Reconstruction of Paprosky type ⅢB acetabular bone defects using a cup-on-cup technique: A surgical technique and case series  

作　　者：Yin-Qiao Du Yu-Ping Liu Jing-Yang Sun Ming Ni Yong-Gang Zhou 

机构地区：[1]Department of Orthopedics,Chinese People’s Liberation Army General Hospital,Beijing 100853,China [2]Department of Orthopedics,Tengzhou Central People’s Hospital,Tengzhou 277500,Shandong Province,China

出　　处：《World Journal of Clinical Cases》2020年第7期1223-1231,共9页世界临床病例杂志

基　　金：National Key Research and Development Program of China,No.2017YFB1104104.

摘　　要：BACKGROUND Paprosky type ⅢB acetabular bone defects are very difficult to reconstruct.For severe defects,we developed our own cup-on-cup technique.We defined the tantalum metal (TM) revision shell with the peripheral titanium ring removed as a TM-cup augment and the cementless hemispherical acetabulum component combined with a TM-cup augment as the cup-on-cup technique.AIM To report the short-term results of patients with typeⅢB acetabular bone defects reconstructed using the cup-on-cup technique.METHODS We retrospectively reviewed six patients (six hips) with a mean age of 59 years who underwent acetabular reconstruction using our cup-on-cup technique between January 2015 and January 2017.All acetabular bone defects were classified as typeⅢB without pelvic discontinuity using the system of Paprosky All patients were followed both clinically and radiographically for a mean duration of 42 mo.RESULTS The mean Harris hip score improved from 32.4 pre-operatively to 80.7 at the last follow-up.The mean vertical position of the hip rotation centre changed from60.9 mm pre-operatively to 31.7 mm post-operatively,and the mean horizontal position changed from 33.6 mm pre-operatively to 38.9 mm post-operatively.Greater trochanteric migration after extended trochanteric osteotomy occurred in one of six hips at 3 mo.There was no evidence of component migration at the last follow-up.CONCLUSION The short-term results suggest that our cup-on-cup technique could beconsidered an effective management option for Paprosky type ⅢB acetabular bone defects without pelvic discontinuity.

关 键 词：Total hip ARTHROPLASTY TRABECULAR metal Cup-on-cup Bone defect 

分 类 号：R687.3[医药卫生—骨科学]