RESULTS AFTER PREOPERATIVE TRACTION AND PINNING IN SLIPPED CAPITAL FEMORAL EPIPHYSIS - K-WIRES VERSUS CANNULATED SCREWS

We have retrospectively reviewed 53 cases (62 hips) with a diagnosis o f slipped capital femoral epiphysis. After admission to our Hospital, a skin longitudinal traction was applied for 2 weeks. All patients wer e treated afterward with pinning in situ without manipulation in the o perating room. Group A (31 hips) consisted of patients treated with sm ooth K wires and group B (31 hips) of patients treated with cannulated screws. We found a high incidence of pin penetration in group A (27 h ips), whereas there was just one case in group B. Physeal closure was considered when 75% of proximal growth plate disappeared in the frog l ateral view and both groups showed similar values (7 months). Chondrol ysis was observed in just three cases in group A, and one case had an avascular necrosis. Few complications were observed compared with the high rate of pin penetration, and we suggest that preoperative tractio n may be a relevant factor contributing to the low incidence of avascu lar necrosis (1,6%).