Effects of Color Modifier on Degree of Monomer Conversion, Biaxial Flexural Strength, Surface Microhardness, and Water Sorption/Solubility of Resin Composites

Effects of Color Modifier on Degree of Monomer Conversion, Biaxial Flexural Strength, Surface Microhardness, and Water Sorption/Solubility of Resin Composites

Color modifiers can be mixed with resin composites to mimic the shade of severely discolored tooth. The aim of this study was to assess the effects of a color modifier on the physical and mechanical properties of a resin composite. The composite was mixed with a color modifier at 0 wt% (group 1), 1...

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Bibliographic Details
Published in:Polymers Vol. 13; no. 22; p. 3902
Main Authors: Saikaew, Pipop, Phimolthares, Patchara, Phitakthanaakul, Pheeratas, Sirikul, Panthira, Mekrakseree, Suwannee, Panpisut, Piyaphong
Format: Journal Article
Language:English
Published: Basel MDPI AG 11-11-2021
MDPI
Subjects:
biaxial flexural strength
Color
color modifier
Composite materials
Conversion
Correlation
Curing
degree of monomer conversion
Discoloration
Flexural strength
Light
Mechanical properties
Microhardness
Monomers
Physical properties
resin composite
Resins
Solubility
Sorption
surface microhardness
water sorption
United States > US
Japan
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Summary:Color modifiers can be mixed with resin composites to mimic the shade of severely discolored tooth. The aim of this study was to assess the effects of a color modifier on the physical and mechanical properties of a resin composite. The composite was mixed with a color modifier at 0 wt% (group 1), 1 wt% (group 2), 2.5 wt% (group 3), or 5 wt% (group 4). The degree of monomer conversion (DC) was examined after light curing for 20 or 40 s. Biaxial flexural strength (BFS)/modulus (BFM), surface microhardness (SH), and water sorption (Wsp)/solubility (Wsl) were also tested. The DC of group 1 was significantly higher than that of groups 3 and 4. The increase in curing time from 20 to 40 s increased the DC by ~10%. The BFS, BFM, Wsp, and Wsl of all the groups were comparable. A negative correlation was detected between the concentration of color modifier and the BFS and DC, while a positive correlation was observed with Wsp. In conclusion, the color modifier reduced the DC of composites, but the conversion was improved by extending the curing time. The increase in color modifier concentration also correlated with a reduction in strength and the increase in the water sorption of the composites.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym13223902