Machado Lucas Silveira, de Oliveira Fernanda Garcia, Rocha Eduardo Passos, dos Santos Paulo Henrique, Briso André Luiz Fraga, Sundefeld Maria Lúcia Marçal Mazza, Sundfeld Renato Herman
Department of Restorative Dentistry, Araçatuba School of Dentistry, São Paulo State University, São Paulo, Brazil.
Int J Periodontics Restorative Dent. 2013 Mar-Apr;33(2):209-15. doi: 10.11607/prd.1410.
The aim of this study was to assess the color alteration and sensitivity of teeth throughout and following in-office bleaching. Twenty-two volunteers participated in this clinical trial of bleaching treatment (35% hydrogen peroxide bleaching gel and placebo) applied on maxillary incisors and canines. According to a split-mouth design, the volunteers' maxillary hemi-arches received either the bleaching or placebo agent, applied four times, at 1-week intervals. Color alteration and tooth sensitivity were assessed throughout and following bleaching. Statistical calculations were performed using gamma distribution and repeated-measures ANOVA. There was a statistically significant difference between teeth submitted to a bleaching agent and placebo (P < .001). At the end of the first, second, third, and fourth sessions, the bleached teeth presented color scores statistically lower than those observed immediately before bleaching. There was no difference in the color scale scores of the bleached teeth between bleaching sessions. The sensitivity data test showed a significant difference among treatments (P < .0001). Color alteration and dental sensitivity were altered by the bleaching agent.
本研究的目的是评估诊室漂白期间及之后牙齿的颜色变化和敏感性。22名志愿者参与了这项在上颌中切牙和尖牙上应用漂白治疗（35%过氧化氢漂白凝胶和安慰剂）的临床试验。根据双盲设计，志愿者的上颌半牙弓接受漂白剂或安慰剂，每隔1周涂抹4次。在漂白期间及之后评估颜色变化和牙齿敏感性。使用伽马分布和重复测量方差分析进行统计计算。接受漂白剂和安慰剂的牙齿之间存在统计学上的显著差异（P <.001）。在第一、第二、第三和第四次治疗结束时，漂白牙齿的颜色评分在统计学上低于漂白前立即观察到的评分。漂白疗程之间，漂白牙齿的色阶评分没有差异。敏感性数据测试显示治疗之间存在显著差异（P <.0001）。漂白剂会改变牙齿的颜色变化和敏感性。
