Related Experiment Videos
Vertical facial pattern and orthodontic stability. Part II: Facial axis changes and stability
1University of Melbourne, Australia.
Australian Orthodontic Journal
|December 13, 2002
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.
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.
- 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.