Abstract
Introduction and Aims: We undertook this study to detemine the results of acetabular fixation using the Duraloc 300 uncemented acetabular component combined with impaction bone grafting in patients with acetabular protrusion.
Method: Thirty consecutive total hip replacements using a Duraloc 300 cup in patients with acetabular protrusion requiring impaction bone grafting were reviewed at an average of 5.2 years. Pre-operative x-rays were analysed for degree of protrusion. Post-operative x-rays were analysed for cup placement and interface gaps. Follow-up films were analysed for graft incorporation, lucent lines, osteolysis, wear and migration. Kaplan-Meier survivorship analysis was performed.
Results: All components were found to be stable with no evidence of loosening or migration. All but two cases showed trabeculated bone with an average minimum thickness of 7mm of bone medial to the cup in zone 2. Mean rate of wear was 0.10mm per year. No cases of pelvic osteolysis were seen.
Conclusion: The Duraloc 300 cup provides excellent fixation in patients with acetabular protrusion and impaction bone grafting. The graft has been found to incorporate and remodel. We are therefore optimistic that the durability of fixation should equal that of primary hip surgery without protrusion.
These abstracts were prepared by Editorial Secretary, George Sikorski. Correspondence should be addressed to Australian Orthopaedic Association, Ground Floor, The William Bland Centre, 229 Macquarie Street, Sydney, NSW 2000, Australia.
At least one of the authors is receiving or has received material benefits or support from a commercial source.
