Effect of bleaching agents on the color of indirect and direct composite resins
10.3760/cma.j.issn.1002-0098.2014.09.008
- VernacularTitle:漂白剂对复合树脂颜色影响的实验研究
- Author:
Wenzhong XING
1
;
Tao JIANG
;
Xiaodong CHEN
;
Yining WANG
Author Information
1. 大连市口腔医院修复科
- Keywords:
Color;
Composite resin;
Bleaching agent;
Color difference
- From:
Chinese Journal of Stomatology
2014;49(9):545-548
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effect of bleaching agents on the color of indirect and direct composite resins.Methods Five resin composite materials were tested in this in vitro study.The five composites were as follow:two indirect composite resins (Adoro SR,Ceramage) and three direct composite resins (Filtek Z350,Clearfil Majesty Esthetic,and Gradia Direct Anterior).For each material,twenty disk-shaped specimens were prepared and randomly divided into five groups according to the color parameters of specimens before bleaching treatment.The composite resin specimens were treated by one of five sample solutions which were at-home bleaching agents (10％ and 15％ carbarmide peroxide),in-office bleaching agents (38％ H2O2 and 35％ H2O2) and deionized water (control group).The color parameters of specimens were measured by spectrophotometer at baseline and after bleaching treatments.The color differences (ΔE values) between baseline and post-treatments were calculated.The data of color differences were evaluated statistically using two-way analysis with a significance level of 0.05.Results The color changes of the resin composites were less than 2.0 after bleaching agent treatment,therefore were not perceptible.Slight increase of L* values and decrease of C*ab values in color parameters of specimens were observed.There were statistically significant differences in ΔE values for different bleaching treatments and resin materials(P=0.001).Conclusions The bleaching agents did not affect the color of indirect and direct composite resins tested.
