The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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THE EFFECTS OF HIGH PULL HEADGEAR IN MIXED DENTITION WITH CLASS II MALOCCLUSION

혼합치열기 II급 부정교합에 대한 high pull Headgear의 효과

  • Kwon, Soo-Yong (Dept. of Orthodontics, College of dentistry, Dankook University) ;
  • Chung, Kyu-Rhim (Dept. of Orthodontics, College of dentistry, Dankook University)
  • 권순용 (경희대학교 치과대학 교정학교실) ;
  • 정규림 (경희대학교 치과대학 교정학교실)
  • Published : 1994.09.01
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Abstract

The purpose of this study is to observe the effect of high pull headgear on the craniofacial structures of mixed dentition with Class II malocclusion. The cephalometric headplates of 16 children treated by high pull headgeaar during 6 months and 18 children during 12 months were traced, digitized and statistically analyzed. The results were as follows. 1. Inhibition of foreward growth of maxilla was observed in both group. 2. Clockwise rotation of maxilla was observed in both group. 3. There were distal movement of maxillary 1st molar and inhibition of alveolar bone growth of maxilla. 4. There was compensatory extrusion on mandibular 1st molar. 5. The ratio of anterior facial height to posterior facial height was almostly not changed. In the treatment plan of C II malocclusion by high pull headgear, ire must prevent the mandibulasr 1st molar from extruding and for orthopedic effect, at least 6 months is needed.

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