ArticleBioengineering (Basel, Switzerland)2026
Tooth Color Change Following Bleaching with a Desensitizing Double-Layer Technique.
Article in Bioengineering (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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7 authors.
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Abstract
This in vitro study evaluated the effect of incorporating a desensitizing layer between the tooth surface and bleaching gel on tooth color change and treatment time during in-office bleaching procedures. The novelty of this study lies in assessing whether a double-layer technique, previously proposed to modify the diffusion behavior of potassium nitrate and hydrogen peroxide, can maintain whitening efficacy while reducing overall application time. Sixty caries-free third molars were randomly assigned to three groups (n = 20). The CTRL group received 25% hydrogen peroxide (HP) for 30 and 45 min; the DL group received a double-layer application consisting of 5% potassium nitrate followed by 25% HP for the same time intervals; and the MIXED group received 3% potassium nitrate incorporated into 40% HP. Tooth color was measured with a digital spectrophotometer at the baseline and after each treatment interval. Repeated measures ANOVA and pairwise
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