Nonextraction treatment of Class II division 2 in an adult patient using microimplant anchorage (MIA)
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초록
상악 측절치와 견치의 치근 사이에 식립한 microimplant를 이용하여 상악 전치의 함입과 설측으로의 치근 이동을 얻을 수가 있었으며, 상악 견치와 제1소구치의 치근 사이에 식립한 microimplant를 이용하여 과맹출된 상악 견치를 함입시켰다. 또한 상악 제1, 2대구치의 치근 사이에 식립한 microimplant를 이용하여 상악 견치 및 구치의 후방 이동 및 상악 전치의 후방 견인을 시행하였다. Anterior bite plane과 intrusion arch, 그리고 II급 고무 등과 같은 전통적인 방법을 사용하여 하악 전치의 합입 및 구치부의 정출을 얻을 수가 있었으며, 과개 교합 및 상악 전치의 설측 경사가 해소 되면서 하악골이 전방으로 약간 이동하였다. 이와 같이, MIA는 II급 2류 부정교합 환자에 있어서 II급 견치 및 구치 관계 그리고 과개 교합을 동시에 해소 하는데 절대적인 고정원을 제공하였다.
Abstract
Maxillary anterior teeth were intruded and lingually root torqued with two maxillary anterior microimplants between the lateral incisors and canines. Overerupted maxillary canines were intruded with two other microimplants between the maxillary canines and first premolars. Maxillary posterior teeth and canines were distalized, then the maxillary incisors were retracted with two maxillary posterior microimplants between the first and second molars. The mandibular anterior teeth were intruded and the mandibular posterior teeth were extruded with conventional method such as anterior bite plane, intrusion arch and Class II elastics. The mandible moved slightly forward after the correction of deep bite and retroclination of the upper incisors. Consequently, microimplant anchorage (MIA) provided absolute anchorage for simultaneous correction of Class II canine and molar relationships and deep overbite.
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