Multiple vibration displacements at multiple vibration frequencies stress impact on human femur computational analysis
Whole-body vibration training using single-frequency methods has been reported to improve bone mineral density. However, the intensities can exceed safe levels and have drawn unfavorable comments from subjects. In a previous article, whole-body vibration training using multiple vibration displacemen...
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description | Whole-body vibration training using single-frequency methods has been reported to improve bone mineral density. However, the intensities can exceed safe levels and have drawn unfavorable comments from subjects. In a previous article, whole-body vibration training using multiple vibration displacements at multiple vibration frequencies (MVDMVF) was reported. This article presents the computational simulation evaluation of stress dispersion on a femur with and without the MVDMVF input. A model of bone femur was developed from a computed tomography image of the lower limb with Mimics software from Materialise (Plymouth, Michigan). We analyzed the mesh model in COMSOL Multiphysics (COMSOL, Inc; Burlington, Massachusetts) with and without MVDMVF input, with constraints and load applied to the femur model. We compared the results with published joint stresses during walking, jogging, and stair-climbing and descending and with standard vibration exposure limits. Results showed stress levels on the femur are significantly higher with MVDMVF input than without. The stress levels were within the published levels during walking and stair-climbing and descending but below the stress levels during jogging. Our computational results demonstrate that MVDMVF generates stress level equivalent to the level during walking and stair-climbing. This evidence suggests that MVDMVF is safe for prolonged use in subjects with osteoporosis who ambulate independently. |
doi_str_mv | 10.1682/JRRD.2010.05.0096 |
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However, the intensities can exceed safe levels and have drawn unfavorable comments from subjects. In a previous article, whole-body vibration training using multiple vibration displacements at multiple vibration frequencies (MVDMVF) was reported. This article presents the computational simulation evaluation of stress dispersion on a femur with and without the MVDMVF input. A model of bone femur was developed from a computed tomography image of the lower limb with Mimics software from Materialise (Plymouth, Michigan). We analyzed the mesh model in COMSOL Multiphysics (COMSOL, Inc; Burlington, Massachusetts) with and without MVDMVF input, with constraints and load applied to the femur model. We compared the results with published joint stresses during walking, jogging, and stair-climbing and descending and with standard vibration exposure limits. Results showed stress levels on the femur are significantly higher with MVDMVF input than without. The stress levels were within the published levels during walking and stair-climbing and descending but below the stress levels during jogging. Our computational results demonstrate that MVDMVF generates stress level equivalent to the level during walking and stair-climbing. This evidence suggests that MVDMVF is safe for prolonged use in subjects with osteoporosis who ambulate independently.</description><identifier>ISSN: 0748-7711</identifier><identifier>EISSN: 1938-1352</identifier><identifier>DOI: 10.1682/JRRD.2010.05.0096</identifier><identifier>PMID: 21480091</identifier><identifier>CODEN: JRRDDB</identifier><language>eng</language><publisher>United States: Department of Veterans Affairs</publisher><subject>Biomechanical Phenomena ; Bone density ; Bone Density - physiology ; Bones ; Care and treatment ; Computer Simulation ; Demographic aspects ; Density ; Femur ; Femur - physiology ; Humans ; Muscular system ; Older people ; Osteoporosis ; Osteoporosis - rehabilitation ; Physiological aspects ; Risk factors ; Stress, Physiological ; Studies ; Vibration - adverse effects ; Vibration - therapeutic use ; Walking - physiology</subject><ispartof>Journal of rehabilitation research and development, 2011-01, Vol.48 (2), p.179-190</ispartof><rights>COPYRIGHT 2011 Department of Veterans Affairs</rights><rights>Copyright Superintendent of Documents 2011</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c394t-9fed0130f05bca03837c5010be45c686f977acdd854b6ec2c5f2bd6e4a6a24753</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21480091$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ezenwa, Bertram</creatorcontrib><creatorcontrib>Yeoh, Han Teik</creatorcontrib><title>Multiple vibration displacements at multiple vibration frequencies stress impact on human femur computational analysis</title><title>Journal of rehabilitation research and development</title><addtitle>J Rehabil Res Dev</addtitle><description>Whole-body vibration training using single-frequency methods has been reported to improve bone mineral density. However, the intensities can exceed safe levels and have drawn unfavorable comments from subjects. In a previous article, whole-body vibration training using multiple vibration displacements at multiple vibration frequencies (MVDMVF) was reported. This article presents the computational simulation evaluation of stress dispersion on a femur with and without the MVDMVF input. A model of bone femur was developed from a computed tomography image of the lower limb with Mimics software from Materialise (Plymouth, Michigan). We analyzed the mesh model in COMSOL Multiphysics (COMSOL, Inc; Burlington, Massachusetts) with and without MVDMVF input, with constraints and load applied to the femur model. We compared the results with published joint stresses during walking, jogging, and stair-climbing and descending and with standard vibration exposure limits. Results showed stress levels on the femur are significantly higher with MVDMVF input than without. The stress levels were within the published levels during walking and stair-climbing and descending but below the stress levels during jogging. Our computational results demonstrate that MVDMVF generates stress level equivalent to the level during walking and stair-climbing. This evidence suggests that MVDMVF is safe for prolonged use in subjects with osteoporosis who ambulate independently.</description><subject>Biomechanical Phenomena</subject><subject>Bone density</subject><subject>Bone Density - physiology</subject><subject>Bones</subject><subject>Care and treatment</subject><subject>Computer Simulation</subject><subject>Demographic aspects</subject><subject>Density</subject><subject>Femur</subject><subject>Femur - physiology</subject><subject>Humans</subject><subject>Muscular system</subject><subject>Older people</subject><subject>Osteoporosis</subject><subject>Osteoporosis - rehabilitation</subject><subject>Physiological aspects</subject><subject>Risk factors</subject><subject>Stress, Physiological</subject><subject>Studies</subject><subject>Vibration - adverse effects</subject><subject>Vibration - therapeutic use</subject><subject>Walking - physiology</subject><issn>0748-7711</issn><issn>1938-1352</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNptkVtrFTEUhYNY7LH6A3yRQR98mmPuyTyW1ktLRSj6HDKZHU2ZzIxJptB_b8ZTBasEdtg739qssBB6QfCeSE3fXl5fn-8pri0We4w7-QjtSMd0S5igj9EOK65bpQg5Rk9zvsEYU0bJE3RMCdeVJzt0-2kdS1hGaG5Dn2wJ89QMIS-jdRBhKrmxpYn_Mj7BjxUmFyA3uSTIuQlxsa409fH7Gm1FIK6pcXNc1vJLZMfG1nKXQ36GjrwdMzy_v0_Q1_fvvpx9bK8-f7g4O71qHet4aTsPAyYMeyx6ZzHTTDlR_9sDF05q6TulrBsGLXgvwVEnPO0HCdxKS7kS7AS9Oexd0lz95mJiyA7G0U4wr9loSYRWmtFKvnpA3sxrqnYrJBiVkilWodcH6JsdwYTJzyVZt600p1QQpjTveKX2_6HqGSAGN0_gQ53_JSAHgUtzzgm8WVKINt0Zgs2WtNmSNlvSBguzJV01L-_9rn2E4Y_id7TsJyztpWw</recordid><startdate>20110101</startdate><enddate>20110101</enddate><creator>Ezenwa, Bertram</creator><creator>Yeoh, Han Teik</creator><general>Department of Veterans Affairs</general><general>Superintendent of Documents</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>4T-</scope><scope>7QO</scope><scope>7RV</scope><scope>7TK</scope><scope>7TS</scope><scope>7X7</scope><scope>7XB</scope><scope>88C</scope><scope>88E</scope><scope>88I</scope><scope>8AF</scope><scope>8AO</scope><scope>8FD</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BEC</scope><scope>BENPR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB0</scope><scope>M0S</scope><scope>M0T</scope><scope>M1P</scope><scope>M2O</scope><scope>M2P</scope><scope>MBDVC</scope><scope>NAPCQ</scope><scope>P64</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>Q9U</scope><scope>S0X</scope><scope>7X8</scope></search><sort><creationdate>20110101</creationdate><title>Multiple vibration displacements at multiple vibration frequencies stress impact on human femur computational analysis</title><author>Ezenwa, Bertram ; Yeoh, Han Teik</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c394t-9fed0130f05bca03837c5010be45c686f977acdd854b6ec2c5f2bd6e4a6a24753</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Biomechanical Phenomena</topic><topic>Bone density</topic><topic>Bone Density - physiology</topic><topic>Bones</topic><topic>Care and treatment</topic><topic>Computer Simulation</topic><topic>Demographic aspects</topic><topic>Density</topic><topic>Femur</topic><topic>Femur - physiology</topic><topic>Humans</topic><topic>Muscular system</topic><topic>Older people</topic><topic>Osteoporosis</topic><topic>Osteoporosis - rehabilitation</topic><topic>Physiological aspects</topic><topic>Risk factors</topic><topic>Stress, Physiological</topic><topic>Studies</topic><topic>Vibration - adverse effects</topic><topic>Vibration - therapeutic use</topic><topic>Walking - physiology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ezenwa, Bertram</creatorcontrib><creatorcontrib>Yeoh, Han Teik</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Docstoc</collection><collection>Biotechnology Research Abstracts</collection><collection>Nursing & Allied Health Database</collection><collection>Neurosciences Abstracts</collection><collection>Physical Education Index</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Healthcare Administration Database (Alumni)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>ProQuest Pharma Collection</collection><collection>Technology Research Database</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>eLibrary</collection><collection>ProQuest Central</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>Nursing & Allied Health Database (Alumni Edition)</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Healthcare Administration Database</collection><collection>Medical Database</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Research Library (Corporate)</collection><collection>Nursing & Allied Health Premium</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of rehabilitation research and development</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ezenwa, Bertram</au><au>Yeoh, Han Teik</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Multiple vibration displacements at multiple vibration frequencies stress impact on human femur computational analysis</atitle><jtitle>Journal of rehabilitation research and development</jtitle><addtitle>J Rehabil Res Dev</addtitle><date>2011-01-01</date><risdate>2011</risdate><volume>48</volume><issue>2</issue><spage>179</spage><epage>190</epage><pages>179-190</pages><issn>0748-7711</issn><eissn>1938-1352</eissn><coden>JRRDDB</coden><abstract>Whole-body vibration training using single-frequency methods has been reported to improve bone mineral density. However, the intensities can exceed safe levels and have drawn unfavorable comments from subjects. In a previous article, whole-body vibration training using multiple vibration displacements at multiple vibration frequencies (MVDMVF) was reported. This article presents the computational simulation evaluation of stress dispersion on a femur with and without the MVDMVF input. A model of bone femur was developed from a computed tomography image of the lower limb with Mimics software from Materialise (Plymouth, Michigan). We analyzed the mesh model in COMSOL Multiphysics (COMSOL, Inc; Burlington, Massachusetts) with and without MVDMVF input, with constraints and load applied to the femur model. We compared the results with published joint stresses during walking, jogging, and stair-climbing and descending and with standard vibration exposure limits. Results showed stress levels on the femur are significantly higher with MVDMVF input than without. The stress levels were within the published levels during walking and stair-climbing and descending but below the stress levels during jogging. Our computational results demonstrate that MVDMVF generates stress level equivalent to the level during walking and stair-climbing. This evidence suggests that MVDMVF is safe for prolonged use in subjects with osteoporosis who ambulate independently.</abstract><cop>United States</cop><pub>Department of Veterans Affairs</pub><pmid>21480091</pmid><doi>10.1682/JRRD.2010.05.0096</doi><tpages>12</tpages></addata></record> |
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subjects | Biomechanical Phenomena Bone density Bone Density - physiology Bones Care and treatment Computer Simulation Demographic aspects Density Femur Femur - physiology Humans Muscular system Older people Osteoporosis Osteoporosis - rehabilitation Physiological aspects Risk factors Stress, Physiological Studies Vibration - adverse effects Vibration - therapeutic use Walking - physiology |
title | Multiple vibration displacements at multiple vibration frequencies stress impact on human femur computational analysis |
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