[Osteochondritis dissecans of the knee]

For more than 10 years the authors have had a rather differentiated attitude to osteochondritis dissecans. The indication depends on the age, topography of the lesion, its volume and stage of evolution. The results of three techniques are discussed: simple ablation of the sequestrum, re-implantation of the sequestrum after treatment of the niche and cortico-spongiosa grafting.