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大块充填和传统复合树脂的物理及光弹性性能

Physical and photoelastic properties of bulk-fill and conventional composites.

作者信息

Pereira Renata, Giorgi Maria Cecília Caldas, Lins Rodrigo Barros Esteves, Theobaldo Jéssica Dias, Lima Débora Alves Nunes Leite, Marchi Giselle Maria, Aguiar Flávio Henrique Baggio

机构信息

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP 13.414-903, Brazil,

Department of Operative Dentistry, School of Health Sciences, State University of Amazonas, Manaus, AM 69065-001, Brazil.

出版信息

Clin Cosmet Investig Dent. 2018 Dec 12;10:287-296. doi: 10.2147/CCIDE.S184660. eCollection 2018.

DOI:10.2147/CCIDE.S184660
PMID:30588124
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6296192/
Abstract

PURPOSE

This study evaluated the influence of thickness increment on degree of conversion (DC), Knoop microhardness (KHN), and polymerization-shrinkage stress (PSS) by photoelasticity of three dental composites.

METHODS

For DC and KHN, 45 samples were prepared and divided into nine groups (n=5), according to composite (microhybrid [Filtek Z250 - Z250], bulk-fill flowable [SureFil SDR Flow - SDR], and nanohybrid composite [N'Durance - NDU]) and increment thickness (1, 1.5, and 3 mm). PSS was measured by photoelastic analysis. Composites were placed into a photo-elastic model cavity and light-cured. DC and KHN data were subjected to two-way ANOVA and Bonferroni post hoc test. PSS results were qualitatively evaluated through Kruskal-Wallis test.

RESULTS

SDR showed the highest DC values. At top and bottom surfaces, the highest KHN was obtained by Z250. Z250 showed higher PSS than SDR in 1.5 mm increments. NDU showed higher PSS than SDR in 3 mm increments.

CONCLUSION

The bulk-fill composite demonstrated better DC and similar KHN and PSS in deeper layers compared to conventional composites. Bulk-fill composites may perform as well as conventional nanohybrid and microhybrid composites.

摘要

目的

本研究通过对三种牙科复合材料进行光弹性分析，评估厚度增加对固化程度（DC）、努氏显微硬度（KHN）和聚合收缩应力（PSS）的影响。

方法

对于DC和KHN，制备45个样本，并根据复合材料类型（微混合复合材料[Filtek Z250 - Z250]、大块充填可流动复合材料[SureFil SDR Flow - SDR]和纳米混合复合材料[N'Durance - NDU]）和增量厚度（1、1.5和3毫米）分为九组（n = 5）。通过光弹性分析测量PSS。将复合材料放入光弹性模型腔中并进行光固化。DC和KHN数据进行双向方差分析和Bonferroni事后检验。PSS结果通过Kruskal - Wallis检验进行定性评估。

结果

SDR显示出最高的DC值。在顶面和底面，Z250获得了最高的KHN。在1.5毫米增量时，Z250的PSS高于SDR。在3毫米增量时，NDU的PSS高于SDR。

结论

与传统复合材料相比，大块充填复合材料在较深层表现出更好的DC以及相似的KHN和PSS。大块充填复合材料的性能可能与传统纳米混合和微混合复合材料相当。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7731/6296192/2407c2074f52/ccide-10-287Fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7731/6296192/c46196e8cc97/ccide-10-287Fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7731/6296192/00c60fcd6598/ccide-10-287Fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7731/6296192/2407c2074f52/ccide-10-287Fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7731/6296192/c46196e8cc97/ccide-10-287Fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7731/6296192/00c60fcd6598/ccide-10-287Fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7731/6296192/2407c2074f52/ccide-10-287Fig3.jpg

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