Effect of Abrasive Containing Whitening Dentifrices on Surface Characteristics and Color Stability of Two Aesthetic Restorative Materials

Abstract

surface characteristics and color Stability of two aesthetic restorative materials. Materials and Methods: A total of 180 specimen were prepared from two tested materials (Filtek Z350 resin composite and Equia forte glass ionomer with nano filled coat).The specimen were divided into three groups (n=60). Group 1: hydrated silica containing tooth paste Group 2: calcium carbonate containing tooth paste, Group 3: trisodium phosphate containing tooth paste, each group was subdivided into two subgroups according to number of brushing duration (1120, 2240) cycles (n=15).Each subgroup was further subdivided into three divisions according to the type of test performed (micro hardness, surface roughness, color stability) (n=5). All tests were done before and after brushing then the data were statistically analysed. Results: Baseline results revealed that resin composite has higher micro hardness, lower surface roughness and more color stability compared to glass ionomer. Regarding the effect of tooth paste; trisodium phosphate containing tooth paste recorded the higher micro hardness, lower surface roughness and more color stability among all tested groups. On other hand, brushing for eight weeks (2240cycles) showed significant decrease in micro hardness, increase in both surfaces roughness and color instability. Conclusion: Abrasive containing whitening dentifrices and number of brushing cycles have an influential effect on surface characteristics and color stability of composite and glass ionomer.