Percutaneous pin fixation of chronic slipped capital femoral epiphysis.

Eighteen consecutive patients with 24 chronic-slipped capital femoral epiphyses were treated with percutaneous Knowles pin fixation. The average followup was 41 months (range, 21 to 64 months). All patients experienced complete closure of the growth plate within 12 months. There was no evidence of avascular necrosis, chondrolysis, slip progression, pin penetration, hardware failure, or intertrochanteric femoral fracture. Treatment of chronic slipped percutaneous pin is a safe and effective procedure.