Dr. Anthony Mair’s Presentation
Dr. Mair explains lower incisor proclination this way: "It is better to tip the crown and leave the root in bone than to bodily move the root out of bone; this setup is more reflective of natural compensation."
This presentation describes a case where Class II elastics were used against a lower aligner and caused bony dehiscence due to bodily movement of the lower incisors. The solution was to torque the root apex back into alveolar bone as recommended by Dr. Laursen et al (Am J Orthod Dentofacial Orthop 2020;157:29-34). Dr. Mair warned that we should prepare for more of these cases as the popularity of Class II elastics used with aligners increases.