Back to Search
Start Over
Influence of pH and time on organic substance release from a model dental composite: a fluorescence spectrophotometry and gas chromatography/mass spectrometry analysis.
- Source :
-
European journal of oral sciences [Eur J Oral Sci] 2004 Dec; Vol. 112 (6), pp. 530-7. - Publication Year :
- 2004
-
Abstract
- 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.<br /> (Copyright Eur J Oral Sci, 2004.)
- Subjects :
- Acrylates analysis
Alkenes analysis
Alkenes chemistry
Composite Resins analysis
Cross-Linking Reagents analysis
Cross-Linking Reagents chemistry
Diffusion
Gas Chromatography-Mass Spectrometry
Humans
Hydrogen-Ion Concentration
Hydroquinones analysis
Hydroquinones chemistry
Materials Testing
Methacrylates analysis
Methacrylates chemistry
Methylmethacrylate analysis
Methylmethacrylate chemistry
Organic Chemicals analysis
Organic Chemicals chemistry
Phenols analysis
Polyethylene Glycols analysis
Polyethylene Glycols chemistry
Polymethacrylic Acids analysis
Polymethacrylic Acids chemistry
Silicon Dioxide analysis
Spectrometry, Fluorescence
Time Factors
Zirconium analysis
Acrylates chemistry
Composite Resins chemistry
Phenols chemistry
Silicon Dioxide chemistry
Zirconium chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 0909-8836
- Volume :
- 112
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- European journal of oral sciences
- Publication Type :
- Academic Journal
- Accession number :
- 15560837
- Full Text :
- https://doi.org/10.1111/j.1600-0722.2004.00164.x