Accuracy of ceramic restorations made with two CAD/CAM systems
| Autor: | Hesham Katamish, Tamer A. Hamza, Stephen F. Rosenstiel, Tamer E. Shokry, Hesham A. Ezzat, Mohamed Mahmoud Khalil El-Hossary |
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| Rok vydání: | 2013 |
| Předmět: |
Engineering
Surface Properties Magnification Mechanical engineering CAD CEREC Lithium disilicate Humans Yttrium Ceramic Orthodontics Microscopy Crowns business.industry Significant difference Dental Marginal Adaptation Tooth Preparation Prosthodontic Stainless Steel Dental Porcelain Models Dental Dental Prosthesis Design visual_art visual_art.visual_art_medium Computer-Aided Design Zirconium Oral Surgery business |
| Zdroj: | The Journal of prosthetic dentistry. 109(2) |
| ISSN: | 1097-6841 |
| Popis: | Statement of problem Different types of CAD/CAM systems are currently available, but information regarding which system produces the best marginal fit is lacking. Purpose The purpose of this study was to evaluate the effect of 2 different CAD/CAM systems (Cerec inLab, Kavo Everest) on the marginal fit of 2 types of zirconia-based and lithium disilicate crowns. Material and methods Forty zirconia-based and lithium disilicate crowns, 20 each, were fabricated with the Cerec inLab and Everest CAD/CAM systems on a specially designed stainless steel die to ensure the standardization of specimen shape and dimensions. The vertical marginal fit for all tested crowns was evaluated by using a digital microscope at ×100 magnification, and the data were tabulated and statistically analyzed with 2-way ANOVA, followed by the Tukey honestly significant difference (HSD) test with a confidence level of .05 to determine the mean differences. Results The results showed that the CAD/CAM technique, ceramic type, and their interaction had a statistically significant effect on the mean marginal fit of both ceramic types tested. Conclusions Better marginal fit values were exhibited by the Everest CAD/CAM technique for both ceramic types tested. |
| Databáze: | OpenAIRE |
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