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Torabi, K., Ahangari, AH., Salehi, S., Motamedi, M.. (1390). A Comparison of Fracture Resistance of Zirconia Copings Made with CAD/CAM Technology and Slip Casting Technique. سامانه مدیریت نشریات علمی, 12(4), 327-333.
K. Torabi; AH. Ahangari; S. Salehi; M. Motamedi. "A Comparison of Fracture Resistance of Zirconia Copings Made with CAD/CAM Technology and Slip Casting Technique". سامانه مدیریت نشریات علمی, 12, 4, 1390, 327-333.
Torabi, K., Ahangari, AH., Salehi, S., Motamedi, M.. (1390). 'A Comparison of Fracture Resistance of Zirconia Copings Made with CAD/CAM Technology and Slip Casting Technique', سامانه مدیریت نشریات علمی, 12(4), pp. 327-333.
Torabi, K., Ahangari, AH., Salehi, S., Motamedi, M.. A Comparison of Fracture Resistance of Zirconia Copings Made with CAD/CAM Technology and Slip Casting Technique. سامانه مدیریت نشریات علمی, 1390; 12(4): 327-333.

A Comparison of Fracture Resistance of Zirconia Copings Made with CAD/CAM Technology and Slip Casting Technique

Journal of Dentistry
مقاله 6، دوره 12، شماره 4، اسفند 2011، صفحه 327-333    اصل مقاله (216.16 K)
نوع مقاله: Original Article
نویسندگان
K. Torabi1؛ AH. Ahangari1؛ S. Salehi* 2؛ M. Motamedi3
1Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
2Dept. of Prosthodontics, School of Dentistry, Ahwaz University of Medical Sciences, Ahwaz, Iran
3Prosthodontist
چکیده
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.
کلیدواژه‌ها
Zirconia Coping؛ CAD/CAM؛ Slip casting
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