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http://dx.doi.org/10.5762/KAIS.2017.18.10.448

The Study on Marginal discrepancy of Manufactured Coping Crown according to Production method and materials by using CAD/CAM System  

Lee, Hee-Sung (Department of Dental Science, Graduate School, Kyungpook National University)
Shin, Seong-Hun (Daesung Industrial Co., Ltd.)
Song, Joon-Ki (Department of Prosthodontics, Graduate School, Dankook University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.10, 2017 , pp. 448-453 More about this Journal
Abstract
The purpose of this study was to compare the marginal discrepancy of coping crowns according to manufacturing method and materials by using the CAD/CAM system to compare the optimum manufacturing method and materials. The coping crowns were fabricated by using manufacturing methods and materials, and marginal fit was measured using the replica technique. For comparative analysis of manufacturing methods and materials, analysis of variance was performed. One-way ANOVA was performed to compare and analyze different mean values. For the milling method of the alloy, 114.6 was obtained for the MM group, 111.4 for the MS group, 67.2 for the MSC group, and 50.9 for the MSS group, respectively, using the milling/sintering method. In the milling/sintering method of ceramic, 35.6 and 36.3, respectively, were obtained for the SLME group and SLMR group, respectively. However,there was a significant difference according to the material. The milling/sintering method of the ceramic material gave the lowest value, and it was verified by the optimal method. However, marginal discrepancy of coping crowns fabricated using the CAD/CAM system is applicable to the clinic since it corresponds to acceptable numerical values in clinical practice.
Keywords
CAD/CAM; Coping crown; Co-Cr; Zirconia; Marginal discrepancy;
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