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Do the monomers release from the composite resins after artificial aging?
Ugur Tokay1, Alp Erdin Koyuturk, Abdurrahman Aksoy
1Department of Pediatric Dentistry, Faculty of Dentistry, Ishik University, Erbil, Iraq.
Microscopy Research and Technique
|January 30, 2015
Summary
Thermal cycling increases monomer release from dental composites, with additional polymerization potentially reducing residual monomers. Indirect composites may offer better biocompatibility than direct ones.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
Background:
- Dental composites are widely used restorative materials.
- Understanding monomer release under oral conditions is crucial for biocompatibility.
Purpose of the Study:
- To quantify monomer release from three composite types after thermal cycling.
- To evaluate the impact of thermal stress on dental composite degradation.
Main Methods:
- Three composite types (inlay, posterior, micro-hybrid) were prepared into specimens.
- Specimens underwent thermal cycling to simulate oral temperature fluctuations.
- Monomer elution was analyzed using High-Performance Liquid Chromatography (HPLC).
Main Results:
- Urethane dimethacrylate (UDMA) and triethyleneglycol dimethacrylate (TEGDMA) release increased linearly with thermal cycles (P < 0.05).
- Ethoxylated Bis-GMA release from posterior composite showed a cubic relationship with thermal cycles (P < 0.001).
Conclusions:
- Additional polymerization may reduce residual monomer levels in dental composites.
- Indirect composite resins exhibit superior biocompatibility compared to direct composites.
