São Paulo State University, Department of Restorative Dentistry, São José dos Campos, SP, Brazil.
Oper Dent. 2011 Mar-Apr;36(2):162-8. doi: 10.2341/09-280-L.
The aim of this study was to assess the influence of manganese gluconate, a chemical activator of bleaching agents, at a concentration of 0.01% on the efficiency of a 10% carbamide peroxide-based bleaching agent. Forty bovine incisors were immersed in a 25% instant coffee solution for seven days and randomly divided into two groups. Group 1 was the control group and consisted of 10% carbamide peroxide-based bleaching gel only. Group 2 consisted of 10% carbamide peroxide-based bleaching gel and 0.01% manganese gluconate. Three readings of color were taken using the Vita Easyshade spectrophotometer: the initial reading, a reading at seven days, and a reading at 14 days. Total color variation was calculated by ΔE*Lab. Data were submitted to the statistical t-test (5%), which showed that after seven days group 2 had a significant increase in the degree of tooth bleaching compared with group 1. The mean values (±SD) were 16.33 (±3.95) for group 1 and 19.29 (±4.97) for group 2. However, the results for group 1 and group 2 were similar after 14 days. Adding 0.01% manganese gluconate to 10% carbamide peroxide bleaching gel increased the degree of tooth bleaching after a seven-day treatment and did not influence the resulting shade after 14 days.
本研究旨在评估葡萄糖酸锰（一种化学增白剂激活剂）在 0.01%浓度下对 10%过氧化脲基漂白剂效率的影响。将 40 颗牛切牙浸泡在 25%速溶咖啡溶液中七天，然后随机分为两组。第 1 组为对照组，仅使用 10%过氧化脲基漂白凝胶。第 2 组由 10%过氧化脲基漂白凝胶和 0.01%葡萄糖酸锰组成。使用 Vita Easyshade 分光光度计进行了三次颜色读数：初始读数、七天读数和十四天读数。通过 ΔE*Lab 计算总颜色变化。数据提交给统计 t 检验（5%），结果表明，与第 1 组相比，第 2 组在七天后牙齿漂白程度有显著增加。第 1 组的平均值（±SD）为 16.33（±3.95），第 2 组为 19.29（±4.97）。然而，第 1 组和第 2 组在 14 天后的结果相似。在 10%过氧化脲基漂白凝胶中添加 0.01%葡萄糖酸锰可增加七天治疗后的牙齿漂白程度，但对 14 天后的最终色调没有影响。
