アブストラクト（57巻1号：神奈川歯学）

神奈川歯学

Japanese

Title　： 上顎右側犬歯の埋伏と含歯性嚢胞により隣在歯の歯根に湾曲が生じた長期安定症例
Subtitle　： 症例・臨床報告
Authors　： 小野華子, 土門明哉
Authors（kana）　：
Organization　： ドモン矯正歯科
Journal　： 神奈川歯学
Volume　： 57
Number　： 1
Page　： 54-61
Year/Month　： 2022 / 6
Article　： 報告
Publisher　： 神奈川歯科大学学会
Abstract　： 「緒言」 含歯性嚢胞は原因歯を嚢胞腔内に含む歯原性嚢胞のひとつであり, 歯冠の形成が終了したあとに歯原性上皮に嚢胞化が生じたものと考えられている. 顎骨に発生する嚢胞のうち歯根嚢胞が最も多く, 次いで含歯性嚢胞が多い. 埋伏歯が多くみられる部位に発生しやすいとされ, 下顎智歯部や上顎正中部や犬歯など埋伏過剰歯の発生率が高いところが好発部位である. 10～30歳代の比較的若い人に好発し, 中でも10歳代に多い. 含歯性嚢胞内の埋伏歯を牽引した際に原因歯の歯根の吸収や湾曲を観察した報告は多数あるが, 嚢胞によって変形が起きたと思われる隣在歯の歯根を長期的に観察した報告は検索しえた限りみられなかった. われわれは今回, 含歯性嚢胞を伴う埋伏犬歯に対し開窓ならびに牽引を含めた矯正歯科治療を行い, 湾曲した歯根を有する隣在歯についても長期的に観察した症例を経験したので報告する. なお本報告の資料の使用に関して, 患者本人ならびに当時の保護者の承諾は得られている.
Practice　： 歯科学
Keywords　： 含歯性嚢胞, 湾曲根, 長期観察, 開窓牽引

English

Title　： A long-term stable case involving a tooth adjacent to an impacted right maxillary canine with root dilaceration due to a dentigerous cyst
Subtitle　：
Authors　： Hanako ONO, Sayaka DOMON
Authors（kana）　：
Organization　： Domon Orthodontic Clinic
Journal　： Kanagawa Shigaku
Volume　： 57
Number　： 1
Page　： 54-61
Year/Month　： 2022 / 6
Article　： Report
Publisher　： Kanagawa Odontological Society
Abstract　： [Abstract] In this report, we present a case of a dentigerous cyst with root dilaceration of an adjacent tooth and its orthodontic treatment, including surgical fenestration. A 9-year-old female presented with a chief complaint of rotation of the right upper central incisor. She had a history of an accidental hit to her upper deciduous incisors during primary dentition, but received no treatment. She was diagnosed with Angle Class II malocclusion with incisors crowding. A cervical headgear was applied during the first 14 months to gain eruption space for the impacted right upper canine. Spontaneous eruption of the impacted canine was not noticed radiographically. A lingual arch was applied for orthodontic traction after surgical fenestration during the next 9 months. After the eruption of the canine, the lingual arch was replaced with a 0.022 pre-adjusted Edgewise appliance, worn in the next 10 months, to obtain a favorable occlusion without extracting permanent teeth. Not only was the impacted canine successfully moved into adequate position with preserved pulpal vitality and healthy periodontal tissue, but all of the teeth had also settled into a proper functional occlusion with the overbite and overjet nearly ideal. Removable and fixed appliances were applied to maintain the good occlusion after removing the pre-adjusted Edgewise appliance. There were no problems observed regarding both the right upper canine and the adjacent lateral incisor, and the occlusion was still stable with excellent facial esthetics even after 14 years of follow-up. In conclusion, this was a very rare case of a tooth with root dilaceration adjacent to a dentigerous cyst with very satisfactory results in the long term.
Practice　： Dentistry
Keywords　：