Treatment for a dentigerous cyst involves cyst resection and removal of the embedded tooth, or marsupialization, to guide the embedded tooth to its original position. Here, we report the case of a 7-year-old boy with multiple impacted anterior teeth associated with impacted supernumerary teeth and a dentigerous cyst. Under general anesthesia, an impacted supernumerary tooth was extracted, and marsupialization was performed for the dentigerous cyst. At five months postoperatively, the maxillary left lateral incisor erupted into the oral cavity. At two years and eight months postoperatively, the maxillary left lateral central incisor erupted into the oral cavity. Orthodontic treatment was then initiated and brackets were worn for 18 months. At the time of bracket removal, panoramic radiographic images showed root resorption of the maxillary left central incisor. Gingival recession of the maxillary left lateral central incisor was also observed. However, root formation of the maxillary left lateral incisor and canine, which were compressed due to the cyst at the time of the initial examination, was unaffected. For young patients with multiple impacted teeth, as in this reported case, performing marsupialization while considering the burden on the patient was shown to be effective.
