상악 견치의 저항 중심에 관한 Laser speckle interferometry와 holographic interferometry를 이용한 실험적 연구
Experimental study of the center of resistance of a maxillary canine using laser speckle interferometry and holographic interferometry
- 대한치과교정학회
- The Korean Journal of Orthodontics
- 제18권 제2호
- : SCOPUS, SCIE, KCI등재
- 1988.12
- 289 - 303 (15 pages)
The center of resistance is a important determining factor of tooth movement pattern. Laser speckle interferometry, recently developed for noninvasive measurement of small displacements (microns), was used to detect the center of resistance of a maxillary canine which has normal tooth axis and distal curved root in dry human skull. Laser holographic interferometry was used to verify the results of laser speckle interferometry. The following result were obtained; 1. In measurement of the degree of rotation, center of resistance was localized when the traction line passed 4.4/18.0 level from alveola crest to root apex. 2. In measurement of the degree of tipping, center of resistance was localized when the traction line passed 4.6/18.0 level from alveola crest to root apex. 3. In holographic determination, the center of resistance was observed when the traction line passed between 3mm to 6mm level from alveola crest to root apex, therefore the results using laser speckle interferometry was coincided with holographic results.