Effect of different mouthwashes on microhardness of photopolymerizable composite resins

Abstract Introduction In dentistry, resins are used as restorative materials for the reconstruction of aesthetics, function and shape of teeth. Aim To evaluate in vitro the microhardness of Filtek Z350 XT® and Filtek Z250 XT® resins subjected to direct contact when exposed to mouthwashes. Material and method Ten specimens were prepared in a nylon matrix in two increments and photoactivated for 20s. The homogeneity of the sample was verified through the Mann-Whitney and Kruskal-Wallis tests and a parametric variance was performed (ANOVA), and for Tukey significance analysis (α=5%). Result The highest mean value was presented by group G1 (Filtek Z350 XT- distilled water- control) – 138.22 (±21.8), and the least values were from group G9 (Filtek Z250 XT- Chamomile Solution) – 87.12 (±4.39) and the G10 group (Filtek Z250 XT – Pomegranate solution) – 99.32 (±11.10). Filtek Z350 XT resin was superior to Filtek Z250 XT (p=0.015). Conclusion Filtek Z350 XT resin presented better results than Filtek Z250 XT.