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Three-dimensional soft tissue changes in orthodontic extraction and non-extraction patients: A prospective study
Roberto Rongo1, Line Nissen2, Cécile Leroy3
1Department of Neurosciences, Reproductive Sciences and Oral Sciences, School of Orthodontics, University of Naples 'Federico II', Naples, Italy.
Orthodontics & Craniofacial Research
|June 3, 2021
Summary
Orthodontic treatment with extractions showed minor soft tissue changes in the perioral area, notably a larger nasolabial angle compared to non-extraction cases. These 3D stereophotogrammetric findings reveal subtle differences in facial aesthetics.
Area of Science:
- Orthodontics
- Dentofacial Orthopedics
- Facial Aesthetics
Background:
- Assessing soft tissue changes is crucial in orthodontics.
- 3D stereophotogrammetry offers advanced imaging for facial analysis.
- Understanding differences between extraction and non-extraction treatment outcomes is important.
Purpose of the Study:
- To evaluate soft tissue alterations in orthodontic patients undergoing extraction versus non-extraction treatment.
- To compare perioral soft tissue changes using 3D stereophotogrammetric imaging.
Main Methods:
- A cohort of 23 extraction and 23 non-extraction patients were analyzed.
- 3D stereophotogrammetric images were captured at two time points (T0 and T1).
- 15 measurements were derived from 19 landmarks, with statistical analysis using t-tests.
Main Results:
- Soft tissue changes were primarily observed in the perioral area for both groups.
- The nasolabial angle significantly increased in the extraction group (3°) and decreased in the non-extraction group (-1.5°).
- A statistically significant difference of 4.4° in the nasolabial angle was found between the two groups.
Conclusions:
- 3D analysis revealed statistically significant, yet clinically minor, soft tissue differences between extraction and non-extraction orthodontic patients.
- The nasolabial angle was notably larger in the extraction group post-treatment compared to the non-extraction group.
