@article{oai:niigata-u.repo.nii.ac.jp:00025413,
 author = {五島, 秀樹 and 清水, 武 and 川原, 理絵 and 野池, 淳一 and 植松, 美由紀 and 細尾, 麻衣 and 横林, 敏夫},
 issue = {2},
 journal = {新潟歯学会雑誌, 新潟歯学会雑誌},
 month = {Dec},
 note = {歯内歯は，歯の形成期における発育異常で，歯冠の一部が表層のエナメル質や象牙質とともに歯髄腔内に深く陥入している異常歯である。しかし，歯内歯に歯根嚢胞を伴った症例は少ない。私たちは歯根嚢胞を伴った歯内歯の３例について報告した。上顎側切歯は歯内歯の好発部位である。私たちの症例でも３例中２例が上顎側切歯であった。歯根嚢胞を伴った両側上顎犬歯の１例は極めてまれな症例であった。重積した歯髄と根尖が交通した歯内歯の根管治療は大変困難である。２例に根管治療が施行されていた。しかし，それらの症例では根尖の炎症の消失は認められなかった。私たちの３症例において，X 線所見では歯髄の重積が根尖まで到達していた（Oehler の分類によるとOehler の３級に相当する）。Oehler ３級は抜歯の適応とされている。私たちの３症例は全て歯内歯の抜歯と共に根尖の病巣を摘出した。摘出した組織の病理組織学的所見は全例歯根嚢胞であった。現在のところ経過は良好である。, Dens in dente is a clinically relevant malformation of teeth resulting from an infolding of enamel and dentine into the dental structure during tooth formation. This frequently leads to caries, pulpal and periodontal involvement with necrosis and loss of attachment. However, presence of dens in dente associated with radicular cyst is relatively rare. We reported three cases of dens in dente associated with radicular cyst. The maxillary lateral incisors are most frequent site of occurrence. Our two cases of dens in dente occurred the maxillary lateral incisor. A case of dens in the dente associated with radicular cyst in the bilateral maxillary cuspid is especially rare case. Endodontic treatment of a dens in dente in which the invagination communicates with the periodontal ligament is very difficult. Pulpectomy was performed the root in two cases. But they were not cured of apical periodontitis. Radiographic findings revealed that the invagination communicated with the periodontal ligament (type III, according to Oehler' classification) in our cases. Treatment of the dens in dente at Oehler' classification Type III is necessity for the extraction of the tooth. In our three cases, we extracted the dens in dente with the apical lesion. They were diagnosed the radicular cyst at histopathological examination in our three cases. There has been no evidence of recurrence in all case.},
 pages = {99--106},
 title = {歯根嚢胞を伴った歯内歯の３例},
 volume = {41},
 year = {2011}
}