دورية أكاديمية
Computable translucency as a function of thickness in a multi-layered zirconia.
| العنوان: | Computable translucency as a function of thickness in a multi-layered zirconia. |
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| المؤلفون: | Erdelt K; Scientific Engineer, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany., Pinheiro Dias Engler ML; Guest Researcher, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany., Beuer F; Head and Chair, Department of Prosthetic Dentistry, Charité, Berlin, Germany., Güth JF; Associate Professor, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany., Liebermann A; Assistant Professor, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany. Electronic address: Anja.Liebermann@med.uni-muenchen.de., Schweiger J; CDT, Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany. |
| المصدر: | The Journal of prosthetic dentistry [J Prosthet Dent] 2019 Apr; Vol. 121 (4), pp. 683-689. Date of Electronic Publication: 2018 Dec 04. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Mosby-Year Book Country of Publication: United States NLM ID: 0376364 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1097-6841 (Electronic) Linking ISSN: 00223913 NLM ISO Abbreviation: J Prosthet Dent Subsets: MEDLINE |
| أسماء مطبوعة: | Publication: St. Louis Mo : Mosby-Year Book Original Publication: St. Louis, Mosby. |
| مواضيع طبية MeSH: | Dental Materials* , Esthetics, Dental*, Ceramics ; Dental Porcelain ; Materials Testing ; Surface Properties ; Zirconium |
| مستخلص: | Statement of Problem: Determining the relationship between variable thicknesses and the translucency of dental ceramics is essential for optimizing esthetics in different clinical situations. Purpose: The purpose of this in vitro study was to analyze the relationship between layer thickness and translucency of 2 multi-layered monolithic zirconia materials and to develop an equation by which the grade of translucency can be calculated dependent on the materials' layer thicknesses in advance. Material and Methods: Two semisintered multi-layered zirconia blanks, namely KATANA Zirconia Super Translucent Multi-Layered Disk (Noritake Dental Supply Co, Ltd) and Zirconia Ultra Translucent Multi-Layered Disk (UTML) (Noritake Dental Supply Co, Ltd), were sectioned (N=96) to separate the 4 layers (n=12 per layer): enamel layer, transition layer 1, transition layer 2, body layer. All specimens were sintered in a furnace (M2 Plus; Thermo-Star) at 1500°C for 2 hours and automatically polished under water cooling up to P2400 for the thicknesses of 1.6, 1.3, 1.0, 0.7, and 0.4 mm. Transmittance of visible light was measured using a spectrophotometer (Lambda 35; Perkin Elmer). Data were analyzed using the Kolmogorov-Smirnov, 2-way ANOVA, and Scheffé post hoc tests (α=.01) and curve fitting. Results: Analyzing the fitting of the values of the 8 material groups to the linear, exponential, and logarithmic curves, 7 of the 8 groups (not UTML body layer) fitted the most (R-square value closer to 1.0) to the logarithmic curve. Constants were obtained from the distance to the x-axis and the curvature. Conclusions: The methodology of this study provided the materials' specific constants a and b by analyzing the translucency behavior of KATANA Super Translucent Multi-Layered Disk and Ultra Translucent Multi-Layered Disk in different thicknesses, allowing further translucency calculation by applying the developed formula and the constants. (Copyright © 2018 Editorial Council for the Journal of Prosthetic Dentistry. Published by Elsevier Inc. All rights reserved.) |
| المشرفين على المادة: | 0 (Dental Materials) 12001-21-7 (Dental Porcelain) C6V6S92N3C (Zirconium) S38N85C5G0 (zirconium oxide) |
| تواريخ الأحداث: | Date Created: 20181212 Date Completed: 20191126 Latest Revision: 20191126 |
| رمز التحديث: | 20231215 |
| DOI: | 10.1016/j.prosdent.2018.08.013 |
| PMID: | 30527568 |
| قاعدة البيانات: | MEDLINE |
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Full Text Finder | تدمد: | 1097-6841 |
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| DOI: | 10.1016/j.prosdent.2018.08.013 |