Validation of the New Interpretation of Gerasimov's Nasal Projection Method for Forensic Facial Approximation Using CT Data(.).
The most common method to predict nasal projection for forensic facial approximation is Gerasimov's two-tangent method. Ullrich H, Stephan CN (J Forensic Sci, 2011; 56: 470) argued that the method has not being properly implemented and a revised interpretation was proposed. The aim of this study was to compare the accuracy of both versions using a sample of 66 postmortem cranial CT data. The true nasal tip was defined using pronasale and nasal spine line, as it was not originally specified by Gerasimov. The original guidelines were found to be highly inaccurate with the position of the nasal tip being overestimated by c. 2 cm. Despite the revised interpretation consistently resulting in smaller distance from true nasal tip, the method was not statistically accurate (p > 0.05) in positioning the tip of the nose (absolute distance >5 mm). These results support that Gerasimov's method was not properly performed, and Ullrich H, Stephan CN (J Forensic Sci, 2011; 56: 470) interpretation should be used instead.
Department of Anthropology, University of Toronto, Toronto, ON, Canada, M5S 2S2.
Genevieve
G
Maltais Lapointe
Laboratory of Biological Anthropology, Department of Forensic Medicine, The Panum Institute, University of Copenhagen, Blegdamsvej 3, Copenhagen N, DK-2200, Denmark.
Niels
N
Lynnerup
Department of Anthropology, University of Manitoba, Winnipeg, MB, Canada, R3T 5V5.
Robert D
RD
Hoppa
D001344:Autopsy; D005145:Face; D005554:Forensic Medicine; D006801:Humans; D009666:Nose / Q000033:anatomy & histology*; D056888:Patient Positioning; D014057:Tomography, X-Ray Computed
computed tomography; facial approximation; forensic anthropology; forensic science; nasal projection prediction; pronasale; two-tangent method