Redislocation of the femoral head may be occured after its operative reduction in the congenital dislocation of the hip, therefore, it is greatly important to disclose the causes of the redislocation in order to avoid this every complication and improve the curative effect of this operation. Seven cases of redislocation from 106 cases (128 sides) of the congenital dislocation of the hip which had been reduced operatively were studied with relative measurements of the hip joints on roentgenogram, associated their pathologic conditions described in operation. The results showed that, in these cases, there were (0.843 +/- 0.692) cm upward displacement of the femoral head beyond the horizontal Y line, (68.86 +/- 0.692) degree of the femoral anteversion, the more lateral displacement of the femoral head compared to the opposite side and the acetabular index increasing up to (33.86 +/- 3.72) degree from (26.14 +/- 2.73) degree of the operative correction. These phenomena indicate that the redislocation after operative reduction of the femoral head in congenital dislocation of the hip is mainly related to four causes which include the existence of large pressure between acetabulum and femoral head, the uncorrected abnormal femoral anteversion, the residue of the pathologic tissues in the acetabulum and the reascending of the acetabular index having been corrected in operation.
Twelve cases (13 hips) of congenital dislocation of hip (CDH)in a group above the age of six were treated by Chiari pelvic osteotomy from Jan. 1991 to Dec. 1992. The results following operative treatment rated as good in 85 percents according to the clinical and radiologic examinations. The indications, and the results with the operation as the functional reconstuction of the hip concerned were discussed.
Acetabuloplasty was used to treat 62 cases (76 hips) of congenital dislocation of hip in older children, with a period of follow-up for 1 to 7 years. The good results from operation rated 81.7 percent. It was considered that this type of operation could fulfil the physiological requirements, as the femoral head replaced into the acetabulum would accomplish the following benefits from establishing a stable joint, reducing the lumbar lordosis and minimizing development of hip and low back pain. The technique ...