- 著者
- 反町 香子 北島 佳代子 川崎 孝一
- 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.26, no.2, pp.119-123, 2005 (Released:2018-02-28)
- 参考文献数
- 22
Abstract : There are three roots : the mesiobuccal, the distobuccal, and the palatal (lingual) in the maxillary first and second molars. However, these teeth seldom show malformation of crown or roots. Dental radiographs may reveal variations with two separate palatal roots, each of which has its own canal. The practitioner should be aware of variations in the root canal system. This paper reports the case of a 47-year old man in whom a second maxillary molar with two palatal roots was found. A radiograph of the tooth showed a large radiolucency extending to the apex related to severe periodontal disease. The extracted tooth was evaluated macroscopically, radiographically and by using micro-CT. The tooth had two widely divergent palatal roots that were long. The buccal separate roots were shorter and were parallel. A well-defined enamel projection extended into the furcation proper of the two separate palatal roots on the lingual side of the tooth. A large accessory Carabelli cusp was located on the mesiopalatine cusp of the tooth. The cusp had its own root with pulp canal which lay mesial to the palatal root. The Carabelli cusp and splitting of palatal root were unilateral in the maxillary left second molar.
1 0 0 0 OA 歯根未完成歯の歯内療法の考え方
- 著者
- 五十嵐 勝 北島 佳代子
- 出版者
- 特定非営利活動法人 日本歯科保存学会
- 雑誌
- 日本歯科保存学雑誌 (ISSN:03872343)
- 巻号頁・発行日
- vol.60, no.4, pp.191-196, 2017 (Released:2017-08-31)
- 参考文献数
- 33
1 0 0 0 OA 根管治療中の器具誤飲症例からの考察
- 著者
- 角竹 功次 吉岡 隆知 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.36, no.3, pp.126-129, 2015 (Released:2017-09-30)
- 参考文献数
- 20
Abstract : We experienced a case of accidental ingestion of a root canal instrument. At first, surgical extraction was suggested by a medical doctor, however, the therapeutic strategy was changed upon presentation of a previously published paper. After ingesting fibrous foods, the patient excreted the instrument naturally on the seventh day. The maintenance of guidelines on accidental ingestion would enable treatment policies to be shared with other medical departments.
- 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
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.