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Related Experiment Video

Updated: Jan 22, 2026

Single-stage Dynamic Reanimation of the Smile in Irreversible Facial Paralysis by Free Functional Muscle Transfer
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Does overbite reduction affect smile esthetics?

Ahmad M Hamdan, Shannon M Lewis, Kevin E Kelleher

    The Angle Orthodontist
    |July 16, 2019
    PubMed
    Summary
    This summary is machine-generated.

    Two overbite reduction methods decreased incisor display and flattened the smile arc. While some smiles improved, reduced incisor display persisted, requiring careful clinical consideration.

    Keywords:
    EstheticsIntrusion archLip to toothOverbiteSmileSmile line

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    Area of Science:

    • Orthodontics
    • Dental Aesthetics

    Background:

    • Overbite reduction is a common orthodontic goal.
    • The impact of different overbite reduction techniques on smile esthetics requires further investigation.

    Purpose of the Study:

    • To compare the effects of a maxillary incisor intrusion arch versus a flat anterior bite plate on smile esthetics.
    • To evaluate changes in overbite, incisor proclination, and smile arc during and after treatment.

    Main Methods:

    • A prospective clinical trial involving 32 patients undergoing overbite reduction.
    • Comparison of clinical and cephalometric records at pre-treatment, post-overbite reduction, and post-treatment stages.
    • Utilized a maxillary incisor intrusion arch (18 patients) or a flat anterior bite plate (14 patients).

    Main Results:

    • Both methods reduced overbite and incisor proclination.
    • Maxillary incisor intrusion was observed with the intrusion arch but was largely lost by treatment end.
    • Both groups showed reduced maxillary incisor display and a flattened smile arc during overbite reduction.

    Conclusions:

    • Overbite reduction using either method can negatively impact incisor display and smile arc.
    • While some patients experienced smile improvement, persistent reduction in incisor display necessitates caution.
    • Clinicians must implement strategies to mitigate adverse esthetic outcomes associated with overbite reduction.