Journal of Technologic Dentistry (대한치과기공학회지)

Korean Academy of Dental Technology (대한치과기공학회)
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The effect of vent on the marginal discrepancy of the PFM base metal castings

Vent의 형성이 도재전장 비귀금속합금 주조체의 변연부 적합도에 미치는 영향

  • Kim, Tae-Suk (Dental Laboratory, Hospital, Korea University) ;
  • Lee, Sung-Uk (Dental Laboratory, Hospital, Korea University) ;
  • Oh, Sae-Yoon (Dept. of Dental Technology, College of Health Sciences, Korea University) ;
  • Kim, Woong-Chul (Dept. of Dental Technology, College of Health Sciences, Korea University) ;
  • Kim, Ji-Hwan (Dept. of Dental Technology, College of Health Sciences, Korea University) ;
  • Yoo, Jin-Ho (Dept. of Dental Technology, Masan College)
  • 김태석 (고려대학교 의료원 치과기공실) ;
  • 이성욱 (고려대학교 의료원 치과기공실) ;
  • 오세윤 (고려대학교 보건대학 치기공과) ;
  • 김웅철 (고려대학교 보건대학 치기공과) ;
  • 김지환 (고려대학교 보건대학 치기공과) ;
  • 유진호 (마산대학 치기공과)
  • Published : 2001.07.30
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Abstract

This study was performed to investigate the effect of vent on the marginal discrepancy of PFM base metal castings. Eighteen identical wax patterns of a maxillary 3 unit anterior bridge were fabricated. Nine cases out of them were vented with $\phi$2.5mm sprue wax, for direct comparison as to the marginal discrepancy of the castings with the other non vented 9 ones. The mean value of marginal discrepancies of the vented castings was $85.02{\pm}25.57{\mu}m$, and that of the non vented was $163.21{\pm}69.88{\mu}m$ respectively. Statistical analysis revealed that marginal discrepancy of the vented casting was significantly reduced(p<0.05).

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