Miniscrew Installation Area and Condition on Maxillary Palatal Side

상악구개측 미니스크류 식립위치 및 조건

  • Lee, Ki-Yeon (Department of Orthodontics, School of Dentistry, Dankook University) ;
  • Lee, Jin-Woo (Department of Orthodontics, School of Dentistry, Dankook University)
  • 이기연 (단국대학교 치과대학부속 치과병원 교정학교실) ;
  • 이진우 (단국대학교 치과대학부속 치과병원 교정학교실)
  • Received : 2009.02.10
  • Accepted : 2009.03.25
  • Published : 2009.03.31

Abstract

Anchorage control is important in orthodontic treatment. Recently miniscrew is widly used as maximum anchorage in orthodontic treatment, and then it is important to install miniscrew safely without damaging adjacent anatomic structure. In a view of Miniscrew's stability, maxilla is unfavorable than mandible, and moreover maxillary soft buccal bone has disadvantage on stability. so palatal area comes into notice for installation area. We measured distance between palatal roots and bone thickness at midpalatal area using 3D computed tomography, and have found following results. 1. On the comparison of distance between palatal roots, the distance between 2nd premolar and 1st molar was significantly longest and the distance between premolars was significantly shortest. 2. Going toward lateral area from midpalatal suture and posterior area from zero point, bone thickness significantly became shorter and shorter. And 5.0mm palatal sagittal plane has more significance decrease of bone thickness than 2.5mm palatal sagittal plane. According to these results, we can conclude that the palatal installation of miniscrew between 2nd premolar and 1st molar is safest. And it is more safe that comes closer to midpalatal suture and to anterior area in regard to incisive canal.

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