Evaluation of ceramic flexural strength of a cobalt-chromium alloy subjected to airborne particle abrasion and tungsten inert gas welding
Braz. j. oral sci
;
18: e191443, jan.-dez. 2019. ilus
Article
in English
| LILACS, BBO
| ID: biblio-1094899
ABSTRACT
Aim:
The aim of this study was to evaluate the influence of tungsten inert gas (TIG) welding and airborne particle abrasion using aluminum oxide particles on the flexural strength of a joint between ceramic and cobalt-chromium alloys.Methods:
The specimens were cast and welded using TIG, then divided into 6 groups (n = 10) and subjected to blasting with 250 µm, 100 µm, and 50 µm aluminum oxide particles. Ceramic systems were applied to the central part of all specimens. A three-point bending test using a velocity of 0.5 mm/m was performed on the specimens to measure flexural strength. Data were analyzed using two-way analysis of variance and Tukey's test.Results:
TIG welding demonstrated the lowest resistance compared with the non-welded groups. Airborne particle abrasion using 250 µm aluminum oxide particles demonstrated greater resistance in the welded groups (p < 0.05). Mixed faults were found in all specimens.Conclusion:
TIG welding decreased the bond strength, and the particle size of aluminum oxide did not affect the metal-ceramic bond in groups without TIG welding
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Dental Soldering
/
Chromium Alloys
/
Dental Materials
/
Dental Porcelain
Language:
English
Journal:
Braz. j. oral sci
Journal subject:
Dentistry
Year:
2019
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Federal University of Pará (UFPA)/BR
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