不規則型内部吸収歯の診断と治療におけるコーンビームCTの有用性

抄録

Abstract : In the present study, we report the usefulness of cone-beam computed tomography (cone-beam CT) in the diagnosis and treatment of an internal resorption tooth, in which the absorption morphology was irregular.

 The patient was a 34-year-old female who visited our hospital complaining of tenderness of labial gingiva on the maxillary left central incisor. According to clinical findings and cone-beam CT imaging, the case was diagnosed as chronic suppurative apical periodontitis caused by perforation of the root-side surface of irregular-type internal resorption. Based on the position and size of the internal resorption identified by the cone-beam CT, infected root canal treatment was performed on the diseased tooth. Root canal filling was carried out by system B and obtura Ⅱ. Thereafter, the enlarged cavity was restored by means of adhesive resin. Seven years have passed since then, and the results have been satisfactory.

 Unlike circular-type internal resorption, continuity with the root canal is partially limited. In this respect, it is sometimes difficult to differentiate from external resorption even when X-ray photographing may be performed by eccentric projection. In the present study, the use of cone-beam CT proved to be very effective for the diagnosis and treatment of an irregular internal resorption tooth.