Laser 반사측정법을 이용한 상악전치부의 후방견인시 저항중심의 수직적 위치에 관한 실험적 연구

• 영문명: Experimental study of the vertical location of the centers of resistance for maxillary anterior teeth during retraction using the laser reflection technique
• 발행기관: 대한치과교정학회
• 저자명: 우재영(Jae- Young Woo) 박영철(Young-Chel Park)
• 간행물 정보: 『The Korean Journal of Orthodontics』제23권 제3호, 375~389쪽, 전체 15쪽
• 주제분류: 의약학 > 기타의약학
• 파일형태: PDF
• 발행일자: 1993.09.30

영문 초록

The delivery of optimal orthodontic treatment is greatly influenced by a clinician´s ability to predict and control tooth movement achieved by applying known force systems to the dentition. It is important to determine the location of the center of resistance of a tooth or group of teeth to better understand the nature of their displacement characteristics under the various force levels. The purpose of this study was to define the location of the centers of resistance of various units of the upper anterior segment for lingually directed 100gm and 200gm force in a dry human skull. The units investigated were composed of four incisors and six anterior teeth. In addition, the effect of change in force magnitude on the location of the center of resistance of these units was investigated. The laser reflection technique was used to measure the initial displacements of the consolidated teeth under loading. The results were as follows: 1. The instantaneous center of resistance for the four anterior teeth was located vertically between level 4 and level 5-that is, at 37.4 % apical to the cementoenamel junction level. 2. The instantaneous center of resistance for the six anterior teeth was located vertically just beneath level 5-that is, at 50.3 % apical to the cementoenamel junction level. 3. Increasing force levels had little effect on the location of the center of resistance of a given unit. 4. The location of the instantaneous center of resistance shifted apically as the number of dental units consolidated increased.

키워드

laser reflection technique center of resistance maxillary anterior teeth retraction