Journal of Korean society of Dental Hygiene (한국치위생학회지)

Korean Society of Dental Hygiene (한국치위생학회)
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Evaluation of fitness of metal-ceramic crown fabricated by cobalt-chrome alloy

코발트-크롬 합금으로 제작된 금속-도재관의 적합도 평가

  • Kim, Jae-Hong (Department of health science specialized in Dental Lab. Science & Engineering, Graduate school, Korea University) ;
  • Kim, Won-Soo (Department of Dental Laboratory Technology, Daejeon Health College) ;
  • Kim, Ki-Baek (Department of health science specialized in Dental Lab. Science & Engineering, Graduate school, Korea University)
  • 김재홍 (고려대학교 일반대학원 보건과학과 치의기공전공) ;
  • 김원수 (대전보건대학 치기공학과) ;
  • 김기백 (고려대학교 일반대학원 보건과학과 치의기공전공)
  • Received : 2012.10.15
  • Accepted : 2013.04.09
  • Published : 2013.04.30
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Abstract

Objectives : The purpose of this in vitro study was to evaluate the effect of firing cycles on the marginal and internal fit of metal ceramic crown. Methods : Ten same cases of stone models (abutment teeth 11) were manufactured. Ten cobalt-chrome cores were made per each models and the marginal and internal fit was evaluated through a silicone replica technique. The marginal and internal fit of specimens was measured twice. The first measurement was done after manufacturing cobalt-chrome alloy core and the second measurement was done after porcelain firing. T-test of paired sample for statistical analysis was executed with SPSS 12.0K for Windows (${\alpha}$=0.05). Results : Mean(SD) marginal and internal fit were 77.1(23.3) ${\mu}m$ for the cobalt-chrome alloy core group and 84.4(21.9) ${\mu}m$ for the metal-ceramic crown group. They were statistically significant differences between groups for marginal and internal fit (p<.05). Conclusions : All metal ceramic crowns showed marginal and internal fit ranged within the current clinical recommendations.

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References

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