[Comparison of the posterior hemipelvectomy of the greater trochanter approach with the standard Kocher-Langenbeck approach in the treatment of posterior acetabulum wall fractures].

To compare the clinical efficacy of the posterior hemipelvectomy of the greater trochanter approach with the standard Kocher-Langenbeck(K-L) approach in the treatment of posterior acetabulum wall fractures and to explore a more optimal approach for the treatment of posterior acetabulum wall fractures.