상악 전치부 견인 시 치아이동에 따른 전방 치조골개조량의 변화에 관한 연구
THE LIMITATION OF ALVEOLAR BONE REMODELING DURING RETRACTION OF THE UPPER ANTERIOR TEETH
이병채, 문정련,
소속 상세정보
이병채 ( ) - 연세대학교 치과대학 교정학교실
문정련 ( ) - 연세대학교 치과대학 교정학교실
KMID : 0361920010310010097
Abstract
In many cases of orthodontic treatment the upper anterior teeth are retracted. Periodontal problems may arise during incisor retraction, if the amount of tooth movement and the amount of remodeling in the anterior cortical bone are not the same. Therefore in this study, to find out the relationship between the amount of tooth movement and the amount of bone remodeling during retraction of the upper anterior teeth, lateral cephalograms of 56 female patients over 18-year-old were taken before and after treatment. Among the 56 patients, two groups were divided according to the type of root movement during retraction. 26 patients mainly moved by tipping and 30 by bodily movement. The cephalograms taken before and after treatment were superimposed upon the true horizontal plane. In the Tip-Group, the horizontal bone remodeling/tooth movement ratio was I : 1.63, and in the Torque-Group it was 1 : 1.66. Because the amount of tooth movement and the amount of bone remodeling were not the same in both groups, in the Tip-Group the root apex moved away from the palatal cortical plate and closer to the labial cortical plate, whereas in the Torque-Group the root moved away from the labial cortical plate and closer to the palatal cortical plate. Therefore, there are limitations in the amount of incisor retraction in patients with a very thin anterior cortical plate in the maxilla, and in patients with 3evere skeletal discrepancies orthognathic surgery should be considered and when orthodontic camouflage treatment is the only possible method, the orthodontist must be aware of the limitations of treatment.
키워드
true horizontal plane;bone remodeling/tooth movement ratio;경사이동;치체이동;true horizontal plane;bone remodeling/tooth movement ratio;tipping movement;torque movement
원문 및 링크아웃 정보
등재저널 정보