Efficacy and tooth sensitivity of at-home bleaching in patients with esthetic restorations: a randomized clinical trial.

This study aims to evaluate the color change and tooth sensitivity (TS) caused by at-home bleaching in patients with sound and with restored teeth. Forty patients were selected according to the inclusion and exclusion criteria and divided into two groups: So (patients with six caries-free maxillary anterior teeth) and Re (patients with at least one restoration in the six maxillary anterior teeth). Both groups were bleached with 10% carbamide peroxide (CP) at-home bleaching. The color change (CIELab [ΔE*ab], CIEDE00 [ΔE00], and whiteness index [∆WID]) were assessed using a spectrophotometer at baseline, 2 weeks, and 1 and 3 months after bleaching. Patients recorded their TS using a numeric rating scale (0-4). Data of color change were submitted to Student's T-test. The absolute risk and intensity of TS were compared using Fisher's and the Mann-Whitney tests, respectively (α = 0.05). Higher ΔE*ab, ΔE00, and ∆WID values were observed for So in relation to Re after all recall rate (p < 0.0001). No significant differences were observed regarding of bleaching-induced TS (p > 0.9). At-home dental bleaching with 10% CP generated the same pattern of TS in patients with or without restorations. However, in patients with restored teeth, it produced a lower color change after 2 weeks of bleaching. After 2 weeks of at-home bleaching, a lower whitening effect was observed in patients with anterior restorations when compared with patients with sound teeth. ClinicalTrials.gov identifier RBR-52j6gmg. © 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Citation

Sônia Saeger Meireles, Renata Dantas Barreto de Oliveira, Marcella Tuanny Guedes Barbosa, Karine Letícia da Silva, Alessandro Dourado Loguercio. Efficacy and tooth sensitivity of at-home bleaching in patients with esthetic restorations: a randomized clinical trial. Clinical oral investigations. 2022 Jan;26(1):565-573

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PMID: 34383143

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