中半透明单片氧化锆厚度和光固化时间对双固化树脂胶结物聚合的影响

Q4 Dentistry
Raghad S. Jamel
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引用次数: 0

摘要

目的:研究和比较不同厚度的中半透明单片氧化锆和光固化次数对两种双固化树脂水泥聚合性能的影响。方法:采用TheraCem和RelyX U200水泥制备200个水泥标本。标本分为5组:ⅰ组,不加氧化锆;第二组,厚度0.50 mm;III组,1.00 mm;IV组,1.50 mm;V组,厚度2.00 mm。每组再分为(1)RelyX U200和(2)TheraCem。每个亚组根据光固化时间细分为(a) 20 s和(b) 40 s (n =5)。采用傅里叶变换红外光谱(FTIR)和维氏显微硬度计对聚合反应进行了测试。数据采用方差分析、独立样本t检验和Tukey检验,显著性水平为0.05。结果:对照组DC和VMH最高,分别为0.50、1.00、1.50 mm, 2.00 mm组最低。辐照40 s的标本DC和VMH高于辐照20 s的标本。与TheraCem水泥相比,RelyX U200的这两个参数值更高。结论:自粘水泥的聚合作用取决于单片氧化锆的厚度、光固化时间和水泥的成分。为了克服氧化锆的光衰减,应延长水泥的辐照时间。tegdma基自粘水泥的DC和VMH均高于bisgma基水泥。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of medium-translucency monolithic zirconia thicknesses and light-curing time on the polymerization of dual-cure resin cements
Aim: To investigate and compare the effects of different thicknesses of medium-translucency monolithic zirconia and light curing times on the polymerization of two types of dual-cured resin cement. Methods: A total of 200 cement specimens were prepared from TheraCem and RelyX U200 cement. The specimens were divided into 5 groups: Group I, without interposing zirconia; Group II, 0.50 mm thickness; Group III, 1.00 mm; Group IV, 1.50 mm; and Group V, 2.00 mm thickness. Each group was subdivided into (1) RelyX U200 and (2) TheraCem. Each subgroup was subdivided according to the light-curing time into (a) 20 s and (b) 40 s (n =5). The polymerization was tested using Fourier-transform infrared (FTIR) spectroscopy and a Vickers microhardness tester. The data were statistically analyzed using ANOVA, an independent sample t-test, and Tukey’s test at a significance level of 0.05. Results: The control group had the highest values of DC and VMH, followed by 0.50, 1.00, and 1.50 mm, respectively, while the 2.00 mm group showed the lowest values. The specimens irradiated for 40 s had greater DC and VMH than those irradiated for 20 s. RelyX U200 revealed higher values for both parameters compared to TheraCem cement. Conclusion: The polymerization of selfadhesive cement depends on the thickness of the monolithic zirconia, the light curing time, and the composition of the cement. The cement should be irradiated for a longer period than recommended to overcome the light attenuation of zirconia. TEGDMA-based self-adhesive cement showed a higher DC and VMH than BISGMA-based cement.
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来源期刊
Brazilian Journal of Oral Sciences
Brazilian Journal of Oral Sciences Dentistry-Dentistry (all)
CiteScore
0.60
自引率
0.00%
发文量
52
审稿时长
20 weeks
期刊介绍: The Brazilian Journal of Oral Sciences is an international non-profit journal, which publishes full-Length papers, original research reports, literature reviews, special reports, clinical cases, current topics and short communications, dealing with dentistry or related disciplines.
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