THE CLASSIFICATION AND RADIOGRAPHIC EVALUATION OF BONE LOSS IN REVISION HIP-ARTHROPLASTY

Many classification systems have been described over the past ten year s for bone loss which is found in association with the failed hip arth roplasty. Most are based on assessments of bone stock which are made i ntraoperatively. Good quality plain radiography is the most useful pre operative investigation and provides important information regarding t he residual bone stock. There is a need for critical appraisal of the validity of classification systems currently in use and the developmen t of a consensus system which will permit comparison between the publi shed results of different techniques.