Abstract
This study evaluates the influence of a number of variables on the retention of resinbonded fixed partial dentures (RB-FPDs) under controlled clinical conditions. A total of 203 RB-FPDs were inserted in 183 patients under standardized clinical conditions. During the follow-up period (1·6 years) there were 23 dislodgements resulting in a success rate of 89 per cent. A number of RB-FPDs failed at the resin/retainer interface ( n = 12) or by cohesive fracture ( n = 8) of the luting resin cement. The variables tested in this study showed no significant influence on the short-term success rate ratio of the RB-FPDs with the exception of the variable ‘location of the RB-FPD’. Posterior RB-FPDs had the worst prognosis, anterior RB-FPDs revealed the best results, and cuspid (canine) RB-FPDs were intermediate. The variables ‘type of retainer’ and ‘cementation material’ as well as the variables ‘restoration level’, ‘mobility’, ‘length of the RB-FPDs’ and ‘occlusion on the RB-FPD’ showed no association with the short-term retention rate of the RB-FPDs.
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