Effect of seating forces on cement-ceramic adhesion in microtensile bond tests
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
01/01/2013
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Resumo |
Objectives: The aim of this study was to evaluate the effect of different seating forces during cementation in cement-ceramic microtensile bond strength (μTBS). Materials and methods: Forty-five blocks (5 × 5 × 4 mm3) of a glass-infiltrated alumina-based ceramic (In-Ceram Alumina) were fabricated according to the manufacturer's instructions and duplicated in resin composite. Ceramic surfaces were polished, cleaned for 10 min in an ultrasonic bath, silica coated using a laboratory type of air abrasion device, and silanized. Each treated ceramic block was then randomly assigned to five groups (n = 9) and cemented to a composite block under five seating forces (10 g, 50 g, 100 g, 500 g, and 750 g) using a dual-cured resin cement (Panavia F). The ceramic-cement-composite assemblies were cut under coolant water to obtain bar specimens (1 mm × 0. 8 mm2). The μTBS tests were performed in a universal testing machine (1 mm/min). The mean bond strengths values were statistically analyzed using one-way ANOVA (α ≤ 0. 05). Results: Different seating forces resulted in no significant difference in the μTBS results ranging between 13. 1 ± 4. 7 and 18. 8 ± 2. 1 MPa (p = 0. 13) and no significant differences among cement thickness. Conclusions: Excessive seating forces during cementation seem not to affect the μTBS results. Clinical relevance: Excessive forces during the seating of single all-ceramic restorations cementation seem to display the same tensile bond strength to the resin cement. © 2012 Springer-Verlag. |
Formato |
325-331 |
Identificador |
http://dx.doi.org/10.1007/s00784-011-0668-y Clinical Oral Investigations, v. 17, n. 1, p. 325-331, 2013. 1432-6981 1436-3771 http://hdl.handle.net/11449/74117 10.1007/s00784-011-0668-y WOS:000313072200037 2-s2.0-84871939065 |
Idioma(s) |
eng |
Relação |
Clinical Oral Investigations |
Direitos |
closedAccess |
Palavras-Chave | #Cementation #Glass-infiltrated alumina-based ceramic #Microtensile bond strength #Seating forces |
Tipo |
info:eu-repo/semantics/article |