Background: The aim of the present study was to compare bulk-filled composite resins with conventional composites in terms of cuspal movement and micro-leakage scores.
Methods: Ninety-six maxillary premolar teeth with mesial-occclusal-distal cavities were allocated to four groups. Twelve teeth in each group was treated etch-and-rinse, self-etch or selective-etch (N.=8) protocols with respective adhesive system. Bucco-palatal cusp measurements were performed before and after preparation, and 180s after curing and then subjected to 5000 thermocyclws. After immersed in 0.2% basic fuchsin dye for 24h, cervical micro-leakage was evaluated. The data was analyzed by One-way ANOVA and post-hoc Tukey's honest Test (P<0.05).
Results: All groups and bonding protocols revealed no significant differences in total cuspal deflection measurement and micro-leakage scores. After preparation, a significant increase was found in bucco-palatal width of the teeth compared to baseline (P=0.002). There were no significant relationship among composite resins and adhesives (P>0.05).
Conclusions: Cuspal relief after cavity preparation should be taken into account when evaluating deflection.
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| http://dx.doi.org/10.23736/S0026-4970.20.04303-4 | DOI Listing |
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