Kabil Shadwa H, Haridy Mohamed F, Farid Mohamed R
Restorative Department, Faculty of Dentistry, The British University in Egypt, El Sherouk City, Cairo, Egypt.
Conservative Dentistry Department, Faculty of Dentistry, Cairo University, Cairo, Egypt.
Open Access Maced J Med Sci. 2019 Jul 14;7(13):2173-2181. doi: 10.3889/oamjms.2019.588. eCollection 2019 Jul 15.
The study aimed to compare teeth sensitivity and shade after bleaching protocol with descending different light intensities versus bleaching protocol with the same high light intensity.
Sample size was twenty-four patients. Each group consisted of twelve patients. Group, I patients received bleaching protocol of descending different light intensities. Group II patients received bleaching protocol with the same high light intensity; both groups used the same home bleaching gel kit for seven days according to manufacturer instructions and protocol. Baseline records were digital photographs, teeth sensitivity and teeth shade for 12 anterior teeth. Teeth sensitivity was assessed using five points verbal rating scale and Standardized 100 mm Visual analogue scale after 1 day, after 2 days and after 1 week. Teeth shades for twelve anterior teeth were recorded by VITA Easy Shade V (VITA Zahnfabrik H. Rauter GmbH & Co. KG, Germany) after 1 week by VITA Easy Shade V. Mann-Whitney test (non-parametric test, 2 independent samples) was used to compare teeth sensitivity between both bleaching protocols at each period. A paired t-test (parametric test, 2 related samples) was performed to compare the colour change in shade guide units (SGU) and ∆E values within high light intensity bleaching protocol. While Wilcoxon Signed-Rank test (non-parametric test, 2 related samples) was used to compare colour change light intensities bleaching protocol. Comparison of bleaching effectiveness (∆SGU and ∆Ediff) between both bleaching protocols was performed by the Mann-Whitney test.
Descending light intensities protocol showed a lower teeth sensitivity than high light intensity protocol after 1 and 2 days. There was no teeth sensitivity reported at 1-week post-bleaching. Regarding the teeth shade, descending light intensities protocol had a little higher effect on colour change in shade guide units (SGU) than high light intensity protocol effect. Both bleaching protocols showed there was no significant difference in ∆SGU recorded after bleaching between high and descending light intensities protocols.
Descending different light intensities protocol showed a lower teeth sensitivity than high same light intensity protocol. Descending light intensities protocol had a little higher effect on colour change in shade guide units (SGU) than high light intensity protocol effect.
本研究旨在比较不同光强递减的漂白方案与相同高光强漂白方案后的牙齿敏感性和色泽。
样本量为24例患者。每组由12例患者组成。第一组患者接受不同光强递减的漂白方案。第二组患者接受相同高光强的漂白方案；两组均按照制造商的说明和方案使用相同的家庭漂白凝胶套件7天。基线记录包括12颗前牙的数码照片、牙齿敏感性和牙齿色泽。在1天、2天和1周后，使用五点言语评定量表和标准化的100毫米视觉模拟量表评估牙齿敏感性。1周后，使用VITA Easy Shade V（德国VITA Zahnfabrik H. Rauter GmbH & Co. KG）记录12颗前牙的牙齿色泽。使用曼-惠特尼检验（非参数检验，2个独立样本）比较每个时期两种漂白方案之间的牙齿敏感性。进行配对t检验（参数检验，2个相关样本）以比较高光强漂白方案中比色板单位（SGU）的颜色变化和∆E值。而威尔科克森符号秩检验（非参数检验，2个相关样本）用于比较不同光强漂白方案的颜色变化。通过曼-惠特尼检验比较两种漂白方案之间的漂白效果（∆SGU和∆Ediff）。
在1天和2天后，光强递减方案显示出比高光强方案更低的牙齿敏感性。漂白后1周未报告牙齿敏感情况。关于牙齿色泽，光强递减方案对比色板单位（SGU）颜色变化的影响略高于高光强方案的影响。两种漂白方案均显示，高光强和光强递减方案漂白后记录的∆SGU无显著差异。
不同光强递减方案显示出比相同高光强方案更低的牙齿敏感性。光强递减方案对比色板单位（SGU）颜色变化的影响略高于高光强方案的影响。
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