Upper arch dimensional changes with clear aligners in the early mixed dentition: A prospective study

Background One goal of orthodontic treatment in mixed dentition is to expand the maxillary arch to allow proper tooth alignment and a correction of sagittal and vertical malocclusions. However, for most treatment protocols, expected outcome is not really clear to allow for a standardization of phase...

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Veröffentlicht in:Journal of orofacial orthopedics 2023, Vol.84 (1), p.33-40
Hauptverfasser: Lione, Roberta, Cretella Lombardo, Elisabetta, Paoloni, Valeria, Meuli, Simonetta, Pavoni, Chiara, Cozza, Paola
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Sprache:eng
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Zusammenfassung:Background One goal of orthodontic treatment in mixed dentition is to expand the maxillary arch to allow proper tooth alignment and a correction of sagittal and vertical malocclusions. However, for most treatment protocols, expected outcome is not really clear to allow for a standardization of phase I orthodontic treatments. This lack of information makes it difficult for clinicians to predict tooth movements, including transverse expansion efficacy with Invisalign® (Align Technology, Santa Clara, CA, USA) in children. Therefore, the aim of the present study was to evaluate the transverse maxillary arch development with the Invisalign First System® in growing subjects. Methods The study group included 23 subjects (9 females, 14 males, mean age 9.4 ± 1.2 years). Patients were treated nonextraction with Invisalign First System® clear aligners with no auxiliaries other than Invisalign® attachments. Transverse interdental widths were measured only in the upper arch on each model at the start (T1) and at the end (T2) of treatment. A paired t‑test was chosen to compare T2–T1 changes. The level of significance was set at 5%. Results The greatest increase of maxillary width was detected at the level of the upper first deciduous molars (+3.7 ± 1.4 mm; P  
ISSN:1434-5293
1615-6714
DOI:10.1007/s00056-021-00332-z