School of Dentistry, Federal University of Amazonas, Manaus, AM, Brazil.
School of Dentistry, Paulo Picanço School of Dentistry, Fortaleza, Ceará, Brazil.
J Esthet Restor Dent. 2022 Mar;34(2):360-368. doi: 10.1111/jerd.12863. Epub 2021 Dec 31.
This study was aimed at comparing the bleaching efficacy and bleaching sensitivity (BS) of two higher-concentration in-office bleaching gels (37% carbamide peroxide [CP] and 38% hydrogen peroxide [HP]) applied under two conditions: alone or in association with sonic activation.
Fifty-six volunteers were randomly assigned in the split-mouth design into the following groups: CP, CP with sonic activation (CPS), HP, and HP with sonic activation (HPS). Two in-office bleaching sessions were performed. Color was evaluated using Vita Classical, Vita Bleachedguide, and digital spectrophotometer at baseline and at 30 days post-bleaching. Absolute risk and intensity of BS were recorded using two pain scales. All data were evaluated statistically (color changes [t test], BS [Chi-square and McNemar test], and BS intensity [VAS; t test; NRS; Wilcoxon; α = 0.05]).
Significant and higher whitening was observed for HP when compared with CP (p < 0.04). However, higher BS intensity was observed in the former (p < 0.001). No significant difference was observed in whitening effect or BS when the HP or CP bleaching gels were agitated (sonic application) compared with when they were not (p > 0.05).
The 37% CP gel demonstrated lower bleaching efficacy and lower BS compared with the 38% HP bleaching gel. The whitening effect was not influenced by the use of sonic activation.
The use of 37% CP gel did not achieve the same whitening effect when compared to 38% HP gel used for in-office bleaching. The use of sonic activation offers no benefit for in-office bleaching.
本研究旨在比较两种高浓度的诊室用漂白凝胶（37%过氧化脲[CP]和 38%过氧化氢[HP]）在两种条件下的漂白效果和漂白敏感性（BS）：单独使用或联合声激活使用。
56 名志愿者采用分口设计随机分为以下组：CP 组、CP 联合声激活（CPS）组、HP 组和 HP 联合声激活（HPS）组。进行了两次诊室漂白。在基线和漂白后 30 天，使用 Vita Classical、Vita Bleachedguide 和数字分光光度计评估颜色。使用两个疼痛量表记录绝对 BS 风险和强度。使用 t 检验、卡方和 McNemar 检验、VAS、NRS 和 Wilcoxon 检验统计评估所有数据（颜色变化[检验]、BS[检验和 McNemar 检验]和 BS 强度[VAS；t 检验；NRS；Wilcoxon；α=0.05]）。
与 CP 相比，HP 观察到更显著和更高的增白效果（p<0.04）。然而，前者观察到更高的 BS 强度（p<0.001）。与不搅拌（声激活）相比，当 HP 或 CP 漂白凝胶搅拌（声应用）时，漂白效果或 BS 没有显著差异（p>0.05）。
与 38% HP 漂白凝胶相比，37% CP 凝胶显示出较低的漂白效果和较低的 BS。声激活的使用并未影响增白效果。
与 38% HP 凝胶用于诊室漂白相比，使用 37% CP 凝胶并未达到相同的美白效果。声激活的使用对诊室漂白没有益处。
