TY - JOUR
T1 - Investigation of mechanical performances and polymerization shrinkage of dual-cured resin composites as core build-up material
AU - Chan, Sin Man
AU - Guo, Jiawen
AU - Aregawi, Wondwosen A.
AU - Yang, Jiajun
AU - Fok, Alex
AU - Wang, Yan
N1 - Publisher Copyright:
© 2021, Japanese Society for Dental Materials and Devices. All rights reserved.
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Bond strength
KW - Core build-up material
KW - Mechanical behavior
KW - Polymerization shrinkage
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U2 - 10.4012/dmj.2020-237
DO - 10.4012/dmj.2020-237
M3 - Article
C2 - 34121020
AN - SCOPUS:85114327330
SN - 0287-4547
VL - 40
SP - 1217
EP - 1225
JO - Dental Materials Journal
JF - Dental Materials Journal
IS - 5
ER -