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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.
Overall, the high school years create the foundation for the 13 or more years of study needed to become a general surgeon. The 13 years of medical study typically includes four years of undergraduate studies, four years of doctoral degree studies and five years of residency.