치위생과학회지 (Journal of dental hygiene science)

  • 제14권2호
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  • Pages.140-149
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  • 2014
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  • 1598-4478(pISSN)
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  • 2233-7679(eISSN)
한국치위생과학회 (The Korean Society of Dental Hygiene Science)
권호 표지

지르코니아 표면에칭처리와 저온열화현상이 지르코니아와 전장도재의 결합강도에 미치는 영향

Effects on Bond Strength between Zirconia and Porcelain according to Etching Treatment and Low Temperature Degradation

  • 박진영 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 김재홍 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 김웅철 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 김지환 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 김혜영 (고려대학교 일반대학원 보건과학과 치의기공전공)
  • Park, Jin-Young (Department of Health Science Specialized in Dental Laboratory Science and Engineering, Graduate School, Korea University) ;
  • Kim, Jae-Hong (Department of Health Science Specialized in Dental Laboratory Science and Engineering, Graduate School, Korea University) ;
  • Kim, Woong-Chul (Department of Health Science Specialized in Dental Laboratory Science and Engineering, Graduate School, Korea University) ;
  • Kim, Ji-Hwan (Department of Health Science Specialized in Dental Laboratory Science and Engineering, Graduate School, Korea University) ;
  • Kim, Hae-Young (Department of Health Science Specialized in Dental Laboratory Science and Engineering, Graduate School, Korea University)
  • 투고 : 2014.03.12
  • 심사 : 2014.05.12
  • 발행 : 2014.06.30
⟨ 이전 논문 다음 논문 ⟩

초록

본 연구에서는 지르코니아 에칭에 의한 표면변화가 지르코니아 코어와 도재 사이의 결합강도에 미치는 영향을 조사하기 위해 전단결합강도 실시하였고, 표면의 변화를 관찰하기 위한 SEM 측정, 에칭처리에 따른 지르코니아의 성분변화를 알아보기 위해 EDS 분석을 실시하였다. 그리고 구강상태에서 15~20년의 저온열화현상을 재현하기 위해 저온 열화 처리를 시행하여 전단결합강도 평가를 실시하여 다음과 같은 결과가 도출되었다. 1. 에칭처리를 시행하지 않은 시편과 에칭처리를 시행한 시편의 전단결합강도를 비교할 경우 에칭한 시편의 전단결합강도가 큰 것을 알 수 있다. 이는 에칭용액이 지르코니아코어 표면에 interlocking을 형성하여 기계적인 결합을 높여 주었을 것이라고 생각된다. 2. 전단결합강도의 결과(EZ>AEZ>NEZ>ANEZ)를 보았을 때 통계적으로는 유의한 차이를 보였으며, 저온열화처리를 하지 않고 에칭처리를 한 EZ군이 전단결합강도가 가장 큰 것을 알 수 있었다. 또한 파절 양상에서도 EZ군에서만 응집파절을 보여 가장 결합강도가 높다는 결과를 도출할 수 있다. 결론적으로 저온열화처리 여부에 관계없이 표면에칭처리를 한 시편의 전단결합강도가 큰 것으로 나타나 지르코니아 표면의 에칭처리로 인한 interlocking의 형성이 기계적인 결합을 향상시키는 요인이 되었다고 생각된다.

The purpose of this study was to investigate the influence of etching surface treatment and aging treatment of zirconia on the shear bond strength between zirconia core and veneered ceramic. Four groups of zirconia-ceramic specimens were prepared; 1) NEZ group (no etching zirconia), 2) EZ group (etching zirconia), 3) ANEZ group (aging and no etching zirconia), 4) AEZ group (aging and etching zirconia). The shear bond strength between zirconia and porcelain was measured using Instron Universal Testing Machine. Surface texture with crystalline structure of zirconia surface was examined by the field emission scanning electron microscopy (FE-SEM) with ingredient analysis. The fractured surfaces of specimens were examined to determine the failure pattern by a digital microscope. The mean${\pm}$standard deviation of shear bond strengths were $23.47{\pm}3.47$ Mpa in NEZ, $28.30{\pm}4.34$ Mpa in EZ, $21.85{\pm}4.65$ Mpa in ANEZ, $24.65{\pm}3.65$ Mpa in AEZ group, respectively, and were significantly different (p<0.05). The average shear bond strength was largest in EZ group, followed by AEZ, NEZ, and ANEZ groups. Most specimens in NEZ group showed adhesive failure and most specimens in EZ, AEZ, and ANEZ group showed mixed failure. Surface of etching treatment group (EZ and AEZ) showed complex micro-structure and irregular surface texture which may facilitate mechanical interlocking, while untreated zirconia surface presented simpler micro-structure. In conclusion, an etching treatment improved bonding strength between zirconia and porcelain by forming mechanical interlocking.

키워드

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