Accuracy of Invisalign<sup>®</sup> on Upper Incisors: A Systematic Review
Aline Gonçalves, Athénaïs Collard, Francisca Monteiro, David Matos, Óscar Carvalho, Rui Azevedo, F.S. Silva, Teresa Pinho
Abstract
clear aligner on the upper incisors present distinct accuracy, possibly related with movement complexity; intrusion of the incisors has low accuracy (in some cases, 0% of accuracy was reported when the tooth extruded), while incisor extrusion exhibit some of the highest accuracy values reported in the included studies (45%-142%, when the achieved movement was greater than the predicted). Besides, axial (i.e., torque and tip) and horizontal (i.e., translation and rotation) movements are usually effective, with accuracy values between 39%-156% and 42%-79%, respectively. Overall, we determined that the efficiency of aligner to reach the desired movements in the upper incisors was low, as often refinements were required in the included studies. The use of aligner features must be more often considered to improve movement accuracy.