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Flexural strengths of conventional and nanofilled fiber‐reinforced composites: a three‐point bending test
Author(s) -
Sfondrini Maria Francesca,
Massironi Sarah,
Pieraccini Giulia,
Scribante Andrea,
Vallittu Pekka K.,
Lassila Lippo V.,
Gandini Paola
Publication year - 2014
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/edt.12055
Subject(s) - deflection (physics) , flexural strength , composite material , materials science , three point flexural test , curing (chemistry) , physics , optics
Objectives The purpose of this study was to evaluate the effect of the introduction of nanofillers on the mechanical properties of fiber‐reinforced composites ( FRC s) for stabilization and conservative treatment of multiple traumatized anterior teeth. In particular, the aim of the research was to point out the force levels of two sizes (diameters 0.6 and 0.9 mm) of both conventional and nanofilled FRC s. Methods Eighty FRC s samples were divided into eight groups, each consisting of 10 specimens. Conventional (groups 1, 2, 3, and 4) and nanofilled (groups 5, 6, 7, and 8) FRC samples were evaluated. Each FRC was tested in two diameters (0.6 and 0.9 mm) and under two deflections (1 and 2 mm). Each sample was polymerized with the same halogen curing unit and then evaluated with a 3‐point bending test on a universal testing machine after 48 h of dry storage. Results Nanofilled FRC s showed significantly higher load values than conventional FRC s. Moreover, 0.9‐mm‐diameter FRC s showed significantly higher load value than 0.6‐mm‐diameter FRC s. Specimens tested at 2‐mm deflection showed significantly higher load values than those tested at 1‐mm deflection. Conclusions Nanofilled FRC s showed significantly higher load values than conventional FRC s. Higher flexural strength values were recorded with 1‐mm deflection for both FRC tested.