赵珂宁,王洁,孙健.冷热循环对树脂-陶瓷复合材料颜色稳定性的影响[J].口腔材料器械杂志,2025,34(3):137-141,152.
冷热循环对树脂-陶瓷复合材料颜色稳定性的影响
Effect of thermocycling on the color stability of resin-matrix ceramic composites
投稿时间:2024-12-13  修订日期:2025-01-20
DOI:10.11752/j.kqcl.2025.03.02
中文关键词:  CAD/CAM树脂陶瓷复合材料  冷热循环  光学性能  颜色稳定性
英文关键词:CAD/CAM resin-matrix ceramic composites  Thermocycling  Optical properties  Color stability
基金项目:上海市卫健委青年项目(20224Y0356)
作者单位E-mail
赵珂宁 上海交通大学医学院附属第九人民医院口腔医学院修复科, 上海交通大学口腔医学院, 国家口腔医学中心, 国家口腔疾病临床医学研究中心, 上海市口腔医学重点实验室, 上海市口腔医学研究所, 上海 200011  
王洁 上海交通大学医学院附属第九人民医院口腔医学院修复科, 上海交通大学口腔医学院, 国家口腔医学中心, 国家口腔疾病临床医学研究中心, 上海市口腔医学重点实验室, 上海市口腔医学研究所, 上海 200011 quanjiaowangjie@sjtu.edu.cn 
孙健 上海交通大学医学院附属第九人民医院口腔医学院修复科, 上海交通大学口腔医学院, 国家口腔医学中心, 国家口腔疾病临床医学研究中心, 上海市口腔医学重点实验室, 上海市口腔医学研究所, 上海 200011 doctorsunjian74@aliyun.com 
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中文摘要:
      目的 比较不同透明度、厚度、材料种类对 CAD/CAM 树脂-陶瓷复合材料(RMCs)冷热循环前后光学性能及其变化情况的影响,以评价这类新型材料的颜色稳定性。方法 选取高透明度与低透明度的3种 RMCs:Hy(Hyramic),LU(Lava Ultimate),VE(Vita Enamic)作为实验组,以二硅酸锂玻璃陶瓷 UP(UP.CAD)作为对照组,厚度分组为0.5 mm与1.0 mm。分别在冷热循环0、10000、20000、30000、40000次时(高温55℃,低温 5℃,停留时间 30 s)使用分光光度计检测 L*,a*,b*值,计算 ΔE00值,并进行统计学分析。结果 不同透明度和厚度显著影响陶瓷材料的 L*,a*,b*值(P<0.05)。不同材料间,L*值依次为:LU>VE>UP>Hy;a*值依次为:Hy>VE>UP>LU;b*值依次为:VE>Hy>UP>LU。冷热循环10000次后Hy的ΔE00超过50%人群可接受阈值,0.5 mm LT LU 与 0.5 mm HT VE 的 ΔE00分别在冷热循环 20000 次、30000 次后超过 50% 人群可感知阈值。其余材料经40000次冷热循环后的ΔE00均未超过可感知阈值。结论 树脂-陶瓷复合材料冷热循环前后的光学性能与材料的透明度、厚度、种类密切相关。透明度越高,厚度越厚,树脂基陶瓷越暗、越红、越黄。树脂-陶瓷复合材料中Hy、LU、VE的颜色改变分别于冷热循环10000、20000、30000次后可被感知到,其颜色稳定性劣于玻璃陶瓷。
英文摘要:
      Objective The aim was to evaluate the effects of translucency, thickness, and material type on the optical properties and their changes in CAD/CAM resin-matrix ceramics (RMCs) before and after thermocycling, to assess the color stability of these new materials. Methods Three types of RMCs: Hy (Hyramic), LU (Lava Ultimate), and VE (Vita Enamic), were used as experimental groups, and lithium disilicate glass-ceramic UP (UP.CAD) served as the control group. Specimens were prepared in two thicknesses (0.5 mm and 1.0 mm). Thermocycling was performed for 0, 10,000, 20,000, 30,000, and 40,000 cycles (5 °C and 55 °C, 30-second dwell time). A spectrophotometer was used to measure L*, a*, and b* values at each interval, and ΔE00 values were calculated. Statistical analyses were performed. Results Translucency and thickness significantly influenced the L*, a*, and b* values of all ceramic materials (P<0.05). The L* values followed the order: LU > VE > UP > Hy; a* values: Hy > VE > UP > LU; b* values: VE > Hy > UP > LU. After 10,000 cycles, the ΔE00 of Hy exceeded the 50% of the population acceptability threshold. ΔE00 values for 0.5 mm LT LU and 0.5 mm HT VE exceeded the 50% of the population perceptibility threshold after 20,000 and 30,000 cycles, respectively. All other materials remained below the perceptibility threshold even after 40,000 cycles. Conclusion The optical properties of RMCs before and after thermocycling are closely related to material translucency, thickness, and type. Higher translucency and greater thickness of RMCs were associated with lower brightness (L*), and higher red (a*) and yellow (b*) values. Color changes in Hy, LU, and VE became perceptible after 10,000, 20,000, and 30,000 cycles, respectively, indicating that the color stability of these RMCs is inferior to that of lithium disilicate glass-ceramic.
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