When is it necessary to replace a filling?

Cracked or fallen out filling: Fillings can crack, chip or fall out completely, creating a place where bacteria can accumulate and new tooth decay can develop.

Damage to the tooth around the filling: If new tooth decay develops around an existing filling.

Separation of the filling from the tooth: Sometimes a small gap (microscopic leak) can develop between the tooth and the filling, where bacteria can accumulate and cause decay.

Wear and tear of the filling: Over time, fillings can wear down, especially those on the chewing surfaces of teeth that are exposed to constant pressure and friction.

Aesthetic reasons: Old amalgam fillings can darken or discolour the surrounding dental tissue over time, which may lead some people to decide to replace them with more aesthetic materials such as composite or ceramic.