대한치과보철학회지 (The Journal of Korean Academy of Prosthodontics)

  • 제49권1호
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  • Pages.8-15
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  • 2011
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  • 0301-2875(pISSN)
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  • 2005-3789(eISSN)
대한치과보철학회 (The Korean Academy of Prosthodonitics)
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금속의치상과 의치이장재료 간의 결합력에 관한 연구

A study on the shear bond strength between Co-Cr denture base and relining materials

  • 이나영 (한양대학교 의과대학 치과학교실) ;
  • 김두용 (한양대학교 의과대학 치과학교실) ;
  • 이영수 (한양대학교 의과대학 치과학교실) ;
  • 박원희 (한양대학교 의과대학 치과학교실)
  • Lee, Na-Young (Department of Dentistry, College of Medicine, Hanyang University) ;
  • Kim, Doo-Yong (Department of Dentistry, College of Medicine, Hanyang University) ;
  • Lee, Young-Soo (Department of Dentistry, College of Medicine, Hanyang University) ;
  • Park, Won-Hee (Department of Dentistry, College of Medicine, Hanyang University)
  • 투고 : 2010.09.08
  • 심사 : 2010.10.11
  • 발행 : 2011.01.31
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초록

연구 목적: 본 연구의 목적은 금속 의치상 재료에 직접법으로 이장을 시행했을 때 표면처리와 시간에 따른 결합강도의 변화를 비교하는 것이다. 연구 재료 및 방법: Co-Cr 시편을 최대직경 9 mm의 육각기둥 형태로 절삭하여 제작하였으며, $110\;{\mu}m$의 $Al_2O_3$로 1분간 sandblasting 하였다. 시편을 18개씩 3군으로 나누어 A군은 화학적 처리 없이, B, C군은 금속표면처리제 (MR $bond^{(R)}$, Alloy $primer^{(R)}$)를 도포한 후 7 mm직경의 자가 중합형 이장용 레진 (Vertex $SC^{(R)}$) 기둥을 부착하였다. 각각의 그룹을 다시3군으로 나누어 수분 하에서 다른 기간 (0주, 1주, 2주)동안 저장한 다음 만능역학 실험기계 (Instron)를 이용하여 시편을 분리하였고, 분리되는 시점의 전단결합강도를 측정하였다. 통계처리는 two-way ANOVA와 Tukey 방법을 이용하여 5% 유의수준에서 분석하였다. 결과: 시편을 sandblasting한 실험에서는, 1분 동안 sandblasting 한 시편의 표면 거칠기가 가장 크게 나타났다. 전단결합강도 실험에서 결합강도는 B, C, A군의 순서로 낮아졌으며, 이 세 군 사이에 유의성 있는 차이를 보였다. 기간별로 봤을 때 결합강도는 수분에 저장하지 않은 군에서 가장 높았으며 2주 동안 수분에 저장한 군에서 가장 낮았으나 기간별로 유의성 있는 차이는 보이지 않았다. 기간과 군을 함께 고려했을 때 모든 군에서 침수 시간이 길어짐에 따라 결합강도가 낮아졌으나B군과C군에서 임상적인 유의성은 보이지 않았고, A군에서만 유의성 있게 결합강도가 낮아졌다. 결론:Co-Cr 금속 의치상에 진료실에서 직접법으로 이장을 할 경우 적절한 기계적 처리 (Sandblasting) 후 금속 표면 처리제를 도포하는 것이 유리할 것으로 사료된다.

Purpose: This study evaluated the bonding strength of direct relining resin to Co-Cr denture base material according to surface treatment and immersion time. Materials and methods: In this study, Co-Cr alloy was used in hexagon shape. Each specimen was cut in flat surface, and sandblasted with $110\;{\mu}m$ $Al_2O_3$ for 1 minute. 54 specimens were divided into 3 groups; group A-control group, group B-applied with surface primer A, group C-applied with surface primer B. Self curing direct resin was used for this study. Each group was subdivided into another 3 groups according to the immersion time. After the wetting storage, shear bond strength of the specimens were measured with universal testing machine. The data were analyzed using two-way analysis of variance and Tukey post hoc method. Results: In experiment of sandblasting specimens, surface roughness of the alloy was the highest after 1 minute sandblasting. In experiment of testing shear bond strength, bonding strength was lowered on group B, C, A. There were significant differences between 3 groups. According to period, Bonding strength was the highest on 0 week storage group, and the weakest on 2 week storage group. But there were no significant differences between 3 periods. According to group and period, bonding strength of all group were lowered according to immersion time but there were no significant differences on group B and group C, but there was significant difference according to immersion time on group A. Conclusion: It is useful to sandblast and adopt metal primers when relining Co-Cr metal base dentures in chair-side.

키워드

참고문헌

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피인용 문헌

  1. Effect of metal primers and tarnish treatment on bonding between dental alloys and veneer resin vol.7, pp.5, 2015, https://doi.org/10.4047/jap.2015.7.5.392