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Dental fillings are used to treat damaged or worn teeth and can be made of amalgam that contains mercury, silver and tin. This substance is used because of its strength, especially in the back teeth that are under a lot of pressure during chewing. Modern amalgam has low levels of mercury and is considered safe for most people.

Alternate materials for fillings that are similar in colour to teeth do not contain mercury but these are not as strong as amalgam. You can replace your amalgam fillings with this material, but it might not last as long, especially in your back teeth. Replacing fillings can also be expensive. Speak with your dentist about your options.

Some people are advised to avoid getting new amalgam fillings and to avoid having existing amalgam removed or replaced if possible including:
pregnant women – mercury may cross the placenta and enter the bloodstream of the unborn baby
women who are breastfeeding – mercury may be passed to the baby through breastmilk
children – growing and developing teeth are more sensitive to the effects of any chemical substances in the environment, including mercury
people with kidney disease – high levels of mercury exposure can affect the kidneys, so exposure to mercury should be minimised.
While there is currently no scientific evidence directly linking amalgam with either ill health or birth defects, these recommendations have been made for precautionary reasons.

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