[Current study on classification of bone deficiency in the revision of total hip replacement]

In the revisions of total hip replacement, the classification of the bone deficiency includes both the acetabular and the femur. That classification of the acetabular bone deficiency includes the classification of Paprosky, Engh, Gross, Gustilo and Pasternak, Chongqing, and so on. That classification of the femoral bone deficiency includes AAOS, Paprosky, Mallory, and modified Mallory. All of the classification is not consistent for peroperative evaluation. As to the confusion, it is necessity to do more researches.