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Evaluation of the marginal and internal fit of lithium disilicate crowns fabricated by different scanning methods

다른 스캐닝 방법으로 제작된 리튬 디실리케이트 단관의 변연 및 내면 적합도 평가

  • Kim, Jae-Hong (Department of Dental Lab. Science & Engineering, College of Health Science, Graduate School, Korea University) ;
  • Kim, Woong-Chul (Department of Dental Lab. Science & Engineering, College of Health Science, Graduate School, Korea University) ;
  • Kim, Ji-Hwan (Department of Dental Lab. Science & Engineering, College of Health Science, Graduate School, Korea University)
  • 김재홍 (고려대학교 일반대학원 보건과학과 치의기공과) ;
  • 김웅철 (고려대학교 일반대학원 보건과학과 치의기공과) ;
  • 김지환 (고려대학교 일반대학원 보건과학과 치의기공과)
  • Received : 2014.04.28
  • Accepted : 2014.06.26
  • Published : 2014.06.30

Abstract

Purpose: This study was to compare adaptations of lithium disilicate CAD/CAM crowns fabricated with different scanning systems. Methods: This study selected the mandibular right first molar as an abutment for experiments and produced 10 working models. Lithium disilicate crowns appropriate for each abutment were produced by using a CEREC$^{(R)}$ CAD/CAM system. The independent t-test was then used to compare and analyze the data obtained from the two groups(${\alpha}$=0.05). Results: Mean(SD) adaptation were $86.93(22.82){\mu}m$ for the InS group, $88.42(26.77){\mu}m$ for the ExS group. They were no statistically significant differences between groups for adaptation(p>0.05). Conclusion: Within the limitations of this study, the results suggest that the accuracy of all investigated optical scanner were satisfactory for clinical use. Further assessment and improvement of the lithium disilicate ceramic for the fabrication of FPDs is evidently still required.

Keywords

All ceramic restoration;Optical scanner;Marginal and internal fit;Silicone replica technique

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