Periodic examinations are helpful to identify common dental health concerns before they become a bigger issue. Often procedures like root canals, crowns, or extractions can be prevented if they are identified early. Also with periodic exams comes regular cleanings which remove hard deposits (tatre) from the teeth near or under the gum line. This helps to prevent gingivitis and periodontal disease from forming. Regular cleanings and examinations are the best way to prevent most common forms of dental disorders.
Dental exams are part of any regular dental care routine. It is recommended to get a dental exam twice a year unless you are suffering from periodontal disease or if you are suffering from diabetes, in which case you may be prone to periodontal diseases and your dentist may recommend more frequent cleanings and exams.