两种不同超快固化曝光持续时间对块状填充复合材料表面硬度的影响--体外研究。

Q3 Dentistry
Indian Journal of Dental Research Pub Date : 2023-10-01 Epub Date: 2024-04-19 DOI:10.4103/ijdr.ijdr_5_23
Shekar Shobana, Anandavelu Sujareetha, Sundaresan Balagopal, Sarath Kumar, Sriganesh Angusamy, Sebatni Anisha
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引用次数: 0

摘要

目的:本研究的目的是评估在两种不同曝光持续时间下采用超快固化模式固化的树脂基复合材料(RBC)的微硬度:研究设计:这是一项体外实验研究。制备了 45 个圆柱形复合材料试样,高度为 5 毫米,直径为 4 毫米。使用以下三种不同的曝光模式和持续时间,用双模 LED 固化灯进行固化:第一组:2300 mW/cm2 下 1 秒钟的超快固化模式(n = 15);第二组:2300 mW/cm2 下 3 秒钟的超快固化模式(n = 15);第三组:1000 mW/cm2 下 20 秒钟的标准曝光模式(n = 15)。使用电动金刚石面显微压头(Wilson Wolpwert,德国)对试样的固化面和非固化面进行维氏硬度测量,载荷为 50 克,停留时间为 30 秒:统计分析:采用 Kruskal Wallis 方差分析检验三组之间的差异,然后采用 Mann-Whitney U 检验进行事后分析:结果:使用传统固化装置固化的复合材料的显微硬度值明显高于超快固化试样:结论:低强度传统固化灯的性能优于高强度超快固化灯。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Two Different Ultrafast Curing Exposure Durations on the Surface Hardness of Bulk Fill Composite - An In-Vitro Study.

Aim: The aim of the present study is to assess the microhardness of resin-based composites (RBCs) cured with ultrafast curing mode at two different exposure durations.

Study design: This is an experimental in-vitro study. Forty-five cylindrical composite specimens were prepared to a dimension of 5 mm height and 4 mm diameter. Curing was done using three different exposure modes and duration with dual mode LED curing light as follows: Group I: Ultrafast curing mode for 1 second at 2300 mW/cm2 (n = 15); Group II: Ultrafast curing mode for 3 second at 2300 mW/cm2 (n = 15) and Group III: Standard exposure mode for 20 second at 1000 mW/cm2 (n = 15). Vicker's microhardness measurement was done on both the curing and non-curing sides of the specimen using a motorised diamond-faced micro-indenter (Wilson Wolpwert, Germany) using a load of 50 gram and a dwell time of 30 second.

Statistical analysis: Kruskal Wallis ANOVA was used to test for difference between the three groups followed by Mann-Whitney U test for post-hoc analysis.

Results: The microhardness values of the composite cured with a conventional curing unit were significantly higher than the ultrafast cured specimens.

Conclusion: Low-intensity conventional curing lights were found to perform better than the high-intensity ultrafast curing units.

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来源期刊
Indian Journal of Dental Research
Indian Journal of Dental Research Dentistry-Dentistry (all)
CiteScore
1.80
自引率
0.00%
发文量
80
审稿时长
38 weeks
期刊介绍: Indian Journal of Dental Research (IJDR) is the official publication of the Indian Society for Dental Research (ISDR), India section of the International Association for Dental Research (IADR), published quarterly. IJDR publishes scientific papers on well designed and controlled original research involving orodental sciences. Papers may also include reports on unusual and interesting case presentations and invited review papers on significant topics.
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