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Related Experiment Videos

Vertical facial pattern and orthodontic stability. Part II: Facial axis changes and stability.

M Beatrice1, M Woods

  • 1University of Melbourne, Australia.

Australian Orthodontic Journal
|December 13, 2002
PubMed
Summary

This study found no direct link between pretreatment facial height and long-term facial axis or occlusal changes after orthodontic treatment. Individual patient variations are significant, suggesting focus on function and aesthetics over strict occlusal stability control.

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Area of Science:

  • Orthodontics and Dentofacial Orthopedics
  • Cephalometric Analysis
  • Occlusal Stability

Background:

  • Understanding long-term stability after orthodontic treatment is crucial.
  • The role of the Facial Axis and Jarabak Facial Height Quotient in predicting outcomes requires further investigation.
  • Current methods for Facial Axis control during treatment are widely recommended.

Purpose of the Study:

  • To investigate relationships between Facial Axis changes and pretreatment Jarabak Facial Height Quotient.
  • To determine if Facial Axis changes correlate with post-treatment occlusal stability (weighted PAR score).
  • To analyze individual variations in long-term cephalometric and occlusal behavior.

Main Methods:

  • Lateral cephalograms and study casts from 55 orthodontic patients were analyzed.

Related Experiment Videos

  • Pretreatment Jarabak Facial Height Quotient was calculated.
  • Facial Axis changes and weighted PAR scores were measured during and after active treatment.

    • Main Results:

    • No significant relationships were found between pretreatment Jarabak Facial Height Quotient and post-treatment Facial Axis or occlusal changes.
    • A wide range of individual variations in Facial Axis and weighted PAR score behavior was observed.
    • Long-term Facial Axis changes were not consistently associated with occlusal deterioration.

    Conclusions:

    • Pretreatment facial morphology (Jarabak Facial Height Quotient) does not reliably predict long-term Facial Axis or occlusal stability.
    • Individual variability in post-treatment cephalometric and occlusal changes is substantial.
    • Facial Axis control methods during treatment should prioritize functional and aesthetic goals rather than solely ensuring long-term occlusal stability.