제1소구치 발치를 동반한 제 I급 치조성 양악 전돌 환자의 치료 전〮후 비교에 관한 연구

• 영문명: THE STUDY OF COMPARISON BEFORE AND AFTER ORTHODONTIC TREATMENT IN CLASS I BIALVEOLAR PROTRUSION CASES WITH FOUR BICUSPID EXTRACTION
• 발행기관: 대한치과교정학회
• 저자명: 김형돈(Hyung-Don Kim) 박영철(Young-Chel Park)
• 간행물 정보: 『The Korean Journal of Orthodontics』제24권 제1호, 149~159쪽, 전체 11쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1994.03.31

영문 초록

The purposes of present study were to evaluate changes in models and lateral cephalometric head films during orthodontic treatment and to compare the amount of incisal retraction and anterior movement of molars with the two approaches of the retraction method of canine(sectional canine retractions vs sliding canine retractions) and the anchorage management(head gears vs no head gears, transpalatal arches vs no transpalatal arches and lingual arches vs no lingual arches) and to evaluate changes during orthodontic treatment in models with relation to lateral cephalometric head films. 67 Korean women with Angle´s Class I bialveolar protrusion were selected, whose initial chronologic age was above 16 yrs. Models and lateral cephalometric head films were taken before and after orthodontic treatment with four bicuspid extraction. the results were obtained as follows : 1. Significant decreases were observed in intermolar width, arch length and arch perimeter of maxilla and mandible but significant difference was not observed in intercanine width of maxilla and mandible during treatment period. 2. The linear change of the upper incisor to upper lip was 2.84:1 and the linear change of the lower incisor to lower lip was 1.45:1. 3. There were no significant differences between the two groups(sectional canine retractions vs sliding canine retractions), the two groups(transpalatal arches vs no transpalatal arches) and the two groups(lingual arches vs no lingual arches) in the amount of incisal retraction and anterior movement of molars. There were a greater amount of maxillary incisal retraction and a lesser amount of anterior movement of maxillary molars with the use of head gears than no use of head gears. 4. Changes during orthodontic treatment in models with relation to lateral cephalometric head films were obtained as follows : 1) Maxilla Central incisors were moved 3.79mm backward, canines were moved 0.22mm laterally and 3.70mm backward, and molars were moved 0.535mm medially and 2.29mm forward. 2) Mandible Central incisors were moved 3.04mm backward, canines were moved 0.l45mm laterally and 3.92mm backward, and molars were moved 0.755mm medially and 1.77mm forward.

키워드

Changes during orthodontic treatment Anchorage Four bicuspid extraction Class I bialveolar protrusion