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3D Occlusal Changes of Upper First Molars After Rapid Maxillary Expansion on Permanent Versus Deciduous Teeth: a Retrospective Multicenter CBCT Study

Overview
Journal Prog Orthod
Publisher Springer
Specialty Dentistry
Date 2023 Jul 30
PMID 37518579
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Abstract

Background: The purpose of this study was to compare the three-dimensional dental changes for the maxillary first molars and the overall skeletal effects achieved after expansion between the rapid maxillary expansion (RME) appliance attached to two different anchor units, the maxillary deciduous molars and the maxillary permanent first molars.

Methods: Patients were retrospectively selected according to the anchorage unit used for RME: deciduous upper second molars (RME-E group; 10 M, 10 F; mean age 8.4 ± 1.1 years) and first upper permanent molars (RME-6 group; 10 M, 10 F; mean age 12.6 ± 1.8 years). CBCT scans were obtained before treatment start (T1) and after retention and removal of the expander (T2). Images were analyzed using a new three-dimensional intra-hemi-maxillary reference system. 3D landmarks were marked to calculate all changes on maxillary first permanent molars; mesio-distal and buccal-lingual inclination and rotation, as well as intermolar and interforaminal distances were calculated. The Wilcoxon test was used to compare within-group changes, whereas the Mann-Whitney test was used to compare between-group differences, with the significance level set at 0.05.

Results: In the RME-E group, significant distorotation and lingual inclination of the first permanent molars at T2 were observed (p < 0.01); in the RME-6 group, only the buccolingual inclination of the crossbite side after RME was resulted statistically significant (p < 0.01). In both groups, intermolar and interforaminal values increased significantly (p < 0.01). Intergroup analysis showed a significantly higher distorotation and reduced buccal inclination of maxillary first permanent molars in the RME-E group after RME (p < 0.01).

Conclusions: RME is effective in treating maxillary transverse hypoplasia; RME anchored too deciduous teeth spontaneously reduces buccal inclination and increases distorotation of maxillary first permanent molars, whereas anchorage to permanent molars is associated with increased buccal inclination, albeit with little clinical significance.

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References
1.
Cozzani M, Guiducci A, Mirenghi S, Mutinelli S, Siciliani G . Arch width changes with a rapid maxillary expansion appliance anchored to the primary teeth. Angle Orthod. 2007; 77(2):296-302. DOI: 10.2319/0003-3219(2007)077[0296:AWCWAR]2.0.CO;2. View

2.
Sayar G, Kilinc D . Rapid maxillary expansion outcomes according to midpalatal suture maturation levels. Prog Orthod. 2019; 20(1):27. PMC: 6626764. DOI: 10.1186/s40510-019-0278-9. View

3.
Cerruto C, Ugolini A, Di Vece L, Doldo T, Caprioglio A, Silvestrini-Biavati A . Cephalometric and dental arch changes to Haas-type rapid maxillary expander anchored to deciduous vs permanent molars: a multicenter, randomized controlled trial. J Orofac Orthop. 2017; 78(5):385-393. DOI: 10.1007/s00056-017-0092-2. View

4.
Seker E, Yagci A, Demirsoy K . Dental root development associated with treatments by rapid maxillary expansion/reverse headgear and slow maxillary expansion. Eur J Orthod. 2019; 41(5):544-550. DOI: 10.1093/ejo/cjz010. View

5.
Mutinelli S, Manfredi M, Guiducci A, Denotti G, Cozzani M . Anchorage onto deciduous teeth: effectiveness of early rapid maxillary expansion in increasing dental arch dimension and improving anterior crowding. Prog Orthod. 2015; 16:22. PMC: 4495101. DOI: 10.1186/s40510-015-0093-x. View