彩色饮料对青少年患者陶瓷托槽颜色的影响：一项随机临床试验。

Colour change of ceramic brackets with the use of coloured beverages in adolescent patients: A randomized clinical trial.

机构信息

Mansoura University, Faculty of Dentistry, Orthodontic Department, Mansoura, Egypt.

出版信息

Int Orthod. 2020 Jun;18(2):340-348. doi: 10.1016/j.ortho.2020.02.002. Epub 2020 Mar 5.

DOI:10.1016/j.ortho.2020.02.002

PMID:32147329

Abstract

OBJECTIVE

To clinically evaluate colour change of ceramic orthodontic brackets with the use of coloured beverages as ceramic brackets' resistance to discoloration has become a major concern.

MATERIAL AND METHODS

A prospective two parallel groups-split mouth randomized trial with a 1:1 allocation ratio. Two equal groups including 40 adolescent patients from the orthodontic department (Faculty of Dentistry, Mansoura University, Egypt), scheduled for maxillary premolar extractions were bonded with 2 types of mono-crystalline ceramic brackets: Type 1 (Inspire ICETM) and Type 2 (Radiance PlusTM). Participants in each group were asked to rinse with either black tea or Cola. After extraction, the colour of the 80 debonded brackets was compared to that of 20 control brackets from each type by spectrophotometer according to the international standard CIELAB colour space (CIE Lab*). The latter consists of three coordinates: L* (lightness value), a* and b* (the colour channels). The total colour difference ΔE* is the distance between two colours in this three-dimensional colour space. The colour change was also assessed by digital image analysis according to the RGB model.

RESULTS

Type 1 brackets showed mean ΔE* values of 2.24±0.25 in black tea and 1.76±0.1 in Cola groups (P<0.001), while Type 2 brackets showed means of 1.99±0.15 in black tea and 1.56±0.1 in Cola groups (P<0.001). The mean RGB values were 174.3±12.02 in black tea and 185.6±6.9 in the Cola groups of type 1 brackets (P<0.001), while were 166.5±17.8 in black tea and 190.8±8.9 in Cola groups of type 2 brackets (P<0.001).

CONCLUSION

Black tea showed more significant effect than Cola on the two bracket types. Bracket type affected the colour change in each beverage group.

摘要

目的

临床评估陶瓷正畸托槽的颜色变化，因为陶瓷托槽的抗变色性已成为一个主要关注点。

材料和方法

一项前瞻性、双平行组、随机分组试验，采用 1:1 分配比。将来自埃及曼苏拉大学牙科学院正畸科的 40 名青少年患者分为两组，每组 20 人，使用两种单晶陶瓷托槽进行粘接：I 型（Inspire ICETM）和 II 型（Radiance PlusTM）。每组患者分别用红茶或可乐漱口。拔牙后，用分光光度计根据国际标准 CIE LAB 颜色空间（CIE Lab*）比较 80 个脱粘的托槽和每个类型的 20 个对照托槽的颜色。后者由三个坐标组成：L*（亮度值）、a和 b（颜色通道）。总色差ΔE*是这三个颜色空间中两种颜色之间的距离。根据 RGB 模型，颜色变化也通过数字图像分析进行评估。

结果

I 型托槽在红茶组的平均 ΔE值为 2.24±0.25，在可乐组为 1.76±0.1（P<0.001），而 II 型托槽在红茶组的平均 ΔE值为 1.99±0.15，在可乐组为 1.56±0.1（P<0.001）。红茶组 I 型托槽的平均 RGB 值为 174.3±12.02，可乐组为 185.6±6.9（P<0.001），而红茶组 II 型托槽的平均 RGB 值为 166.5±17.8，可乐组为 190.8±8.9（P<0.001）。