Impaction bone grafting of the acetabulum at hip revision using a mix of bone chips and a biphasic porous ceramic bone graft substitute: Good outcome in 43 patients followed for a mean of 2 years

Background and purpose One of the greatest problems of revision hip arthroplasty is dealing with lost bone stock. Good results have been obtained with impaction grafting of allograft bone. However, there have been problems of infection, reproducibility, antigenicity, stability, availability of bone, and cost. Thus, alternatives to allograft have been sought. BoneSave is a biphasic porous ceramic specifically designed for use in impaction grafting. BoneSave is 80% tricalcium phosphate and 20% hydroxyapatite. Previous in vitro and in vivo studies have yielded good results using mixtures of allograft and BoneSave, when compared with allograft alone. This study is the first reported human clinical trial of BoneSave in impaction grafting

Hip replacement of the ovine hip with a zero dislocation rate

Ovine and caprine animals are frequently used as in vivo models for both total hip replacement and hemiarthroplasty, Historically the complication rate, particularly the dislocation rate, has been high. In studies involving animals it is imperative to keep complications to a minimum, both to reduce the distress of the individual animals, and also to keep the number of animals used in each study to the absolute minimum required.We describe an approach that has had a dislocation rate of zero out of 69 hips (mean follow-up 11 months). The authors recommend this approach in ovine and caprine studies of the hip joint