The effect of "soft-start polymerization" on surface hardness of two packable composites.
The effect of "soft-start polymerization" on surface hardness of two packable composites.
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“软启动聚合”对两种可包装复合材料表面硬度的影响。
DOI：
10.4012/dmj.22.610
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发表时间：
2003
影响因子：
2.5
通讯作者：
F. Bayındır
中科院分区：
文献类型：
--
作者：
Y. Bayındır;M. Yildiz;F. Bayındır
据报道，在低强度下进行光引发预聚合，然后在全强度下进行光固化(软启动聚合)，可以得到边缘完整性得到改善的光固化复合填料。本研究的目的是考察不同方案的软启动聚合对不同包装复合材料维氏硬度的影响。用维氏压头测量了可包装复合材料的维氏硬度，并对其进行了评价。结果表明，与所采用的固化方式和固化尖端无关，Alert的维氏硬度显著高于Defined(p<；0.05)。固化方式和光导对测试样品的维氏硬度没有显著影响。综上所述，我们发现，与常规方法相比，软启动聚合对转化率没有显著影响。此外，不同的光头对表面硬度没有明显的改善。
It has been reported that light-initiated prepolymerization at low intensity followed by a post-light-cure at full intensity (soft-start polymerization) may lead to light-cured composite fillings with improved marginal integrity. The aim of this study was to examine the influence of softstart polymerization with different protocols on Vickers hardness of different packable composites. Vickers hardness of packable composites ALERT, and Definite were measured with a Vickers indenter and were evaluated. The results suggested that independent of the applied curing mode and curing tip, Alert showed significantly higher Vickers hardness than did Definite (p<0.05). There was no significant influence of curing mode or light guide on Vickers hardness of the samples tested. In conclusion, we found that soft-start polymerization does not have a significant influence on the degree of conversion, when compared with the conventional method. In addition, different light tips showed no significant improvement on surface hardness.