Lower re-revision rates after UKA-to-TKA than UKA-to-UKA revision for failed medial unicompartmental knee arthroplasty at mid-term follow-up. - Koch KA; Freytag J; Hariri M; Trefzer R; Mick P; Lunz A; Walker T; Weishorn J (Journal of experimental orthopaedics, 2026)