Trimline configuration, pressure point placement, and pCM significantly influence root torque control in CAT. Optimal force systems were achieved with specific combinations: FT designs with 0.18 mm pCM and dual pressure points without engagers, and ST designs with 0.15 mm pCM and buccal pressure points with engagers. These findings provide biomechanical evidence for optimizing aligner design, thereby enhancing the predictability of root movements and paving the way for greater efficiency of CAT as well as improved overall treatment quality.
Traversa et al. (Fri,) studied this question.