The marsupialization technique is a useful method for the treatment of odontogenic cysts, especially in young patients. However, we sometimes have trouble in controlling impacted teeth associated large cysts. We report the case of a large mandibular odontogenic cyst that was treated by marsupialization and tooth traction technique. The patient was a 12-year-old boy with a swelling of the right side of the mandible. Radiographically, the lesion showed a well-defined unilocular radiolucent area, including three impacted teeth. The lesion was marsupialized and the impacted teeth were moved by tooth traction technique. Histologically, the cyst wall was composed of stratified squamous epithelium, with infiltration of inflammatory cells in the subepithelium. In some areas, we found zonal or proliferating rete processes. After marsupialization, the cyst wall showed stratified squamous epithelium. There has been no recurrence, and masticatory function has improved.
