Language：Japanese   Publisher：九州矯正歯科学会  

唇顎口蓋裂を伴う患者においては、歯槽骨の欠損、歯の傾斜・捻転や形態異常、歯数の異常などが高頻度に発現する。歯の欠損数や顎裂部の大きさによっては、矯正歯科治療単独による咬合改善は困難なことがある。両側性不完全唇顎口蓋裂を伴う患者に対して、治療期間や隣在歯の負担を考慮して垂直的顎間関係の改善のために顎間骨整位術と顎裂部への骨移植を行い、上顎左側側切歯欠如部に便宜抜去した上顎左側第二小臼歯の移植を行い、良好な咬合を獲得したので報告する。(著者抄録)

Language：English   Publishing type：Research paper (scientific journal)   Publisher：E H ANGLE EDUCATION RESEARCH FOUNDATION, INC  

Objective: To evaluate the relationship between external apical root resorption (EARR) of the maxillary central incisors (U1), horizontal orthodontic tooth movement, and quantity of grafted bone in subjects with unilateral cleft lip and palate (UCLP) over an average duration of 8 years.
Materials and Methods: Thirty subjects with UCLP were evaluated for EARR of U1 after edgewise treatment (T2). The teeth were classified as having no EARR, moderate EARR (combined into "no/moderate" EARR), or severe EARR. Frontal cephalometric radiographs acquired at eruption of U1 (T0), less than 6 months before secondary alveolar bone grafting (T1), and T2 were evaluated to determine the horizontal inclination (U1-axis angle) and distance of the root apex from the median line (U1-root-VL distance). On the cleft side, the quantities of grafted bone at less than 12 months postsecondary bone grafting and at T2 were evaluated using the alveolar bone graft (ABG) scale.
Results: Cleft-adjacent teeth exhibited more severe EARR than did teeth on the noncleft side. The cleft side exhibited greater changes in U1-axis angle and U1-root VL distance between T0 and T2 than did the noncleft side. On the cleft side, the ABG score at T2 in the severe EARR group was significantly lower than that in the no/moderate EARR group. These measurements were correlated with EARR grade.
Conclusions: Cleft-adjacent U1 exhibited more severe EARR than did the U1 on the noncleft side, which might be associated with orthodontic treatment-induced changes in horizontal inclination and root apex movement. On the cleft side, severity of EARR may be correlated with the success of ABG.

DOI： 10.2319/031317-189.1

Web of Science

Scopus

PubMed

Language：English   Publishing type：Research paper (scientific journal)   Publisher：E H ANGLE EDUCATION RESEARCH FOUNDATION, INC  

Objectives: To measure the root lengths of maxillary central incisors (U1) and evaluate the relationship among U1 root length, tooth movement, and type of treatment appliance in patients with unilateral cleft lip and palate over a long-term follow-up period.
Materials and Methods: Occlusal radiographs of 30 patients with unilateral cleft lip and palate, acquired less than 6 months before secondary alveolar bone grafting (SBG, T1) and after edgewise treatment (T2), were measured for U1 root length (R1 and R2, root lengths at T1 and T2, respectively). Frontal and lateral cephalometric radiographs acquired at eruption of U1 (T0), T1, and T2 were evaluated to determine the inclination and position of U1.
Results: The average values of R1 and R2 on the cleft side were significantly lower than those on the noncleft side. Frontal cephalometric analysis revealed that the horizontal distance of the root apex from the median vertical line at T0 on the cleft side was significantly smaller than that on the noncleft side and was correlated with short U1 root length on the cleft side. On the other hand, R1 in patients treated with maxillary protraction appliances between T0 and T1 was significantly shorter than that in patients without maxillary protraction appliances. However, none of the changes in cephalometric measurements were correlated with root length.
Conclusions: In patients with unilateral cleft lip and palate, the short root length of cleft-adjacent central incisors might be associated with the horizontal position of the root apex. In addition, orthodontic treatment with a maxillary protraction appliance before secondary alveolar bone grafting might be associated with short U1 root length.

DOI： 10.2319/031317-188.1

Web of Science

Scopus

PubMed

Language：Japanese   Publisher：九州矯正歯科学会  

我々は、舌癖を伴う骨格性開咬症例に対し、前歯の挺出を防止しながら、緊密な咬合と側方運動を含む顎口腔機能の改善をすることが出来たので報告する。患者は19歳5ヵ月の女性で、舌癖と前歯部開咬を伴うハイアングル症例と診断した。歯科矯正用アンカースクリューを用いて臼歯を圧下する案とハイプルヘッドギアを用いて臼歯の挺出を防止する案を提示し、患者は後者を選択し、上下顎第一小臼歯の抜去を伴うエッジワイズ装置による治療を行った。その結果、上下顎前歯部の舌側移動によって適切な水平、垂直被蓋が得られ、上下口唇の突出が改善し、側貌の改善を認めた。現在治療後30ヵ月が経過し、良好な顔貌と咬合が維持されている。(著者抄録)

Language：Japanese   Publisher：東京矯正歯科学会  

Language：Japanese   Publisher：南九州歯学会  

口唇裂・口蓋裂は,顔面の形成不全や口腔の機能障害を伴う先天性疾患であり,上顎骨の劣成長や上顎歯列の狭窄を伴う反対咬合,顎裂に隣接した歯の萌出位置の異常を認めるなど,重度の不正咬合を呈することが多い.口唇裂・口蓋裂治療の中でも,矯正歯科治療は長い期間を要する治療である.鹿児島大学病院矯正歯科における乳歯列期および混合歯列期に行う第一期治療では,主に上顎骨の前方成長促進や上顎歯列の拡大,顎裂部骨移植後の顎裂部に隣接する犬歯・側切歯などの萌出誘導もしくは矯正学的歯の移動を行っている.永久歯列期に行う第二期治療では,マルチブラケット装置による最終的な咬合の確立を行うが,上下顎骨の不調和が大きい場合は,外科的矯正治療を選択している.マルチブラケット装置撤去後は,必要に応じて補綴治療を行い,咬合の安定のため長期間の保定を行う.このように,治療が長期間に及ぶことから,患者や保護者の心理状態を把握し,多職種連携を強化したチーム医療を提供することが重要である.鹿児島大学病院矯正歯科では,長期的評価による臨床研究や症例報告を行うことで,治療成績の向上に努めてきた.今回,我々は,鹿児島大学矯正歯科で行っている口唇裂・口蓋裂治療の概要を紹介するとともに,当科で報告してきた臨床研究や症例報告について紹介する.(著者抄録)

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

Language：Japanese   Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

Event date： 2022.5

Venue：鹿児島   Country：Japan  

Event date： 2022.5

Language：Japanese  

Venue：鹿児島   Country：Japan  

Event date： 2022.1

Language：Japanese  

Venue：佐賀  

Event date： 2020.10

Language：English   Presentation type：Oral presentation (general)  

Event date： 2020.10

Language：English   Presentation type：Poster presentation