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Related Experiment Video

Updated: Oct 28, 2025

Author Spotlight: 3D Movement Assessment of Maxillary Posterior Teeth in Clear Aligner Treatment
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Root resorption associated with maxillary buccal segment intrusion using variable force magnitudes.

Heba E Akl, Amr R El-Beialy, Mohamed Abd El-Ghafour

    The Angle Orthodontist
    |July 16, 2021
    PubMed
    Summary
    This summary is machine-generated.

    Increasing orthodontic intrusive force magnitude did not significantly increase root resorption during maxillary posterior dentoalveolar intrusion. This finding is crucial for optimizing treatment protocols and minimizing side effects in patients undergoing this procedure.

    Keywords:
    Force magnitudeMiniscrewMolar intrusionOpen biteRoot resorption

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    Area of Science:

    • Orthodontics
    • Dental Mechanics
    • Biomaterials

    Background:

    • Miniscrew-supported dentoalveolar intrusion is a common orthodontic technique.
    • Root resorption is a potential side effect of orthodontic tooth movement.
    • Understanding the relationship between force magnitude and root resorption is critical for treatment efficacy and safety.

    Purpose of the Study:

    • To compare the extent of root resorption associated with two different force magnitudes during miniscrew-supported maxillary posterior dentoalveolar intrusion.
    • To evaluate whether higher intrusive forces lead to increased root resorption.

    Main Methods:

    • Adult patients with skeletal open bite requiring maxillary posterior dentoalveolar intrusion were enrolled.
    • Participants were randomly assigned to receive either 200 g (comparison group) or 400 g (intervention group) of intrusive force per segment.
    • Root resorption was measured and compared between the two groups.

    Main Results:

    • Twenty participants (10 per group) completed the study.
    • Statistically significant root resorption occurred in both groups (0.84 ± 0.96 mm and 0.93 ± 1.00 mm).
    • No statistically significant difference in root resorption was observed between the lower and higher force groups.

    Conclusions:

    • Root resorption is an unavoidable consequence of orthodontic intrusion.
    • Increasing the intrusive force magnitude did not result in a statistically or clinically significant increase in root resorption.
    • These findings suggest that higher intrusive forces may be safely employed within the tested range without exacerbating root resorption.