Efficacy and Accuracy of Maxillary Arch Expansion with Clear Aligner Treatment

Gabriella Galluccio, Adriana A. De Stefano (), Martina Horodynski, Alessandra Impellizzeri, Rosanna Guarnieri, Ersilia Barbato, Stefano Di Carlo and Francesca De Angelis
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Gabriella Galluccio: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
Adriana A. De Stefano: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
Martina Horodynski: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
Alessandra Impellizzeri: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
Rosanna Guarnieri: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
Ersilia Barbato: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
Stefano Di Carlo: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy
Francesca De Angelis: Department of Oral and Maxillofacial Sciences, Sapienza University of Rome, 00161 Rome, Italy

IJERPH, 2023, vol. 20, issue 5, 1-9

Abstract: The aim of this work was to evaluate the efficacy and accuracy of maxillary arch transverse expansion using the Invisalign ® clear aligner system without auxiliaries other than Invisalign attachments. Knowing the accuracy of a movement through a clear aligner system allows the clinician to plan the treatment with greater precision and to achieve the expected result faster. The study group included 28 patients with a mean age of 17 ± 3.2 years. The treatment protocol for all the selected patients included the application of the Invisalign ® clear aligner system without auxiliaries, except for the Invisalign ® attachments; in no case were tooth extraction or interproximal enamel reduction (IPR) performed. Linear measurements of the expansion were assessed before treatment (T0), at the end of treatment (T1), and on final virtual models by ClinCheck ® (TC). A paired t -test was used to compare T0-T1 and T1-TC differences. A paired t -test was applied, and one normality was validated with the Shapiro–Wilks test. If normality was not met, the nonparametric test (Mann–Whitney U test) was applied. The level of significance was set at 5%. Statistically significant differences were found for all measurements at T0-T1. The results showed an average accuracy of efficacy of 70.88%. The differences in predictability between the various vestibular measurements (intercanine, inter-premolar, and intermolar) were not statistically significant, while they were for gingival measurements. The overall accuracy of the expansion treatment was 70%, regardless of tooth type.

Keywords: maxillary expansion; clear aligner appliances; malocclusion; orthodontic appliances; digital orthodontics (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:20:y:2023:i:5:p:4634-:d:1088763

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