Resumo

LOGUERCIO, Alessandro Dourado et al. Effectiveness of nano-calcium phosphate paste on sensitivity during and after bleaching: a randomized clinical trial. Braz. oral res. [online]. 2015, vol.29, n.1, pp.1-7.  Epub 21-Ago-2015. ISSN 1807-3107.  https://doi.org/10.1590/1807-3107BOR-2015.vol29.0099.

The study aimed to evaluate the effectiveness of in-office bleaching and associated tooth sensitivity on application of nano-calcium phosphate paste as desensitizing agent. Bleaching was performed with 35% hydrogen peroxide gel in 40 patients who were randomly divided into placebo and nano-calcium phosphate paste groups. Bleaching efficacy (BE) was evaluated using a value-oriented Vita shade guide. Tooth sensitivity was recorded using a numeric rating scale (0–4) during bleaching and up to 48 h after each session. The primary outcome of absolute risk of tooth sensitivity was compared using the Fisher’s exact test (α = 0.05). The intensity of tooth sensitivity and the efficacy of in-office bleaching were also statistically evaluated. No significant differences in absolute risk and intensity of tooth sensitivity were detected between the groups (p = 1.0 and p = 0.53, respectively). BE was also found to be similar between the groups (p = 0.67). Although the use of a nano-calcium phosphate paste associated with fluoride and potassium nitrate did not influence the whitening outcome, but it also did not reduce bleaching-induced tooth sensitivity.

Palavras-chave : Dentin Desensitizing Agents; Calcium Phosphates; Tooth Bleaching Agents; Hydrogen Peroxide; Dentin Sensitivity.

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