The cutting edge—an investigation into the pressure necessary for cutting skin with different knife blade types

Bolliger, Stephan A.; Wallace, Esmé; Dobay, Akos; Knaute, Damaris Froehlich; Thali, Michael J.; Barrera, Vera

doi:10.1007/s00414-020-02270-8

Cited by 3 publications

(2 citation statements)

References 18 publications

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“…At the same time, important attention should be paid to various types of sharp objects that can cause stab wounds. Thus, in the study of Bolliger S. A. and co-authors [4], the force required to damage the entire thickness of the skin with a pocket knife and paring knife was analyzed on biological imitators of human skin. For the former, the minimum penetration force was 1900 g and for the latter 700 g, which is an unexpected result, given the seemingly identical nature of the knives from the point of view of forensic medicine.…”

Section: Discussionmentioning

confidence: 99%

Morphological features of stab–cut wounds of the skin of the trunk and limbs inflicted by kitchen knives

Boymanov,

Kushbakov,

Rashidov

2023

Rep. of Morph.

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Examination of injuries caused by sharp objects is a complex process that requires the application of a whole range of knowledge not only in the field of forensic medicine, but also in human anatomy. Among all sharp objects, stab–cut objects are the most common, namely the kitchen knife. Researching the peculiarities of the morphology of injuries to various anatomical parts of the human body with this subject would improve the quality of forensic research. The purpose of the study is to analyze the morphological features of stab–cut wounds to the skin of the trunk and limbs caused by kitchen knives. A forensic examination of 93 stab–cut wounds of corpses, which were inflicted by kitchen knives with one-sided sharpening and a straight butt, was carried out. Wounds in the chest ranged in size from 1.7×0.2 cm to 4.3×0.6 cm; wounds in the abdomen ranged in size from 1.8×0.4 cm to 3.3×0.7 cm; wounds in the lumbar region had sizes from 1.7×0.2 cm to 4.0×0.6 cm; wounds on the upper extremities – from 1.5x0.9 cm to 3.0×0.6 cm and wounds on the lower extremities from 1.5x0.2 cm to 3.2x0.6 cm. In all cases, the wounds had even edges and a smooth surface of the walls. Wounds located along Langer's line have a linear shape, and those located across Langer's lines have an oval shape. In addition, a different shape of the butt section was found, depending on the localization and the force of immersion. In this way, characteristic differences in the shape of the butt cut were revealed and the existence of differences in its morphology in different anatomical parts of the body was proved. Taking into account the location of the injury according to the location of Langer's lines should be standard procedure in forensic investigations of injuries caused by sharp objects.

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Section: Discussionmentioning

confidence: 99%

Morphological features of stab–cut wounds of the skin of the trunk and limbs inflicted by kitchen knives

Boymanov,

Kushbakov,

Rashidov

2023

Rep. of Morph.

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“…Although the choice of sharp force tools in our sample might have been coincidental, we point to the difference in pressure needed to penetrate skin with varying blades. Smooth knife blades slice through the skin at a pressure of at least 1900 g, while a serrated blade takes considerably less pressure (700 g) to penetrate skin, due to the higher energy density and the relative ease with which a serrated blade tears into skin [66].…”

Section: Further Analysesmentioning

confidence: 99%

Perimortem Skeletal Sharp Force Trauma: Detection Reliability on CT Data, Demographics and Anatomical Patterns from a Forensic Dataset

Braun

Indra

Lösch

et al. 2022

Biology

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The increasing importance of trauma analysis by means of postmortem computed tomography (PMCT) is insufficiently reflected in forensic curricula, nor are best practice manuals available. We attempt to detect sharp force bone lesions on PMCT of closed forensic cases with the aims of assessing errors and pointing out patterns in anatomical location and manner of death (MOD). We investigated 41 closed sharp force fatality cases, with available PMCT and forensic reports. Two observers with different radiological training assessed the lesions on PMCT scans (2D and 3D) for comparison with the reports. Between 3% (suicides) and 15.3% (homicides) of sharp force injuries caused visible bone lesions. While our observations were repeatable, each forensic investigation left a similar number of bone lesions undetected. Injury patterns differed between MOD, with thoracic bone lesions being most frequent overall. Soft tissue injury location varied between the MOD. Associations between MOD and age as well as number of injuries were significant. The detection of bone lesions on PMCT for untrained forensic specialists is challenging, curricula and pertinent manuals are desirable. With the low frequency of bone lesions compared to soft tissue injuries, we should be aware when analyzing decomposed bodies.

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Chipped-Stone Crescents from the Terminal Pleistocene–Early Holocene of Far Western North America and the Transverse Projectile Point Hypothesis

Amick

2024

J Archaeol Method Theory

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The cutting edge—an investigation into the pressure necessary for cutting skin with different knife blade types

Cited by 3 publications

References 18 publications

Morphological features of stab–cut wounds of the skin of the trunk and limbs inflicted by kitchen knives

Morphological features of stab–cut wounds of the skin of the trunk and limbs inflicted by kitchen knives

Perimortem Skeletal Sharp Force Trauma: Detection Reliability on CT Data, Demographics and Anatomical Patterns from a Forensic Dataset

Chipped-Stone Crescents from the Terminal Pleistocene–Early Holocene of Far Western North America and the Transverse Projectile Point Hypothesis

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