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Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys | ||
| Journal of Dentistry | ||
| مقاله 4، دوره 22، شماره 1 - شماره پیاپی 70، خرداد 2021، صفحه 21-26 اصل مقاله (730.32 K) | ||
| نوع مقاله: Original Article | ||
| شناسه دیجیتال (DOI): 10.30476/dentjods.2020.84347.1076 | ||
| نویسندگان | ||
| Zahra Mohammadi1؛ Meysam Mahabadi* 2؛ Gholamreza Tabbakhian2؛ Mahmud Talaakoob3 | ||
| 1Postgraduate Student, Dept. of Prosthetic Dentistry, Faculty of Dentistry, Isfahan Islamic Azad University, Khorasgan Branch, Isfahan, Iran. | ||
| 2Dept. of Prosthetic Dentistry, Faculty of Dentistry, Isfahan Islamic Azad University, Khorasgan Branch, Isfahan, Iran. | ||
| 3Dental Technician, Faculty of Dentistry, Isfahan Islamic Azad University, Khorasgan Branch, Isfahan, Iran. | ||
| چکیده | ||
| Statement of the Problem: Success of metal-ceramic restorations depends on the bond strength between porcelain and alloy. These restorations can be fabricated through different casting and computer-aided design/compute-aided manufacturing (CAD-CAM) techniques. Purpose: This study aimed to compare the bond strength of porcelain to milled sintered (Sintron) and casting (Co-Cr and Ni-Cr) base metal alloys. Materials and Method: In this in-vitro experimental study, 63 rectangular bars (25×3×0.5 mm) were fabricated of three base metal alloys: casting Ni-Cr, casting Co-Cr, and milled sintered Co-Cr alloy. Feldspathic porcelain (3×8 mm) was applied at the center of each bar with 1.5 mm thickness. The specimens were thermally aged. Bond strength was evaluated through three-point flexural test. Failure mode was evaluated by optical and electron microscope. Data were analyzed with one-way ANOVA and Tukey's post hoc test (α=0.05). Results: The mean flexural bond strength of porcelain to milled sintered Co-Cr alloy (24.58±5.16 MPa) was significantly higher than that of casting Ni-Cr (21.13±6.34 MPa) (p = 0.03) and casting Co-Cr (20.98±4.84 MPa) alloys (p = 0.04). However, the two casting alloys were not significantly different in this regard (p = 0.93). Failure mode in all specimens was of cohesive type. Conclusion: Bond strength of CAD-CAM milled sintered Co-Cr alloy was better than that of the conventional casting alloys and can serve as a suitable alternative to those alloys. | ||
| کلیدواژه‌ها | ||
| Bond strength؛ CAD-CAM؛ Casting؛ Metal-ceramic؛ Milled sintered alloy | ||
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| مراجع | ||
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