Fabrication And Characterization Of Experimental Nanocomposites For Dental Restoration
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Date
2012
Authors
Tuan Rahim, Tuan Noraihan Azila
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Currently, restorative dental composites have become preferred among patients due
to their aesthetic characteristic and also their durability. The high costs of
composites, as well as the rising demand by patients have lead researchers to produce
a local product with equivalent standard as compared to the commercially available
dental composites. Recently, monodispersed, spherical silica nanofillers with a size
range of 10-20 nm were successfully synthesized via a sol-gel process and have a
great potential to be used in fabrication of dental composites. Therefore, this present
study was carried out to fabricate and characterize the experimental dental
nanocomposite from the synthesized nanosilica fillers. Dental composites, namely
experimental nanocomposite 1 (ENC1) and experimental nanocomposite 2 (ENC2)
with two different filler content, 30 and 35 wt% respectively were fabricated, molded
and polymerized with a light curing unit for 40 s. The properties that were tested
including their flexural strength, modulus, compressive strength, micro hardness,
degree of conversion, volumetric shrinkage, water sorption, solubility, surface
roughness as well as filler distribution. The data obtained were statistically analyzed
with One-Way ANOVA with the level of significance p=0.05. Various type of
commercial composites i.e. FiltekTM Z350 (nanocomposite), Spectrum® TPH®3
(microhybrid), Z100TM (hybrid) and Durafill® VS (microfilled) were chosen to
compare their properties with the experimental nanocomposites. The properties of
composites were also referred to the ISO and ANSI/ADA No. 27 requirements. From
the results obtained, it can be summarized that the experimental nanocomposites and
commercial composites complied with the ISO and ANSI/ADA No. 27 requirements.
Similar properties can be found between experimental nanocomposites and Durafill®
VS (microfilled composite) regarding their flexural strength, modulus, compressive
strength, hardness and also surface roughness. These properties are sufficiently to be
applied at the anterior restoration.
Description
Keywords
Fabrication and characterization of , experimental nanocomposites for dental restoration