Rectangular loops are one of the best options for correcting first order discrepancies in terminal molars. With aproppriate preactivations, the R-loop makes it possible to generate any moment-to-force combination to move molars in a predictable direction. Moreover, R-loops made my TMA wires have low deflection rates and a large range of action, which result in a constant and physiological force delivery. Finally, there is no friction with this mechanics, increasing the efficiency of the movement.
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Crédito especial: O modelo impresso usado neste vídeo foi desenvolvido pelo Professor André Drumond, Brasil. Visite seu website (https://www.orthovirtual.com/) e encontre excelente material didático sobre ORTODONTIA DIGITAL.