Correction of Angle’s Class II Division 1 Malocclusion with Anterior Deep Bite using Frictionless Loop Mechanics

The case study details the correction of Angle’s Class II Division 1 Malocclusion with anterior deep bite using frictionless loop mechanics. A 15-year-old female reported with a convex profile, acute nasolabial angle, incompetent lips, proclined and crowded upper anterior, deep bite, enhanced overjet, end-on canine relationship, and class II molar relationship. A skeletal class II pattern and Bolton’s disparity of 7 mm in the maxillary arch and 5 mm in the mandibular archwere discovered. A Kalra Simultaneous Intrusion and Retraction (K-SIR) arch was introduced in the upper arch to enable the simultaneous intrusion and retraction of the upper anterior teeth, while in the lower arch, en masse retraction and lower molar mesialization were continued with a type I active tie-back after the extraction of the upper first and lower second premolars. The Angle’s class I relationship of both the canines and molars was successfully established. The results after treatment were pleasing and remained stable. The K-SIR loop offers various advantages, including reduced friction between the bracket and archwire during the space closure, retraction, and concurrent tooth intrusion in cases of deep biting.