title: [Relationship between the vertical loop structure and the mechanical properties.].
abstract: OBJECTIVE
  The relationship between vertical loop structure and its mechanical properties was investigated in order to provide reference data for more proper use of vertical loop.
  
  
  METHODS
  According to the acting manner in use, finite elements model of vertical loop was established and the finite elements software ANSYS was used to simulate the mechanical characteristics of the loops. The simulated data were summarized at the end.
  
  
  RESULTS
  The force and moment decreased with the increase of arm length, height and arc radius of the loop. The ratios of force to moment (M/F) decreased with the increase of arm length, but increased with the increase of height and arm radius. When the interval between the vertical arms enlarged, the force and moment rose and the M/F did not vary significantly.
  
  
  CONCLUSIONS
  To satisfy the requirement of individual patient, the structure of loop can be adjusted properly to output mediate force, moment and M/F value.
authors.affiliation: Department of Mechanical Engineering, Southeast University, Nanjing 210096, China. dongys@seu.edu.cn
authors.forename: Yin-sheng
authors.initials: YS
authors.lastname: Dong
authors.forename: Ping-hua
authors.initials: PH
authors.lastname: Lin
authors.forename: Wen-jing
authors.initials: WJ
authors.lastname: Chen
mesh_terms: D016382:Orthodontic Appliance Design; D009969:Orthodontic Wires; D013314:Stress, Mechanical; D014087:Tooth Movement Techniques