A total of 290 mesiodens were examined in 242 patients, and their positions were measured using cone-beam computed tomography images. Finally, 259 mesiodens were analyzed after excluding mesiodens in horizontal directions and/or in buccal side orientation.
In normal directions, the distance from the alveolar crest and maxillary bone surface to mesioden did not change with age and Nolla's classification, but that from the root apex of the developing incisor was decreased. Conversely, mesiodens in inverted directions tended to be located deeper, higher in maxillae and closer to the root apex of the incisor with age and Nolla's classification. The position of mesiodens in inverted direction showed statistic correlational with age and Nolla's classification. Furthermore, we suggest a radar chart for the diagnosis and the speculation to the position of mesiodens at present and future, objectively.
Our results will be helpful when deciding on the timing of mesioden extraction with minimum stress and risk for children.