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Composites for use in posterior teeth: composition and conversion
Journal of Biomedical Materials Research
|January 1, 1987
Summary
Dental composite composition impacts polymerization conversion. This study analyzed eight posterior and two anterior composites, finding a link between material makeup and methacrylate group conversion for better dental restorations.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
Background:
- Dental composites are widely used restorative materials.
- Understanding their composition and polymerization is crucial for clinical success.
Purpose of the Study:
- To determine the composition of dental composites.
- To analyze the polymerization conversion of dental composites.
- To correlate material composition with conversion rates.
Main Methods:
- Combustion and pycnometric analyses for inorganic filler fractions.
- High-performance liquid chromatography, nuclear magnetic resonance, and gel permeation chromatography for monomer analysis.
- Infrared multiple internal reflection spectroscopy for methacrylate group conversion.
Main Results:
- Quantified weight and volume fractions of inorganic fillers.
- Identified and quantified monomers and oligomers.
- Determined methacrylate group conversion, especially at optimal depths.
- Established a correlation between composite composition and polymerization conversion.
Conclusions:
- The composition of monomers and oligomers in dental composites influences their polymerization conversion.
- This relationship is key to optimizing the performance of dental restorative materials.