Araghi Solmaz, Khavid Atefeh, Godiny Mostafa, Saeidipour Mahshid
Department of Endodontics, Islamic Azad University, Dental Branch, Tehran, Iran.
Department of Oral and Maxillofacial Radiology, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Dent Res J (Isfahan). 2019 Jan-Feb;16(1):53-59.
This study sought to assess and compare coronal discoloration following the application of white mineral trioxide aggregate, Biodentine, and calcium-enriched mixture cement in endodontically treated teeth.
In this experimental study, 64 freshly extracted sound human premolars were selected, cleaned, and stored in saline. After cleaning, shaping, and obturation the root canal of the teeth, the teeth were randomly assigned to one control ( = 4) and three experimental ( = 20) groups. In the experimental groups, the cement were applied over the canal orifices in 3-mm thickness. All teeth were then restored with composite resin. Color parameters, according to the CIE Lab system, were measured using Vita Easyshade spectrophotometer before application of cement and at 1 week, 1 month, 2 months, and 3 months after the application of cement. The recorded values were statistically analyzed using descriptive and analytical statistics. For analytical statistics, Kolmogorov-Smirnov test was applied to assess normal distribution of data. ANOVA was used to compare the results at baseline and repeated measures. < 0.05 was considered statistically significant.
Significant differences were noted in color change (ΔE) between all time points except between ΔE4 (2 months) and ΔE5 (3 months) ( < 0.01). However, tooth discoloration caused by the three cement was not significantly different ( = 0.343).
The three tested cement were not significantly different in terms of causing coronal discoloration in endodontically treated teeth.
本研究旨在评估和比较在经牙髓治疗的牙齿中应用白色矿物三氧化物凝聚体、生物陶瓷和富钙混合水泥后的冠部变色情况。
在本实验研究中，选取64颗新鲜拔除的健康人类前磨牙，进行清洁并保存在盐水中。在对牙齿进行根管清理、成形和充填后，将牙齿随机分为1个对照组（n = 4）和3个实验组（n = 20）。在实验组中，将水泥以3毫米的厚度覆盖在根管口上。然后用复合树脂对所有牙齿进行修复。根据CIE Lab系统，在应用水泥前以及应用水泥后1周、1个月、2个月和3个月，使用Vita Easyshade分光光度计测量颜色参数。使用描述性和分析性统计方法对记录的值进行统计分析。对于分析性统计，应用Kolmogorov-Smirnov检验来评估数据的正态分布。使用方差分析来比较基线和重复测量的结果。P < 0.05被认为具有统计学意义。
除了ΔE4（2个月）和ΔE5（3个月）之间外，所有时间点的颜色变化（ΔE）均存在显著差异（P < 0.01）。然而，三种水泥引起的牙齿变色没有显著差异（P = 0.343）。
在导致经牙髓治疗的牙齿冠部变色方面，三种测试水泥没有显著差异。
