Prediction of final radiological results in early childhood after closed reduction for congenital dislocation of the hip.

概要

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In order to find a radiological measurement which can predict final radiological or anatomical results in early childhood, we have reviewed the serial radiographs of 37 hips in 33 children treated by manual reduction for congenital dislocation of the hip. All had been followed until at least 10 years old without operative intervention and had no apparent deformity of the femoral head at final visit. Final radiological results were judged by using Severin's classification; group I and II as good, and others as poor.OE angle and acetabular index were found to be good predictors. Prediction of cases with final good results was possible from 1 year old by acetabular index and from 2 years old by OE angle. The cases with final poor results could also be predicted by OE angle and acetabular index in combination. The values of OE angle and acetabular index for prediction at each age of infancy were obtained. Age or arthrographic finding at reduction, by themselves, was not a suitable parameter for prediction, because they were not correlated with the final results.