Influence of pH and time on organic substance release from a model dental composite: a fluorescence spectrophotometry and gas chromatography/mass spectrometry analysis.
Artikel i vetenskaplig tidskrift, 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

Författare

Ulf Örtengren

Göteborgs universitet

Anna Göransson

Göteborgs universitet

Ted Lundgren

Göteborgs universitet

European Journal of Oral Sciences

0909-8836 (ISSN) 1600-0722 (eISSN)

Vol. 112 6 530-7

Ämneskategorier

Odontologi

DOI

10.1111/j.1600-0722.2004.00164.x

PubMed

15560837