Comparison of the predicted and achieved labiolingual inclinations of the maxillary central incisors in adult Class II division 2 malocclusions treated with clear aligners.

Korean J Orthod

Department of Orthodontics, Paediatric and Community Dentistry, College of Dental Medicine, University of Sharjah, Sharjah, United Arab Emirates.

Published: November 2024

AI Article Synopsis

  • The study investigated how accurately clear aligners, specifically with Power Ridges and composite attachments, could achieve the desired labiolingual inclination of maxillary central incisors in adults with Class II division 2 malocclusions.
  • It involved 24 patients, with results showing an average accuracy of 68.3% for the Power Ridges group and 71.6% for the attachment group, but no significant differences between the two methods were found.
  • The findings suggest that clinicians should be aware that the predicted inclinations are not fully realized during treatment and may need to adjust their approaches for Class II division 2 cases.

Article Abstract

Objective: This study aimed to compare the predicted and achieved labiolingual inclinations of the maxillary central incisors in adult Class II division 2 malocclusions treated with clear aligners using Power Ridges and composite attachments.

Methods: This retrospective study included 24 patients (mean age, 26.5 ± 3.3 years). The patients had Class II division 2 malocclusion and were treated with non-extraction with Invisalign clear aligners with either Power Ridges or composite attachments to enhance the predictability of required change in labiolingual inclination for the maxillary central incisors. Before treatment, treatment prediction and final digital models were exported as stereolithography files and superimposed using the eModel 9.0 "Compare" software. The predicted and achieved labiolingual incisor inclinations were compared.

Results: The mean accuracies of the achieved inclination of the central incisors were 68.3% in the Power Ridges group and 71.6% in the attachments group. No statistically significant differences in predictability were found between the groups ( > 0.05). A low positive correlation was observed between the predicted inclination change and the average absolute difference between the predicted and achieved inclinations (r = 0.19).

Conclusions: Predicted labiolingual inclination is not fully achieved with clear aligners in both the Power Ridges and attachment groups. Clinicians must take measures to counteract this limitation, specifically in Class II division 2 cases.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11602257PMC
http://dx.doi.org/10.4041/kjod24.093DOI Listing

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