THE EFFECT OF RESORBABLE VERSUS NON RESORBABLE CEMENTRESTRICTOR (CR) ON MIGRATION AND CEMENTATION QUALITY IN TOTAL HIP ARTHROPLASTY(THA) – A PROSPECTIVE RANDOMIZED STUDY

Introduction: The purpose of this prospective randomized is to compare a resorbable versus a non resorbable CR regarding restrictor migration and cementation quality in cemented THA. Materials and Methods: 91 patients were randomized to either a resorbable Imset(Aesculap) or a non-resorbable Hardinge (De Puy) CR. Surgery and postoperative regime were identical in the two groups. CR-migration during cementation and stem insertion was calculated and the quality of cementation was evaluated on the post-operative X-ray according to the criteria by Barrack et Al(1) Mean values are presented with 95% CI. An unpaired T-test was used to analyse the differences in CR migration and the quality of cementation quality. Results: The mean CR-migration in the Imset group was 9.8mm(CI: 6.1mm-13.5mm) compared with 3.7mm (CI: 1.8mm-5.5mm) in the Hardinge group (P=0.042) Regarding quality of cementation the mean value in the Imset group were 2.8 which was significantly better in the Hardinge group=2.1 (P=0.003) Conclusion: The resorbable CR was associated with significantly greater migration and inferior quality of cementation compared with our standard non-resorbable restrictor.