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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Fatigue behavior of Y-TZP ceramic after surface treatments

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Author(s):
Amaral, Marina [1] ; Cesar, Paulo Francisco [2] ; Bottino, Marco Antonio [1] ; Lohbauer, Ulrich [3] ; Valandro, Luiz Felipe [4]
Total Authors: 5
Affiliation:
[1] Sao Paulo State Univ, Sch Dent, Dept Dent Mat & Prosthesis, Ave Eng Franscisco Jose Longo, Sao Jose Dos Campos - Brazil
[2] Univ Sao Paulo, Sch Dent, Dept Dent Mat, Ave Prof Lineu Prestes 2227, Sao Paulo - Brazil
[3] Univ Erlangen Nurnberg, Dent Clin Operat Dent & Periodontol 1, Lab Biomat Res, Gluedstr 11, Erlangen - Germany
[4] Univ Fed Santa Maria, Prosthodont Unit, Sch Dent, Dept Restorat Dent, Rua Marechal Floriano Peixoto 1184, BR-97015372 Santa Maria, RS - Brazil
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS; v. 57, p. 149-156, APR 2016.
Web of Science Citations: 15
Abstract

Objectives: The aim of this study was to evaluate the effect of three surface treatments on the biaxial flexural strength before and after mechanical cycling, and fatigue limit of a Y-TZP ceramic. Methods: Disc-shaped specimens were produced and three surface conditions were tested: CT (as-sintered, untreated), GL (thin layer of porcelain glaze), and AA (air abrasion with 30 mu m silica particles). Profilometric and phase transformation analyses were performed. Disks were submitted to biaxial flexural strength (BFS) before and after mechanical cycling (100 N, 2 x 10(6) cycles) and staircase approach (n=20). The flexural fatigue limits (FFLs) were obtained at 10(2), 10(3), 10(4) and 10(5) cycles. Results: Tetragonal to monoclinic transformation was only observed for AA group (9.46% of monoclinic phase). Glazed group presented the highest Ra values. Flexural strength was higher for AA group; CT and GL groups were similar. The reliability was similar between groups. The mechanical cycling at 100 N did not affected flexural strength. FFLs were higher for AA group, and the three surface treatments presented decrease in strength according to the increase in number o cycles. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 10/20077-0 - Effect of two surface treatments for zirconia ceramic on adhesion and fatigue behavior
Grantee:Marina Amaral
Support Opportunities: Scholarships in Brazil - Doctorate