성인에서 골격형 III급 부정교합자와 정상교합자의 근활성도에 관한 연구

• 영문명: AN ELECTROMYOGRAPHIC STUDY OF MUSCLE ACTIVITY IN NORMAL OCCLUSION AND SKELETAL CLASS III MALOCCLUSION IN ADULT
• 발행기관: 대한치과교정학회
• 저자명: 김택수(Taik-Soo Kim) 손병화(Byung-Hwa Sohn)
• 간행물 정보: 『The Korean Journal of Orthodontics』제22권 제3호, 627~646쪽, 전체 20쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1992.09.30

영문 초록

The purpose of this study was to investigate the relationship among the activity of the craniofacial muscle and craniofacial form and occlusal state. In this study, subjects were consisted of 23 male adults with skeletal Class III malocclusion and 30 male adults with normal occlusion. The measurements in oral exam, lateral cephalograrn, and F.M.G. recordings of anterior temporal, masseter, and upper lip muscles at rest position, clenching in centric occlusion, chewing of gum, swallowing of juice, were analyzed with SPSS system. The results were as follows: 1. At rest position upper lip muscle activity of skeletal Class III group was significantly higher than that of normal group. 2. Both clenching and chewing masseter and temporal muscle activity of normal group were significantly higher than that of skeletal Class III group. 3. During swallowing of juice, upper lip muscle activity of skeletal Class III group were significantly higher than that of normal group. 4. The activities of masseter and anterior temporal muscle during clenching and chewing were significantly correlated with hypodivergent facial form and number of occluded teeth. 5. The activity of upper lip during swallowing had positive correlation with mandibular prognathism.