Influence of pH and time on organic substance release from a model dental composite: a fluorescence spectrophotometry and gas chromatography/mass spectrometry analysis.
Journal article, 2004
In this study we assessed the influence of pH and time on the degradation and elution of organic substances from the composite resin material, Z-100. To accomplish this, fluorescence spectrophotometry was evaluated as an appropriate technique for the identification of six organic substances (methacrylic acid, methyl methacrylate, hydroquinone, ethylene glycol dimethacrylate, triethylene glycol dimethacrylate and 4,4'-isopropylidenediphenol) that were eluted from resin composite material stored for 24 h or 6 months at pH 4.0, 6.0 or 8.0. In addition, complementary analyses (solid-phase microextraction/gas chromatography/mass spectrometry) were carried out to identify and quantify the substances. The main substances leached from the resin composite were methacrylic acid, triethylene glycol dimethacrylate and hydroquinone. It was concluded that fluorescence spectrophotometry seems to be a suitable, non-destructive technique for the qualitative analysis of eluted organic components. Critical combinations of time and pH allowed the elution of several organic substances, predominantly methacrylic acid, triethylene glycol dimethacrylate and hydroquinone, from the model resin composite, Z-100.
Alkenes
analysis
analysis
chemistry
chemistry
Methacrylates
chemistry
chemistry
analysis
chemistry
chemistry
Organic Chemicals
Cross-Linking Reagents
Polyethylene Glycols
Methylmethacrylate
Acrylates
analysis
Gas Chromatography-Mass Spectrometry
Materials Testing
Fluorescence
Hydroquinones
Spectrometry
analysis
Polymethacrylic Acids
Humans
Time Factors
Hydrogen-Ion Concentration
analysis
Phenols
chemistry
analysis
chemistry
analysis
analysis
Silicon Dioxide
Zirconium
analysis
analysis
chemistry
analysis
analysis
chemistry
Composite Resins
chemistry
chemistry
Diffusion
chemistry
Author
Ulf Örtengren
University of Gothenburg
Sarka Langer
Anna Göransson
University of Gothenburg
Ted Lundgren
University of Gothenburg
European Journal of Oral Sciences
0909-8836 (ISSN) 1600-0722 (eISSN)
Vol. 112 6 530-7Subject Categories
Dentistry
DOI
10.1111/j.1600-0722.2004.00164.x
PubMed
15560837