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Complete orthodontic load systems on teeth in a continuous full archwire: the role of triangular loop position.

Chen J, Bulucea I, Katona TR, Ofner S

Mechanical Engineering, Purdue University School of Engineering and Technology, Indianapolis, Ind, USA.

INTRODUCTION: A novel approach to characterizing orthodontic spring-generated force and moment systems has been developed. This method allows simultaneous measurement of all 6 force and moment components acting on a tooth. METHODS: A continuous full archwire space-closure technique was simulated, and the complete force and moment systems acting on the teeth adjacent to the extraction space were measured. RESULTS AND CONCLUSIONS: The data showed that, in addition to the intended forces and moments, there are nontrivial activation-dependent interactions with the other load components, and these complex relationships are affected by the position of the triangular loop.

Published 13 August 2007 in Am J Orthod Dentofacial Orthop, 132(2): 143.e1-8.
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