The three-dimensional nonlinear finite element analysis of force system of the "rocking-chair archwire"
Chen, L.; Zhang, D.; Fu, M.-k.; Sun, S.-l.; Liang, Y.
Zhonghua Kou Qiang Yi Xue Za Zhi 39(3): 239-241
2004
ISSN/ISBN: 1002-0098 PMID: 15196397 Document Number: 568401
The purpose of this study was to qualitatively and quantitatively analyze the initial force system of "rocking-chair archwire" on every tooth. Three-dimensional finite element model of "rocking-chair archwire" was set up, and nonlinear method was used to analyze the force system. The archwire exerted intruding force, labial force, lingual-root torque and mesial-labial moment on incisors; Extruding force, lingual-root torque and mesial-labial moment were applied on canines and premolars; The archwire also created intruding force, buccal force, buccal-root torque and mesial-labial moment on molars. "rocking-chair archwire" produced a complicated force system. While intruding incisors, molars and extruding premolars. It has a tendency to induce tooth rotation and tipping.