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KMID : 1035320190460020053
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Korean Society for Dental Materials
2019 Volume.46 No. 2 p.53 ~ p.60
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Effect of pH variation on flexural and compressive properties of composite resins
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Jung Sang-Bong
Moon Keun
Seol Hyo-Joung
Kang Jung-Sook
Kwon Yong-Hoon
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Abstract
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The pH of the oral cavity can dynamically change due to diverse foods and beverages served. The purpose of the presentstudy was to evaluate flexural and compressive properties of composite resins after immersion in solutions of different pHs. Four composite resins were cured and immersed in test solutions of different pHs (3, 7.1, and 9) for 2 weeks. Flexural andcompressive properties (strength and modulus) were evaluated using universal test machine. After immersion, initial flexuraland compressive strength significantly changed to 1.5-30.0% and 0.3-19.6%, respectively; flexural and compressive modulussignificantly changed to 4.4-29.0% and 3.5-21.5%, respectively. However, the values obtained from solutions of different pHswere not significantly and consistently different to each other.
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KEYWORD
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Composite resin, pH, Flexural property, Compressive property
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