Effects of coffee immersion on translucency of high-strength flowable composites under simulated toothbrushing condition: an in vitro study

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Keerati Tiptimaphan
Sirichan Chiaraputt
Apirat Ritthiti


Objectives: This study aims to evaluate the effects of consuming coffee on the translucency of high-strength flowable composites under simulated toothbrushing conditions.

Materials and Methods: Ninety cylindrical specimens were prepared using three types of resin composites: (1) Filtek™ Z350XT (Z); (2) Filtek™ Supreme Flowable (F); (3) G-ænial™ Universal Injectable (G) (diameter 6 mm, thickness 2 mm). 30 specimens of each type were prepared, which then were divided into three subgroups of ten based on testing conditions: artificial saliva (S), coffee (C), and simulated toothbrushing before immersion in coffee (BC). All groups were immersed in their respective solutions at 37°C for 28 days. Translucency parameter (TP) measurements were performed before and after immersion for 7 days and 28 days (triplicate). Three-way repeated ANOVA and Bonferroni statistical tests were applied to the observation data set.

Results: The mean TP of ZC, ZBC, FC, and FBC groups significantly changed after immersion for 7 days, whereas the other groups showed that the TP did not significantly differ from that before immersion. The mean TP difference of groups ZC and FBC was greater than the perceptibility translucency thresholds at day 7. All subgroups of G had TP within the perceptibility translucency thresholds at 7 and 28 days.

Conclusions: Immersion in coffee had no effect on the translucency of G-ænial™ Universal Injectable after 7 or 28 days. G-ænial™ Universal Injectable were found to have suffered the least change in their translucency compared to Filtek™ Z350XT and Filtek™ Supreme Flowable.


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Tiptimaphan K, Chiaraputt S, Ritthiti A. Effects of coffee immersion on translucency of high-strength flowable composites under simulated toothbrushing condition: an in vitro study. M Dent J [Internet]. 2023 Oct. 24 [cited 2023 Nov. 29];43(suppl):S89-S96. Available from: https://he02.tci-thaijo.org/index.php/mdentjournal/article/view/264763
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