Bonato Fernanda, Spohr Ana Maria, Mota Eduardo Gonçalves, Rodrigues-Junior Sinval Adalberto, Burnett Luiz Henrique
Am J Dent. 2016 Feb;29(1):39-45.
(1) To evaluate in vitro the surface roughness of a resin composite covered with three surface sealants and submitted to simulated toothbrushing for different periods; (2) Verify, through scanning electron microscopy (SEM), the presence of surface sealants after simulated toothbrushing; and (3) To evaluate whether the type of dentifrice influences the maintenance of the surface sealant. The study hypothesis was that neither variable would influence the surface roughness of the composite and the maintenance of the surface sealant.
108 specimens were prepared with the resin Amelogen Plus, and divided into six groups (n = 18) according to the type of surface sealant [Fortify (F), BisCover LV (B) and Permaseal (P)] and toothpaste [Total 12 Clean Mint (CT) and Colgate Total 12 Professional Whitening (PW)]. The samples were subjected to brushing cycles, simulating periods of 6, 12, 18, and 24 months. After each period, the surface roughness of the samples was measured. An additional group of 48 samples was prepared for SEM analysis. The results were analyzed by ANOVA with three fixed variables (sealants, time and toothpaste) and by Tukey's test (α = 0.05).
BisCover had the lowest mean surface roughness (0.06 µm) compared with the sealants Fortify (0.09 µm) and Permaseal (0.08 µm), which were not statistically different. Fortify, at 12 months of brushing, had the highest mean roughness (0.13 µm). The mean roughness for the dentifrice CT was lower (0.07 µm) when compared with PW (0.08 µm) and was statistically different. Roughness increased up to 12 months of simulated brushing (0.04 µm, 0.08 µm and 0.11 µm), decreasing from the 18th month (0.08 µm) to the 24th month of brushing (0.07 µm). None of the sealants was observed (with SEM) to be completely removed from the resin at 24 months of brushing.
（1）在体外评估三种表面封闭剂覆盖并经过不同时长模拟刷牙的树脂复合材料的表面粗糙度；（2）通过扫描电子显微镜（SEM）验证模拟刷牙后表面封闭剂的存在情况；（3）评估牙膏类型是否会影响表面封闭剂的维持情况。研究假设为这些变量均不会影响复合材料的表面粗糙度及表面封闭剂的维持情况。
用树脂Amelogen Plus制备108个样本，并根据表面封闭剂类型[Fortify（F）、BisCover LV（B）和Permaseal（P）]以及牙膏类型[高露洁全效清新薄荷味牙膏（CT）和高露洁全效专业美白牙膏（PW）]分为六组（n = 18）。样本接受刷牙循环，模拟6、12、18和24个月的时长。每个时长后，测量样本的表面粗糙度。另外制备48个样本用于SEM分析。结果通过具有三个固定变量（封闭剂、时间和牙膏）的方差分析以及Tukey检验（α = 0.05）进行分析。
与Fortify（0.09 µm）和Permaseal（0.08 µm）封闭剂相比，BisCover的平均表面粗糙度最低（0.06 µm），后两者无统计学差异。在刷牙12个月时，Fortify的平均粗糙度最高（0.13 µm）。与PW（0.08 µm）相比，CT牙膏的平均粗糙度更低（0.07 µm），且具有统计学差异。粗糙度在模拟刷牙12个月时增加（0.04 µm、0.08 µm和0.11 µm），从第18个月（0.08 µm）到第24个月刷牙时降低（0.07 µm）。在刷牙24个月时，（通过SEM观察）未发现任何封闭剂从树脂上完全去除。
