A filling is a dental restoration used to repair a tooth that has been damaged by decay or trauma. It involves removing the decayed or damaged portion of the tooth and filling the space with a durable material such as composite resin. 

Cavities can develop in teeth for a variety of reasons and often begin between the teeth hidden from view. For this reason, it is important to update x-rays every two years to monitor for early signs of tooth decay and review the overall health of your teeth.