Effect of Light Curing Mode and Type on Conversion of Resin Composites.

The West Indian medical journal Pub Date : 2017-07-14 DOI:10.7727/wimj.2015.031

C Kucukesmen, A. Usumez, B. Uludag, B. Gunduz, C H Kucukesmen, O. Acar

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Abstract

Objective To determine the efficacy of polymerization for two different curing units by examining the degree of conversion (DC) of seven different composite materials. Materials and methods Conventional halogen light (40 s) and a light-emitting diode curing unit (LED) [20 s] were used to polymerize seven different composite brands. A total number of 70 specimens were evaluated (n = 5). To determine the degree of conversion, Fourier transformation infrared spectroscopy was used. For statistical analysis, two-way analysis of variance (ANOVA) and Tukey's HSD post hoc test were applied (α = 0.05). Results Degree of conversion varied with both the light unit and type of composite, with significant interactions. Charisma (67.0 ± 6.0) and Z-250 (65.2 ± 3.3) showed the highest DC when cured using the LED, whereas Grandio (38.2 ± 3.5) showed the lowest when exposed to the conventional halogen light. Conclusion Degree of conversion was affected by the type of light curing units and results varied greatly with respect to composite brand and type (nonofilled, macrofilled, hybrid, microhybrid and ormocer).

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光固化方式和类型对树脂复合材料转化的影响。

目的通过考察7种不同复合材料的转化率(DC)，确定两种不同固化单元的聚合效果。材料与方法采用传统卤素光(40 s)和发光二极管固化单元(LED) [20 s]对7种不同的复合材料进行聚合。总共评估了70个标本(n = 5)。为了确定转换程度，使用傅里叶变换红外光谱。统计学分析采用双因素方差分析(ANOVA)和Tukey’s HSD事后检验(α = 0.05)。结果光单元和复合材料类型对转化程度的影响较大，且相互作用显著。当使用LED固化时，Charisma(67.0±6.0)和Z-250(65.2±3.3)的直流电流最高，而Grandio(38.2±3.5)在传统卤素光下的直流电流最低。结论光固化单元类型影响光固化转换的程度，不同的复合品牌和类型(非填充型、宏填充型、混合型、微混合型和普通混合型)光固化效果差异较大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The West Indian medical journal

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