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Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
Published on: October 10, 2013
Release of monomers from different core build-up materials
Olga Polydorou1, Mohammad Hammad, Armin König
1Department of Operative Dentistry and Periodontology, University Medical Center Freiburg, Dental School and Hospital, Hugstetter Strasse 55, 79106 Freiburg i. Br., Germany. olga.polydorou@uniklinik-freiburg.de
Summary
Photo-cured composite materials released fewer monomers, suggesting lower toxicological risks compared to chemically and dual-cured options. This study highlights the importance of material selection for patient safety.
Area of Science:
- Dental Materials Science
- Polymer Chemistry
- Biocompatibility Studies
Background:
- Core build-up composites are essential in restorative dentistry.
- Understanding monomer elution is crucial for assessing potential toxicity.
- Degree of conversion impacts material properties and safety.
Purpose of the Study:
- To compare monomer elution from three core build-up composite types: chemically cured, photo-cured, and dual-cured.
- To correlate monomer elution levels with the degree of conversion for each material.
- To evaluate the toxicological implications of monomer release.
Main Methods:
- Fabrication of 30 composite samples (10 per type).
- Analysis of monomer elution (BisGMA, TEGDMA, Bisphenol A) using LC-MS/MS after storage in ethanol.
- Assessment of degree of conversion using FT-IR spectroscopy.
Main Results:
- Significant differences in monomer elution (BisGMA, TEGDMA, Bisphenol A) were observed across the three materials (p<0.0001).
- Chemically cured composites eluted higher amounts of BisGMA and TEGDMA than photo-cured and dual-cured materials.
- Photo-cured materials showed the lowest monomer elution, while chemically cured materials had the lowest degree of conversion.
Conclusions:
- Photo-cured core build-up materials demonstrate reduced monomer elution.
- Lower monomer release suggests potentially decreased toxicological effects.
- Material choice significantly influences monomer elution and potential biocompatibility.
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