Tooth movement predictability with clear aligners in Orthodontics

Abstract

Introduction; The last century observed an increase in beauty conquest, and the quest of a better, if not a perfect smile is an undisputed component of it. This could explain the democratisation of orthodontics treatments among adult patients. A discrete and removable appliance is much more appreciated. Clear Aligner Therapy was introduced as a full set of aligners made of thermoformed polycarbonates materials. However, CAT received some criticisms from professionals that disparage its limitation and its parasites effects. Moreover, the outcome of CAT depends mostly on patient’s cooperation but also on the practician’s skills. Objectives; This work aims primarily to evaluate the perceptibility of tooth movement predictability with clear aligners among Spanish and french dentists and orthodontists. Moreover, we will try to understand why some movements can be perceived as more predictable than others. Methods; In order to assess it, a questionnaire composed of 25 questions was distributed to Spanish and french dentists between the 08.03.2023 and the 23.03.2023.. We received a total of 54 answers from which 14 participants were excluded. Results; Each result was thoroughly explained as well as organised in tables. Conclusion; Spanish and French practicians have an overall positive view on CAT’s predictability. They found the rotation of the upper incisors to be the most predictable movement and the intrusion of the lower anterior sector as the least predictable. Rotation movements in canines and premolars were found more difficult because of their rounded shapes. Horizontal movements were found more predictable. Movement in the anterior sector were also ranked as more predictable. Vertical movements were found more difficult to achieve because there are more complex and often produce unwanted movements. Some tools were introduced to try to improve some movement’s predictability such as; Power ridges, Inter and intra maxillary elastics, mini-screws, bonding buttons and IPR.