Measurement error of 3D craniofacial landmarks of an ontogenetic sample using computed tomography

BARBEITO - ANDRÉS J, ANZELMO M, VENTRICE F, SARDI ML

Journal of Oral Biology and Craniofacial Research

Elsevier

Año: 2012 vol. 2 p. 77 - 82

2212-4268

Computed tomography (CT) is a powerful tool in craniofacial researches that focus on morphological variation. In this field, an ontogenetic approach has been taken to study the developmental sources of variation and to understand the basis of morphological evolution. We analyzed measurement error (ME) in 3D CT images in diverse developmental stages using a sample of fifteen skulls ranging from 0 to 31 years. Two observers placed landmarks in each image three times. Measurement error was assessed before and after Generalized Procrustes Analysis. The results indicated that ME is larger in neurocranial structures, which are described mainly by type III landmarks and semilandmarks. In addition, adult and infant specimens showed the same level of ME. These results are specially relevant in the context of craniofacial growth research.