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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.)

Influence of filler addition, storage medium and evaluation time on biaxial flexure strength and modulus of adhesive systems

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Author(s):
Giannini, Marcelo [1] ; Liberti, Michele Santana [1] ; Galvao Arrais, Cesar Augusto [2] ; Reis, Andre Figueiredo [2] ; Mettenburg, Donald [3] ; Rueggeberg, Frederick Allen [3]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, Dept Restorat Dent, Piracicaba Dent Sch, Operat Dent Div, BR-13414903 Piracicaba, SP - Brazil
[2] Univ Guarulhos, Dept Operat Dent, Sch Dent, Guarulhos, SP - Brazil
[3] Georgia Hlth Sci Univ, Dept Oral Rehabil, Dent Mat Sect, Sch Dent, Augusta, GA - USA
Total Affiliations: 3
Document type: Journal article
Source: ACTA ODONTOLOGICA SCANDINAVICA; v. 70, n. 6, p. 478-484, DEC 2012.
Web of Science Citations: 8
Abstract

Objective. This study evaluated the effects of filler addition, storage medium and time on biaxial flexural strength and flexural modulus of six adhesive systems. Materials and methods. The adhesives were either unfilled resins: Single Bond, Prime\&Bond 2.1 and One-Step; or filled resins: Single Bond Plus, Prime\&Bond NT and One-Step Plus. Resin discs of each product (0.5 mm thick x 6.0 mm diameter) were prepared using silicon molds (n = 10). The discs were stored dry, in water, mineral oil or ethanol for 1 week or 3 months before biaxial flexural testing. Data were statistically analyzed by 3-way ANOVA and Tukey's post-hoc test (alpha = 0.05). The specimens were tested in a universal testing machine at 1.27 mm/min until failure occurred. Results. In general, the storage in ethanol led to significantly lower flexural strength and flexural modulus values than the other storage conditions for all adhesives in both storage periods. Filler addition increased flexural strength and flexural modulus for Prime\&Bond NT, when it was stored dry or in water for 1 week. For Single Bond Plus, the filler addition resulted in higher flexural modulus, when it was stored for 1 week in oil and in ethanol. No significant differences in flexural modulus were observed between One-Step and One-Step Plus in any storage medium. Conclusions. Results suggested that filler addition does not necessarily have to increase the flexural strength and flexural modulus. Ethanol and oil storages tended to yield opposite effects. (AU)