Cordeiro Deisy Cristina Ferreira, Centenaro Gabrielle Gomes, Favoreto Michael Willian, de Matos Rodrigues Maria Alice, Reis Alessandra, Loguercio Alessandro Dourado
Department of Restorative Dentistry, State University of Ponta Grossa, Paraná, Brazil.
Department of Restorative Dentistry, School of Dentistry, Tuiuti University of Paraná, Paraná, Brazil.
J Esthet Restor Dent. 2025 Jun 25. doi: 10.1111/jerd.13501.
To evaluate whiteness difference (WI) and hydrogen peroxide (HP) penetration into the pulp chamber in extracted teeth subjected to various in-office application protocols.
A total of 154 human premolars were randomly assigned to 11 groups (n = 14). The groups were divided into: Pola Office+ and Pola Rapid (SDI), and the following protocols: three applications of 8 min (3 × 8), two applications of 8 min (2 × 8), one application of 8 min (1 × 8), one application of 16 min (1 × 16), and one application of 24 min (1 × 24). These protocols were selected based on manufacturer recommendations and the aim of exploring simplified and alternative approaches applicable to clinical practice. One group served as a negative control. WI was assessed using a digital spectrophotometer before and after two sessions. HP concentration in the pulp chamber was measured using UV-Vis spectrophotometry. ANOVA two-way and Tukey's and Dunnett's tests were used for data analysis.
Significant WI were observed after two sessions, with greater changes in the 2 × 8, 3 × 8, and 1 × 24 protocols (p < 0.001). Lower levels of peroxide penetration were found with shorter application, such as the 1 × 8 protocol, while higher levels were detected in the 3 × 8 protocol (p < 0.0001).
Among the evaluated protocols, the 2 × 8-min and 1 × 24-min applications provided the best balance between achieving significant whitening and minimizing hydrogen peroxide penetration into the pulp chamber, making them effective and safer alternatives for in-office bleaching.
Shorter application times (2 × 8 min) or a single prolonged application (1 × 24 min) provide effective alternatives for achieving excellent whitening index results. These protocols reduce hydrogen peroxide penetration into the pulp chamber while also shortening the overall procedure time, enhancing both safety and efficiency.
评估在接受不同诊室应用方案的拔除牙齿中，牙齿美白差异（WI）以及过氧化氢（HP）渗入髓腔的情况。
总共154颗人类前磨牙被随机分为11组（每组n = 14）。这些组分为：Pola Office+和Pola Rapid（SDI），以及以下方案：8分钟应用三次（3×8）、8分钟应用两次（2×8）、8分钟应用一次（1×8）、16分钟应用一次（1×16）和24分钟应用一次（1×24）。这些方案是根据制造商的建议以及探索适用于临床实践的简化和替代方法的目的而选择的。一组作为阴性对照。在两个疗程前后使用数字分光光度计评估WI。使用紫外可见分光光度法测量髓腔中的HP浓度。采用双向方差分析以及Tukey检验和Dunnett检验进行数据分析。
两个疗程后观察到显著的WI，在2×8、3×8和1×24方案中变化更大（p < 0.001）。应用时间较短的方案（如1×8方案）中过氧化物渗入水平较低，而在3×8方案中检测到较高水平（p < 0.0001）。
在所评估的方案中，2×8分钟和1×24分钟的应用在实现显著美白和使过氧化氢渗入髓腔最小化之间提供了最佳平衡，使其成为诊室漂白有效且更安全的替代方法。
较短的应用时间（2×8分钟）或单次延长应用（1×24分钟）为获得优异的美白指数结果提供了有效的替代方法。这些方案减少了过氧化氢渗入髓腔，同时也缩短了整个操作时间，提高了安全性和效率。
