2022 Volume 60 Issue 3 Pages 122-128
In childhood, supernumerary teeth are often observed in the upper anterior teeth region; those observed in the lower premolar region are relatively rare. Supernumerary teeth in the premolar region develop more slowly than those in the anterior teeth region and are difficult to examine or diagnose. This report presents a case in which a supernumerary tooth was observed in the lower right premolar region.
The patient was found to have a supernumerary tooth-like structure in the premolar region by dental radiography performed for caries treatment at a local dental clinic and was referred to our department.
The patient was 4 years and 8 months at the first examination, the Hellman's dental developmental stage was IIA, and caries that reached the pulp cavity was confirmed in the deciduous molar region.
Panoramic radiography showed a supernumerary tooth-like structure above the crown of the lower right premolar, but the crown was in the formation stage, and details of the premolar and supernumerary tooth were unclear.
We first treated caries in the molar region and decided to periodically follow up, waiting for the development of the premolar, and to take necessary measures during the period of successional replacement.
At the age of 8 years and 8 months, the patient's dental developmental reached stage IIIB. As the roots of the first and second deciduous molars were shown to be resorbed by panoramic radiography, and as details of the supernumerary tooth and adjacent teeth could be evaluated in CBCT images, confirming that the supernumerary tooth was causing eruption disturbance of the premolar, the supernumerary tooth was extracted.
The course after tooth extraction was uneventful, and eruption of the premolar was confirmed 2 months after the procedure.
