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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.)

Characterisation of a new plasma-enhanced film to improve shear bond strength between zirconia and veneering ceramic

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Bitencourt, Sandro B. [1] ; dos Santos, Daniela M. [1] ; da Silva, Emily V. F. [1] ; Barao, Valentim A. R. [2] ; Rangel, Elidiane C. [3] ; da Cruz, Nilson C. [3] ; de Souza, Grace M. [4] ; Goiato, Marcelo C. [1] ; Pesqueira, Aldieris A. [1]
Total Authors: 9
[1] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, R Jose Bonifacio 1193, BR-16015050 Aracatuba, SP - Brazil
[2] Univ Campinas UNICAMP, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Ave Limeira 901, BR-13414903 Piracicaba, SP - Brazil
[3] Univ Estadual Paulista UNESP, ICTS, Lab Technol Plasmas, Ave Tres de Marco 511, BR-18087180 Sorocaba, SP - Brazil
[4] Univ Toronto, Fac Dent, Dept Clin Sci, 124 Edward St, Toronto, ON M5G 1G6 - Canada
Total Affiliations: 4
Document type: Journal article
Source: Materials Science & Engineering C-Materials for Biological Applications; v. 92, p. 196-205, NOV 1 2018.
Web of Science Citations: 2

The aim of this study was to develop and characterise a new plasma-enhanced chemical vapor deposition (PECVD) film for improving shear bond strength (SBS) between yttria-stabilised tetragonal zirconia (Y-TZP) and veneering ceramic. In total, 192 Y-TZP samples (13 x 5.4 x 5 mm) were divided into 6 groups: control - no treatment (C), airborne-particle abrasion with 27 mu m aluminum oxide particles (Al-27), 110 mu m aluminum oxide particles (Al-110), and 250 mu m aluminum oxide particles (Al-250, application of liner for zirconia (L) and the PECVD film application (P). The Y-TZP surface was characterised by means of Scanning Electronic Microscopy (SEM), Energy-dispersive Spectroscopy (EDS), atomic force microscopy (AFM), surface profilometry and surface free energy (SFE). SBS between Y-TZP and veneering ceramic was tested before and after thermocycling (20,000 cycles of 5 and 55 degrees C), and failure mode was also evaluated. Data were analysed by ANOVA and Tukey's HSD test (alpha = 0.05). Data analysis showed that PECVD film had no effect on surface roughness of Y-TZP (p > 0.05 vs control), whilst the other groups presented higher roughness values (p < 0.05). All treatments increased SFE, except the Al-27 group. The highest SBS was presented by the P group (p < 0.05), and values were similar to those of the Al-27 group (p = 0.107). Mixed failures were prevalent in all groups, and premature failures were found only in Al groups after thermocycling. Whilst PECVD treatment did not affect Y-TZP surface roughness, high SBS between Y-TZP and the veneering layer was observed. Therefore, PECVD treatment is a promising alternative to improve the performance of bi-layer zirconia-based restorations. (AU)

FAPESP's process: 15/10826-9 - Analysis of the interface zirconia/coating ceramic after different surface treatments and aging, by means of structural characterization and bond strength
Grantee:Sandro Basso Bitencourt
Support Opportunities: Scholarships in Brazil - Master
FAPESP's process: 15/11412-3 - Analysis of the interface zirconia/coating ceramic after different surface treatments and aging, by means of structural characterization and bond strength
Grantee:Aldiéris Alves Pesqueira
Support Opportunities: Regular Research Grants