In order to improve retention of aligners and generate acting surfaces for more consistent tooth movement, clear aligner treatment calls for the application of resin attachments to the tooth IntroductIonThe variety of orthodontic treatments offered to adult patients who seek comfort and esthetics fitting their contemporary social and professional lives has significantly expanded in recent decades. 1 When Kesling unveiled "the positioner to refine the final stages of orthodontic treatment" in 1940, the idea of transparent aligners took a different turn.Ponitz debuted "the invisible retainer" in 1971, influenced by Kelsing's positioner.McNamara and Sheridan thereafter devised similar appliances. 2 With the advent of rapid prototyping (RP) and computer-aided design (CAD) tools, orthodontic treatment planning and polymeric aligner manufacture are now done industrially. 344]5 As an attractive substitute for permanent labial braces, Align Technology unveiled the Invisalign line of removable polyurethane aligners in 1998. 6With the incorporation of auxiliaries, attachments, and improved fabrication materials, the system has undergone significant evolution, enabling aligners to generate a wider range of motion in less time.
Chandrasekaran et al. (Tue,) studied this question.