Anagnostaki Eugenia, Mylona Valina, Kosma Kyriaki, Parker Steven, Chala Marianna, Cronshaw Mark, Dimitriou Vasilis, Tatarakis Michael, Papadogiannis Nektarios, Lynch Edward, Grootveld Martin
Leicester School of Pharmacy, De Montfort University, Gateway House, Leicester LE1 9BH, UK.
Institute of Plasma Physics and Lasers, Hellenic Mediterranean University, Tria Monastiria, 74100 Rethymno, Greece.
Dent J (Basel). 2020 Dec 16;8(4):137. doi: 10.3390/dj8040137.
During in-office bleaching, appropriate light sources are applied in order to enhance the activity of the bleaching gels applied onto teeth. For this method to be effective, a high absorption of light within the gel is necessary. Variation in the light attenuation capability of the gel, the duration of application and light activation can contribute towards safety hazards associated with this procedure.
In this study, seven different gels and hydrogen peroxide have been evaluated for their optical properties by means of spectrophotometry (440-1000 nm). The transmitted light spectrum was used to estimate the intensity loss for each gel. The mean intensity decreases observed were statistically analysed using an analysis of variance (ANOVA).
The five more-pigmented gels tested indicated a very similar intensity loss of around 80%, whereas the remaining two gels showed significantly less attenuation (predominantly, < 10).
Throughout the spectrum of wavelengths examined, and according to the underlying studies evaluated, five of the gels assessed demonstrated an attenuation high enough to possibly avoid overheating of the underlying enamel dentine and pulp. An evaluation of appropriate irradiation parameters is proposed.
在诊室漂白过程中，会使用适当的光源来增强涂覆在牙齿上的漂白凝胶的活性。为使该方法有效，凝胶内的光吸收必须较高。凝胶光衰减能力、照射持续时间和光激活的变化可能会导致与该过程相关的安全隐患。
在本研究中，通过分光光度法（440 - 1000 nm）评估了七种不同的凝胶和过氧化氢的光学性质。透过光谱用于估计每种凝胶的强度损失。使用方差分析（ANOVA）对观察到的平均强度降低进行统计分析。
测试的五种色素沉着较多的凝胶显示出非常相似的强度损失，约为80%，而其余两种凝胶的衰减明显较小（主要<10）。
在所研究的整个波长范围内，根据所评估的基础研究，所评估的五种凝胶表现出足够高的衰减，可能避免底层牙釉质牙本质和牙髓过热。建议对适当的照射参数进行评估。
