Three-Dimensional Analysis of Tooth Movement in Class I Bimaxillary Protrusion Treatment with En-Masse or Two-Step Space Closure: A Randomized Clinical Trial
Although the current literature does not indicate differences between the en masse and two-step retraction of the anterior teeth, the differential distalization of the canines is still routinely used as one of the resources for anchorage control. Through a 3D analysis of tooth movement, this presentation will answer the following questions: What magnitude of tooth movement is expected in retracting anterior teeth? What is the most conservative mechanics regarding anchorage loss? In which dental arch do we lose more anchorage?
Learning Objectives:
After this lecture, attendees will be able to:
To access tooth movement in bimaxillary protrusion treatment with extraction of four first premolars.
To discuss the mechanics of space closure by en masse and two-step anterior retraction.
To compare anchorage loss in the upper and lower arches with en masse and two-step anterior retraction.
