The effect of curing light variations on bulk curing and wall-to-wall quality of two types and various shades of resin composites
The effect of curing light variations on bulk curing and wall-to-wall quality of two types and various shades of resin composites
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DOI：
10.1016/s0109-5641(97)80105-4
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发表时间：
1997-09-01
期刊：
影响因子：
5
通讯作者：
Erdilek, N
中科院分区：
文献类型：
--
作者：
Davidson-Kaban, SS;Davidson, CL;Erdilek, N
目标.本研究评估了光强度和照射时间的变化对两种类型和各种色调的树脂复合材料的固化效果的影响，以及降低光强度对保持墙到墙连续性的影响。本研究中使用了三种微填充复合材料（三种不同的色调）和一种混合复合材料。在光强度为175和700 mW/cm（2），照射时间为10和60 s的条件下，测定牙本质洞内粘接剂的聚合收缩率、硬度和适应性。数据采用一般线性模型分析。收缩测量是转化率和转化率的指示。降低的强度减慢了聚合速率，但只要采用60 s的照射时间就不会降低转化率。高能量照射导致复合材料与牙齿结构的分离增加。在获得最佳转化率和适应性的基础上，论证了辐照时间比辐照能量更有效。光固化复合材料需要了解其结构、着色和辐照参数，以获得最佳性能。高强度光固化并不一定能达到最佳质量。
Objectives. This study evaluated the influence of light intensity and irradiation time variations on the curing efficacy of two types and various shades of resin composites and the effect of reduced light intensity on the preservation of wall-to-wall continuity.Materials and Methods. Three microfilled composites (in three different shades) and one hybrid composite were used in this study. Polymerization shrinkage, and the hardness and adaptation of adhesive restorations in dentin cavities were determined at light intensities of 175 and 700 mW/cm(2) and irradiation times of 10 and 60 s. Data were compared using in a general linear model analysis.Results. Shrinkage measurements were the indication of conversion and conversion rate. Reduced intensity slowed down the rate of polymerization but did not reduce the conversion as long as an irradiation time of 60 s was employed. High-energy irradiation caused increased separation of the composite from the tooth structure. On the basis of obtaining optimal conversion and adaption, it was demonstrated that the irradiation time to be more effective than irradiation energy.Significance. Light-cured composites require an understanding of their structure, pigmentation and irradiation parameters to obtain optimal performance. High intensity light-curing does not necessarily lead to optimal quality.