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Soft tissue facial angles in individuals with ectodermal dysplasia: A three-dimensional noninvasive study
Chiarella Sforza1, Claudia Dellavia, Maria Goffredi
1Functional Anatomy Research Center, Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Dipartimento di Morfologia Umana, Facoltà di Medicina e Chirurgia and Facoltà di Scienze Motorie, Università degli Studi di Milano, Italy. farc@unimi.it
Summary
Patients with hypohidrotic ectodermal dysplasia exhibit flatter facial profiles. Quantitative analysis revealed distinct facial phenotypes, with variations correlating to age and dental development.
Area of Science:
- Craniofacial morphology
- Genetics and developmental biology
- Medical imaging and analysis
Background:
- Hypohidrotic ectodermal dysplasia (HED) is a genetic disorder affecting ectodermal structures, including teeth and facial features.
- Quantitative data on the facial soft tissue morphology in HED patients is limited.
- Understanding these craniofacial characteristics is crucial for diagnosis and treatment planning.
Purpose of the Study:
- To provide quantitative measurements of facial soft tissue features in individuals with HED.
- To compare the facial morphology of HED patients to a healthy control group.
- To identify patterns and variations in facial phenotypes within the HED population.
Main Methods:
- Prospective study involving 35 HED patients (18 male, 17 female) aged 3-41 years.
- 3D facial landmark data analyzed for horizontal and sagittal facial convexity, naso-labial angle, and soft tissue gonial angles.
- Comparison with 504 healthy individuals; z-scores calculated and cluster analysis performed.
Main Results:
- HED patients displayed significantly flatter facial profiles (increased horizontal and sagittal convexity) and a more acute naso-labial angle compared to controls.
- Facial convexity and angles showed less deviation from the norm with increasing age and number of teeth.
- Cluster analysis identified three distinct facial phenotype groups within the HED cohort.
Conclusions:
- Individuals with HED present with a characteristic flatter facial morphology.
- Facial phenotype variations in HED are patterned and can be differentiated through cluster analysis.
- Age and dental status influence the degree of craniofacial deviation in HED.