著者

新井 恭子 赤松 俊嗣 長谷川 有紀 北島 佳代子 五十嵐 勝

出版者

一般社団法人 日本歯内療法学会

雑誌

日本歯内療法学会雑誌 (ISSN:13478672)

巻号頁・発行日

vol.30, no.1, pp.30-35, 2009 (Released:2017-11-30)

参考文献数

30

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Abstract : This case report describes the root development following apexification of an immature tooth. The patient was a 9-year-old girl. The upper right central incisor suffered apical periodontitis with gingival abscess after rapid orthodontic treatment with a removable appliance. The root canal was cleaned by both biomechanical preparation and biochemical preparation with 6% sodium hypochlorite and 3% hydrogen peroxide. After disinfection of the root canal, calcium hydroxide paste was applied. The medicaments were replaced several times during the follow-up term. After five years and six months, radiographic images showed disappearance of the apical lesion and continuous root development. The shape of the root-end was an irregular, sharp-pointed outline with narrow canal. Following confirmation of the calcified apical barrier at the root end by palpation with a K-file, the lateral condensation procedure with a custom cone and canal sealer was done. This report suggests that root development after apexification occurs because of the existence of apical vital tissue even if the tooth is a non-vital tooth with open apex.