Comparison of Surface Roughness of Two Single Shaded Resin Composites After pH cycling and Simulated Teeth Brushing - an in-Vitro Study

Abstract

Background: New single-shade composites enhance color blending with the surrounding environment. However, data on their performance after pH cycling and simulated teeth brushing is limited.
Aim: To examine and compare the surface roughness of two single-shaded resin composites after pH cycling and simulated toothbrushing.
Methodology: Forty disc-shaped composite specimens were fabricated using Teflon mold and divided into two main groups (C1: Omnichroma, C2: Charisma Topaz One) according to the resin composite utilized (n=20). After finishing and polishing, the baseline surface roughness was measured using a non-contact profilometer. The specimens were then immersed in demineralization-remineralization solutions at room temperature followed by another surface roughness measurement. Subsequently, all specimens underwent simulated teeth brushing and received a final surface roughness measurement.
Results: Charisma Topaz One exhibited significantly higher initial surface roughness values compared to Omnichroma. However, after pH cycling and simulated tooth brushing, no significant differences in surface roughness were observed between the two materials.
Conclusions: Although Omnichroma demonstrated superior initial smoothness compared to Charisma Topaz One, both restorative materials exhibited comparable performance after pH cycling and simulated tooth brushing. The surface roughness is influenced significantly by the aging method.