The main thing that people think of when they think of a dental exam is to look for cavities. However, dental exams are useful for many more things, some of which are not even dental related. A dental exam can last a few minutes or last from 20 minutes to an hour. Most people are used to a dental check-up which occurs a couple or a few times a year. A complete oral exam or comprehensive exam, on the other hand, takes much longer and is done every three to five years.

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