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KMID : 0358920130400030159
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Journal of the Korean Academy of Pedodontics
2013 Volume.40 No. 3 p.159 ~ p.167
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The Optimum Addition Ratio of Nano Hydroxyapatite to Glass Ionomer Dental Cement (Changes in Demineralization Resistance and Bonding Strength of Light Cured Glass Ionomer after the Addition of Nano Hydroxyapatite in Various Ratio)
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Kim Nam-Hyuk
Kim Seong-Oh
Song Je-Seon
Lee Jae-Ho
Son Heung-Kyu
Choi Byung-Jai
Choi Hyung-Jun
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Abstract
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The aim of this study was to evaluate changes in demineralization resistance and bonding strength of light cured glass ionomer after the addition of nano hydroxyapatite in various ratios. Fuji II LC GIC (GC Co., Japan) was used as the control group and also as a base material for experimental group. HA was mixed into the RMGIC at various ratio to create a HA-LC GIC mixture, preparing six experimental groups, i.e. 5%, 10%, 15%, 20%, 25%, 30% HA-LC GIC. According to the results, the bonding strength increased due to the addition of HA, showing the maximum value at the 15% nano HA group (p < 0.05). Under CLSM observation after 4 days of demineralization, the HA groups were more resistant to demineralization compared to the control group. No significant difference was observed between HA groups. In analysis through SEM, the HA groups showed attachment of granular materials and decreased demineralized tooth surfaces under influence of HA particles.
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KEYWORD
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Nano hydroxyapatite, Light-cured glass ionomer, Bonding strength, Demineralization resistance
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