Moura J S, Lima E M C X, Paes Leme A F, Del Bel Cury Altair A, Tabchoury C P M, Cury J A
Faculty of Dentistry of Piracicaba, University of Campinas, Piracicaba, SP, Brazil.
Oper Dent. 2004 Sep-Oct;29(5):509-14.
Since the importance of luting cement on secondary caries in enamel and dentin is unknown, an in situ crossover study was conducted in three phases over 21 days using a fluoride-containing toothpaste. One hundred and twenty-six metallic restorations were cemented into the dentinoenamel junction of slabs of human teeth with zinc phosphate (ZP), resin-modified glass ionomer (GI) or resinous cement (RC). The slabs were inserted onto flanges of the removable partial acrylic dentures of 14 volunteers and covered with gauze to enhance dental plaque accumulation. The volunteers used fluoride toothpaste (1.100 microg F/g, w/w). After 21 days, the biofilm that formed on the slabs was collected for biochemical and microbiological analyses, and the demineralization in enamel-dentin around the restorations was evaluated. The fluoride concentration of biofilm in the GI group was higher (p<0.05) than the ZP and RC groups. Also, the concentration of Zinc in biofilm formed on the slabs cemented with ZP was higher (p<0.05) than the other groups. However, the effect of the luting material on enamel or dentin demineralization was not statistically significant (p>0.05). The data suggest that when fluoride toothpaste is used, the anticariogenic property of the luting cement may not be relevant to the reduction of secondary caries.
由于粘结水门汀对牙釉质和牙本质继发龋的影响尚不清楚，因此进行了一项为期21天、分三个阶段的原位交叉研究，使用含氟牙膏。将126个金属修复体用磷酸锌（ZP）、树脂改性玻璃离子水门汀（GI）或树脂水门汀（RC）粘结到人牙切片的牙本质牙釉质界处。将切片安装到14名志愿者的可摘局部丙烯酸义齿的翼缘上，并用纱布覆盖以促进牙菌斑堆积。志愿者使用含氟牙膏（1.100μg F/g，w/w）。21天后，收集切片上形成的生物膜进行生化和微生物分析，并评估修复体周围牙釉质-牙本质中的脱矿情况。GI组生物膜中的氟浓度高于ZP组和RC组（p<0.05）。此外，用ZP粘结的切片上形成的生物膜中的锌浓度高于其他组（p<0.05）。然而，粘结材料对牙釉质或牙本质脱矿的影响无统计学意义（p>0.05）。数据表明，当使用含氟牙膏时，粘结水门汀的防龋性能可能与继发龋的减少无关。
