What does this research mean for the field?

Both IFS and hyrax expanders produce stable maxillary arch expansion from mixed to permanent dentition, with IFS also providing stable mandibular arch expansion. Novelty: ClaimNovelty.CONFIRMATORY. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the stability of transverse changes in the maxillary and mandibular arches during the transition from mixed to permanent dentition.

March 7, 2026American Journal of Orthodontics and Dentofacial Orthopedics0 citationsOpen Access

Stability of transverse changes with clear aligners and hyrax expanders from the mixed to the permanent dentition

ATAndrew TsaiSingapore National Eye Center HSHeeyeon Suh STSandra Khong TaiUniversity of the Pacific

Key Points

To evaluate the stability of transverse changes in the maxillary and mandibular arches during the transition from mixed to permanent dentition.
Comparison of maxillary arch expansion from clear aligners (IFS) and hyrax expanders.
Assessment of mandibular arch changes and their stability over time.
Evaluation of longitudinal effects on dental structure.
Both IFS and hyrax produced consistent maxillary arch expansion throughout the transition period.
IFS also resulted in stable mandibular arch expansion, indicating its effectiveness for mild crowding.
No long-term vertical effects were noted with the use of IFS.

Abstract

Both IFS and hyrax produced maxillary arch expansion that was maintained throughout the transition from mixed to permanent dentition. The IFS also showed stable mandibular arch expansion, supporting its use for mild crowding or transverse deficiencies without long-term vertical effects.

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Cite This Study

Tsai et al. (2026) studied this question.

synapsesocial.com/papers/69abc0de5af8044f7a4e9752 https://doi.org/10.1016/j.ajodo.2026.01.017

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March 7, 2026American Journal of Orthodontics and Dentofacial Orthopedics0 citationsOpen Access

Stability of transverse changes with clear aligners and hyrax expanders from the mixed to the permanent dentition

ATAndrew TsaiSingapore National Eye Center HSHeeyeon Suh STSandra Khong TaiUniversity of the Pacific

Key Points

To evaluate the stability of transverse changes in the maxillary and mandibular arches during the transition from mixed to permanent dentition.
Comparison of maxillary arch expansion from clear aligners (IFS) and hyrax expanders.
Assessment of mandibular arch changes and their stability over time.
Evaluation of longitudinal effects on dental structure.
Both IFS and hyrax produced consistent maxillary arch expansion throughout the transition period.
IFS also resulted in stable mandibular arch expansion, indicating its effectiveness for mild crowding.
No long-term vertical effects were noted with the use of IFS.

Abstract

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View Full Paper

Cite This Study

Tsai et al. (2026) studied this question.

synapsesocial.com/papers/69abc0de5af8044f7a4e9752 https://doi.org/10.1016/j.ajodo.2026.01.017

Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

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