Radiographic Follow: up of Grafted Bone Used for Reconstruction of Deficient Acetabular Bone Stock in THR

Han, Hong Jun; Kim, Sang Soo; Chun, Churl Hong; Ko, Myoung Churl

Abstract

The purpose of this study is to evaluate the short-term results of the reconstruction of acetabular bone defect radiographically. Twenty three reconstruction with bone graft and non-cemented porous hemispherical cup and one reconstruction with bone graft and cemented polyethylene cup that had been performed in 24 patients from 1991 at Wonkwang University Hospital and had followed more than one year were included in this study. Osseous union, resorption of the graft, the amount of the migration and angle change of the acetabular components and radiolucency were checked on plain X-ray. 9 morselized grafts for contained defect showed 100% union within 6 months, without severe resorption and loosening. Of the 15 structural grafts, 11 minor column or shelf grafts showed 100% union and remodeling, and one case of radiolucency around the cup. There were two collapses of the structural graft and one migration of the cup which suggest the failure among the 4 major column grafts. For the above 3 failed cases, non-cemented porous hemispherical cups were used. In conclusion, bone graft for reconstruction of the deficient acetabular bone stock seems to be suc- cessful, but the use of cement and the delay of weight bearing should be considered for the major column graft.