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Treatments · 5 September 2026

Understanding Dental Fillings

Why fillings are needed, how they are placed and how to look after a filled tooth.

Fillings are one of the most common dental treatments in the world. They repair teeth that have been damaged by decay or small breaks and stop the damage from getting worse.

Understanding Dental Fillings

How a cavity forms

Bacteria in plaque turn sugars into acids. The acids slowly dissolve minerals from the tooth enamel. If the process continues, a hole, or cavity, forms.

Why a filling is recommended

A cavity does not heal on its own and will keep growing. A filling removes the decayed part of the tooth and seals the space so that the tooth is strong and protected again.

What happens during the treatment

The area is usually numbed. The dentist removes the decay, cleans the cavity and places the filling material, then shapes it so that your bite feels natural.

Looking after a filled tooth

Brush twice daily with fluoride toothpaste, clean between your teeth and avoid biting very hard objects. Attend your check-ups so that fillings can be monitored.

When to call the dentist

Contact the clinic if the filling feels high, if you have lasting pain, or if a filling cracks or comes out.

This article is general information, not a diagnosis. If you have pain or a concern about your teeth, please see a dentist.

Frequently asked questions

Can a filling fall out?

Sometimes, especially if the tooth is under pressure or decay returns beneath it. If it happens, contact the clinic.

Why does my filled tooth feel sensitive?

Mild sensitivity after a filling is common and usually settles. If it lasts or gets worse, tell your dentist.

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