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首页> 外文期刊>The Journal of the American Dental Association >A randomized clinical trial comparing at-home and in-office tooth whitening techniques: A nine-month follow-up.
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A randomized clinical trial comparing at-home and in-office tooth whitening techniques: A nine-month follow-up.

机译：一项对居家和办公室内牙齿美白技术进行比较的随机临床试验：九个月的随访。

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BACKGROUND: The aim of this split-mouth, randomized controlled trial was to compare the whitening results of at-home and in-office tooth bleaching techniques and the longevity of their effects at nine months after teeth had been bleached. METHODS: The authors conducted a study involving a 14-day bleaching period, during which the first maxillary premolars of 17 participants, who were 20 to 25 years of age, were bleached by means of either an at-home technique involving 10 percent carbamide peroxide or an in-office technique involving 38 percent hydrogen peroxide. The authors recorded color variables as proposed by the Commission Internationale de l'Eclairage-lightness (L*), redness (a*) and yellowness (b*)-by using a spectrophotometer at baseline and at one week, one month and nine months after bleaching. They also calculated a whiteness (W) index that was based on the distance of the color value in the color space from a nominal white point. RESULTS: At the nine-month recall visit, comparison between the at-home and the in-office techniques did not show significantly different values for L* (P = .448), a* (P = .350), b* (P = .144) and W (P = .151) color variables. None of the participants experienced any adverse events related to the bleaching during the treatment period. CONCLUSIONS: The study results showed no clinically significant difference in bleaching efficacy. Both techniques produced satisfactory and long-lasting bleaching results. CLINICAL IMPLICATIONS: In young adults, either the at-home or the in-office technique can be used effectively.
机译：背景：这项双口随机对照试验的目的是比较家用和办公室内牙齿漂白技术的美白效果及其在牙齿漂白后九个月的效果。方法：作者进行了一项为期14天的漂白期研究，在此期间，通过一项涉及10％过氧化尿素的家庭技术对17位参与者的上颌前磨牙进行了漂白，这些参与者年龄在20至25岁之间。或涉及38％过氧化氢的办公室技术。作者记录了国际亮度委员会（L *），红色（a *）和黄色（b *）提出的颜色变量，方法是在基线时以及在一周，一个月，一个月和九个月时使用分光光度计漂白后。他们还计算了白度（W）指数，该指数基于色彩空间中色彩值与标称白点的距离。结果：在为期9个月的召回访问中，在家和办公室技术之间的比较未显示L *（P = .448），a *（P = .350），b *（ P = .144）和W（P = .151）颜色变量。在治疗期间，没有参与者经历与漂白有关的任何不良事件。结论：研究结果显示在漂白功效上没有临床上的显着差异。两种技术均产生令人满意且持久的漂白效果。临床意义：在年轻人中，可以有效地使用在家或办公室内的技术。

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