Abstract
1. Thirty-three patients who had had stapling of the lower femoral and upper tibial epiphysis to correct inequality of the leg lengths were reviewed after maturity. The staples were inserted so that correction of the disparity would coincide with termination of growth.
2. The predicted corrections were found to be inaccurate. The error was 47 per cent in girls operated on between ten and twelve and 51 per cent in boys between ten and thirteen. In older children the prediction was more accurate.
3. Despite the inaccuracy of prediction only four patients were left with shortening of more than 3·5 centimetres.
4. Complications of the operation were deformity, ligamentous laxity, subjective symptoms and necessity for further operation.
5. Only one girl had a serious deformity–genu recurvatum of 25 degrees. Half the patients had minor degrees of hyperextension.
6. The causes of the complications are discussed and suggestions made how their incidence might be reduced.
7. It is concluded that the operation of stapling the epiphyses around the knee of the long leg has a small but useful part to play in the correction of inequality of leg lengths. It should be confined to tall boys over thirteen and girls over twelve.
