Dental amalgam fillings contain elemental mercury, a metal that has been used in restorative dentistry for over 200 years. While many patients have amalgam fillings without immediate problems, questions are often raised about the long-term health implications of low-level mercury exposure.
Understanding the risks of mercury fillings requires a balanced review of scientific evidence, regulatory guidance, and individual patient factors.
Where patients choose replacement, treatment can be carried out using the SMART amalgam removal protocol.
What are mercury (amalgam) fillings made of?
Dental amalgam is approximately 50% elemental mercury, combined with silver, tin and copper to create a durable filling material.
Although set amalgam is structurally stable, small amounts of mercury vapour are released during chewing, brushing, grinding or removal. All regulatory agencies acknowledge this exposure but some consider it safe for most individuals.
However, biological dentistry evaluates not only structural safety, but also cumulative biological burden.
Are mercury fillings safe?
Many regulatory bodies state that dental amalgam is safe for the general population. However, the material is now banned in 43 countries including the whole of the EU, and precautionary restrictions now exist in the UK that prohibit its use in the cases of:
- Pregnant women
- Children under 15
- Individuals with kidney impairment
- Those with known mercury sensitivity
The shift reflects evolving public health policy rather than evidence of widespread acute harm.
Safety, therefore, may depend on:
- Individual patient profile and sensitivity
- Number of fillings
- Overall toxic exposure load
- Medical history
Potential health concerns associated with mercury fillings
Scientific debate continues regarding:
- The effects of chronic low-level mercury vapour exposure
- Potential neurological sensitivity
- Immune response variations
- The effects of bioaccumulation over time
High-dose mercury exposure is of course toxic. The present debate concerns whether long-term low-dose exposure from dental amalgam contributes meaningfully to systemic health burden.
Some patients report symptoms they associate with amalgam exposure. Others remain asymptomatic.
For this reason, decisions should be individualised.
Is it safe to remove mercury fillings?
Removal of amalgam fillings requires careful consideration. Certainly, removal without protective protocols can temporarily increase mercury exposure.
For this reason, safe removal techniques are essential.
Structured protocols such as the SMART (Safe Mercury Amalgam Removal Technique) introduce enhanced protective measures designed to reduce vapour and particulate (amalgam dust) exposure during treatment.
These measures include:
• Rubber dam isolation
• High-volume evacuation
• Sectioning of restorations rather than bulk drilling
• Air filtration systems
• Protective barriers
Patients considering amalgam replacement should ensure that appropriate safety procedures are used.
Where patients choose replacement, removal should be carried out using a recognised SMART amalgam removal protocol.
When should mercury fillings be replaced?
Mercury amalgam does not bond to teeth and replacement may be appropriate where:
• Fillings are fractured or failing
• Secondary decay is present
• Cracks have developed in surrounding tooth structure
• Comprehensive restorative treatment is planned
• A patient prefers a mercury-free approach
Each case should be assessed individually, balancing clinical findings with patient preference.
Safe mercury filling removal in the UK
For patients who decide to replace amalgam restorations, structured removal using enhanced protective protocols is important.
At The Clinic – Mercury Removal Centre in Brighton, we provide SMART protocol amalgam removal for patients travelling from across the UK. Our approach combines biological principles with advanced restorative planning to ensure both safety and long-term structural integrity.
Safe amalgam removal in the UK
If you would like to discuss whether amalgam replacement is appropriate in your case, we offer structured consultation and clinical assessment.
As this Guardian article points out, mercury amalgam is presently banned in 43 countries, including the EU, but not in the UK. It is, however, only a matter of time.
Frequently Asked Questions about mercury fillings
Are mercury fillings safe?
Dental amalgam has been used for over 200 years and is considered safe for the general population by many regulatory bodies. However, amalgam contains elemental mercury, and small amounts of mercury vapour are released all the time. Some countries have introduced precautionary restrictions for children and pregnant women, many others have banned the material completely. Decisions regarding replacement should be based on individual assessment and preference.
Do mercury fillings release mercury vapour?
Yes. Scientific studies confirm that small amounts of mercury vapour can be released from amalgam fillings, particularly during chewing, grinding or removal. For most individuals, exposure levels are considered low. The clinical significance of long-term low-level exposure remains debated.
Should I remove my mercury fillings?
Stable amalgam fillings do not always require removal for functional reasons. Replacement may be appropriate if a filling is failing, cracked, or associated with decay. Some patients also choose removal as part of a mercury-free or biological dental approach. Removal should always be carried out using structured protective protocols.
Is it safe to remove mercury fillings?
When performed without protective measures, removal temporarily increases mercury exposure. For this reason, protective techniques such as the SMART protocol are recommended to minimise vapour and particulate release during treatment.
What is SMART amalgam removal?
SMART stands for Safe Mercury Amalgam Removal Technique. It is a recognised protocol that uses enhanced protective measures such as a separate oxygen supply, rubber dam isolation, high-volume suction, air filtration and sectioning techniques to reduce exposure during removal.