Lower incisors decompensation by torque auxiliary spring for an adult high-angle Class III extraction camouflage with preadjusted lingual appliance: A case report

Abstract

This case report describes a complex Class III high-angle case in an adult patient treated with preadjusted lingual appliance and premolar extractions. With the twofold aim of obtaining aesthetic improvement and ideal occlusal relationship, accurate set-up planification and linear biomechanical strategies, including lower incisors torque control, are needed to achieve the planned results. An auxiliary torque spring was inserted in order to obtain lower central incisors decompensation, for better occlusal and periodontal outcome. This case report demonstrates the possibility of solving successfully Class III malocclusion in adult patient by means of a completely invisible technique, with an orthodontic camouflage treatment by an ideal control of lower incisors torque, improving at the same time the patient facial aesthetics.

Keywords: Adult treatment; Class III; High-angle; Lingual appliance; Orthodontics; Torque spring.