Effect of fluoride varnish application on compomer restorations in primary teeth

Objective: The aim of this study was to evaluate the effect of topical fluoride varnish application on the conventional and colored compomer regarding surface roughness.
Methods: Class V cavities were prepared on the buccal surface of one hundred and twenty lower second primary molars. Teeth were divided into two main groups: group I (conventional compomer), Group II (colored compomer). Each main group was subdivided into two subgroups: control subgroup, application of distilled water, and test subgroup < sub>, application of fluoride varnish. Surface roughness was studied using 3D surface measurement using light sectioning vision system. Data was collected and statistically analyzed by SPSS software version 23.0.
Results: Surface roughness of conventional compomer was statistically significantly increased after application of fluoride varnish on their surface (p < 0.001). Surface roughness of colored compomer was statistically significantly increased after application of fluoride varnish p=0.005. There was no statistically significant difference between the surface roughness of colored and conventional compomer (p=0.4).
Conclusion: Both conventional and colored compomer restorations adversely affected with the application of fluoride varnish as its application caused increase in the surface roughness.