Department of Restorative Dentistry, Division of Operative Dentistry, Oregon Health & Science University School of Dentistry, Portland, OR 97239, USA.
J Dent. 2010;38 Suppl 2:e123-8. doi: 10.1016/j.jdent.2010.02.005. Epub 2010 Mar 1.
The purpose of this study was to evaluate the effect of different levels of abrasiveness (RDA) of dentifrices on the gloss and surface roughness of resin composites after toothbrushing.
Sixty disk-shaped composite specimens (D=10.0mm, 2-mm thick, n=15 per material) were made of: microfill (Durafill), nanofill (Filtek Supreme), minifill hybrid (Filtek 250), and nanohybrid (Premise). One side of each specimen was finished with a carbide bur and polished with Enhance and Pogo. Five specimens of each composite were randomly assigned to one of the dentifrices, Colgate Total (CT; RDA 70), Colgate baking soda & peroxide whitening (CBS; RDA 145), and Colgate tartar control & whitening (CTW; RDA 200). Surface gloss was measured with a glossmeter and surface roughness with a profilometer before and after toothbrushing with a 1:2 slurry (dentifrice/deionised water) at 5760 strokes in a brushing machine (approximately 1Hz). Results were analyzed by three-way ANOVA/Tukey's (p<0.05).
There was a significant reduction in gloss and increase in surface roughness after brushing with all dentifrices. There was no significant difference in gloss when Durafill was brushed with any dentifrice; the other composites showed less gloss reduction when brushed with CT. Durafill, Supreme and Premise did not show significantly different surface roughness results and CBS and CTW did not produce significantly different results.
Dentifrices of lower abrasivity promote less reduction in gloss and surface roughness for composites of different particle sizes after brushing. Composites containing smaller average fillers showed less reduction in gloss and less increase in surface roughness than ones with larger fillers.
本研究旨在评估不同磨损值（RDA）的牙膏对刷牙后树脂复合材料光泽度和表面粗糙度的影响。
制作 60 个圆盘状复合试件（D=10.0mm，2mm 厚，n=15/材料），分别为：微填料（Durafill）、纳米填料（Filtek Supreme）、小颗粒混合填料（Filtek 250）和纳米混合填料（Premise）。每个试件的一侧用碳化硅车针打磨，并用 Enhance 和 Pogo 抛光。将每种复合材料的 5 个试件随机分配到以下牙膏中的一种：高露洁全效（CT；RDA70）、高露洁小苏打和过氧化美白牙膏（CBS；RDA145）和高露洁牙垢控制和美白牙膏（CTW；RDA200）。在刷牙机上用 1:2 浆（牙膏/去离子水）以 5760 次/分的速度刷牙前后，用光泽计测量表面光泽度，用轮廓仪测量表面粗糙度（大约 1Hz）。结果采用三因素方差分析/Tukey 检验（p<0.05）。
所有牙膏刷牙后，光泽度明显降低，表面粗糙度增加。用任何牙膏刷牙时，Durafill 的光泽度均无显著差异；用 CT 刷牙时，其他复合材料的光泽度降低较少。Durafill、Supreme 和 Premise 的表面粗糙度结果无显著差异，CBS 和 CTW 的结果也无显著差异。
磨损值较低的牙膏可减少不同粒径的复合材料在刷牙后的光泽度和表面粗糙度降低。平均粒径较小的复合材料的光泽度降低和表面粗糙度增加均小于粒径较大的复合材料。
