Back to Search Start Over

Tip, torque and rotation of maxillary molars during distalization using Invisalign: a CBCT study.

Authors :
Elfouly D
El-Harouni NM
Ismail HA
El-Bialy T
Ghoneima A
Source :
BMC oral health [BMC Oral Health] 2024 Jul 15; Vol. 24 (1), pp. 797. Date of Electronic Publication: 2024 Jul 15.
Publication Year :
2024

Abstract

Background: Desirable molar distalization by bodily movement is challenging and can be difficult to achieve. This study investigated changes in molar angulation (mesiodistal tipping), molar inclination (buccolingual torque) and rotation during distalization using clear aligner therapy (CAT).<br />Materials and Methods: This retrospective study included 38 cone beam computed tomographic images (CBCTs) taken for patients treated with molar distalization using CAT. The study evaluated pre- (T0) and post-treatment (T1) CBCTs of 19 adult patients (36.68 ± 13.50 years) who underwent maxillary molar distalization using Invisalign <superscript>®</superscript> aligners (Align Technology, Inc., San José, CA, USA) with a minimum of 2 mm distalization. Changes in maxillary molar tip, torque and rotation were measured for 61 molars (183 roots). Paired t-test was used to evaluate the differences between pre- and post-treatment readings. The level of significance was set at p ≤ 0.05. The reproducibility of measurements was assessed by the intraclass correlation coefficient (ICC).<br />Results: Molar angulation did not show significant change after distalization (p = 0.158) however, there was significant increase in buccal molar inclination (p = 0.034) and mesiobuccal molar rotation (p < 0.001).<br />Conclusion: Molar distalization of 2 mm did not cause significant molar tipping. Maxillary molars showed significant buccal inclination (increased torque) and mesiobuccal rotation after distalization.<br /> (© 2024. The Author(s).)

Details

Language :
English
ISSN :
1472-6831
Volume :
24
Issue :
1
Database :
MEDLINE
Journal :
BMC oral health
Publication Type :
Academic Journal
Accession number :
39009996
Full Text :
https://doi.org/10.1186/s12903-024-04529-7