IADR Abstract Archives
Effect of Toothbrushing with a Dentifrice on Six Resin Composites
Objectives: This study examined the effect of 48,000 brushing cycles on 6 resin-based composites (RBCs).
Methods: The effect of toothbrushing on surface gloss and average roughness of Filtek™ Universal Restorative (3M), EsteliteΣQuick® (Tokuyama), Harmonize™ (Kerr™), TPH Spectra® ST HV (Dentsply Sirona), Activa™ Bioactive(Pulpdent), and Gradia® Direct (GC) after toothbrushing. Six precured disks of each RBC were abraded by hand using 600 grit sandpaper to achieve a uniform roughness. The RBCs were then brushed using Crest Regular Fluoride toothpaste, soft-bristled toothbrushes (GUM brand 495PC), and a load of 265 g. The toothbrushes were replaced after 24,000 cycles. Surface gloss was measured at the start and after 1,500, 6,000, 12,000, 24,000 and 48,000 brushing cycles. After 48,000 cycles, the surface of the RBCs was scanned using an atomic force microscope and the mean surface roughness (Ra) of the RBCs was calculated. Representative SEM pictures were also taken of the RBCs after 48,000 brushing cycles at 5,000x magnification. Results were analyzed by one-way ANOVA and Tukey post-hoc tests (a=0.05).
Results: Toothbrushing increased the gloss of all RBCs. Most of the increase occurred within the first 24,000 cycles. The 6 composites fell into two distinct and significantly different groups. After 48,000 brushing cycles, the mean gloss and Ra of EsteliteΣ (Gloss 72, Ra 25nm), Filtek Universal Restorative (Gloss 71, Ra 28nm), and Harmonize (Gloss 69, Ra 28nm) were the same, but significantly different from Activa (Gloss 51, Ra 68nm), TPH (Gloss 50, Ra 50nm) and Gradia (Gloss 44, Ra 53nm).The AFM and SEM images confirmed that Filtek Universal Restorative, EsteliteΣQuick and Harmonize were in the group of RBCs that achieved the highest gloss and lowest roughness after toothbrushing.
Conclusions: Filtek Universal Restorative, EsteliteΣ and Harmonize exhibited significantly better self-polishing characteristics than the other three RBCs.
Methods: The effect of toothbrushing on surface gloss and average roughness of Filtek™ Universal Restorative (3M), EsteliteΣQuick® (Tokuyama), Harmonize™ (Kerr™), TPH Spectra® ST HV (Dentsply Sirona), Activa™ Bioactive(Pulpdent), and Gradia® Direct (GC) after toothbrushing. Six precured disks of each RBC were abraded by hand using 600 grit sandpaper to achieve a uniform roughness. The RBCs were then brushed using Crest Regular Fluoride toothpaste, soft-bristled toothbrushes (GUM brand 495PC), and a load of 265 g. The toothbrushes were replaced after 24,000 cycles. Surface gloss was measured at the start and after 1,500, 6,000, 12,000, 24,000 and 48,000 brushing cycles. After 48,000 cycles, the surface of the RBCs was scanned using an atomic force microscope and the mean surface roughness (Ra) of the RBCs was calculated. Representative SEM pictures were also taken of the RBCs after 48,000 brushing cycles at 5,000x magnification. Results were analyzed by one-way ANOVA and Tukey post-hoc tests (a=0.05).
Results: Toothbrushing increased the gloss of all RBCs. Most of the increase occurred within the first 24,000 cycles. The 6 composites fell into two distinct and significantly different groups. After 48,000 brushing cycles, the mean gloss and Ra of EsteliteΣ (Gloss 72, Ra 25nm), Filtek Universal Restorative (Gloss 71, Ra 28nm), and Harmonize (Gloss 69, Ra 28nm) were the same, but significantly different from Activa (Gloss 51, Ra 68nm), TPH (Gloss 50, Ra 50nm) and Gradia (Gloss 44, Ra 53nm).The AFM and SEM images confirmed that Filtek Universal Restorative, EsteliteΣQuick and Harmonize were in the group of RBCs that achieved the highest gloss and lowest roughness after toothbrushing.
Conclusions: Filtek Universal Restorative, EsteliteΣ and Harmonize exhibited significantly better self-polishing characteristics than the other three RBCs.
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