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Nanoparticle release from dental composites
K L Van Landuyt1, B Hellack, B Van Meerbeek
1KU Leuven BIOMAT, Department of Oral Health Sciences, University of Leuven & Dentistry, University Hospitals Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium.
Acta Biomaterialia
|October 15, 2013
Summary
Dental composites release high concentrations of nanoparticles during dental procedures. This airborne nanoparticle dust, measuring 38-70 nm, may pose risks to dental professionals and patients.
Area of Science:
- Dental Materials Science
- Occupational Health
- Nanotoxicology
Background:
- Dental composites contain up to 60% nanosized filler particles.
- Concerns exist regarding inhalation of nanoparticles by dental personnel and patients during abrasive procedures.
Purpose of the Study:
- To investigate the release of airborne nanoparticles from dental composites during clinical procedures.
- To characterize the size and composition of released composite dust.
Main Methods:
- Exposure measurements of dust in a dental clinic during real work conditions.
- Laboratory analysis of composite dust using electron microscopy and energy dispersive X-ray analysis.
Main Results:
- High peak concentrations of nanoparticles detected in the breathing zones of dentists and patients.
- All tested composites released high concentrations of airborne nanoparticles (>10(6)cm(-3)) with a median diameter of 38-70 nm.
- Airborne particles confirmed to be from composite material, consisting of filler particles, resin, or both.
Conclusions:
- Dental composite manipulation releases significant concentrations of nanoparticles.
- These nanoparticles can be inhaled deeply into the lungs.
- Further toxicological research is recommended despite no significant oxidative reactivity observed.
