Abstract
We report a case of an impacted mandibular second premolar in the ramus of the mandible.The patient was a female in her thirties who visited the hospital with the main complaint of mandibular pericoronitis. An imaging test revealed that the patient had a horizontally impacted wisdom tooth on the lower left jaw, and an impacted tooth on the distal side thereto. In addition, the second premolar on the same side of the mandible was missing. Under general anesthesia, the horizontally impacted wisdom tooth and the impacted tooth on the distal side were extracted, and an anatomical search on the impacted tooth was conducted. As a result of macroscopic analysis of the occlusal form and the shape of the crown and the root, as well as microfocus CT analysis of the pulp form, the impacted tooth was found to closely resemble the second premolar of the mandible. From the observation that the second premolar on the lower jaw was not in the usual position, and that the impacted tooth closely resembled the second premolar of the mandible, the impacted tooth observed in the mandibular ramus was thought to be the second premolar of the mandible.
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