Movements efficiency of the upper incisors with Invisalign® clear aligners: A systematic review.

Abstract

The aim of the present systematic review is to appraise the evidence regarding the effectiveness of the sorts of tooth movements performed with Invisalign® clear aligners on the maxillary incisors. A literature search of published trials was performed through electronic databases on Pubmed®, Cochrane library and LILACS from January 2007 to April 2020 that highlighted the accuracy of the maxillary incisors with clear aligners. Six relevant publications were identified: five studies were retrospective non-randomized, and one studies was prospective non-randomized. In the various movements performed by the Invisalign® clear aligners treatments on the upper incisors, movements are distinguished by their predictability: vertical movement have low accuracy whereas horizontal movements are very accurate. However, innovations are always more promising in terms of efficiency and the use of auxiliaries can increase the accuracy of movements. Even if this systematic revision includes few articles, a sample of 547 upper incisors was reached. New studies are needed, adequate to technological advances, increased aligner retention, and correct set-up programming by Clincheck®.