2016 Volume 54 Issue 4 Pages 499-506
We experienced a case of dentigerous cyst that appeared in the anterior tooth region of the maxillary region during the period of mixed dentition, in which the tooth germs of 3 permanent teeth were impacted by the cyst. Marsupialization was selected for treatment in order to preserve the impacted upper left central incisor, lateral incisor, and canine. A reduction in cyst cavity size was observed at 1 month following surgery and continued, after which the upper left central and lateral incisors erupted at 7 months after the procedure. However, traction was needed because the site of eruption was very low. We used a sectional bracket appliance, trans-palatal arch, and 0.014-inch Ni-Ti archwire for traction. After 1 year 5 months of active treatment, the maxillary left canine erupted naturally over the lateral incisor and a chain-type elastic was used to guide the incisor toward the inside of the dental arch. Following 2 years 10 months of active treatment, crowding and rotation of the maxillary anterior teeth showed improvements, and the appliance was removed. X-ray findings after completing active treatment revealed a favorable outcome, with normal tooth root formation of the maxillary left central incisor, lateral incisor, and canine. When multiple teeth are impacted by a dentigerous cyst, it is important to performance guidance at an early stage, taking into account the effects on growth and development.
