Method: A control blend was made with TEGDMA (mass fraction, 75%) and BisEMA (mass fraction, 25%). To the control blend were added five bioactive fillers (mass fraction, 10%): amorphous calcium phosphate (ACP), Hydroxyapatite (Hap), silicate 45S5 bioactive glass (BAG 45S5), Zn Bioactive glass (BAG-Zn), and betaTCP-Zn. The surface roughness (Ra) of each specimen (n=10) was measured before and after 30,000 brushing cycles. The degree of conversion (DC) was analyzed using Fourier transform infrared spectroscopy (FTIR). Data of DC were submitted to one-way ANOVA and Tukey’s test (α=0.05). Roughness data were submitted to repeated measure ANOVA and Tukey’s test (α=0.05).
Result: Control group (36.3%) showed DC significantly lower than ACP (50.4%), Hap (49.7%), BAG-Zn (54.4%), BAG-45S5 (48.3%), and betaTCP-Zn (53.5%). Roughness (μm) of ACP (0.1666) before brushing was significantly lower than BAG-45S5 (0.3567), Hap (0.3476), and betaTCP-Zn (0.3451). After brushing, roughness of betaTCP-Zn (0.5903) was significantly higher than control (0.3646), Hap (0.3436), BAG-Zn (0.2728), and ACP (0.0843). Brushing cycles significantly increased roughness only for betaTCP-Zn.
Conclusion:
bioactive fillers increased the degree of conversion of resin infiltrants. The lowest surface roughness was showed by resin infiltrant with addition of ACP. Most of resin infiltrant with addition of bioactive fillers showed resistance to abrasion.