V-bend force system: ۳D analysis using Finite Element Method

Aim: Several bracket characteristics are now in market. Preformed archwires are used without frequent need to add bends. V-bends are used in many situations. This bend as a basic maneuver is assessed thoroughly in this study.Materials and Methods: Finite Element Method (FEM) was selected to analyze the situation. A ۳D model of two maxillary central incisors with their supporting structures and an archwire were modeled. A V-bend in different positions relative to the teeth was defined. Forces produced were monitored.Results: Center V-bend (a/L=۱/۲) produced two moments in opposite direction. Moving towards one tooth added vertical forces in opposite direction. At a/L ˜˷۱۱۵, intrusive movement was noticed; while signs of intrusion and change in angulation was detected at ۱/۱۰< a/L<۱/۵. When a/L reached ۰.۴۲/۶.۴۰۸ same direction of moments were shown.Conclusion: V-bend force system is quite sensitive to its position.

Keywords:

Orthodontic wire bends , V-bend , Force system , finite element method