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Influence of the artificial saliva storage on 3‐D surface texture characteristics of contemporary dental nanocomposites
Author(s) -
ŢĂLU ŞTEFAN,
BRAMOWICZ MIROSLAW,
KULESZA SLAWOMIR,
LAINOVIĆ TIJANA,
VILOTIĆ MARKO,
BLAŽIĆ LARISA
Publication year - 2016
Publication title -
journal of microscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.569
H-Index - 111
eISSN - 1365-2818
pISSN - 0022-2720
DOI - 10.1111/jmi.12432
Subject(s) - fractal dimension , materials science , surface finish , anisotropy , saliva , surface roughness , box counting , texture (cosmology) , atomic force microscopy , composite material , fractal analysis , fractal , chemistry , nanotechnology , mathematics , optics , artificial intelligence , physics , mathematical analysis , biochemistry , image (mathematics) , computer science
Summary The aim of this study was to analyse the influence of the artificial saliva on a three‐dimensional (3‐D) surface texture of contemporary dental composites. The representatives of four composites types were tested: nanofilled (Filtek Ultimate Body, FUB), nanohybrid (Filtek Z550, FZ550), microfilled (Gradia Direct, GD) and microhybrid (Filtek Z250, FZ250). The specimens were polymerised and polished by the multistep protocol (SuperSnap, Shofu). Their surface was examined, before and after 3 weeks’ exposure to artificial saliva storage. The surface texture was analysed using the atomic force microscope (AFM). The obtained images were processed to calculate the areal autocorrelation function (AACF), anisotropy ratio S tr (texture aspect ratio), and structure function (SF). The log–log plots of SF were used to calculate fractal properties, such as fractal dimension D, and pseudo‐topothesy K. The analysis showed changes in surface anisotropy ratio S tr values, which became higher, whereas the S q roughness (root‐mean‐square) reduced after the artificial saliva storage. All the samples exhibited bifractal structure before the saliva treatment, but only half of them remained bifractal afterwards (GD, FZ250), whereas the other half turned into a monofractal (FUB, FZ550). The cube‐count fractal dimension D cc was found to be material‐ and treatment‐insensitive.