The purpose of this study was to evaluate and compare the mechanical
behavior of five nanofilled composites with dentin and enamel shades
trough diametral tensile strength and knoop microhardness. 4 Seasons
(Ivoclar Vivadent), Esthet X improved (Dentsply), Filtek Supreme (3M),
Grandio (Voco) and Palfique Estelite (Tokuyama Dental Corp.) were used
in this research. Twenty samples (6 mm diameter and 3 mm thickness) of
each material were used. Ten samples were submitted to knoop
microhardness and the others to diametral tensile strength examinations.
The results were submitted to ANOVA and Tukey statistical tests
(a=0.05). There were significant differences between the tested groups
(p<0.05). The diametral tensile strength ranged from 36.08 (4
Seansons dentin) to 49.24 (Grandio enamel). The knoop microhardness
ranged from 54.45 (Esthet X improved enamel) to 123.90 (Grandio dentin).
A great variability in the mechanical behavior of the nanofilled
composites was observed. However it was not recorded with dentin and
enamel shades with the exception of Grandio.
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