Abstract
Kampo medicine has a long experience and actual performance over a long period of history. The first oriental medicine was approved by Japanese national health insurance in 1976, and 147 kinds of oriental medicine are currently approved by the National Health Insurance Drug Price. Those of 7 kinds of Kampo medicine were approved by Japan Dental Association of “National Health Insurance Drug Price Standard related with dental treatment” on April 2012. It has been reported that approximately 70 to 80％ of doctors has an experience to use oriental medicine in a clinical site. Meanwhile, oriental medicine was used at more than 85％ of medical facilities in a survey of Kampo medicine usage at oral surgery clinics in all Japanese Dental University hospital and Medical University hospital. However, only a few Kampo medicine was used at general dental clinics. Establishment of the evidence of oriental medical treatment in dental lesions is one of the solution of popularizing a treatment of Kampo medicine in oral surgery. Hence, efficacy of Kampo medicine which was approved by the new drug standard since 1986 was evaluated from the aspect of Evidence-based medicine（EBM）.
