Many conditions can compromise facial symmetry, resulting in an impairment of the affected person from both esthetic and functional points of view. For these reasons, a detailed, focused, and objective evaluation of facial asymmetry is needed, both for surgical planning and for treatment evaluation. In this study, we present a new quantitative method to assess symmetry in different facial thirds, objectively defined on the territories of distribution of trigeminal branches. A total of 70 subjects (40 healthy controls and 30 patients with unilateral facial palsy) participated. A stereophotogrammetric system and the level of asymmetry of the subjects' hemi-facial thirds was evaluated, comparing the root mean square of the distances (RMSD) between their original and mirrored facial surfaces. Results show a high average reproducibility of area selection (98.8%) and significant differences in RMSD values between controls and patients (p = 0.000) for all of the facial thirds. No significant differences were found on different thirds among controls (p > 0.05), whereas significant differences were found for the upper, middle, and lower thirds of patients (p = 0.000). The presented method provides an accurate, reproducible, and local facial symmetry analysis that can be used for different conditions, especially when only part of the face is asymmetric.
Facial thirds−based evaluation of facial asymmetry using stereophotogrammetric devices: application to facial palsy subjects / M. Codari, V. Pucciarelli, F. Stangoni, M. Zago, F. Tarabbia, F. Biglioli, C. Sforza. - In: JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY. - ISSN 1010-5182. - 45:1(2017), pp. 76-81.
|Titolo:||Facial thirds−based evaluation of facial asymmetry using stereophotogrammetric devices: application to facial palsy subjects|
CODARI, MARINA (Primo)
PUCCIARELLI, VALENTINA (Secondo)
BIGLIOLI, FEDERICO (Penultimo)
SFORZA, CHIARELLA (Ultimo)
|Parole Chiave:||Facial asymmetry; Photogrammetry; Facial paralysis|
|Settore Scientifico Disciplinare:||Settore BIO/16 - Anatomia Umana|
Settore MED/29 - Chirurgia Maxillofacciale
|Data di pubblicazione:||2017|
|Data ahead of print / Data di stampa:||17-nov-2016|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.jcms.2016.11.003|
|Appare nelle tipologie:||01 - Articolo su periodico|