Prevention of dental disease starts at home with good oral hygiene such regular and proper brushing, flossing and sometimes use of mouth rinses, at-home fluoride applications and a healthy and balanced diet. Good preventative treatment continues with your dentist who can promote, restore, and maintain your dental health. Dental health professionals most often look for early signs of periodontal disease, dental decay, and other changes in the soft tissue of the mouth that could lead to oral cancer.