دورية أكاديمية
Linear dimensional change, compressive strength and detail reproduction in type IV dental stone dried at room temperature and in a microwave oven
| العنوان: | Linear dimensional change, compressive strength and detail reproduction in type IV dental stone dried at room temperature and in a microwave oven |
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| المؤلفون: | Marcos Aurélio Bomfim da Silva, Rafael Pino Vitti, Simonides Consani, Mário Alexandre Coelho Sinhoreti, Marcelo Ferraz Mesquita, Rafael Leonardo Xediek Consani |
| المصدر: | Journal of Applied Oral Science, Vol 20, Iss 5, Pp 588-593 (2012) |
| بيانات النشر: | University of São Paulo, 2012. |
| سنة النشر: | 2012 |
| المجموعة: | LCC:Dentistry |
| مصطلحات موضوعية: | Dental models, Compressive strength, Dental materials, Calcium sulfate, Heating, Dentistry, RK1-715 |
| الوصف: | The type IV dental stone is widely used for the fabrication of dyes and master casts for fixed and removable partial prostheses. It is typically normal to wait at least 24 hours for the casts to dry prior to beginning the laboratory procedures. The waiting time has been shown to be greatly reduced by using microwave drying. OBJECTIVE: This study evaluated the influence of drying techniques at room temperature and microwave oven on the linear dimensional change, compressive strength and detail reproduction in type IV dental stones. MATERIAL AND METHODS: Three type IV dental stone brands were selected; elite Rock, Shera Premium and Durone IV. Two different drying protocols were tested in 4 groups (n=10); G1 - room temperature (25±4ºC) dried for 2 hours; G2 - room temperature dried for 24 hours; G3 - room temperature dried for 7 days and G4 - microwave oven dried at 800 W for 5 minutes and after 2 hours at room temperature. After drying, the samples were assayed for dimensional charges. The sample surface was submitted to the ImageTool 3.0 software for compressive strength in a universal testing machine with a cell load of 50 KN at a crosshead speed of 0.5 mm/minutes and the detail reproduction was analyzed with a stereomicroscope at 25x magnification. The statistical analysis of the linear dimensional change and compressive strength data were conducted by the ANOVA test followed by the Tukey test (p |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1678-7757 1678-7765 |
| Relation: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572012000500016; https://doaj.org/toc/1678-7757; https://doaj.org/toc/1678-7765 |
| DOI: | 10.1590/S1678-77572012000500016 |
| URL الوصول: | https://doaj.org/article/c48657ecc6764db08028ce36b8007c71 |
| رقم الأكسشن: | edsdoj.48657ecc6764db08028ce36b8007c71 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16787757 16787765 |
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| DOI: | 10.1590/S1678-77572012000500016 |