Abstract
The dentigerous cyst is one of the most prevalent types of odontogenic cysts and causes an impaction of the tooth concerned and a dislocation of the adjacent teeth.
A-9-year old Japanese boy, whose maxillary central incisors had not yet erupted, was referred to Osaka University Dental Hospital. Radiographic examination showed a circular, well-defined and unilocular radiolucent area surrounding the crown of the maxillary left central incisor. The right central incisor was found to be displaced horizontally.
After marsupialization, both central incisors erupted naturally at the palatal side of the maxilla. These teeth were aligned with the normal dental arch by the direct-bonding system. However, the maxillary left canine which had erupted between the left central incisor and lateral incisor, was aligned transpositionally between them.3 years and 4 months after marsupialization, the dentigerous cyst had healed completely and good occlusion was established.
