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. 2022 Mar 16;10:840622. doi: 10.3389/fbioe.2022.840622

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Copyright © 2022 Ferlias, Dalstra, Cornelis and Cattaneo.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Best performing attachment from each of the five groups and the “NoAtt” setup. Vertical Rectangular attachments performed best on both mesial and distal rotations. HemiEllipL performed best on disto-rotation but not on mesio-rotation. Worth noticing the high moments created after only 1° of rotation and also the small degree of permanent deformation and fatigue in the aligner when looking at the de-activation part of the hysteresis loop. The time needed to reach 4.5° rotation either side (0°–4.5°) was 64°s, time that clinically translates to an instance when snapping the aligner in place.