The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Comparison of shearbond strength between metal and indirect resin according to the different conditionings

표면처리에 따른 금속과 간접복합레진간의 전단결합강도 비교연구

  • Choi, Su-Young (Department of Prosthodontics, Yonsei University College of Denistry) ;
  • Choi, Hyunmin (Department of Prosthodontics, Yonsei University College of Denistry) ;
  • Moon, Hong-Seok (Department of Prosthodontics, Yonsei University College of Denistry) ;
  • Shim, June-Sung (Department of Prosthodontics, Yonsei University College of Denistry) ;
  • Park, Young-Bum (Department of Prosthodontics, Yonsei University College of Denistry) ;
  • Lee, Geun-Woo (Department of Prosthodontics, Yonsei University College of Denistry)
  • 최수영 (연세대학교 치과대학 보철학교실) ;
  • 최현민 (연세대학교 치과대학 보철학교실) ;
  • 문홍석 (연세대학교 치과대학 보철학교실) ;
  • 심준성 (연세대학교 치과대학 보철학교실) ;
  • 박영범 (연세대학교 치과대학 보철학교실) ;
  • 이근우 (연세대학교 치과대학 보철학교실)
  • Received : 2017.02.20
  • Accepted : 2017.06.19
  • Published : 2017.07.31
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Abstract

Purpose: The purpose of this study is to investigate the differences in bond strength of four different indirect composites to the gold alloy and Ni-Cr alloy according to type of metal surface treatment after water storage. Materials and methods: Type IV gold alloy and Ni-Cr alloy were used for casting alloy while four types of indirect composite resins (Gradia, Tescera Sinfony and in;joy) were used in this study. Metal specimens were produced by casting and total of 240 specimens (60 specimens per one indirect composite group) were prepared. After bonding indirect composite resin and undergoing 24 hours of polymerization, customized jig was attached to the metal specimen and shear bond strength were measured using universal testing machine. Also, differences in shear bond strength before and after water storage for 240 hours were also measured. Results: In the measurement of shear bond strength according to the metal surface treatments, bead group showed high strength followed by loop and flatting group (P<.05). After being stored in water bath for 240 hours, Gradia showed statistically significant high bond strength compared to other indirect composite resins in all groups (P<.05). Conclusion: Shearbond strength was found to be different according to type of metal surface treatment and type of metal used after storage in water. Further studies need to be developed for clinical practices as three are still problems of microleakage, stain or wear.

목적: 본 연구에서는 4종의 간접복합레진에 대하여 금합금과 Ni-Cr합금에 대한 결합강도의 차이와 각각의 합금에 표면형태를 다르게 하여 일정한 온도의 증류수에 보관 전과 후에 전단결합강도의 차이가 있는지 알아보고자 하였다. 재료 및 방법: 금속 시편을 주조 제작하였는데, 금합금과 Ni-Cr합금의 표면형태를 flatting, bead, loop로 하여 4종의 간접복합레진(Gradia, Tescera Sinfony and in;joy)당 60개씩 총 240개를 준비하였다. 이후 금속표면에 각각의 제조사에서 지시한대로 간접 복합레진을 접착하였다. 간접복합레진의 중합 24시간 후에 만능시험기를 이용하여 전용 지그에 금속시편을 부착 후, 전단결합강도를 측정하였다. 또한 증류수에 240시간 보관 후에 같은 방법으로 전단결합강도를 측정하였다. 결과: 금속의 표면 형태에 따른 전단결합강도 측정에서 4종의 레진 모두 bead군에서 높은 결합강도를 보였고 loop, flatting 순이었다 (P < .05). 수조에서 240시간 보관 후에는 Gradia가 모든 군에서 다른 레진 군에 비해 비슷하거나, 통계적으로 유의하게 높은 (P < .05) 전단결합강도를 나타내었다. 결론: 금속표면의 형태에 따라, 금속의 종류에 따라, 물속 보관 전후에 따라 금속과 간접복합레진의 결합력의 차이를 나타내었고 추가 실험을 통해 최적의 조합에 따른 임상에서의 적용가능성을 보여주었다.

Keywords

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