Scientific update on nanoparticles in dentistry.

Area of Science:

• Dental Materials Science
• Nanotechnology
• Occupational Health

Background:

• Nanoparticles (1-100 nm) are ubiquitous in nature and daily products.
• In dentistry, nanoparticles are incorporated into materials or generated as by-products.
• Potential adverse health effects, particularly on the lungs, are a growing concern.

Purpose of the Study:

• To review nanoparticle exposure risks in dental settings.
• To identify sources of nanoparticle generation during dental procedures.
• To assess current risk levels and recommend mitigation strategies.

Main Methods:

• Review of existing literature on nanoparticle occurrence and effects in dentistry.
• Analysis of nanoparticle generation during intra-oral procedures (grinding, polishing, wear).
• Evaluation of regulatory measures and exposure reduction techniques.

Main Results:

• Nanoparticles are generated during intra-oral grinding, polishing, material wear, and implant release.
• Legal regulations exist for dental laboratories; dental practice exposure is primarily from intra-oral procedures.
• Worst-case calculations indicate a low additional risk, but data gaps exist for environmental impact and vulnerable groups.

Conclusions:

• Further research is essential, particularly concerning vulnerable patient groups (e.g., those with asthma or COPD).
• Environmental risk assessment is currently not feasible due to insufficient data.
• Exposure reduction strategies include minimizing abrasive processes, using water spray, and ensuring adequate ventilation.