| 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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Nam Hyuk Kim, Seong Oh Kim, Je Seon Song, Jae Ho Lee, Heung Kyu Son, Byung Jai Choi, Hyung Jun Choi |
| Department of Pediatric Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University |
| 글래스아이오노머에 대한 나노 하이드록시아파타이트의 최적 첨가 비율(나노 하이드록시아파타이트의 첨가 비율에 따른광중합형 글래스아이오노머의 결합강도와 탈회저항성의 변화 비교 |
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김남혁, 김성오, 송제선, 이제호, 손흥규, 최병재, 최형준 |
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연세대학교 치과대학 소아치과학교실, 구강과학연구소 |
Correspondence:
Hyung Jun Choi, Tel: +82-2-2228-3175, Fax: +82-2-392-7420, Email: choihj88@yuhs.ac
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Received: 12 September 2012 • Accepted: 11 June 2013 |
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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. |
| Key Words:
Nano hydroxyapatite, Light-cured glass ionomer, Bonding strength, Demineralization resistance |
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