Evaluation of anchorage loss after en masse retraction in orthodontic patients with maxillary protrusion using friction vs frictionless mechanics: randomized clinical trial.
Amr Mahmoud AttiaLeena A ShiblHeba M DehisYehya A MostafaAmr R El-Beialy
Published in: The Angle orthodontist (2024)
Extra anchorage considerations are needed during en masse retraction when frictionless mechanics is implemented as higher anchorage loss and molar rotation were detected. No difference in tip, torque, and root resorption was observed.