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Adhesion to Y‐TZP ceramic: Study of silica nanofilm coating on the surface of Y‐TZP
Author(s) -
Druck Carolina Ceolin,
Pozzobon João Luiz,
Callegari Gustavo Luiz,
Dorneles Lucio Strazzabosco,
Valandro Luiz Felipe
Publication year - 2015
Publication title -
journal of biomedical materials research part b: applied biomaterials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.665
H-Index - 108
eISSN - 1552-4981
pISSN - 1552-4973
DOI - 10.1002/jbm.b.33184
Subject(s) - ceramic , materials science , adhesion , coating , composite material , chemical engineering , engineering
This study evaluated the influence of silica‐based film coatings on the surface of yttrium‐stabilized tetragonal zirconia polycrystal (Y‐TZP), in particular on the durability of the bond strength between the ceramic and resin cement. Eighty Y‐TZP (In‐Ceram YZ, Vita) blocks (4 × 4 × 3 mm) were obtained and divided into four groups according to the surface treatments ( n = 20): tribochemical silica coating (TBS; Cojet, 3M/ESPE), 5 nm SiO 2 nanofilm and silanization (F‐5), 500 nm SiO 2 nanofilm and silanization (F‐500), and 500 nm SiO 2 nanofilm + hydrofluoric‐acid‐etching + silanization (F‐500HF). Specimens of composite resin (3.25 mm in diameter and 3 mm in height) were cemented to Y‐TZP blocks using resin cement (Relyx ARC). Half of the specimens from each group were tested 24 h after adhesion (B: baseline condition), and the other half were subjected to aging (A: storage for 90 days and 10,000 thermal cycles). The specimens were subjected to shear testing (SBS) (1 mm/min). After testing, the surfaces were analyzed with a stereomicroscope and scanning electron microscope. Micromorphologic and elemental chemical analyses of the treated Y‐TZP surface were made by X‐ray energy dispersive spectroscopy. Bond strength data were statistically analyzed by Kruskal–Wallis/Mann–Whitney tests ( α = 0.05). The surface treatment showed significant differences for B ( p = 0.0001) and A ( p = 0.0000) conditions. In both storage conditions, TBS and F‐5 groups promoted the significantly highest bond strength. Most of the specimens presented adhesive failure. The X‐ray energy dispersive spectroscopy analysis depicted the highest peak of silica in the TBS, F‐5, and F‐500 groups. The adhesion to zirconia can be improved if the surface receives a 5 nm layer of SiO 2 nanofilm or is subjected to sandblasting with silica particles, followed by silanization. © 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 103B: 143–150, 2015.