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Profile changes following lower incisor repositioning: a comparison between patients with different growth pattern
1Department of Orthodontics, University of Insubria, Varese, Italy - sara.campi@ymail.com.
Minerva Stomatologica
|March 10, 2015
Summary
Orthodontic treatment significantly correlates lower incisor repositioning with soft-tissue profile changes. However, growth patterns did not significantly alter this relationship in the studied patients.
Area of Science:
- Orthodontics
- Craniofacial growth
- Facial aesthetics
Background:
- Individual growth variations can influence orthodontic treatment outcomes for soft-tissue profiles.
- Quantifying the interplay between growth and treatment effects on facial configuration is complex.
Purpose of the Study:
- To investigate the relationship between lower incisor repositioning (Frankfort Mandibular Incisor Angle - FMIA) and soft-tissue profile enhancement (Z-angle).
- To compare this relationship in patients with different facial growth patterns.
Main Methods:
- 81 subjects treated with Merrifield Directional Force System were categorized into favorable and non-favorable growth patterns based on the INDEX value.
- Changes in FMIA and Z-angle (∆ FMIA, ∆ Z-angle) were calculated pre- and post-treatment.
- The ratio between ∆ Z-angle and ∆ FMIA was analyzed.
Main Results:
- A statistically significant correlation was found between lower incisor uprighting and profile improvement.
- No statistically significant difference in this correlation was observed between the favorable and non-favorable growth groups.
Conclusions:
- The study highlights a significant link between orthodontic manipulation of lower incisors and facial profile changes.
- Separating the precise contributions of growth versus orthodontic intervention to final facial outcomes remains challenging.
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