Is Replacing Silver Fillings Worth It?

Amalgam is a mixture of metals, mainly silver, tin and copper, bound together with mercury. It has been used in teeth for well over a century. It is strong, tolerant of a wet mouth and cheap, which is why it filled so many back teeth in older adults.

The downsides are that it is dark and visible, that it does not bond to the tooth, so more healthy tooth has to be cut away to hold it, and that many people simply prefer not to have metal in their mouth. A shorter comparison with other materials is in types of dental fillings.

The mainstream position of dental and health authorities is that an intact amalgam filling is safe for most people. A filling gives off a very small amount of mercury vapour, mostly when you chew, and the level is well under the levels linked with harm in current evidence. Removing a sound filling only because it contains mercury is therefore not advised.

Removal has its own costs. The drill has to cut through the filling, which briefly releases more vapour and fine particles than leaving it alone, and it takes out healthy tooth along with the old material. Each replacement also makes the filling slightly bigger, which brings the tooth nearer to needing a crown or a root canal.

A crack in the filling or in the tooth around it. Amalgam can expand and shrink slightly over the years, and an old, large filling in a heavily bitten tooth can split the tooth, so a cracked cusp is a good reason.

New decay at the edge or under the filling, found on examination or X-ray. Sensitivity, food trapping and a rough or open margin are also reasons to look. Our guide on what a cavity in teeth looks like describes how that decay shows up.

Fracture or wear, where the filling has broken, worn or no longer fits the bite. And appearance: if the dark metal bothers you or a grey shadow shows through the tooth, replacement is a reasonable personal choice, as long as you know it takes some tooth with it.

A true allergy to a component of amalgam is rare. When it is confirmed, usually with a lichen-like patch in the mouth next to a filling, replacing it is justified. That is a diagnosis for a dentist or a doctor, not for an internet quiz.

Avoid elective removal of amalgam fillings in pregnancy, since there is no benefit in releasing extra vapour for a cosmetic reason. Urgent dental treatment, such as for pain or infection, is still done, and the dentist chooses materials with that in mind.

Some guidance also advises against placing new amalgam in pregnant women and in children, and in recent years many countries have moved to limit its use. If you are pregnant, breastfeeding, or have kidney disease, tell the dentist and decide the timing together.

Most often a tooth-coloured composite, which bonds to the tooth and removes less of it. Glass ionomer can be used in small areas and near the gum line. When the old filling was large and the remaining tooth is weak, a ceramic inlay or a crown may protect the tooth better than another filling.

The dentist can only judge this once the old filling is out, because the cavity under it is often bigger than it looked on the X-ray. Agree in advance what you would want if the tooth turns out to be weaker than expected.

A good dentist will assess the tooth under the old filling before promising which. The process for the new one is on the tooth fillings page, and the fee depends on the size and material; see the teeth filling cost page for the 2026 Lucknow ranges. A tooth that needs a crown is covered in crowns and bridges.

Ask for a check of each silver filling rather than a blanket replacement. If an X-ray and examination show an intact, well-sealed filling, leaving it is a valid and usually the better choice. If you decide to replace for appearance, do it one tooth at a time and understand the trade-off. Call the clinic to ask how they would assess your fillings.

Keep your old fillings under review instead. A check-up with an X-ray every so often shows whether the edges are still sealed, and an old filling that is replaced at the first sign of trouble costs far less tooth than one left until the tooth breaks.