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Effect of lip thickness and competency on soft-tissue changes
Tabassum Ahsan Qadeer1, Mazia Jawaid1, Muhammad Faisal Fahim2
1Department of Orthodontics, Bahria University Medical and Dental College, Karachi, Pakistan.
Summary
Orthodontic treatment impacts facial esthetics by altering soft tissues. Incompetent lips showed more thinning and retraction, while thicker lips experienced greater length increase after incisor retraction.
Area of Science:
- Orthodontics
- Dental Esthetics
- Cephalometric Analysis
Background:
- Facial esthetics are a primary driver for orthodontic treatment.
- Soft tissue response to tooth movement during orthodontics varies significantly.
Purpose of the Study:
- To analyze soft tissue response to orthodontic tooth movement.
- To compare soft tissue changes based on lip thickness and competence.
Main Methods:
- Cross-sectional study of 37 patients with Class I and II Div 1 malocclusion post-maxillary first premolar extraction.
- Lateral cephalometric radiographs analyzed pre- and post-treatment.
- Pearson correlation and independent sample t-tests used for statistical analysis.
Main Results:
- Significant associations found between incisor retraction and lip base retraction, thinning, and vermilion retraction.
- Incompetent lips showed significantly more thinning and vermilion retraction.
- Thicker lips exhibited a significant increase in lip length (AB).
Conclusions:
- Lip retraction and thinning were more pronounced in patients with incompetent lips.
- Increased lip length (AB) was observed in patients with thicker lips.
- Incisor movement strongly correlated with lip base and vermilion changes in all lip types.
