Changes in face topography from supine-to-upright position-And soft tissue correction values for craniofacial identification

Forensic Science International : Synergy
Lachlan Munn, Carl N Stephan

Abstract

Soft tissues of the human face hang from the skull under the downward vector of gravity. Subsequently, the fall of the tissues is not likely the same between supine, prone or upright positions with ramifications for soft tissue measurements such as average soft tissue thicknesses used in craniofacial identification. Here we use high-resolution Dimensional Imaging® DI3D stereo-photographs (Glasgow, Scotland) to map the shape change between upright and supine position in the same 62 participants and encode the surface shell differences as greyscale pixel intensity values. Statistical tests were conducted using MANOVA at 31 capulometric landmarks, with posture as the independent factor in a repeated measures design, and sex, somatotype and age (two groups of <50 and>50 years) as independent factors in a between subjects design. Results indicate that facial morphology changed in characteristic fashion between the positions: when supine, the soft tissue extruded inferior and lateral to the eyes (Δmin=+1.2mm; Δmax=+3.0mm, p<0.05) and retracted lateral to the mouth and around the nasolabial fold (Δmin=-1.0mm; Δmax=-2.4mm, p<0.05). These patterns were more marked in older subjects (posture=p<0.01, η2=0.55; and age=p<0.01; η2=0.29). By ...Continue Reading

Citations

Mar 27, 2020·The Journal of Craniofacial Surgery·Tomoko TsudaKoichi Kadomatsu
Mar 28, 2019·Forensic Sciences Research·Carl N StephanPeter Claes
Nov 6, 2018·Frontiers in Genetics·Stephen RichmondAlexei Zhurov
Dec 1, 2020·Medicine, Science, and the Law·Tobias Mr HoultonMaryna Steyn
Mar 6, 2021·Legal Medicine·Thiago L BeainiRodolfo F Haltenhoff Melani
Jun 2, 2021·Facial Plastic Surgery : FPS·Hiroshi NishiokaShunsuke Yuzuriha

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