2018 Volume 56 Issue 3 Pages 396-402
An impacted tooth can occur from a variety of causes, while cases of multiple impacted teeth accompanied by focal bony overgrowth are rare. We report here a case of impacted mandibular incisors accompanied by overgrowth of surrounding alveolar tissue in the mixed dentition stage. An 8-year-old boy was referred to our hospital from a general dentist for abnormal swelling of alveolar tissue around the left primary incisors in the mandible. The permanent lower left incisors remained unerupted. Under a clinical diagnosis of dentigerous cyst with retained primary teeth, the lower left primary incisors were immediately extracted, while the lower central incisor erupted naturally at 7 months after surgery. Bone mass around the left incisors showed a progressive increase at around the same time, thus, following consultation with his mother, the lower left incisors were removed along with overgrown bone mass under general anesthesia. The pathological diagnosis was reactive bone augmentation. The cause of bony overgrowth around the lower left incisors in the present case is unknown. Cases of impacted permanent incisors accompanied by uncontrollable bony overgrowth are rare and this report provides important findings regarding eruption disturbance in the mixed dentition stage.
