Scaramucci Tais, Hara Anderson T, Zero Domenick T, Ferreira Stella S, Aoki Idalina V, Sobral Maria Angela P
Department of Restorative Dentistry, Dental School, University of São Paulo, São Paulo, Brazil.
Braz Dent J. 2011;22(6):473-8. doi: 10.1590/s0103-64402011000600006.
The aim of this study was to create a synthetic juice (SJ) to be used as a surrogate for natural orange juices in erosion studies, verifying its erosive potential. The SJ was formulated based on the chemical composition of orange juices from different locations. Forty enamel and 40 root dentin specimens were randomly assigned into 4 experimental groups (n = 10): SJ; 1% Citric Acid (CA); Minute Maid Original® (MM) and Florida Natural Original® (FN). The specimens were immersed in their respective solutions for 5 min, 6x/day for 5 days, in an erosion-remineralization cycling model. Enamel specimens were analyzed by surface Knoop microhardness and optical profilometry and dentin specimens only by optical profilometry. Outcomes were analyzed statistically by ANOVA followed by Tukey's test considering a significance level of 5%. For enamel, the surface loss and microhardness changes found for MM and SJ groups were similar (p>0.05) and significantly lower (p<0.01) than those found in the CA group. For dentin, CA promoted significantly greater (p<0.01) surface loss compared with all the other groups. No significant difference (p>0.05) was observed in dentin surface loss between MM and SJ. In conclusion, CA was the most erosive solution, and SJ had a similar erosive potential to that of MM natural orange juice.
本研究的目的是制备一种合成果汁（SJ），用作侵蚀研究中天然橙汁的替代品，并验证其侵蚀潜力。SJ是根据不同产地橙汁的化学成分配制而成。将40个牙釉质标本和40个牙根牙本质标本随机分为4个实验组（n = 10）：SJ；1%柠檬酸（CA）；美汁源原味（MM）和佛罗里达天然原味（FN）。在侵蚀-再矿化循环模型中，将标本分别浸泡在各自的溶液中5分钟，每天6次，共5天。牙釉质标本通过表面努氏显微硬度和光学轮廓仪进行分析，牙本质标本仅通过光学轮廓仪进行分析。采用方差分析（ANOVA），然后进行Tukey检验对结果进行统计学分析，显著性水平为5%。对于牙釉质，MM组和SJ组的表面损失和显微硬度变化相似（p>0.05），且显著低于CA组（p<0.01）。对于牙本质，与所有其他组相比，CA导致的表面损失显著更大（p<0.01）。MM组和SJ组之间的牙本质表面损失未观察到显著差异（p>0.05）。总之，CA是侵蚀性最强的溶液，SJ的侵蚀潜力与MM天然橙汁相似。
