The dynamic impact behavior of the human neurocranium
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The dynamic impact behavior of the human neurocranium. / Zwirner, Johann; Ondruschka, Benjamin; Scholze, Mario; Workman, Joshua; Thambyah, Ashvin; Hammer, Niels.
In: SCI REP-UK, Vol. 11, No. 1, 11331, 31.05.2021.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - The dynamic impact behavior of the human neurocranium
AU - Zwirner, Johann
AU - Ondruschka, Benjamin
AU - Scholze, Mario
AU - Workman, Joshua
AU - Thambyah, Ashvin
AU - Hammer, Niels
PY - 2021/5/31
Y1 - 2021/5/31
N2 - Realistic biomechanical models of the human head should accurately reflect the mechanical properties of all neurocranial bones. Previous studies predominantly focused on static testing setups, males, restricted age ranges and scarcely investigated the temporal area. This given study determined the biomechanical properties of 64 human neurocranial samples (age range of 3 weeks to 94 years) using testing velocities of 2.5, 3.0 and 3.5 m/s in a three-point bending setup. Maximum forces were higher with increasing testing velocities (p ≤ 0.031) but bending strengths only revealed insignificant increases (p ≥ 0.052). The maximum force positively correlated with the sample thickness (p ≤ 0.012 at 2.0 m/s and 3.0 m/s) and bending strength negatively correlated with both age (p ≤ 0.041) and sample thickness (p ≤ 0.036). All parameters were independent of sex (p ≥ 0.120) apart from a higher bending strength of females (p = 0.040) for the 3.5 -m/s group. All parameters were independent of the post mortem interval (p ≥ 0.061). This study provides novel insights into the dynamic mechanical properties of distinct neurocranial bones over an age range spanning almost one century. It is concluded that the former are age-, site- and thickness-dependent, whereas sex dependence needs further investigation.
AB - Realistic biomechanical models of the human head should accurately reflect the mechanical properties of all neurocranial bones. Previous studies predominantly focused on static testing setups, males, restricted age ranges and scarcely investigated the temporal area. This given study determined the biomechanical properties of 64 human neurocranial samples (age range of 3 weeks to 94 years) using testing velocities of 2.5, 3.0 and 3.5 m/s in a three-point bending setup. Maximum forces were higher with increasing testing velocities (p ≤ 0.031) but bending strengths only revealed insignificant increases (p ≥ 0.052). The maximum force positively correlated with the sample thickness (p ≤ 0.012 at 2.0 m/s and 3.0 m/s) and bending strength negatively correlated with both age (p ≤ 0.041) and sample thickness (p ≤ 0.036). All parameters were independent of sex (p ≥ 0.120) apart from a higher bending strength of females (p = 0.040) for the 3.5 -m/s group. All parameters were independent of the post mortem interval (p ≥ 0.061). This study provides novel insights into the dynamic mechanical properties of distinct neurocranial bones over an age range spanning almost one century. It is concluded that the former are age-, site- and thickness-dependent, whereas sex dependence needs further investigation.
KW - Adolescent
KW - Adult
KW - Aged
KW - Aged, 80 and over
KW - Biomechanical Phenomena
KW - Child
KW - Child, Preschool
KW - Female
KW - Humans
KW - Infant
KW - Infant, Newborn
KW - Male
KW - Middle Aged
KW - Skull Fractures/etiology
KW - Temporal Bone/anatomy & histology
KW - Young Adult
U2 - 10.1038/s41598-021-90322-3
DO - 10.1038/s41598-021-90322-3
M3 - SCORING: Journal article
C2 - 34059728
VL - 11
JO - SCI REP-UK
JF - SCI REP-UK
SN - 2045-2322
IS - 1
M1 - 11331
ER -