Long-term sorption and solubility of bulk-fill and conventional resin-composites in water and artificial saliva
Abstract
Objectives
To
assess sorption and solubility of several bulk-fill and conventional
resin- composites after one-year storage in water and artificial saliva
(AS).
Methods
Six bulk-fill
(SureFil SDR, Venus Bulk Fill, X-tra base, Filtek Bulk Fill flowable,
Sonic Fill, and Tetric EvoCeram Bulk Fill) and eight conventional
resin-composites (Grandioso Flow, Venus Diamond Flow, XFlow, Filtek
Supreme XTE, Grandioso, Venus Diamond, TPH Spectrum, and Filtek Z250)
were tested. Disc shaped samples (n= 5) were randomly immersed into
distilled water and AS for one-year period and weighed at different time
intervals. Data were analysed using repeated measures ANOVA, one-way
ANOVA, and Tukey's post hoc test (α=0.05).
Results
In
water, all materials (with the exception of X- Flow) reached a stable
mass within three months with a slow increase observed in AS up to one
year. Sorption values in water and AS for most materials were not
significantly different (p≥ 0.2). Sorption and solubility values in
water ranged from (6.5μg/mm3 and -1.77μg/mm3 respectively) for X-tra
base to (78.8μg/mm3 and 44.77 μg/mm3 respectively) for X- Flow (p<
0.005). Sorption of the polymer matrix in water ranged from 1.18 % for
XB to 9.95 % for XF.
Conclusions
Water
sorption and solubility of resin-composites are material-dependent and
highly affected by the filler loading and hydrophilicity of the resin
matrix. BisEMA and UDMA-BisEMA based resins appeared to be more
hydrophobic than BisGMA based systems. Water and AS, are generally
comparable as storage media in terms of water sorption.
Comments