Scalloped trimline aligners paired with sequential intrusion show clear biomechanical superiority for mandibular anterior intrusion, offering greater initial displacement, 13–40% lower root stress , and more favorable PDL stress patterns than high-trimline designs or simultaneous intrusion. Unlike simultaneous protocols—which shift excessive stress to canines and triple PDL load—sequential intrusion keeps forces localized, maintains posterior anchorage, and protects dental structures from overload. These insights strongly support using scalloped trimlines and sequential intrusion strategies when correcting deep overbites with clear aligners, ensuring safer, more predictable tooth movement and reduced risk of complications.
To read more; Click here Are your aligner protocols maximizing biomechanics to achieve stable, low-stress anterior intrusion? ##Reference## Su R, Sun J, Li S, Wang W.…
