The Influence of Microwave Sintering Process on the Adaptation of CAD/CAM Zirconia Core

마이크로 웨이브 소결 과정이 CAD/CAM 지르코니아 코아의 적합도에 미치는 영향

  • Kim, Keun Bae (Department of prosthodontics, college of Dentistry, Yonsei University) ;
  • Kim, Jee Hwan (Department of prosthodontics, college of Dentistry, Yonsei University) ;
  • Lee, Keun-Woo (Department of prosthodontics, college of Dentistry, Yonsei University)
  • 김근배 (연세대학교 치과대학 치과보철학교실) ;
  • 김지환 (연세대학교 치과대학 치과보철학교실) ;
  • 이근우 (연세대학교 치과대학 치과보철학교실)
  • Received : 2009.04.05
  • Accepted : 2009.06.25
  • Published : 2009.06.30

Abstract

The purpose of this research was to examine the fitness of zirconia cores that were made by different sintering methods; generic electricity furnace and microwave furnace. Firstly, 12 cores for each group were made by using each different sintering process and attached them to a metal die with silicon. The internal and marginal gap of sintered zirconia was measured by using Skyscan 1076 micro-CT, then it was reorganized by CT-An software. To each samples, we extracted B-L image, M-D image of cutting side, and cross-sectional side of tooth long axis and calculated the mean value of marginal, axial, and occlusal gap each side. Results: 1. The mean marginal gap of sintered zirconia was $36.20{\mu}m$ for EVE, $47.67{\mu}m$ for LAV, $52.47{\mu}m$ for DEN, and $54.63{\mu}m$ for CER. 2. For the axial wall, the research showed the largest value of $63.49{\mu}m$ for EVE, but there were no statistical significance. 3. In related to the occlusal internal measurement, DEN showed the smallest value ($77.06{\mu}m$), EVE and CER showed significantly high value. From this study, it is suggested that CAD/CAM zirconia core which was made in the process of microwave sintering has clinically acceptable values in marginal and internal gap.

Acknowledgement

Supported by : 연세대학교

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