Effect of cusp coverage and water storage on compressive strength of composite restorations of premolars

2018

Background The aim of this study was to assess the effect of cusp coverage and water storage on compressive strength of composite restorations. Material and Methods This in vitro experimental study was conducted on 40 extracted human maxillary premolar teeth, which were randomly divided into four groups of 10. Mesio-occluso-distal (MOD) cavities were prepared in all teeth. The thickness of composite for cusp coverage was 1.5 mm in groups 1 and 3 and 2.5 mm in groups 2 and 4. Compressive strength (CS) was measured after 24 hours in groups 1 and 2 and after six months of water storage in groups 3 and 4. Two-way ANOVA was used to statistically analyze the data. Results The mean and standard er…