Microhardness of bulk-fill composite materials.
MICROHARDNESS OF BULK-FILL COMPOSITE MATERIALS.
Acta Clin Croat. 2016 12;55(4):607-14
Authors: Kelić K, Matić S, Marović D, Klarić E, Tarle Z
Abstract
The aim of the study was to determine microhardness of high- and low-viscosity
bulk-fill composite resins and compare it with conventional composite materials. Four materials
of high-viscosity were tested, including three bulk-fills: QuiXfi l (QF), x-tra fi l (XTF) and Tetric
EvoCeram Bulk Fill (TEBCF), while nanohybrid composite GrandioSO (GSO) served as control.
The other four were low-viscosity composites, three bulk-fill materials: Smart Dentin Replacement
(SDR), Venus Bulk Fill (VBF) and x-tra base (XB), and conventional control material X-Flow (XF).
Composite samples (n=5) were polymerized for 20 s with Bluephase G2 curing unit. Vickers hardness
was used to determine microhardness of each material at the surface, and at 2-mm and 4-mm depth.
GSO on average recorded significantly higher microhardness values than bulk-fill materials (p<0.001).
The low-viscosity composite XF revealed similar microhardness values as SDR, but significantly lower
than XB (p<0.001) and significantly higher than VBF (p<0.001). Microhardness of high-viscosity
bulk-fill materials was lower than microhardness of the conventional composite material (GSO).
Surface microhardness of low-viscosity materials was generally even lower. The microhardness of all
tested materials at 4 mm was not different ...
Source: Acta Clinica Croatica - Category: General Medicine Tags: Acta Clin Croat Source Type: research