Filling a tooth is not invasive surgery, but it does need to be taken seriously. If you have gone through teeth filling, that means you have had a cavity at least once in your life. Dental Cavity Filling helps relieve the decayed part of the tooth and replace it with your choice of filling material to help conserve the rest of the tooth. A dental filling is also used to help repair broken or cracked teeth or teeth that have natural wear and tear. If you have severe tooth decay go for Emergency Dental Services.