UK) in the same knee
• medial knee osteoarthritis with healthy lateral compartment
• patellofemoral pain
• coronal plane deformity of less than 15°

Exclusion Criteria:

• death
• lost to follow-up
• medial UKA implant other than the Oxford Partial Knee

patients aged of at least18 years old, who benefit from medial unicompartmental knee arthroplasty after previous high tibial osteotomy. The high tibial osteotomy was made because of genu varum.

All collected data that underlie results in a publication

Data will be available after the publication of result and ending five years maximum following the last visit of the last patient

Data access requests will be reviewed by the internal committee of Brest UH. requestors will be required to sign and complete a data access agreement