Fig. 1From: Plate-related results of opening wedge high tibial osteotomy with a carbon fiber reinforced poly-ether-ether-ketone (CF-PEEK) plate fixation: a retrospective case series of 346 kneesCartilage lesions in the medial knee compartment of the study patients. The cartilage lesions were classified according to the ICRS (International Cartilage Repair Society) Hyaline Cartilage Lesion Classification System (grades 1–4)Back to article page