Factors responsible for the development of avascular necrosis secondary to the treatment of congenital dislocation of the hip.

We present 104 cases of unilateral congenital dislocation of the hip treated with the same regime between 1977 and 1988. The patients had an average age of 12 months (range 4-24). The average age at follow-up was 6 years (range 3-13).

Fractures of the proximal humeral epiphysis.

Twenty-two patients with marked displacement of a fracture of the proximal humeral epiphysis have been treated with closed or open reduction and fixation by Kirschner wires. At an average follow-up of 6.8 years there have been good functional results in almost all patients (91.