대한소아치과학회지 (Journal of the korean academy of Pediatric Dentistry)

  • 제37권1호
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  • Pages.24-34
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  • 2010
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  • 1226-8496(pISSN)
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  • 2288-3819(eISSN)
대한소아치과학회 (Korean Academy of Pediatric Dentistry)
권호 표지

광중합형 글라스아이오노머 시멘트의 탈회 저항성과 결합 강도에 대한 나노미터 입자의 하이드록시아파타이트의 효과

THE EFFECTS OF NANO-SIZED HYDROXYAPATITE ON DEMINERALIZATION RESISTANCE AND BONDING STRENGTH IN LIGHT-CURED GLASS IONOMER DENTAL CEMENT

  • 김지희 (연세대학교 치과대학 소아치과학교실) ;
  • 이용근 (연세대학교 치과대학 치과생체재료공학교실) ;
  • 김성오 (연세대학교 치과대학 소아치과학교실 및 구강과학연구소) ;
  • 송제선 (연세대학교 치과대학 소아치과학교실 및 구강과학연구소) ;
  • 최병재 (연세대학교 치과대학 소아치과학교실 및 구강과학연구소) ;
  • 최형준 (연세대학교 치과대학 소아치과학교실 및 구강과학연구소)
  • Kim, Ji-Hee (Department of pediatric Dentistry, College of Dentistry, Yonsei University) ;
  • Lee, Yong-Keun (Department of Dental materials & bioengineering, College of Dentistry, Yonsei University) ;
  • Kim, Seong-Oh (Department of pediatric Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University) ;
  • Song, Je-Seon (Department of pediatric Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University) ;
  • Choi, Byung-Jai (Department of pediatric Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University) ;
  • Choi, Hyung-Jun (Department of pediatric Dentistry and Oral Science Research Center, College of Dentistry, Yonsei University)
  • 발행 : 2010.02.26
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초록

본 연구의 목적은 광중합형 글라스아이오노머 시멘트에 마이크로 입자의 하이드록시아파타이트와 나노미터 입자의 하이드록시아파타이트를 첨가하였을 때 물리적 성질과 탈회 저항, 결합 강도의 차이를 비교하기 위함이다. 실험에 사용된 광중합형 글라스아이오노머 시멘트는 Fuji II LC 였고 순수한 Fuji II LC GIC는 대조군으로, 15% micro HA- Fuji II LC GIC는 실험군 1, 15% nano HA- Fuji II LC GIC는 실험군 2로 설정한 후 실험을 진행하였고 다음과 같은 결론을 얻었다. 1. CLSM으로 탈회 표면 깊이를 관찰한 결과 대조군 보다 실험군에서 법랑질의 탈회가 덜 발생하였고, 실험군 1 보다 실험군 2에서 법랑질의 탈회가 적게 관찰되었다. 2. SEM을 이용한 탈회면 관찰시 대조군에서 법랑질의 탈회가 더 많이 일어났고, 실험군은 하이드록시아파타이트의 영향으로 탈회가 덜 일어나 표면입자가 보다 규칙적이었다. 두 실험군을 비교했을 때 실험군 2가 실험군 1 보다 탈회에 저항하였다. 3. 결합 강도는 대조군, 실험군 1, 실험군 2 순으로 증가했으며 세 군간에 통계학적으로 유의할 만한 차이가 있었다 (p < 0.05). 4. SEM 상에서 결합 강도 측정 후 파절된 면을 관찰한 결과 하이드록시아파타이트를 포함하는 실험군에서 골 유사 아파 타이트 추정 입자가 관찰되었으며 실험군 1 보다 실험군 2에서 더 많은 입자가 형성되었다.

The aim of this study was to evaluate the effect of incorporated nano HA on the demineralization resistance and bonding strength of LC GIC in comparison with micro HA. Fuji II LC GIC was used as the control group and a base material for experimental groups. Two experimental groups were prepared. One was prepared by adding 15% micro HA to LC GIC by weight ratio (Exp. 1), and the other was prepared by adding 15% nano HA instead (Exp. 2). According to the results, the following conclusions could be obtained. 1. Observing under the CLSM, the control group showed thicker enamel demineralization layer than in the experimental groups, and the Exp. 2 group showed the thinnest demineralization layer. 2. In SEM analysis, there was greater enamel demineralization in the control group. The Exp. 2 group was more resistant to demineralization compared to the Exp. 1 group. 3. The bonding strength was found to be in the increasing order of control, Exp. 1, and Exp. 2 group (p < 0.05). 4. Observing the fractured surfaces under SEM after the bonding strength test was performed, there were bone-like apatite particles formed in HA-added experimental groups, and a greater number of bone-like apatite particles were formed in the Exp. 2 group compared to the Exp. 1 group.

키워드

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