A cavity is a hole or an opening that forms on a tooth as a result of tooth decay. It is caused by the breakdown of the tooth enamel, the hard outer layer of the tooth, due to bacterial activity and poor oral hygiene. Cavities can vary in size and severity and can lead to tooth pain, sensitivity, and possible infection if left untreated. Dental treatment such as fillings or dental sealants is commonly used to repair and prevent cavities.
