Influence of changing various parameters in miniscrew-assisted rapid palatal expansion: A three-dimensional finite element analysis

Soungjun Yoon, Dong Yul Lee, Seok Ki Jung

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    Objective: This study aimed to analyze the effect of changing various parameters of the bone-borne rapid palatal expander (RPE) using the finite element method (FEM). Methods: In eight experimental groups, we investigated the effect of the number, position, and length of miniscrews; positional changes of the expander; and changes in the hook length on maxillary expansion. In finite element analysis, we compared the magnitude and distribution of stress, and the displacement changes following expansion of the bone-borne RPE. Results: When we compared the number and position of miniscrews, placing miniscrews in the anterior and posterior sides was advantageous for maxillary expansion in terms of stress distribution and displacement changes. Miniscrew length did not significantly affect stress distribution and displacement changes. Furthermore, anteroposterior displacement of the expander did not significantly affect transverse maxillary expansion but had various effects on vertical changes of the maxilla. The maxilla rotated clockwise when the miniscrews were placed in the anterior region. The hook length of the expander did not show consistent results in terms of changes in stress distribution and magnitude or in displacement changes. Conclusions: The findings of this study suggest that changes in the location and length of the miniscrews and displacement of the bone-borne RPE could affect the pattern of the maxillary expansion, depending on the combination of these factors.

    Original languageEnglish
    Pages (from-to)150-160
    Number of pages11
    JournalKorean Journal of Orthodontics
    Volume49
    Issue number3
    DOIs
    Publication statusPublished - 2019 May

    Keywords

    • Bone-borne rapid palatal expander
    • Finite element method
    • Miniscrew-assisted rapid palatal expander

    ASJC Scopus subject areas

    • Orthodontics

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