Impact damage response of osteoporosis hip bone

Omid Razmkhah, H Ghasemnejad

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Osteoporosis and sideways fall are the two major determinants of proximal femur fractures among the elderly. More than 90% were reportedly caused by falls from standing height [2], though in some cases there is no clear evidence of falls or trauma. From a biomechanical perspective, hip fractures are thought to be caused in real settings by different directions of loading.

The force on the proximal femur during a fall causing hip fracture depends significantly on the density, thickness and stiffness of the body during impact. The process of fracture and its healing can only be understood in terms of structure and composition of the bone and also its mechanical properties. Bone fracture analysis investigates various failure mechanisms under different loading conditions. An accurate explicit finite element (FE) method would help scientists and researchers to predict the impact damage to bone structures.
In this paper, the effect of low velocity impact on the osteoporosis hip in ageing people will be studied in LSDYNA. In the first part, SIMPLEWARE software is used to create a 3D reconstruction and registration of semi-transparent CT scan image data. In the second part, the effect of cortical thickness and impact velocity on the energy absorption of the hip during a fall will be investigated on a 3D model. State-of-the-art techniques are used.
In part 3, validity of the FE method is evaluated by analysing the strength in the fracture of the contra-lateral femur. We examined whether our FE method could create a fracture in the contra-lateral femur which was identical to the real fracture. Discovering the critical impulse loading of hip would establish a benchmark to improve the design of safety instruments and consequently wellbeing of elderly people.
Original languageEnglish
Title of host publicationRecent advances in mechanical engineering applications
Subtitle of host publication4th European Conference of Mechanical Engineering (ECME' 13)
EditorsPradip Majumdar
Place of PublicationParis
PublisherWSEAS
Pages122-136
Number of pages14
ISBN (Electronic)9789604743452
ISBN (Print)9604743457
Publication statusPublished - 30 Oct 2013
Event4th European Conference of Mechanical Engineering
- Paris, France
Duration: 29 Oct 201331 Oct 2013
Conference number: 4
http://naun.org/wseas/cms.action?id=6145

Conference

Conference4th European Conference of Mechanical Engineering
Abbreviated titleECME '13
CountryFrance
CityParis
Period29/10/1331/10/13
Internet address

Fingerprint

Bone
Finite element method
Computerized tomography
Energy absorption
Aging of materials
Stiffness
Mechanical properties
Chemical analysis

Cite this

Razmkhah, O., & Ghasemnejad, H. (2013). Impact damage response of osteoporosis hip bone. In P. Majumdar (Ed.), Recent advances in mechanical engineering applications: 4th European Conference of Mechanical Engineering (ECME' 13) (pp. 122-136). Paris: WSEAS.

Impact damage response of osteoporosis hip bone. / Razmkhah, Omid; Ghasemnejad, H.

Recent advances in mechanical engineering applications: 4th European Conference of Mechanical Engineering (ECME' 13). ed. / Pradip Majumdar. Paris : WSEAS, 2013. p. 122-136.

Research output: Chapter in Book/Report/Conference proceedingChapter

Razmkhah, O & Ghasemnejad, H 2013, Impact damage response of osteoporosis hip bone. in P Majumdar (ed.), Recent advances in mechanical engineering applications: 4th European Conference of Mechanical Engineering (ECME' 13). WSEAS, Paris, pp. 122-136, 4th European Conference of Mechanical Engineering
, Paris, France, 29/10/13.
Razmkhah O, Ghasemnejad H. Impact damage response of osteoporosis hip bone. In Majumdar P, editor, Recent advances in mechanical engineering applications: 4th European Conference of Mechanical Engineering (ECME' 13). Paris: WSEAS. 2013. p. 122-136
Razmkhah, Omid ; Ghasemnejad, H. / Impact damage response of osteoporosis hip bone. Recent advances in mechanical engineering applications: 4th European Conference of Mechanical Engineering (ECME' 13). editor / Pradip Majumdar. Paris : WSEAS, 2013. pp. 122-136
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AB - Osteoporosis and sideways fall are the two major determinants of proximal femur fractures among the elderly. More than 90% were reportedly caused by falls from standing height [2], though in some cases there is no clear evidence of falls or trauma. From a biomechanical perspective, hip fractures are thought to be caused in real settings by different directions of loading. The force on the proximal femur during a fall causing hip fracture depends significantly on the density, thickness and stiffness of the body during impact. The process of fracture and its healing can only be understood in terms of structure and composition of the bone and also its mechanical properties. Bone fracture analysis investigates various failure mechanisms under different loading conditions. An accurate explicit finite element (FE) method would help scientists and researchers to predict the impact damage to bone structures. In this paper, the effect of low velocity impact on the osteoporosis hip in ageing people will be studied in LSDYNA. In the first part, SIMPLEWARE software is used to create a 3D reconstruction and registration of semi-transparent CT scan image data. In the second part, the effect of cortical thickness and impact velocity on the energy absorption of the hip during a fall will be investigated on a 3D model. State-of-the-art techniques are used. In part 3, validity of the FE method is evaluated by analysing the strength in the fracture of the contra-lateral femur. We examined whether our FE method could create a fracture in the contra-lateral femur which was identical to the real fracture. Discovering the critical impulse loading of hip would establish a benchmark to improve the design of safety instruments and consequently wellbeing of elderly people.

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