Farahani Shakiba, Faghihi Taraneh, Ranjbar Omrani Ladan, Chiniforush Nasim, Ahmadi Elham, Karimi Mandana, Abbasi Mahdi
Department of Restorative Dentistry, Dental School, Tehran University of Medical Sciences, Tehran, Iran.
Department of Pediatric Dentistry, Faculty of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran.
Int J Dent. 2023 Jul 28;2023:9912560. doi: 10.1155/2023/9912560. eCollection 2023.
The present study investigated the effects of laser and conventional in-office bleaching, and polishing on the color of stained composite resin.
A microhybrid composite (Clearfil AP-X) and a nanohybrid composite (Grandio) were selected. Twenty-four discs (2 × 10 mm) for each composite were prepared. The samples were immersed in coffee solution (25 g of coffee in 250 mL water) for seven days. Then the samples were divided into three groups ( = 8) and the stains were removed using bleaching (with Opalescence Xtra Boost), diode laser irradiation with Heydent material and a Sof-Lex polishing kit. The color parameters were determined using a spectrophotometer before and after immersion and after stain removal procedures, and the overall color changes () were calculated. The data were analyzed with two-way analysis of variance.
In the Clearfil composite resin group, the mean compared to the baseline using in-office bleaching, laser irradiation, and Sof-Lex polishing kit were 3.31, 3.35, and 4.93, respectively. These values with the Grandio composite resin were 3.31, 6.35, and 4.57, respectively. The highest capacity to remove stains was related to the conventional in-office bleaching method. Grandio composite resin underwent more color changes than Clearfil composite resin significantly (-value < 0.05).
Both composite resins exhibited color changes after immersion in the discoloring solution. However, after staining-removing procedures, the values decreased. Decreases in the values were not sufficient to restore the color to that before immersion in the discoloring solution with any stain-removing methods.
本研究调查激光和传统诊室漂白以及打磨对染色复合树脂颜色的影响。
选择一种微混合复合树脂（Clearfil AP-X）和一种纳米混合复合树脂（Grandio）。每种复合树脂制备24个圆盘（2×10毫米）。将样本浸入咖啡溶液（250毫升水中含25克咖啡）中7天。然后将样本分为三组（每组 = 8个），使用漂白剂（Opalescence Xtra Boost）、用Heydent材料进行二极管激光照射以及Sof-Lex打磨套装去除污渍。在浸泡前、浸泡后以及污渍去除程序后，使用分光光度计测定颜色参数，并计算总体颜色变化（）。数据采用双向方差分析进行分析。
在Clearfil复合树脂组中，与基线相比，使用诊室漂白、激光照射和Sof-Lex打磨套装后的平均分别为3.31、3.35和4.93。Grandio复合树脂的这些值分别为3.31、6.35和4.57。去除污渍能力最强的是传统诊室漂白方法。Grandio复合树脂比Clearfil复合树脂经历的颜色变化更显著（-值 < 0.05）。
两种复合树脂在浸入变色溶液后均出现颜色变化。然而，在污渍去除程序后，值下降。用任何污渍去除方法，值的下降都不足以将颜色恢复到浸入变色溶液前的状态。
