The korean journal of orthodontics (대한치과교정학회지)
- Volume 21 Issue 2 Serial No. 34
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- Pages.419-432
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- 1991
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- 2234-7518(pISSN)
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- 2005-372X(eISSN)
THE EFFECTS OF CLASS III INTERMAXILLARY TRACTION IN MIXED DENTITION WITH ANTERIOR CROSSBITES
혼합치열기 반대교합자에서 III급 악간견인력의 효과에 관한 연구
- Baek, Jong-Eun (Department of Orthodontics, College of Dentistry, Kyung Hee University) ;
- Chung, Kyu-Rhim (Department of Orthodontics, College of Dentistry, Kyung Hee University)
- Published : 1991.07.01
Abstract
The purpose of this study is to observe how the Class III intermaxillary elastics act upon the craniofacial structures of mixed dentition with anterior crossbites. The cephalometric headplafes of 16 childrens treated only with Class III elastics (C III elastics group) and 23 childrens treated with Class III elastics and Reverse pull headgear simultaneously (C III elastics + RPHG group) were traced, digitized and statistically analyzed. The results were as follows. 1 . Anterior displacement of maxilla was observed in both groups. 2. Simultaneous Class III elastics and reverse pull headgear group showed the counterclockwise rotation of maxilla, however Class III elastics group manifested no rotational change of maxilla. 3. Simultaneous Class III elastics and reverse pull headgear group showed the downward and backward rotation of mandible, however Class III elastics group manifested no rotational change of mandible. 4. Counterclockwise canting of occlusal plane, labial tipping of upper incisor and lingual tipping of lower incisor and mesial displacement of upper molar to pterygoid root vertical were observed in both groups.
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