3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads
| Autor: | Louis M. Ferreira, George S. Athwal, Jonathan Kusins, Nikolas K. Knowles, M. Columbus, Jakub Targosinski |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
3d strain medicine.medical_treatment Biomedical Engineering Strain (injury) Osteoarthritis Biomaterials 03 medical and health sciences Fractures Bone 0302 clinical medicine Humeral Heads medicine Humans 030304 developmental biology 030222 orthopedics 0303 health sciences X-Ray Microtomography medicine.disease Arthroplasty Trabecular bone Mechanics of Materials Cancellous Bone Humeral Head Head (vessel) Tomography Biomedical engineering |
| Zdroj: | Journal of the mechanical behavior of biomedical materials. 125 |
| ISSN: | 1878-0180 |
| Popis: | Understanding the local mechanical properties of trabecular bone at the humeral head-neck junction is essential for the safe design of stemless humeral head implants. Recent advancements in mechanical testing coupled with volumetric imaging have allowed for the ability to quantify full-field strain distributions throughout trabecular bone. Within this study, digital volume correlation (DVC) was applied to micro-computed tomography images to investigate the local load carrying characteristics of trabecular bone within osteoarthritic (OA) humeral heads subjected to stepwise loading. A multi-pegged indenter was used to transfer loads from a custom-fabricated loading apparatus to trabecular bone on the resection surface of OA humeral head osteotomies retrieved from patients undergoing total shoulder arthroplasty (TSA). In regions of trabecular bone that eventually fractured, third principal strains were significantly higher (95th percentile third principal strain = −12,558 μstrain, p |
| Databáze: | OpenAIRE |
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