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:: Volume 6, Issue 3 (Autumn 2014 2014) ::
JNKUMS 2014, 6(3): 647-655 Back to browse issues page
Evaluation the failure mode of Ceramco and Noritake porcelains bonded to commend based metal alloy after different surface treatments
M Mahabadi , M Barekatain , F Alizadeh , A Riahi Dehkordi , AH Kasian
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Abstract Background & Objectives: one of the most common problems in metal ceramic restorations is the loss of porcelain- metal bond that causes the treatment to fail. The aim of this study was to evaluate fracture mode of Ceramco and Noritake porcelains bonded to Commend base metal alloy after various surface treatments. Materials and Methods : In this laboratory study, 64 wax papers in size of 1 x 8 x 25 mm were cut with a surgical blade and after investing , burning out, casting with base metal alloy and surface treatment, were divided randomly into two groups. Porcelain application was done by Cermco porcelain in one group and by Noritake porcelain in the other. Surface treatment in each group was randomly accomplished by one of four different methods to improve metal-porcelain bonding. Porcelain fracture of the samples was evaluated by 3- point bending test by Universal Testing Machine with the speed of 1 mm per minute. Photos were taken from the samples. Results In the Ceramco porcelain group, the highest percent of cohesive failure was in the sandblast, grinding, sandblast, oxidation subgroup (22%) and in the Noritake porcelain group, it was in the sandblast , grinding, sandblast, steam cleaning , oxidation subgroup (96.97%)( P value<0.001). Conclusion: Performance of oxidation stage increases the percent of cohesive failures. Type of applied porcelain is effective on percent of cohesive failure without considering type of surface treatment and Noritake porcelain showed more failure.

Keywords: Key words: bond strength, cohesive, adhesive, dental crown, metal ceramic alloy, failure
Full-Text [PDF 325 kb]   (311 Downloads)    
Type of Study: Orginal Research | Subject: Basic Sciences
Received: 2015/03/28 | Accepted: 2015/03/28 | Published: 2015/03/28
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Mahabadi M, Barekatain M, Alizadeh F, Riahi Dehkordi A, kasian A. Evaluation the failure mode of Ceramco and Noritake porcelains bonded to commend based metal alloy after different surface treatments. JNKUMS. 2014; 6 (3) :647-655
URL: http://journal.nkums.ac.ir/article-1-383-en.html

Volume 6, Issue 3 (Autumn 2014 2014) Back to browse issues page
مجله دانشگاه علوم پزشکی خراسان شمالی Journal of North Khorasan University of Medical Sciences
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