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Degradation and Mechanical Properties of Zirconia 3‐Unit Fixed Dental Prostheses Machined on a CAD/CAM System
Author(s) -
Elias Carlos Nelson,
Melo Andréa Matos,
dos Santos Heraldo Elias Salomão,
dos Santos Claudinei
Publication year - 2013
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12118
Subject(s) - materials science , flexural strength , cubic zirconia , composite material , bending , dental prosthesis , ceramic , toughness , significant difference , dentistry , orthodontics , mathematics , medicine , surgery , statistics , implant
The manufacturing of ceramics fixed dental prostheses ( FDP s) is not the same as that of standardized samples and, therefore, the surface finishing are not necessarily the same in both cases. Standardized samples and FDP s were sintered, polished, hydrothermally aged in saliva, and submitted to mechanical tests. The results showed a difference in bending strength between machined (911.19 MP a) and polished FDP s (573.84 MP a). ANOVA statistical analysis did not show a difference in flexural strength between nondegraded (911.19 MP a) and degraded (871.94 MP a) FDP s. No differences were found in the bending strength and toughness of standardized samples and FDP s.