Moreira Rudá França, Santos Fábio Pinheiro, Santos Estevão Antero, Dos Santos Ramon Silva, Dos Anjos Marcelino José, de Miranda Mauro Sayão
School of Dentistry, UERJ, Rio de Janeiro, RJ, Brazil.
Institute of Physics, UERJ, Rio de Janeiro, RJ, Brazil.
Int J Dent. 2017;2017:4646789. doi: 10.1155/2017/4646789. Epub 2017 Aug 28.
The purpose of this study was to evaluate changes in calcium and phosphorus content in dental enamel when subjected to "in-office" whitening for an extended time by using a 35% hydrogen peroxide solution, with and without calcium.
10 human teeth, from which the roots had been removed, were embedded in epoxy resin, and their surfaces were smoothed. The specimens were divided into two groups; in group 1, a whitening solution without calcium was used, while in group 2, the solution included calcium. Each specimen was evaluated at 6 different points before the bleaching treatment, and these points were reassessed after each session. A total of five sessions were carried out. Concentrations of calcium and phosphorus were measured by using the technique of X-ray fluorescence.
After performing a statistical analysis, it was found that there was no statistically significant loss of calcium and phosphorus during the whitening treatment, and the groups showed no statistical differences.
Excessive use of hydrogen peroxide, with or without calcium, causes no loss of calcium and phosphorus.
本研究的目的是评估使用35%过氧化氢溶液在有钙和无钙的情况下进行长时间“诊室”美白时牙釉质中钙和磷含量的变化。
选取10颗已拔除牙根的人牙,嵌入环氧树脂中,并将其表面打磨光滑。将标本分为两组;第1组使用不含钙的美白溶液,而第2组溶液中含有钙。每个标本在漂白处理前的6个不同时间点进行评估,每次处理后重新评估这些时间点。共进行了五次处理。使用X射线荧光技术测量钙和磷的浓度。
经过统计分析,发现在美白处理过程中钙和磷没有统计学上的显著损失,且两组之间没有统计学差异。
无论有无钙,过量使用过氧化氢都不会导致钙和磷的流失。