Comparison of the modified Smith-Petersen (S-P) and ilioinguinal (I-I) approaches for periacetabular osteotomy in adult developmental dysplasia of the hip: a retrospective study

Background: Adult developmental dysplasia of the hip is an untreated congenital hip dysplasia that results in adult hip pain in adults. One of the usual and effective methods for the treatment of this condition is periacetabular osteotomy. However, controversy on which approach is better between the modified S-P and the I-I approaches is still unclear and ununified. Method and materials we retrospectively assessed our experience with the modified S-P and the I-I approaches by inquiring and evaluating of intraoperative blood loss, postoperative radiographic material, postoperative function of hip and related complications from July 2014 to January 2019. Results A total of 61 patients with adult developmental dysplasia of the hip were enrolled, and 33 patients were divided into group modified S-P and 28 patients were divided into group I-I. The operation time and blood loss of group I-I were higher than that of group modified S-P. other clinical and radiographic indexes showed no statistical significance between group modified S-P and group I-I. Conclusion There is no significant difference improving the function of the hip at the post-operation stage, but group I-I may require more operation time and blood loss at the intra-operation stage.