Designed Versus Achieved <scp>3D</scp> Mandibular Teeth Movements and Influencing Factors After First Premolar Extraction With Invisalign: A New Digital Root Model

This study highlights significant deviations between the designed and achieved mandibular tooth (crowns with roots) movements following the first series of Invisalign aligners in patients with first premolar extractions. Key findings demonstrate significant mesiodistal and buccolingual angular tooth movement deviations compared to linear movements (mesiodistal, buccolingual and vertical). Factors such as aligner generation (G6), attachment design, TADs and patient-specific variables (age, gender, overjet/overbite) emerged as pivotal determinants of movement accuracy. These findings may provide further evidence for virtual design during clear aligner treatment.