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교정용 loop 스프링의 force system에 영향을 주는 요소

Other Titles
 Factors affecting force system of orthodontic loop spring 
 최광철  ;  김경호  ;  박영철 
 Korean Journal of Orthodontics (대한치과교정학회지), Vol.29(5) : 511-519, 1999 
Journal Title
 Korean Journal of Orthodontics (대한치과교정학회지) 
Issue Date
biomechanics ; L/D rate ; M/F ratio ; retraction spring
The shape of orthodontic retraction spring was varied and force system of each case was obtained using numerical analysis and verified with spring tester. The factors for obtaining biomechanically efficient spring under anatomic limitation were suggested as follows. 1. M/F ratio increases and L/D rate decreases as loop height increases. 2. M/F ratio increases and L/D rate decreases as incorporating more wire above minimum bending moment area. 3. M/F ratio decreases and L/D rate decrease as incorporating more wire below minimum bending moment area. 4. M/F ratio can not be greater than spring height no matter how much wire is incorporated at the apex of the loop. 5. Additional moment is necessary to obtain enough M/F ratio for translation under anatomical limitation. 6. Additional moment should be incorporated at every pah of the spring because M/F ratio and L/D rate decreases as horizontal spring length increases. 7. Material, cross section, and shape of the spring influence L/D rate, whereas M/F ratio is influenced by the shape of the spring independent from material and cross section.
Files in This Item:
T199901690.pdf Download
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Park, Young Chel(박영철)
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