دورية أكاديمية
Structure-property relationships of velar bone tissue from the energy absorbing horncore of bighorn sheep rams.
| العنوان: | Structure-property relationships of velar bone tissue from the energy absorbing horncore of bighorn sheep rams. |
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| المؤلفون: | Fuller LH; Department of Biomedical Engineering, University of Massachusetts, Amherst, MA 01003, USA. Electronic address: lhfuller@umass.edu., Karimy KF; Department of Biomedical Engineering, University of Massachusetts, Amherst, MA 01003, USA., Ruschke PL; Department of Biomedical Engineering, University of Massachusetts, Amherst, MA 01003, USA., Taghon MM; Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA 01003, USA., Crosby AJ; Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA 01003, USA., Donahue SW; Department of Biomedical Engineering, University of Massachusetts, Amherst, MA 01003, USA. |
| المصدر: | Acta biomaterialia [Acta Biomater] 2023 Aug; Vol. 166, pp. 419-429. Date of Electronic Publication: 2023 May 08. |
| نوع المنشور: | Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: England NLM ID: 101233144 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1878-7568 (Electronic) Linking ISSN: 17427061 NLM ISO Abbreviation: Acta Biomater Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Kidlington, Oxford, UK : Elsevier, c2004- |
| مواضيع طبية MeSH: | Sheep, Bighorn* , Brain Injuries*, Humans ; Animals ; Male ; Sheep ; Skull ; Bone Density ; Porosity |
| مستخلص: | Velar bone is the material that fills the horncore of bighorn sheep rams. The architectural dimensions of velar bone are orders of magnitude larger than trabecular bone, and velae are more sail-like compared to strut-like trabeculae. Velar bone is important for energy absorption and reduction of brain cavity accelerations during high energy head impacts, but velar bone material properties were previously unknown. It was hypothesized that velar bone tissue would have properties that are beneficial for increased energy absorption at the material level. Solid velar bone beams were tested using dynamic mechanical analysis and three-point bending to quantify mechanical properties. Additionally, the porosity, osteon population density, and mineral content of the solid velar sails were quantified. The velar bone damping factor (∼0.03 - 0.06) and modulus of toughness (3.9 ± 0.4 MJ/m 3 ) were lower than other mammalian cortical bone tissues. The solid bony sails have a bending modulus (8.6 ± 0.5 GPa) that lies within the range of bending moduli values previously reported for individual trabecular struts and cortical bone tissue. The solid velar bone sails had porosity (6.7 ± 0.9 %) and bone mineral content (66 ± 1 %) in the range of cortical bone values. Interestingly, velar sails contained osteons, which are rarely found in trabecular struts. The velar bone osteon population density (5.8 ± 0.9 osteons/mm 2 ) is in the low end of the range of values reported for cortical bone in other mammals. STATEMENT OF SIGNIFICANCE: Bighorn sheep rams sustain high energy head impacts during intraspecific combat without overt signs of brain injury. Previous studies have shown that the bony horncore plays a critical role in energy absorption and reduction of brain cavity accelerations post impact, which has implications for concussion prevention in humans. However, the material properties of the horncore velar bone were previously unknown. This study quantified the material properties and structure-property relationships of the horncore velar bone at the tissue level. Results from this study will improve our understanding of how bighorn sheep mitigate brain injury during head-to-head impacts and may inspire the design of novel materials for energy absorption applications (i.e., helmets materials that reduce concussion occurrence in humans). Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2023 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Bone adaptation; Bone mechanical properties; Osteons; Ovis canadensis; Velar bone |
| تواريخ الأحداث: | Date Created: 20230510 Date Completed: 20230703 Latest Revision: 20231116 |
| رمز التحديث: | 20240829 |
| DOI: | 10.1016/j.actbio.2023.05.013 |
| PMID: | 37164299 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1878-7568 |
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| DOI: | 10.1016/j.actbio.2023.05.013 |