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Dental schooling to become an oral surgeon will take an additional four years, during which time dental students complete coursework and treat patients in a supervised setting; to become licensed as an oral surgeon, most states require passing a written and practical examination.
6. Decide if you want to specialize. For instance, orthodontics is an additional 3 years, oral surgery another 6.     To become a general dentist after high school the minimum year requirement is an investment of 8 years.