斬新な "3Dオルソ "で3D-Otho "コンセプトで美しいアジア人顔を実現

Using the Novel "3D-Ortho" Concept to Achieve a Beautiful Asian Face.

抄録

アーチフォーム拡大による頬側通路の縮小と、抜歯スペースを利用した前歯の後方移動によるエステティックライン（E-line）の調和という、相反する矯正結果を求める成人患者が一般的になってきた。そこで筆者は、上記の相反する結果を達成し、顔貌の美しさの要求を解決するために、新しい「3D-Ortho」コンセプトを考案し、実施した。患者は23歳の女性で、口唇突出症であった。著者は3D-Orthoコンセプトを用いて矯正治療を行った。上顎骨格拡張装置と上顎第一小臼歯の抜歯を行い、頬側にマルチブラケット装置を装着し、II級臼歯関係を完全に仕上げてMx1をA-pogonion line（APo）点まで減少させた。術後、鼻唇角は83.4°から93.1°に増加し、E-line-上唇距離は2.6mmから-1.1mmに減少し、Mx1-Apo距離は13.6mmから7.5mmに減少し、下顎第一大臼歯頬側近心犬歯間距離は41.2mmから45.2mmへ、下顎第一大臼歯切歯の傾斜は右側で21°から11°へ、左側で21°から9°へ、頬側通路の改善が観察され、これらのパラメータに有意な改善が観察された。したがって、この新しい矯正治療法は、咬合の安定と顔貌の美しさの調和を取り入れたアジア人特有の問題の解決に良好な結果を示した。

It has become more common for adult patients to seek conflicting orthodontic results, such as the reduction of the buccal corridors by arch form expansion and achieving esthetic-line (E-line) harmony by moving the anterior teeth backward using the extraction space. Therefore, the author devised and implemented the novel "3D-Ortho" concept to achieve the abovementioned conflicting results and solve the requirement of facial beauty. The patient was a 23-year-old female with mouth protrusion. The author used the 3D-Ortho concept to provide orthodontic treatment. A maxillary skeletal expander appliance and the extraction of the maxillary first premolar were performed, and a multi-bracket device was placed on the buccal aspect to decrease Mx1 to point A-pogonion line (APo) by full class II molar relationship finishing. Postoperatively, the nasolabial angle was increased from 83.4° to 93.1°, the E-line to upper lip distance decreased from 2.6 mm to -1.1 mm, the Mx1 to Apo distance decreased from 13.6 mm to 7.5 mm, the distance between the mesial buccal cusp of the mandibular first molars increased from 41.2 mm to 45.2 mm, the inclination of the mandibular first molar incisor changed from 21° to 11° on the right side and from 21° to 9° on the left side, and the improvement of the buccal corridors was observed; thus, significant improvement was observed in these parameters. Therefore, the novel orthodontic treatment method showed good results in solving problems unique to Asians, incorporating occlusal stability and facial beauty harmony.