본 증례는 Angle氏 2급 2류 부정교합 환자로서 Bioprogressive Mechanism을 적용시켜 양호한 결과를 얻었기에 이에 보고하는 바이머 치료결과는 다음과 같다. 1) 주조인 상하악 전치부 crowding을 해소하였다. 2) 구치부 관계는 Angle氏 class Ⅱ에서 class Ⅰ으로 개선되었다. 3) Overbite와 overjet를 기능적으로 해소시킴과 동시에 전치부 torque control에 의한 만족스러운 치축경사도로 개선시켯다. (Photo.5) 4) 치료기간은 1년 11개월이 소모되었다.

A 25 year and 7 month old man patient who had Angle`s classⅡ division 2 malocclusion com-bined with anterior crowding of upper & lower part was treated by bioprogressive mecha-nism. After setting our objectives through the use of V. T. O., we programmed a sequence of mechanics. The possible objectives of treatment in the classⅡ division 2 malocclusion can be listed as follows. 1) Relief of crowding & irregularities. 2) Relief of anterior gingival trauma & correction of interincisal inclination. 3) Correclion of buccal segment relationship. We`d applied the class Ⅱ intermaxillary elastics, Quad helix, utility arch wire and sectional arch wire in order to achieve anticipated objectives. As compared with pre & post treatment cephalogram, the result accomplished by this mecha-nics showed to us that interincisal angle was improved and favorable molar relationship was achieved.