TY - JOUR
T1 - Flexural properties of resin composites:Influence of specimen dimensions and storage conditions
AU - Calheiros, Fernanda Calabró
AU - Pfeifer, Carmem S.Costa
AU - Brandão, Ludmila Lourenço
AU - Agra, Carlos Martins
AU - Ballester, Rafael Yagüe
PY - 2013
Y1 - 2013
N2 - This study evaluated the influence of specimen dimensions and storage medium and temperature on the flexural properties of one dental resin composite. The material utilized throughout the study was Clearfil AP-X. Eighty specimens were built with dimensions of either 10×2×2 mm or 25×2×2 mm, stored dry or in distilled water, at 25 or 37°C, for 24 h. Flexural strength and modulus were tested in three-point bending. Results were evaluated with three-way ANOVA and Tukey's test (α=0.05). Statistical significance was observed for all three factors: temperature (37°C=190.8 MPa, 25°C=165.3 MPa; p<0.01), storage medium (water=167.7 MPa, Dry=188.4 MPa; p<0.01) and specimen dimensions (10×2×2 mm=197.9 MPa, 25×2×2 mm=158.2 MPa; p<0.01). None of the interactions were significant. Within the limitations of this study, it can be concluded that factors such as specimen dimensions, storage medium and temperature significantly affect flexural strength results, which invalidates comparisons of results from studies that use different methodologies.
AB - This study evaluated the influence of specimen dimensions and storage medium and temperature on the flexural properties of one dental resin composite. The material utilized throughout the study was Clearfil AP-X. Eighty specimens were built with dimensions of either 10×2×2 mm or 25×2×2 mm, stored dry or in distilled water, at 25 or 37°C, for 24 h. Flexural strength and modulus were tested in three-point bending. Results were evaluated with three-way ANOVA and Tukey's test (α=0.05). Statistical significance was observed for all three factors: temperature (37°C=190.8 MPa, 25°C=165.3 MPa; p<0.01), storage medium (water=167.7 MPa, Dry=188.4 MPa; p<0.01) and specimen dimensions (10×2×2 mm=197.9 MPa, 25×2×2 mm=158.2 MPa; p<0.01). None of the interactions were significant. Within the limitations of this study, it can be concluded that factors such as specimen dimensions, storage medium and temperature significantly affect flexural strength results, which invalidates comparisons of results from studies that use different methodologies.
KW - Composite resins
KW - Dental materials
KW - Dentistry
KW - Flexural strength
UR - http://www.scopus.com/inward/record.url?scp=84875888098&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84875888098&partnerID=8YFLogxK
U2 - 10.4012/dmj.2012-271
DO - 10.4012/dmj.2012-271
M3 - Article
C2 - 23538757
AN - SCOPUS:84875888098
SN - 0287-4547
VL - 32
SP - 228
EP - 232
JO - Dental materials journal
JF - Dental materials journal
IS - 2
ER -