Effectiveness of nano-calcium phosphate paste on sensitivity during and after bleaching: a randomized clinical trial

• Main Authors: Alessandro Dourado LOGUERCIO, Lidia Yileng TAY, Daniel Rodrigo HERRERA, Jose BAUER, Alessandra REIS
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Pesquisa Odontológica 2015-01-01
• Series: Brazilian Oral Research
• Subjects: Dentin Desensitizing Agents; Calcium Phosphates; Tooth Bleaching Agents; Hydrogen Peroxide; Dentin Sensitivity
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242015000100294&lng=en&tlng=en

<p>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.</p>