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首页> 外文期刊>Journal of dentistry >In-office bleaching gel with 35% hydrogen peroxide enhanced biofilm formation of early colonizing streptococci on human enamel
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In-office bleaching gel with 35% hydrogen peroxide enhanced biofilm formation of early colonizing streptococci on human enamel

机译：在办公室漂白凝胶，具有35％过氧化氢的增强型生物膜形成的早期殖民链球菌在人牙釉质上形成

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Objectives To compare the effects of 25% and 35% hydrogen peroxide in-office bleaching systems on surface roughness and streptococcal biofilm formation on human enamel.Methods Enamel specimens (3 mm × 3 mm × 2 mm, n = 162) from human permanent teeth were randomly divided into 3 treatment groups (n = 54 each): (1) control, (2) bleached with 25% hydrogen peroxide (Zoom2?), and (3) bleached with 35% hydrogen peroxide (Beyond?). The enamel surface roughness was measured by a profilometer before and after treatments. Subsequently, the treated enamel specimens were randomly placed into 3 subgroups (n = 18 each) and incubated with: (1) trypticase soy broth control, (2) Streptococcus mutans culture and (3) Streptococcus sanguinis culture for 24 h. Biofilm formation was quantified by crystal violet staining. The biofilm structure on three specimens from each group was visualized by scanning electron microscopy. Data were analyzed by Kruskal-Wallis and Mann-Whitney U tests with Bonferroni corrections. Significance level was set at p < 0.05.Results Both bleaching systems significantly reduced enamel surface roughness comparing to the control group (p < 0.001), but there was no difference between the two treatment groups. Remarkably, S. sanguinis biofilm formation was significantly higher on enamel specimens bleached with 35% hydrogen peroxide than other treatments (p < 0.001), but was lower on those bleached with 25% hydrogen peroxide (p < 0.001). In contrast, no difference in S. mutans biofilm formation was observed among the three treatment groups. Conclusion Both 25% and 35% hydrogen peroxide caused similar degrees of reduction in enamel surface roughness. Nevertheless, bleaching with 35% hydrogen peroxide appeared to markedly promote S. sanguinis biofilm formation.Clinical significance The increase of early colonizer biofilm raised concerns over adverse effects of in-office bleaching on plaque formation. This should be further investigated in vivo and efficient plaque control should be emphasized after bleaching with high concentrations of hydrogen peroxide.
机译：目标，将25％和35％过氧化氢在人牙釉质上的表面粗糙度和链球菌生物膜形成的效果比较。从人牙牙牙齿中，搪瓷标本（3mm×3mm×2mm，n = 162）被随机分为3组（每个N = 54个）：（1）对照，（2）用25％过氧化氢（Zoom2？）漂白，并用35％过氧化氢（超出α）漂白。牙釉质表面粗糙度通过处理前后的型材仪测量。随后，将处理过的牙釉质标本随机置于3个亚组（每个）中并与：（1）胰蛋白酶大豆肉汤控制，（2）链球菌发生培养物和（3）Streptococcus stanguinis培养24小时。通过晶体紫染色量化生物膜形成。通过扫描电子显微镜可视化来自每组的三个标本的生物膜结构。通过Kruskal-Wallis和Mann-Whitney U测试进行分析数据。在P <0.05中设定了显着性水平。结果漂白系统显着降低了与对照组（P <0.001）比较的搪瓷表面粗糙度，但两种治疗组之间没有差异。值得注意的是，S.Sanguinis生物膜形成在搪瓷样品上漂白的35％氢过氧化氢比其他处理（P <0.001）漂白，但在用25％过氧化氢漂白的那些（P <0.001）上较低。相比之下，三种治疗组中观察到S. mutans生物膜形成的差异。结论25％和35％过氧化氢引起了搪瓷表面粗糙度的相似程度。然而，用35％的过氧化氢漂白似乎明显促进了S.Anganguinis Biofilm的形成。临床意义早期殖民机生物膜的增加提高了在办公室漂白对斑块形成的不良反应的担忧。应该在体内进行进一步研究，并在用高浓度的过氧化氢漂白后强调应强调有效的噬菌斑对照。

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