Journal of the Korean Association of Oral and Maxillofacial Surgeons
- 제26권3호
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- Pages.229-237
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- 2000
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- 2234-7550(pISSN)
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- 2234-5930(eISSN)
한국성인 정상교합자에서 Delaire의 이상적 교합평면과 저작근 근활성도와의 관계에 대한 연구
A STUDY ON THE RELATION BETWEEN DELAIRE'S IDEAL OCCLUSAL PLANE AND MASTICATORY MUSCLE ACTIVITY IN KOREAN NORMAL ANGLE CLASS I OCCLUSION INDIVIDUALS
- Byun, Seong-Kyu (Dept. of Oral & Maxillofacial Surgery, College of Dentistry, Yonsei University) ;
- Yi, Choong-Kook (Dept. of Oral & Maxillofacial Surgery, College of Dentistry, Yonsei University)
- 발행 : 2000.06.30
초록
According to the functional matrix theory, Delaire proposes that individual occlusal plane was determined by variable effects of teeth, maxilla, mandible, cranium, cranial base and soft tissue matrix including the orofacial musculature. and that there is the ideal occlusal plane determined by the most proper spatial position of maxilla and mandible, functionally and esthetically. This study was designed to find out the relation between Delaire's ideal occlusal plane and muscle activity of masticatory muscles in individuals who have normal maxillo-mandibular relationships. Lateral cephalometric radiographs were taken and his/her individual occlusal plane and ideal occlusal plane were analyzed with Delaire's architectural and structural craniofacial analytic method. For evaluation of muscle activities of masticatory muscles, electromyography of anterior temporal muscle, superficial masseter muscle, and anterior belly of digastric muscle was recorded in fifty Korean normal Angle class I occlusion individuals. According to the average value of ideal occlusal plane, fifty normal Angle class I occlusion individuals were classified into three groups: Ideal occlusal plane group(I group), hyperrotation group(I+ group) and hyporotation group(I- group). The result of this study was as follows: 1. The results of Delaire's architectural and structural craniofacial analysis of lateral cephalography of the fifty Korean normal Angle class I occlusion individuals are that twelve persons(24%) have consistent or parallel with ideal occlusal plane and the average of angular difference was