Composite cosmetic fillings are typically used to fill teeth that are visible, and the resin is matched to the natural color of the tooth. This allows the filling to blend in so that anyone looking at the patient’s teeth will not notice that the difference. Amalgam cosmetic fillings are used to restore function to the teeth. Large cavities may lead to a number of oral health issues including further decay, infection, and sensitivity or pain when eating. An amalgam filling helps prevent further damage to the tooth.