Novel dental composites reinforced with zirconia-silica ceramic nanofibers.
Novel dental composites reinforced with zirconia-silica ceramic nanofibers.
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DOI：
10.1016/j.dental.2011.11.006
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发表时间：
2012-04
期刊：
影响因子：
5
通讯作者：
Xu, Xiaoming
中科院分区：
文献类型：
--
作者：
Guo, Guangqing;Fan, Yuwei;Zhang, Jian-Feng;Hagan, Joseph L.;Xu, Xiaoming
关键词：
制备和表征用不同量的氧化锆-二氧化硅（ZS）或氧化锆-氧化钇-二氧化硅（ZYS）陶瓷纳米纤维增强的牙科复合材料。对照复合材料（70wt%玻璃颗粒填料，无纳米纤维）和实验复合材料（2.5wt%、5.0wt%和7.5wt% ZS或ZYS纳米纤维替代玻璃颗粒填料）通过混合29wt%牙科树脂单体、70wt%填料和1.0wt%引发剂制备，并通过加热或牙科固化光聚合。在37 °C去离子水中储存24 h、3个月或6个月后，测试弯曲强度（FS）、弯曲模量（FM）、断裂能（EAB）和断裂韧性（FT）。使用傅里叶变换近红外（FT-NIR）光谱测量复合材料中单体的转化度（DC）。通过场发射扫描电子显微镜（FE-SEM）观察断裂表面。使用ANOVA分析数据，Tukey诚实显著差异检验用于事后分析。添加2.5%或5.0%的ZS或ZYS纳米纤维增强牙科复合材料可显著提高牙科复合材料的FS、FM和EAB。然而，进一步增加ZS含量（7.5%），这些性能降低（尽管它们仍然高于对照）。添加纳米纤维并没有降低这些复合材料的长期力学性能。所有ZS增强复合材料（含有2.5%，5.0%和7.5% ZS纳米纤维）表现出显着更高的断裂韧性比对照。复合材料的直流电随ZS含量的增加而减小。在牙科复合材料中加入陶瓷纳米纤维可以显著改善其力学性能和断裂韧性，从而延长其使用寿命。
To fabricate and characterize dental composites reinforced with various amounts of zirconia-silica (ZS) or zirconia-yttria-silica (ZYS) ceramic nanofibers. Control composites (70 wt% glass particle filler, no nanofibers) and experimental composites (2.5, 5.0, and 7.5 wt% ZS or ZYS nanofibers replacing glass particle filler) were prepared by blending 29 wt% dental resin monomers, 70 wt% filler, and 1.0 wt% initiator, and polymerized by either heat or dental curing light. Flexural strength (FS), flexural modulus (FM), energy at break (EAB), and fracture toughness (FT) were tested after the specimens were stored in 37 °C deionized water for 24 h, 3 months, or 6 months. Degree of conversion (DC) of monomers in composites was measured using Fourier transformed near-infrared (FT-NIR) spectroscopy. Fractured surfaces were observed by field-emission scanning electron microscope (FE-SEM). The data were analyzed using ANOVA with Tukey’s Honestly Significant Differences test used for post hoc analysis. Reinforcement of dental composites with ZS or ZYS nanofibers (2.5% or 5.0%) can significantly increase the FS, FM and EAB of dental composites over the control. Further increase the content of ZS nanofiber (7.5%), however, decreases these properties (although they are still higher than those of the control). Addition of nanofibers did not decrease the long-term mechanical properties of these composites. All ZS reinforced composites (containing 2.5%, 5.0% and 7.5% ZS nanofibers) exhibit significantly higher fracture toughness than the control. The DC of the composites decreases with ZS nanofiber content. Incorporation of ceramic nanofibers in dental composites can significantly improve their mechanical properties and fracture toughness and thus may extend their service life.
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影响因子：
7.6
作者：
SUZUKI, H;TAIRA, M;YAMAKI, M
通讯作者：
YAMAKI, M
影响因子：
4.6
作者：
Knobloch, LA;Kerby, RE;Clelland, N
通讯作者：
Clelland, N
DOI：
10.1308/135576101771799335
发表时间：
2001-01-01
期刊：
Primary dental care : journal of the Faculty of General Dental Practitioners (UK)
影响因子：
--
作者：
Deligeorgi, V;Mjor, I A;Wilson, N H
通讯作者：
Wilson, N H
影响因子：
9.1
作者：
Lin, Song;Cai, Qing;Deng, Xuliang
通讯作者：
Deng, Xuliang
影响因子：
7.6
作者：
Ling, L.;Xu, X.;Diwan, R. M.
通讯作者：
Diwan, R. M.