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Related Experiment Videos

Root resorption extremes resulting from clinical RME.

S R Langford

    American Journal of Orthodontics
    |May 1, 1982
    PubMed
    Summary

    Root resorption on teeth used for rapid maxillary expansion (RME) was extensive but did not worsen over time. Repair tissue increased with longer retention, suggesting relapse forces diminish after 3 months.

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    Area of Science:

    • Orthodontics
    • Dental Implantology
    • Maxillofacial Surgery

    Background:

    • Root surface resorption is a known complication of orthodontic treatment, particularly with appliances like rapid maxillary expansion (RME).
    • Understanding the long-term effects of retention on anchor teeth is crucial for patient outcomes.

    Purpose of the Study:

    • To assess the extent and progression of root surface resorption on RME anchor premolars after fixed retention.
    • To investigate the relationship between retention duration, RME period, and resorption area.
    • To evaluate the amount of repair tissue in resorption defects over time.

    Main Methods:

    • Analysis of extracted premolar teeth from 18 patients who underwent RME and subsequent fixed retention (14-52 weeks).
    • Quantification of root surface resorption areas.
    • Assessment of repair tissue within resorption defects.

    Main Results:

    • Extensive root resorption was observed on RME anchor premolars.
    • The total area of resorption did not significantly increase with longer retention periods (14-52 weeks).
    • The proportion of repair tissue in resorption defects increased with prolonged retention, indicating healing.
    • No correlation was found between RME duration, retention length, and total resorption area.

    Conclusions:

    • Root resorption on RME anchor teeth is significant but appears to stabilize over time.
    • Increased repair tissue suggests a healing response during prolonged retention.
    • Relapse forces may dissipate after approximately 3 months of retention.
    • Retention duration and RME period do not correlate with the total resorption area on anchor teeth.

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