Effect of Staining and Bleaching on Color stability and Surface Roughness of Three Resin Composites: An in vitro study

Aim: This study evaluated the effect of staining and subsequent bleaching on the color stability and surface roughness of three resin composites. Materials and Methods: One hundred and eight customized plastic disks from a plastic mold with an outer diameter of 10 mm and thickness of 1.02 mm were fabricated. Samples were divided into three groups of 36 specimens each -Group I (Estelite (R) alpha-Supranano), Group II (Filtek T Z250 XT -Nanohybrid), and Group III (Filtek (TM) P90-Silorane). Subsequently, baseline surface color and roughness values were tabulated using spectrophotometer and profilometer, respectively. The specimens were then subjected to staining with coffee and turmeric for a period of 3 h/day for 40 days and following this, bleaching of the samples was done using a bleaching agent carbamide peroxide gel 15% for 8 h/day for 14 consecutive days. Results: Estelite (R) a performed better by maintaining color stability with minimal roughness compared to Filtek T P90 and Filtek T Z250 XT. Turmeric had a greater potential to stain composites compared to coffee in all the groups.