대한소아치과학회지 (Journal of the korean academy of Pediatric Dentistry)

  • 제43권2호
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  • Pages.137-144
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  • 2016
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  • 1226-8496(pISSN)
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  • 2288-3819(eISSN)
대한소아치과학회 (Korean Academy of Pediatric Dentistry)
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산성 환경이 Tricalcium Silicate 재료의 압출강도와 표면형태에 미치는 영향

Effect of Acidic Environment on the Push-Out Bond Strength and Surface Morphology of Tricalcium Silicate Materials

  • 박미선 (전남대학교 치의학전문대학원 소아치과학교실) ;
  • 김재환 (전남대학교 치의학전문대학원 소아치과학교실) ;
  • 최남기 (전남대학교 치의학전문대학원 소아치과학교실) ;
  • 김선미 (전남대학교 치의학전문대학원 소아치과학교실)
  • Park, Misun (Department of Pediatric Dentistry, College of Dentistry, Chonnam National University) ;
  • Kim, Jaehwan (Department of Pediatric Dentistry, College of Dentistry, Chonnam National University) ;
  • Choi, Namki (Department of Pediatric Dentistry, College of Dentistry, Chonnam National University) ;
  • Kim, Seonmi (Department of Pediatric Dentistry, College of Dentistry, Chonnam National University)
  • 투고 : 2015.07.22
  • 심사 : 2015.10.16
  • 발행 : 2016.05.31
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초록

이 연구의 목적은 다양한 산성 환경에서 규산 삼칼슘 재료인 Biodentine$^{(R)}$, Theracal$^{(R)}$, ProRoot MTA$^{(R)}$의 압출강도를 측정하고 표면형태를 관찰하는 것이었다. 각각의 재료에 대해 샘플을 4개의 그룹으로 나누었다. 산성 조건 그룹은 pH 4.4, 5.4, 6.4의 부티르산 조건에서, 대조군 그룹은 pH 7.4의 인산완충식염수 조건에서 4일간 $37^{\circ}C$에서 보관하였다. 이후 압출강도를 측정하고 표면 형태를 분석하였다. Biodentine$^{(R)}$과 Theracal$^{(R)}$은 모든 산성 조건에서 ProRoot MTA$^{(R)}$ 보다 더 높은 압출강도를 보였고 pH 감소에 따라 압출강도가 감소하였다. 주사전자현미경을 이용한 관찰 결과 재료들 모두 산성 조건에서 표면 형태에 상당한 변화를 보였다. 결론적으로, Biodentine$^{(R)}$과 Theracal$^{(R)}$은 ProRoot MTA$^{(R)}$와 비교하여 더 높은 압출강도를 보였다. 또한 산성 조건은 규산삼칼슘 재료들의 압출강도와 미세구조를 약화시킬 수 있다.

The aim of this study was to evaluate the effect of a range of acidic pH values on the push-out bond strength and surface morphology of tricalcium silicate materials: Biodentine$^{(R)}$, Theracal$^{(R)}$ and ProRoot MTA$^{(R)}$. The standardized lumens of root slices prepared from extracted single-root human teeth were filled with Biodentine$^{(R)}$, Theracal$^{(R)}$ and ProRoot MTA$^{(R)}$ according to manufacturer's instructions. The specimens were randomly divided into 4 groups (n = 20) for each material and then incubated for 4 days at $37^{\circ}C$; 3 acidic groups (butyric acid buffered at pH 4.4, 5.4, 6.4) and 1 control group (phosphate buffered saline solution at pH 7.4). The push-out bond strengths were then measured by using a universal testing machine and the surface morphology of each experimental group was analyzed by a scanning electron microscope. Biodentine$^{(R)}$ and Theracal$^{(R)}$ showed higher push-out bond strength compared with ProRoot MTA$^{(R)}$ after exposure to acidic pH values. A substantial change in the surface morphology of each material occurred after exposure to different pH values. In conclusion, the push-out bond strengths of Biodentine$^{(R)}$ and Theracal$^{(R)}$ are higher than the ProRoot MTA$^{(R)}$. Further the acidic environment weakens the push-out bond strength and microstructure of tricalcium silicate materials.

키워드

참고문헌

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