Fathpour Kamyar, Salehi Alaleh, Samimi Pouran, Fathi Amirhossein
Department of Restorative Dentistry Dental Materials Research Center Dental Research Institute School of Dentistry Isfahan University of Medical Sciences, Isfahan, Iran.
Dental Students Research Committee School of Dentistry Isfahan University of Medical Sciences, Isfahan, Iran.
Int J Dent. 2024 Sep 27;2024:5514821. doi: 10.1155/2024/5514821. eCollection 2024.
This study aims to evaluate the color-matching ability of OMNICHROMA composite, a single-shade composite, using the CIE L a b system and determining E values. In this in vitro study, 30 intact premolar teeth were collected, cleaned, and disinfected with 0.5% thymol solution. The teeth were stored in distilled water at 37°C. A putty index calibrated the color assessment sites on buccal and lingual surfaces. Two cavities were prepared, one with 1.25 mm depth (enamel) and another with 2.25 mm depth (dentin), and restored using OMNICHROMA composite resin. The putty index measured the color of the cured composite, and E between the composite and original tooth color was calculated. Data analysis included -tests, correlation coefficients, and Fisher's exact test ( = 0.05). The mean E was 2.39 in enamel cavities and 2.32 in dentin cavities, both within the clinically acceptable range (<3.3). In enamel cavities, the composite color was darker than the tooth, shifting toward green and blue shades. In dentin cavities, the composite color was lighter than the tooth, with shifts toward green and yellow shades. Color matching was slightly better in dentin cavities, but the difference was not statistically significant (=0.719). OMNICHROMA composite resin's color matching falls within the clinically acceptable range, unaffected by cavity depth.
本研究旨在使用CIE Lab*系统并测定E值，评估单色调复合材料OMNICHROMA复合材料的颜色匹配能力。在这项体外研究中，收集了30颗完整的前磨牙，用0.5%百里酚溶液进行清洁和消毒。牙齿保存在37°C的蒸馏水中。用一种油灰指数校准颊面和舌面的颜色评估部位。制备两个洞，一个洞深1.25毫米（釉质），另一个洞深2.25毫米（牙本质），并用OMNICHROMA复合树脂进行修复。油灰指数测量固化复合材料的颜色，并计算复合材料与原始牙齿颜色之间的E值。数据分析包括t检验、相关系数和Fisher精确检验（α = 0.05）。釉质洞中的平均E值为2.39，牙本质洞中的平均E值为2.32，均在临床可接受范围内（<3.3）。在釉质洞中，复合材料颜色比牙齿深，向绿色和蓝色色调偏移。在牙本质洞中，复合材料颜色比牙齿浅，向绿色和黄色色调偏移。牙本质洞中的颜色匹配略好，但差异无统计学意义（P = 0.719）。OMNICHROMA复合树脂的颜色匹配在临床可接受范围内，不受洞深影响。
