Effect of three types of mouth rinses and human saliva on color stability of packable and nanocomposite resins : in vitro study

الملخص EN

Background : The purpose of this an in vitro study was to evaluate and compare the influence of three types of mouth rinses (alcohol- containing, alcohol-free and chlorhexidine-containing mouth rinses) and human saliva on color stability of two types of composite resins (packable and nanofilled composite).

Materials and Methods : Total number of 64 specimens were prepared and divided according to type of composite resins used, into two groups: 32 specimens made from packable P60 and 32 specimens made from Filtek Supreme XT nanocomposite.

Then each 32 specimens subdivided into 4 subgroups according to treatment solutions used.

Each subgroup of specimens was immersed, after curing, in distilled water for 24hr at 37°C then subjected to color measurement for baseline readings determination.

Then each subgroup was immersed in 20 ml of treatment solutions and incubated at 37°C for 24 hr and re-subjected to color measurement.

The change in color difference was calculated for each specimen.

The resulting data were statistically analyzed using ANOVA and t- test at 0.05 significance level.

Results : The results revealed that all tested solutions produced color change in both tested resin composite.

However, the greatest perceptible color change was observed on using mouth rinses with low PH.

Conclusion : Both alcohol-containing and alcohol-free mouth rinses causes perceptible color change of composite resins, while saliva causes non perceptible color change of both composite resins.

The color change was perceptible in nanocomposite and non perceptible in packable composite with Chlorhexidine-containing mouths rinses.