Open AccessDynamics of human facial aging through photoanthropometric analysis and quadratic modeling from child- to adulthood – a multi-centric study
Author(s) -
Laíse Nascimento Correia Lima,
Bianca Marques Santiago,
Ademir Franco,
Patrick Thevissen,
Flávio De Barros Vidal,
Lucas Faria Porto,
Inmaculada Alemán Aguilera,
Carlos Eduardo Palhares Machado,
Eduardo Daruge
Publication year - 2020
Publication title -
revista brasileira de ciências do envelhecimento humano
Language(s) - English
Resource type - Journals
eISSN - 2317-6695
pISSN - 1679-7930
DOI - 10.5335/rbceh.v17i1.9888
Subject(s) - allometry , psychology , audiology , mathematics , medicine , biology , ecology
This study aimed to investigate the dynamics of facial aging from photographs of individuals in different age groups and establish a pattern of facial growth. The sample consisted of digital photographs standardly taken from 1273 Brazilians aged between 2 and 24 years and equally distributed by sex into 12 specific age groups (2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 and 24 years). SAFF-2D® (Forensic Facial Analysis System, Brazilian Federal Police, Brazil) software package was used for positioning 28 landmarks on each photograph. Two-hundred and eight measurements were established between the landmarks. Photoanthropometric Indicators (PAI) of facial morphological alterations were obtained from the relations of facial measurements with a fixed reference (diameter of the iris). Non-transformed linear, quadratic and log-linear models were tested to screen the best approach to describe the facial growth with aging in females and males. The quadratic model reached the best outcomes in females (R2 99.04%) were statistically associated with age in females and males (p<0.05). Vertical facial alterations were the most evident over the time, especially the height of the human face (p<0.05). Data extraction and treatment performed with the photoanthropometric analysis and the quadratic statistical model described the dynamics of facial growth by tackling facial allometry.