부산대학교 도서관

A 9-year-6-month-old boy with an impacted lower first molar visited the Medical and Dental Hospital of Fukuoka Dental College. Radiographic findings showed that impacted first molar was positioned on the inferior edge of the mandible and under the second molar. Moreover, crowding of the upper and lower front teeth was noted, resulting in arch length discrepancy. We performed surgical exposure and a traction technique as therapy, and the impacted first molar became well positioned. In addition, expansion treatment was given, which induced correct dental articulation. We concluded that such treatments in the early stage are important for similar impacted molar cases.