Does the Misfit Volume of Prosthetic Crowns Differ Before and After Ceramic Application? An In Vitro Radiographic Microtomography Analysis
| Autor: | Ricardo Tadeu Lopes, Thais Maria Pires dos Santos, Luis Carlos da Fontoura Frasca, Elken Gomes Rivaldo, Karin Astrid Seehaber |
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| Rok vydání: | 2019 |
| Předmět: |
Ceramics
Materials science X-ray microtomography Radiography Dental Materials 03 medical and health sciences 0302 clinical medicine Dental porcelain Cubic zirconia Ceramic Nichrome Crowns business.industry X-Ray Microtomography 030206 dentistry General Medicine Microcomputed tomography Dental Porcelain Dental Prosthesis Design Volume (thermodynamics) visual_art visual_art.visual_art_medium Zirconium Oral Surgery business Biomedical engineering |
| Zdroj: | The International Journal of Prosthodontics. 32:355-357 |
| ISSN: | 0893-2174 |
| Popis: | Purpose To estimate the misfit volume of zirconia vs metal-ceramic crowns. Materials and methods Five specimens were fabricated from zirconia and five from nichrome (metal-ceramic). Microcomputed tomography techniques were used to obtain volumetric reconstructions of misfit volume before and after ceramic application. Results The mean misfit volume for metal-ceramic crowns was 8.80 mm3, and for zirconia crowns was 6.76 mm3 (P = .003, 95% confidence interval [CI] 0.714 to 3.358). Misfit volume also did not differ significantly before and after ceramic application (metal-ceramic, P = .375, 95% CI 0.513 to 1.363; zirconia, P = .253, 95% CI 0.257 to 0.977). Conclusion Zirconia crowns had a smaller mean misfit volume than metal-ceramic crowns. The change in misfit volume after ceramic application was minimal and unlikely to be of clinical relevance. |
| Databáze: | OpenAIRE |
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