Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys
Statement of the Problem: The 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/computer-aided manufacturing (CAD/CAM) techniques. Purpose: This study aimed to com...
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| Format: | Article |
| Language: | English |
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Shiraz University of Medical Sciences
2021-03-01
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| Series: | Journal of Dentistry |
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| Online Access: | https://dentjods.sums.ac.ir/article_46670.html |
| _version_ | 1818872710709641216 |
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| author | Zahra Mohammadi Meysam Mahabadi Gholamreza Tabbakhian Mahmud Talaakoob |
| author_facet | Zahra Mohammadi Meysam Mahabadi Gholamreza Tabbakhian Mahmud Talaakoob |
| author_sort | Zahra Mohammadi |
| collection | DOAJ |
| description | Statement of the Problem: The 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/computer-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). The 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 could serve as a suitable alternative to those alloys. |
| first_indexed | 2024-12-19T12:43:08Z |
| format | Article |
| id | doaj.art-946ae1d8ecce429581d215288e66e6e0 |
| institution | Directory Open Access Journal |
| issn | 2345-6485 2345-6418 |
| language | English |
| last_indexed | 2024-12-19T12:43:08Z |
| publishDate | 2021-03-01 |
| publisher | Shiraz University of Medical Sciences |
| record_format | Article |
| series | Journal of Dentistry |
| spelling | doaj.art-946ae1d8ecce429581d215288e66e6e02022-12-21T20:20:53ZengShiraz University of Medical SciencesJournal of Dentistry2345-64852345-64182021-03-01221212610.30476/DENTJODS.2020.84347.1076Bond Strength of Porcelain to Milled Sintered and Casting Base Metal AlloysZahra Mohammadi 0Meysam Mahabadi 1Gholamreza Tabbakhian 2Mahmud Talaakoob 3Postgraduate Student, Dept. of Prosthetic Dentistry, Faculty of Dentistry, Isfahan Islamic Azad University, Khorasgan Branch, Isfahan, Iran. Dept. of Prosthetic Dentistry, Faculty of Dentistry, Isfahan Islamic Azad University, Khorasgan Branch, Isfahan, Iran. Dept. of Prosthetic Dentistry, Faculty of Dentistry, Isfahan Islamic Azad University, Khorasgan Branch, Isfahan, Iran. Dental Technician, Master of Science, Faculty of Dentistry, Isfahan Islamic Azad University, Khorasgan Branch, Isfahan, Iran. Statement of the Problem: The 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/computer-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). The 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 could serve as a suitable alternative to those alloys.https://dentjods.sums.ac.ir/article_46670.htmlbond strength; cad-cam; casting; metal-ceramic; milled sintered alloy |
| spellingShingle | Zahra Mohammadi Meysam Mahabadi Gholamreza Tabbakhian Mahmud Talaakoob Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys Journal of Dentistry bond strength; cad-cam; casting; metal-ceramic; milled sintered alloy |
| title | Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys |
| title_full | Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys |
| title_fullStr | Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys |
| title_full_unstemmed | Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys |
| title_short | Bond Strength of Porcelain to Milled Sintered and Casting Base Metal Alloys |
| title_sort | bond strength of porcelain to milled sintered and casting base metal alloys |
| topic | bond strength; cad-cam; casting; metal-ceramic; milled sintered alloy |
| url | https://dentjods.sums.ac.ir/article_46670.html |
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