TY - JOUR
T1 - Influence of filler addition, storage medium and evaluation time on biaxial flexure strength and modulus of adhesive systems
AU - Giannini, Marcelo
AU - Liberti, Michele Santana
AU - Arrais, César Augusto Galvão
AU - Reis, André Figueiredo
AU - Mettenburg, Donald
AU - Rueggeberg, Frederick Allen
N1 - Funding Information:
This study was supported by grants from FAEPEX-PRP/UNICAMP (#34/07), FAPESP (#06/57998-0), CNPq (#305777/2010-6), Brazil and Georgia Health Sciences University, Augusta, GA, USA.
PY - 2012/12
Y1 - 2012/12
N2 - 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 × 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 (α = 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.
AB - 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 × 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 (α = 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.
KW - Adhesive
KW - Biaxial flexural strength
KW - Filler
KW - Flexural modulus
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U2 - 10.3109/00016357.2011.639308
DO - 10.3109/00016357.2011.639308
M3 - Article
C2 - 22150012
AN - SCOPUS:84867306273
SN - 0001-6357
VL - 70
SP - 478
EP - 484
JO - Acta Odontologica Scandinavica
JF - Acta Odontologica Scandinavica
IS - 6
ER -