目的:比较颜色变化,牙齿敏感(TS)的风险和强度,和仅应用于口腔表面或口腔和舌表面的在家漂白的牙龈刺激(GI)。
方法:选择了60例犬科动物A2或较深的患者,并将其上弓随机分为两组:仅在颊表面或在颊和舌面进行家庭漂白,含有7.5%的过氧化氢,每天1小时/2周。在基线处评估颜色变化,7、14天,和漂白后1个月,使用遮阳仪(ΔSGU)和分光光度计(ΔEAB,ΔE00和ΔWID)。每天使用视觉模拟量表(0-10)记录TS和GI的风险和强度。通过口面美学评估患者的满意度。配对t检验,McNemar\'s,数据分析采用Wilcoxon符号秩检验(α=5%)。
结果:两组之间的颜色变化和TS的风险/强度均无统计学差异(p>0.05)。两组患者漂白后满意度均有所提高(p<0.05)。
结论:与仅施加在颊表面上的漂白相比,添加一个接触表面不会导致增白程度增加。
结论:了解表面与漂白剂相互作用的影响对于理解漂白机理和避免不必要的材料费用至关重要。值得注意的是,采用仅颊技术足以实现所需的功效。
OBJECTIVE: To compare the color change, the risk and intensity of tooth sensitivity (TS), and gingival irritation (GI) of at-home bleaching applied on the buccal surface only or the buccal and lingual surfaces.
METHODS: Sixty patients with canines A2 or darker were selected and their superior arches were randomized in two groups: at-home bleaching on the buccal-only or on the buccal and lingual surfaces, with 7.5% hydrogen peroxide, for 1 h daily/2 weeks. The color change was evaluated at baseline, 7, 14 days, and 1 month after bleaching using shade guides scales (ΔSGU) and a spectrophotometer (ΔEAB, ΔE00, and ΔWID). Risk and intensity of TS and GI were recorded daily using visual analogic scale (0-10). Patient satisfaction was evaluated with the orofacial esthetics. Paired t-test, McNemar\'s, and Wilcoxon signed-rank test were used for data analysis (α = 5%).
RESULTS: Neither the color change nor the risk/intensity of TS was statistically different between groups (p > 0.05). Patient satisfaction increased after bleaching for both groups (p < 0.05).
CONCLUSIONS: The addition of one contact surface does not result in an increased whitening degree compared to bleaching applied solely on the buccal surface.
CONCLUSIONS: Understanding the influence of surfaces interacting with the bleaching agent is crucial for comprehending the bleaching mechanism and avoiding unnecessary material expenses. Notably, employing the buccal-only technique is sufficient to achieve the desired efficacy.