Investigation of mechanical performances and polymerization shrinkage of dual-cured resin composites as core build-up material

被引：4

作者：

Chan, Sin Man ^{[1
]}

Guo, Jiawen ^{[1
]}

Aregawi, Wondwosen A. ^{[2
]}

Yang, Jiajun ^{[1
]}

Fok, Alex ^{[2
]}

Wang, Yan ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Guanghua Sch Stomatol, Guangdong Prov Key Lab Stomatol, Hosp Stomatol, Guangzhou 510055, Peoples R China

[2] Univ Minnesota, Minnesota Dent Res Ctr Biomat & Biomech, Sch Dent, Minneapolis, MN 55455 USA

来源：

DENTAL MATERIALS JOURNAL | 2021年 / 40卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Core build-up material; Mechanical behavior; Bond strength; Polymerization shrinkage; BOND STRENGTH; RESTORATION; HARDNESS; MODULUS; SYSTEMS; STRESS; FILLER; DENTIN; POST;

D O I：

10.4012/dmj.2020-237

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

This study systematically compared the mechanical performances and polymerization shrinkage of two novel dual-cured resin composites (DCRC) with one conventional packable light-cured resin composite (LCRC) for their application as core build-up material by micro-hardness test, flexural strength test, push-out test, and digital image correlation analysis. The LCRC had a significantly higher micro-hardness (p<0.05) whereas the bond strength demonstrated no difference. The mean values of three materials ranged from 35.16 and 64.82 for the Vickers hardness and from 4.66 MPa to 11.53 MPa for the bond strength. The flexure strength of the three materials was not statistically different from each other. LCRC demonstrated 1.88% of volumetric shrinkage while the two DCRC showed 5.06% and 4.91%, respectively. In general, the DCRC demonstrated a comparable flexural strength and bond strength as the LCRC, however, the significant polymerization shrinkage of DCRC should be emphasized.

引用

页码：1217 / 1225

页数：9

共 34 条

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