Dental Amalgam: Uses, Advantages, and Safety Controversies
What is dental amalgam and what is it used for?
Dental amalgam is a restorative material used for fillings in molars and premolars due to its resistance to chewing. It is composed of an alloy of metals in which mercury acts as a binding agent.
It is mainly used in:
✔️ Restorations of posterior teeth with high wear.
✔️ Patients with a high risk of cavities due to its low cost and longevity.
✔️ Restorations in areas with difficult access and humidity, where other materials like resins may not adhere properly.
Advantages of dental amalgam
🔹 Durability and resistance: It can last more than 10-15 years without wearing out.
🔹 Lower cost compared to resins or ceramics.
🔹 Does not require complicated adhesion techniques, facilitating its placement.
🔹 High fracture resistance in large restorations.
Controversy over the safety of dental amalgam
The main debate surrounding amalgam focuses on its mercury content, a metal that can release toxic vapors in minimal amounts.
⚠️ Key points of the debate:
✔️ The WHO and the ADA have indicated that mercury release is negligible and safe for most patients.
✔️ The European Union has banned its use in children under 15 and pregnant women as a precautionary measure.
✔️ In some countries, it has been progressively replaced by composite resins and ceramics.
Alternatives to dental amalgam
🔹 Composite resins: Aesthetic restorations with chemical adhesion, although less resistant in posterior teeth.
🔹 Ceramics: A highly aesthetic and biocompatible option, but more expensive.
🔹 Glass ionomers: Ideal for temporary restorations in teeth with high sensitivity.
Conclusion
Dental amalgam remains a durable and cost-effective option for dental restorations, but its mercury content has led to restrictions in some countries. Although it is still considered safe by health organizations, each patient should consider the alternatives based on their needs.
Legal Notice and Disclaimer
This article is part of ONAK's Medical Terms Dictionary and is for informational purposes. It does not replace consultation with a dentist.
Bibliography
- Ferracane, J. L. "Current trends in dental composites and amalgam." Dent Clin North Am. 2007; 51(3): 669-687. Available at: https://pubmed.ncbi.nlm.nih.gov/17532930/
- Clarkson, T. W., Magos, L., Myers, G. J. "The toxicology of mercury—current exposures and clinical manifestations." N Engl J Med. 2003; 349(18): 1731-1737. Available at: https://pubmed.ncbi.nlm.nih.gov/14585990/
