Abstract
1. The importance of recognising osteochondral fractures of the femoral condyle in the adolescent knee joint is emphasised.
2. The mechanism of the formation of the fractures is discussed. Essentially, a powerful rotary and compressive force shears off cartilage and subchondral bone. The absence of lateral condylar lesions in the experimental group lends support to the theory that the patella may cause the fracture by impingement.
3. On the basis of the mechanism a clinical classification of osteochondral fractures of the femoral condyles is presented.
4. Early surgery is recommended. The arguments for removal or replacement of the fragment are discussed.
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