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KMID : 0988720090250020095
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Journal of the Korean Academy of Stomatognathic Function and occlusion
2009 Volume.25 No. 2 p.95 ~ p.107
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The Influence of Microwave Sintering Process on the Adaptation of CAD/CAM Zirconia Core
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Kim Geun-Bae
Lee Keun-Woo
Kim Jee-Hwan
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Abstract
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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 36.20μm for EVE, 47.67μm for LAV, 52.47μm for DEN, and 54.63μm for CER. 2. For the axial wall, the research showed the largest value of 63.49um for EVE, but there were no statistical significance. 3. In related to the occlusal internal measurement, DEN showed the smallest value (77.06um), 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.
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KEYWORD
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microwave sintering, CAD/CAM, zirconia, marginal and internal fit, micro-CT
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