The Reliability of ClinCheck® Accuracy before and after Invisalign® Treatment—A Multicenter Retrospective Study

Abstract

The objective was to evaluate the accuracy of ClinCheck® reliability in the sagittal, vertical, transverse, and arch length dimensions before and after Invisalign® (Align Technology, Santa Clara, CA, USA) treatment. This retrospective study was conducted on 206 patients who underwent dual-arch clear aligner therapy exclusively with Invisalign®. Digital models were obtained from iTero® scanners from three different private practices where the treatment plans were performed and executed by multiple orthodontists with varying degrees of experience. The ClinCheck® models of the initial, achieved, and predicted outcome were obtained from Align Technology® and the values were compared using Pearson correlation (p < 0.05) to determine if predicted values were correlated with achieved values. ANOVA was used to compare the different centers. The highest reliabilities were associated with interincisal angle (96.23%), upper intercanine width (97.97%), lower intercanine width (97.67%), upper intermolar width (97.58%), and lower intermolar width (97.72%) (p < 0.001). The lowest reliabilities were associated with arch length parameters in which the upper was 38.79% and the lower at 30.02% (p = 0.03, p < 0.001). However, there were no statistically significant differences between the centers in terms of the accuracy of treatment provided. The mean predicted accuracy of Invisalign® was 76.85% overall; however, Invisalign® providers may need to exaggerate the digital tooth movements to achieve the desired outcome.