Herminio Ometto University Center, School of Dentistry, Araras, SP, Brazil.
Lasers Med Sci. 2024 Aug 15;39(1):217. doi: 10.1007/s10103-024-04161-5.
This in vitro study aimed to investigate potential changes in the color and roughness of dental enamel resulting from the use of different toothpaste formulations during bleaching with violet LED light (405 nm). Sixty specimens of bovine incisors, each measuring 6 × 6 × 3 mm, were segregated into six distinct experimental groups based on their respective treatments (n = 10): C + VL: Brushing with Colgate Total 12 + bleaching with violet LED; LB + VL: Brushing with Colgate Luminous White Brilliant + bleaching with violet LED; LI + VL: Brushing with Colgate Luminous White Instant + violet LED bleaching; C: Brushing with Colgate Total 12; LB: Brushing with Colgate Luminous White Brilliant; LI: Brushing with Colgate Luminous White Instant. The examined variables included alterations in color (∆L*, ∆a*, ∆b*, ∆Eab, and ∆E00), surface roughness (Ra), and scanning electron microscopy observations. No statistically significant distinctions emerged in total color variations (∆E00 and ∆E) among the groups under scrutiny. Notably, the groups that employed Colgate Luminous White Instant displayed elevated roughness values, irrespective of their association with violet LED, as corroborated by scanning electron microscopy examinations. It can be concluded that whitening toothpastes associated to violet LED do not influence the color change of dental enamel in fifteen days of treatment. Toothpastes with a higher number of abrasive particles showed greater changes in enamel roughness, regardless of the use of violet LED.
本体外研究旨在探究在使用 405nm 紫光灯对牙齿进行漂白过程中，不同牙膏配方对牙釉质颜色和粗糙度变化的潜在影响。
实验选取 60 颗牛切牙样本，每颗样本大小为 6x6x3mm，根据不同处理方式分为 6 个实验组（每组 10 个样本）：C+VL：Colgate Total 12 刷牙+紫光灯漂白；LB+VL：Colgate Luminous White Brilliant 刷牙+紫光灯漂白；LI+VL：Colgate Luminous White Instant 刷牙+紫光灯漂白；C：Colgate Total 12 刷牙；LB：Colgate Luminous White Brilliant 刷牙；LI：Colgate Luminous White Instant 刷牙。
实验观察了颜色变化（∆L*、∆a*、∆b*、∆Eab 和 ∆E00）、表面粗糙度（Ra）和扫描电子显微镜观察。结果显示，实验组之间的总颜色变化（∆E00 和 ∆E）没有显著差异。值得注意的是，无论是否与紫光灯联合使用，使用 Colgate Luminous White Instant 的组均显示出较高的粗糙度值，扫描电子显微镜检查也证实了这一点。
综上，本研究表明在 15 天的治疗期间，与紫光灯联合使用的美白牙膏不会影响牙釉质的颜色变化。具有较高磨料颗粒数的牙膏会导致牙釉质粗糙度更大的变化，无论是否使用紫光灯。
