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Journal of Dentistry, Shiraz University of Medical Sciences، جلد ۱۲، شماره ۴، صفحات ۳۲۷-۰
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| عنوان فارسی |
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| چکیده فارسی مقاله |
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| کلیدواژه‌های فارسی مقاله |
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| عنوان انگلیسی |
A Comparison of Fracture Resistance of Zirconia Copings Made with CAD/CAM Technology and Slip Casting Technique |
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| چکیده انگلیسی مقاله |
Statement of Problem: Zirconia has been introduced as an appropriate structure for fabricating metal free copings. A major advantage of such restorations is esthetic concerns; however, due to its high strength, zirconia can also be used in posterior areas. One of the recent methods of making these restorations is CAD/CAM machines. Purpose: This study aimed to evaluate the fracture resistance of zirconia copings fabricated by two methods, CAD/CAM and slip casting Materials and Method: 32 brass dies were fabricated for this study and divided into two groups of 16 dies each. Zirconia copings were made by CAD/CAM machine for one group and by slip casting method for the other. The copings were cemented to dies by a resin-modified glass ionomer (GC plus). A hardened steel ball with a diameter of 5 mm was used to apply the load to the copings in the long axis of the dies at a crosshead speed of 0.5 mm/min. Then the amount of force needed to fracture each coping was recorded. Independent Sample T-test was used to compare the two groups. Results: The average of fracture resistance for the CAD/CAM group was 1411± 424 N and for the slip cast group it was 1542±412 N, having no significant difference ( p > 0.05). Conclusion: Zirconia copings made by CAD/CAM and slip casting methods have no significant difference in fracture resistance. |
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| کلیدواژه‌های انگلیسی مقاله |
Zirconia Coping, CAD/CAM, Slip casting |
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| نویسندگان مقاله |
k ترابی | k torabi
dept. of prosthodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (Shiraz university of medical sciences)
ah آهنگری | ah ahangari
dept. of prosthodontics, school of dentistry, shiraz university of medical sciences, shiraz, iran
سازمان اصلی تایید شده: دانشگاه علوم پزشکی شیراز (Shiraz university of medical sciences)
صالحی | s salehi
dept. of prosthodontics, school of dentistry, ahwaz university of medical sciences, ahwaz, iran
مهرتاش معتمدی | m motamedi
prosthodontist
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| نشانی اینترنتی |
http://dentjods.sums.ac.ir/index.php/JDSUMS/article/view/90 |
| فایل مقاله |
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| کد مقاله (doi) |
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| زبان مقاله منتشر شده |
en |
| موضوعات مقاله منتشر شده |
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| نوع مقاله منتشر شده |
Original Article |
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