Influence of fluoride-releasing restorative material on root dentine secondary caries in situ
Influence of fluoride-releasing restorative material on root dentine secondary caries in situ
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DOI：
10.1159/000094290
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发表时间：
2006-01-01
期刊：
影响因子：
4.2
通讯作者：
Cury, J. A.
中科院分区：
文献类型：
--
作者：
Hara, A. T.;Turssi, C. P.;Cury, J. A.
由于存在其他常见的氟化物来源以及由于修复体的老化，释放氟化物的修复体在二级龋齿预防中的作用可能受到质疑。本研究验证了一个假设，即当经常使用含氟牙膏时，玻璃离子聚合物水泥修复体，无论是老化的还是未老化的，都不能预防继发牙根龋。根据2 × 2交叉设计，16名志愿者在14天的两个阶段佩戴腭部矫治器。在每个阶段，矫治器装载用玻璃离子或树脂复合材料修复的牛根牙本质板，无论是老化的还是未老化的。每天4次致龋刺激和3次氟化牙膏刺激。分析了平板上形成的生物膜（FB）中的氟化物含量和修复体周围的矿物质损失（Delta Z）。无论是老龄组（p = 0.792和p = 0.645）还是未老龄组（p = 1.00和p = 0.278），修复材料之间在FB和Delta Z方面均无差异。在本研究的致龋和含氟牙膏暴露条件下，玻璃离聚体修复体，无论是老化的还是未老化的，都没有提供额外的预防继发牙根龋的保护。版权所有(c) 2006 S. Karger AG，巴塞尔。
The usefulness of fluoride-releasing restorations in secondary caries prevention may be questioned because of the presence of other common sources of fluoride and because of ageing of the restorations. This study tested the hypothesis that glass-ionomer cement restorations, either aged or unaged, do not prevent secondary root caries, when fluoride dentifrice is frequently used. Sixteen volunteers wore palatal appliances in two phases of 14 days, according to a 2 x 2 crossover design. In each phase the appliance was loaded with bovine root dentine slabs restored with either glass-ionomer or resin composite, either aged or unaged. Specimens were exposed to cariogenic challenge 4 times/day and to fluoridated dentifrice 3 times/day. The fluoride content in the biofilm (FB) formed on slabs and the mineral loss (Delta Z) around the restorations were analysed. No differences were found between restorative materials regarding the FB and the Delta Z, for either aged (p = 0.792 and p = 0.645, respectively) or unaged (p = 1.00 and p = 0.278, respectively) groups. Under the cariogenic and fluoride dentifrice exposure conditions of this study, the glass-ionomer restoration, either aged or unaged, did not provide additional protection against secondary root caries. Copyright (c) 2006 S. Karger AG, Basel.