The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)
- Volume 39 Issue 3
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- Pages.243-249
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- 2001
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- 0301-2875(pISSN)
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- 2005-3789(eISSN)
Evaluation of marginal fidelity of copy-milled and CAD/CAM all ceramic crowns
- Jeong Seung-Mi (Department of Prosthodontics, School of Dentistry, Chosun University) ;
- Kang Dong-Wan (Department of Prosthodontics, School of Dentistry, Chosun University) ;
- Wolf Christoph (Department of Prosthodontics, School of Dentistry, Georg-August University)
- Published : 2001.06.01
Abstract
Statement of the problem. The interest in all-ceramic restorations has increased as more techniques have become available. With the introduction of machinable dental ceramics and CAD/CAM systems or Copy-milling systems there is a need for evaluating the quality levels of these new fabrication techniques. Purpose. This study was to evaluate the fitting accuracy of machined all-ceramic crowns made out of an industrially prefabricated feldspathic porcelain. Material and Methods. Three master models with different cutting depth (0.8mm/1.0mm/1.2mm)were produced using a palladium-silver alloy. A total of 36 working dies, 12 of each form, was used for the modellation of prototype resin copings and 36 additional crowns, 12 of each cutting depth, were produced by using the