热固化周期对未填充聚甲基丙烯酸甲酯牙齿颜色稳定性的影响。
The Influence of Thermal Curing Cycles on the Color Stability of Unfilled Polymethyl Methacrylate Teeth.
作者信息
Basany Ram, Bandela Vinod, Nandalur Kulashekar Reddy, Vinnekota Dileep Nag, Metta Kiran Kumar, Mempally Hari Kumar, Kanaparthi Saraswathi
机构信息
Prosthodontics, Sri Venkata Sai (SVS) Institute of Dental Sciences, Mahbubnagar, IND.
Prosthetic Dental Sciences, College of Dentistry, Jouf University, Sakaka, SAU.
出版信息
Cureus. 2022 Mar 17;14(3):e23265. doi: 10.7759/cureus.23265. eCollection 2022 Mar.
PURPOSE
The purpose of this study was to evaluate the influence of water bath polymerization cycles on the color stability of unfilled polymethyl methacrylate (PMMA) teeth.
MATERIALS AND METHODS
A total of 72 samples of unfilled PMMA were divided into two groups. Group 1 was subjected to a short curing cycle and group 2 to a long thermal curing cycle. Color measurements were done using a spectrophotometer and evaluated by the Commission Internationale de l'Eclairage (CIE) Lab* color system. Color difference (∆E) was calculated before and after thermal curing cycles and the data were statistically analyzed.
RESULTS
Group 2 teeth exhibited the highest ΔE values and color change to long curing cycle with significant difference between them.
CONCLUSION
All the ΔE values were below 3.3, indicating that the color changes are not clinically perceptible.
目的
本研究的目的是评估水浴聚合周期对未填充聚甲基丙烯酸甲酯（PMMA）牙齿颜色稳定性的影响。
材料与方法
总共72个未填充PMMA样本被分为两组。第1组进行短固化周期，第2组进行长热固化周期。使用分光光度计进行颜色测量，并通过国际照明委员会（CIE）Lab*颜色系统进行评估。在热固化周期前后计算颜色差异（∆E），并对数据进行统计分析。
结果
第2组牙齿表现出最高的∆E值，且颜色随长固化周期发生变化，两组之间存在显著差异。
结论
所有∆E值均低于3.3，表明颜色变化在临床上无法察觉。
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