Dual-section versus conventional archwire for en-masse retraction of anterior teeth with direct skeletal anchorage: a finite element analysis

摘要

Dual-section archwire, whose cross section is 0.021 × 0.025-in in the anterior portion for increasing the incisor torque control, and 0.018 × 0.025-in in the posterior portion for reducing friction as compared to the 0.019 × 0.025-in archwire