The Reliability of ClinCheck (R) Accuracy before and after Invisalign (R) Treatment-A Multicenter Retrospective Study

The objective was to evaluate the accuracy of ClinCheck (R) reliability in the sagittal, vertical, transverse, and arch length dimensions before and after Invisalign (R) (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 (R). Digital models were obtained from iTero (R) scanners from three different private practices where the treatment plans were performed and executed by multiple orthodontists with varying degrees of experience. The ClinCheck (R) models of the initial, achieved, and predicted outcome were obtained from Align Technology (R) 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 (R) was 76.85% overall; however, Invisalign (R) providers may need to exaggerate the digital tooth movements to achieve the desired outcome.