Abstract
Supernumerary teeth, a developmental anomaly, are often encountered in the clinic of pediatric dentistry. We therefore investigated children who visited our department of pediatric dentistry, Chiba Hospital, Tokyo Dental College and showed supernumerary teeth at the first examination.
Between January 1992 and December 2001,8,518 new patients visited our department of pediatric dentistry. Of these children,93 who revealed supernumerary teeth (125 teeth) at the first examination were entered into this study. The investigation items were: the history until the first examination, gender, age at the first examination, the number of supernumerary teeth, their locations, eruption state, the direction of the crown in impacted teeth, X-ray findings, and the dentition/occlusion state and management methods.
Of the 93 children,69 (74.2%) were males and 24 (25.8%) were females. The age at the first examination was most frequently 7 years. Supernumerary teeth were located in the maxillary incisor area in 92 children (98.9%) and in the mandibular incior area in the other. Of the 125 supernumerary teeth,48 (38.4%) had been erupted, and 77 (61.6%) were impacted. At the first examination, there were dentition/occlusion abnormalities that were considered to be to supernumerary teeth in 48 children (51.6%).
We will continue follow-up investigation of cases of supernumerary teeth and more detailed evaluation of their status for the appropriate decision of treatment principles.
