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The effect of hydroxyapatite on bonding strength in light curing glass ionomer dental cement

 M.H. Chae  ;  Yong Keun Lee  ;  Kyoung Nam Kim  ;  Jae Hoon Lee  ;  B.J. Choi  ;  H.J. Choi  ;  K.T. Park 
 Key Engineering Materials, Vol.309~311 : 881-884, 2006 
Journal Title
 Key Engineering Materials 
Issue Date
Bonding Strength ; Bone Like Apatite ; Hydroxyapatite (HAP) ; Light Curing Glass Ionomer Cement
The mineral phase of bone and teeth is mainly hydroxyapatite. Currently there are numerous researches being conducted on the effect of the addition of hydroxyapatite to dental materials. Among them, several studied were published stating that the addition of hydroxyapatite to composite resin or glass ionomer cement resulted in an improvement in bonding strength and physical properties Therefore, this study will investigate the effect that the addition of hydroxyapatite to light curing glass ionomer cement has on bonding strength. Two different light curing glass ionomer cement products were selected (FujiⅡLC, GC Cor, Japan and Vitremer™ , 3M/ESPE, USA) and hydroxyapatite was mixed into the light curing glass ionomer cement at various concentrations to create hydroxyapatite-light curing glass ionomer cement mixture. In order to confirm that hydroxyapatite-light curing glass ionomer cement met the basic requirements of dental materials, sensitivity to ambient light, depth of cure, and flexural strength were tested. From the results of the above mentioned tests, the hydroxyapatite-light curing glass ionomer cement with the most superior physical properties for each product (15% HA-Fuji Ⅱ LC, 20% HA-Vitremer™)was bonded to the teeth and then immersed in artificial saliva(36.5°C) for four weeks. Finally the sectioned surface was observed under SEM after measuring the bonding strength. As the hydroxyapatite concentration increased, the depth of cure decreased. However flexural strength increased and there was not much change in the sensitivity to ambient light. Bonding strength, which was the main focus of this study, increased with the addition of hydroxyapatie and scanning electron microscope findings show a more cohesive type of fracture in the material with bone like apatite material formation along the tooth-material interface.
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2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Pediatric Dentistry (소아치과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Kyoung Nam(김경남)
Lee, Yong Keun(이용근)
Lee, Jae Ho(이제호) ORCID logo https://orcid.org/0000-0002-1556-3485
Choi, Byung Jai(최병재)
Choi, Hyung Jun(최형준) ORCID logo https://orcid.org/0000-0002-3315-6912
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