The SMART Amalgam Removal Protocol Explained

What the SMART protocol is

SMART stands for the Safe Mercury Amalgam Removal Technique. It is a set of recommendations created by the International Academy of Oral Medicine and Toxicology, known as the IAOMT, for taking out mercury amalgam fillings with as little mercury exposure as possible. The IAOMT renamed its recommendations SMART in 2016 and last updated them in 2019, and it offers a certification course so dentists can train in the technique.

Why extra precautions matter during removal

A traditional silver filling is roughly half mercury. Drilling into that filling releases mercury vapor and fine particles, and the amount released goes up during removal. The protective steps below are designed to capture that vapor and those particles before they reach your lungs, your dental team, or the wastewater leaving the office.

What happens during a SMART removal

A dentist following the protocol will typically use these measures together, since it is the combination that lowers exposure.

1. 1A pre rinse. You rinse and swallow a slurry of activated charcoal, chlorella, or a similar binder before the work begins, unless you decline or it is not appropriate for you.
2. 2A rubber dam. A non latex nitrile dam is sealed around the tooth so particles and vapor stay out of your mouth and airway, with a saliva ejector placed under it.
3. 3Clean air to breathe. Air or oxygen is delivered through a nasal mask so you are not breathing the air right next to the tooth.
4. 4Suction at the source. A dedicated oral aerosol vacuum sits close to the tooth alongside high volume suction, capturing vapor and particles as they are created.
5. 5Sectioning, not grinding. The filling is cut into chunks and lifted out in large pieces rather than ground away, with plenty of water and cooling to limit the vapor released.
6. 6Room air filtration and waste capture. A high volume air filter with HEPA and activated carbon runs throughout, protective barriers and gowns are used, and an amalgam separator captures the mercury waste for proper disposal.

What to expect as a patient

Most practices start with a consultation and a plan, and many choose to remove only a few fillings per visit to keep exposure low. Once a filling is out, it is usually replaced with a biocompatible, mercury free material such as composite resin. Your dentist will then check the new restoration and follow up on healing.

How to check that a dentist actually follows it

SMART is a set of recommendations rather than a legal requirement, so it is worth confirming before you book. Ask whether the office uses a rubber dam, suction held at the tooth, supplemental air for you to breathe, room air filtration, and a charcoal rinse. You can also ask whether the dentist has completed IAOMT SMART certification.

An honest note on the evidence

The steps in SMART are logical and they measurably reduce the mercury vapor released during a removal. At the same time, a clear long term health benefit compared with careful standard removal has not been proven in large clinical trials. Whether to remove stable fillings that are not causing problems is a personal decision, and it is best discussed with a qualified dentist who can look at your specific situation.

This article is educational information only and is not medical or dental advice. Always consult a qualified healthcare professional about your own care.