3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads
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...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Kusins, Jonathan [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: A volume-shrinkage-based method for quantifying the inward solidification heat transfer of a phase change material filled in spherical capsules - Liu, Min-Jie ELSEVIER, 2016, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:125 ; year:2022 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.jmbbm.2021.104922 |
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ELV056142358 |
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| 245 | 1 | 0 | |a 3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads |
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| 520 | |a 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. | ||
| 520 | |a 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. | ||
| 650 | 7 | |a Digital volume correlation (DVC) |2 Elsevier | |
| 650 | 7 | |a CT-Compatible loading |2 Elsevier | |
| 650 | 7 | |a Osteoarthritis |2 Elsevier | |
| 700 | 1 | |a Knowles, Nikolas |4 oth | |
| 700 | 1 | |a Targosinski, Jakub |4 oth | |
| 700 | 1 | |a Columbus, Melanie |4 oth | |
| 700 | 1 | |a Athwal, George S. |4 oth | |
| 700 | 1 | |a Ferreira, Louis |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier |a Liu, Min-Jie ELSEVIER |t A volume-shrinkage-based method for quantifying the inward solidification heat transfer of a phase change material filled in spherical capsules |d 2016 |g Amsterdam [u.a.] |w (DE-627)ELV009727671 |
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10.1016/j.jmbbm.2021.104922 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001761.pica (DE-627)ELV056142358 (ELSEVIER)S1751-6161(21)00553-1 DE-627 ger DE-627 rakwb eng 690 VZ 52.43 bkl 52.52 bkl 52.42 bkl 50.38 bkl Kusins, Jonathan verfasserin aut 3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. Digital volume correlation (DVC) Elsevier CT-Compatible loading Elsevier Osteoarthritis Elsevier Knowles, Nikolas oth Targosinski, Jakub oth Columbus, Melanie oth Athwal, George S. oth Ferreira, Louis oth Enthalten in Elsevier Liu, Min-Jie ELSEVIER A volume-shrinkage-based method for quantifying the inward solidification heat transfer of a phase change material filled in spherical capsules 2016 Amsterdam [u.a.] (DE-627)ELV009727671 volume:125 year:2022 pages:0 https://doi.org/10.1016/j.jmbbm.2021.104922 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 52.43 Kältetechnik VZ 52.52 Thermische Energieerzeugung Wärmetechnik VZ 52.42 Heizungstechnik Lüftungstechnik Klimatechnik VZ 50.38 Technische Thermodynamik VZ AR 125 2022 0 |
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10.1016/j.jmbbm.2021.104922 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001761.pica (DE-627)ELV056142358 (ELSEVIER)S1751-6161(21)00553-1 DE-627 ger DE-627 rakwb eng 690 VZ 52.43 bkl 52.52 bkl 52.42 bkl 50.38 bkl Kusins, Jonathan verfasserin aut 3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. Digital volume correlation (DVC) Elsevier CT-Compatible loading Elsevier Osteoarthritis Elsevier Knowles, Nikolas oth Targosinski, Jakub oth Columbus, Melanie oth Athwal, George S. oth Ferreira, Louis oth Enthalten in Elsevier Liu, Min-Jie ELSEVIER A volume-shrinkage-based method for quantifying the inward solidification heat transfer of a phase change material filled in spherical capsules 2016 Amsterdam [u.a.] (DE-627)ELV009727671 volume:125 year:2022 pages:0 https://doi.org/10.1016/j.jmbbm.2021.104922 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 52.43 Kältetechnik VZ 52.52 Thermische Energieerzeugung Wärmetechnik VZ 52.42 Heizungstechnik Lüftungstechnik Klimatechnik VZ 50.38 Technische Thermodynamik VZ AR 125 2022 0 |
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10.1016/j.jmbbm.2021.104922 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001761.pica (DE-627)ELV056142358 (ELSEVIER)S1751-6161(21)00553-1 DE-627 ger DE-627 rakwb eng 690 VZ 52.43 bkl 52.52 bkl 52.42 bkl 50.38 bkl Kusins, Jonathan verfasserin aut 3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. Digital volume correlation (DVC) Elsevier CT-Compatible loading Elsevier Osteoarthritis Elsevier Knowles, Nikolas oth Targosinski, Jakub oth Columbus, Melanie oth Athwal, George S. oth Ferreira, Louis oth Enthalten in Elsevier Liu, Min-Jie ELSEVIER A volume-shrinkage-based method for quantifying the inward solidification heat transfer of a phase change material filled in spherical capsules 2016 Amsterdam [u.a.] (DE-627)ELV009727671 volume:125 year:2022 pages:0 https://doi.org/10.1016/j.jmbbm.2021.104922 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 52.43 Kältetechnik VZ 52.52 Thermische Energieerzeugung Wärmetechnik VZ 52.42 Heizungstechnik Lüftungstechnik Klimatechnik VZ 50.38 Technische Thermodynamik VZ AR 125 2022 0 |
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10.1016/j.jmbbm.2021.104922 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001761.pica (DE-627)ELV056142358 (ELSEVIER)S1751-6161(21)00553-1 DE-627 ger DE-627 rakwb eng 690 VZ 52.43 bkl 52.52 bkl 52.42 bkl 50.38 bkl Kusins, Jonathan verfasserin aut 3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. Digital volume correlation (DVC) Elsevier CT-Compatible loading Elsevier Osteoarthritis Elsevier Knowles, Nikolas oth Targosinski, Jakub oth Columbus, Melanie oth Athwal, George S. oth Ferreira, Louis oth Enthalten in Elsevier Liu, Min-Jie ELSEVIER A volume-shrinkage-based method for quantifying the inward solidification heat transfer of a phase change material filled in spherical capsules 2016 Amsterdam [u.a.] (DE-627)ELV009727671 volume:125 year:2022 pages:0 https://doi.org/10.1016/j.jmbbm.2021.104922 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 52.43 Kältetechnik VZ 52.52 Thermische Energieerzeugung Wärmetechnik VZ 52.42 Heizungstechnik Lüftungstechnik Klimatechnik VZ 50.38 Technische Thermodynamik VZ AR 125 2022 0 |
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10.1016/j.jmbbm.2021.104922 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001761.pica (DE-627)ELV056142358 (ELSEVIER)S1751-6161(21)00553-1 DE-627 ger DE-627 rakwb eng 690 VZ 52.43 bkl 52.52 bkl 52.42 bkl 50.38 bkl Kusins, Jonathan verfasserin aut 3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. 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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. Digital volume correlation (DVC) Elsevier CT-Compatible loading Elsevier Osteoarthritis Elsevier Knowles, Nikolas oth Targosinski, Jakub oth Columbus, Melanie oth Athwal, George S. oth Ferreira, Louis oth Enthalten in Elsevier Liu, Min-Jie ELSEVIER A volume-shrinkage-based method for quantifying the inward solidification heat transfer of a phase change material filled in spherical capsules 2016 Amsterdam [u.a.] (DE-627)ELV009727671 volume:125 year:2022 pages:0 https://doi.org/10.1016/j.jmbbm.2021.104922 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 52.43 Kältetechnik VZ 52.52 Thermische Energieerzeugung Wärmetechnik VZ 52.42 Heizungstechnik Lüftungstechnik Klimatechnik VZ 50.38 Technische Thermodynamik VZ AR 125 2022 0 |
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3d strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads |
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3D strain analysis of trabecular bone within the osteoarthritic humeral head subjected to stepwise compressive loads |
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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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. |
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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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. |
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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 < 0.001) compared to regions that did not fracture (95th percentile third principal strain = −7,806 μstrain). As well, bone volume fraction (p = 0.012), trabecular separation (p = 0.014), and trabecular number (p = 0.007) were found to influence the likelihood of trabecular bone fracture. Collectively, this work has led to a deeper understanding of the local load carrying characteristics of trabecular bone specific to patients receiving TSA for osteoarthritis. |
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