Strain shielding 12 weeks after femoral reaming and nailing in rats
The purpose of this study was to investigate the in vivo strain-shielding in rat femora 12 weeks after intramedullary nailing with either flexible or rigid implants. Five days prior to death, unidirectional strain gauge units were implanted on the anterior bone surface bilaterally. Median strain val...
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| Veröffentlicht in: | Acta orthopaedica 1989, Vol.60 (3), p.349-352 |
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| creator | Husby, Otto Schnell Gjerdet, Nils Roar Melster, Anders O. |
| description | The purpose of this study was to investigate the in vivo strain-shielding in rat femora 12 weeks after intramedullary nailing with either flexible or rigid implants. Five days prior to death, unidirectional strain gauge units were implanted on the anterior bone surface bilaterally. Median strain values of reamed only and polyacetal-nailed femora ranged from 67 to 90 percent of the intact side. Removal of polyacetal nails and sham operations gave negligible changes in strain. Strain of the steel-nailed femora was 51 percent of the intact side. Removal of nails increased strain to 91 percent of the intact side.
Testing of femora after removal of implants revealed stiffness of 116 and 103 percent of normal in reamed-only and polyacetal-nailed groups, respectively. Stiffness in the steel-nailed group was reduced to 85 percent of normal. None of these changes were statistically significant.
This study indicates that rigid intramedullary nails cause strain shielding at the anterior, mid-diaphyseal surface of rat femora 12 weeks after insertion. Removal of rigid implants seems to restore the loading configuration immediately. |
| doi_str_mv | 10.3109/17453678909149292 |
| format | Article |
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Testing of femora after removal of implants revealed stiffness of 116 and 103 percent of normal in reamed-only and polyacetal-nailed groups, respectively. Stiffness in the steel-nailed group was reduced to 85 percent of normal. None of these changes were statistically significant.
This study indicates that rigid intramedullary nails cause strain shielding at the anterior, mid-diaphyseal surface of rat femora 12 weeks after insertion. Removal of rigid implants seems to restore the loading configuration immediately.</description><identifier>ISSN: 1745-3674</identifier><identifier>ISSN: 0001-6470</identifier><identifier>EISSN: 1745-3682</identifier><identifier>DOI: 10.3109/17453678909149292</identifier><identifier>PMID: 2750513</identifier><identifier>CODEN: AOSAAK</identifier><language>eng</language><publisher>Basingstoke: Informa UK Ltd</publisher><subject>Animals ; Biological and medical sciences ; Biomechanical Phenomena ; Bone Nails ; Femur - physiopathology ; Femur - surgery ; Male ; Medical sciences ; Methods ; Orthopedic surgery ; Rats ; Rats, Inbred Strains ; Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases ; Time Factors</subject><ispartof>Acta orthopaedica, 1989, Vol.60 (3), p.349-352</ispartof><rights>1989 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted 1989</rights><rights>1990 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c473t-4d8165f46c5bda5bb0478b819785ce087e06fdfce2ba51ab808d83d35af1c2d13</citedby><cites>FETCH-LOGICAL-c473t-4d8165f46c5bda5bb0478b819785ce087e06fdfce2ba51ab808d83d35af1c2d13</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,4024,27923,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=6884405$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/2750513$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Husby, Otto Schnell</creatorcontrib><creatorcontrib>Gjerdet, Nils Roar</creatorcontrib><creatorcontrib>Melster, Anders O.</creatorcontrib><title>Strain shielding 12 weeks after femoral reaming and nailing in rats</title><title>Acta orthopaedica</title><addtitle>Acta Orthop Scand</addtitle><description>The purpose of this study was to investigate the in vivo strain-shielding in rat femora 12 weeks after intramedullary nailing with either flexible or rigid implants. Five days prior to death, unidirectional strain gauge units were implanted on the anterior bone surface bilaterally. Median strain values of reamed only and polyacetal-nailed femora ranged from 67 to 90 percent of the intact side. Removal of polyacetal nails and sham operations gave negligible changes in strain. Strain of the steel-nailed femora was 51 percent of the intact side. Removal of nails increased strain to 91 percent of the intact side.
Testing of femora after removal of implants revealed stiffness of 116 and 103 percent of normal in reamed-only and polyacetal-nailed groups, respectively. Stiffness in the steel-nailed group was reduced to 85 percent of normal. None of these changes were statistically significant.
This study indicates that rigid intramedullary nails cause strain shielding at the anterior, mid-diaphyseal surface of rat femora 12 weeks after insertion. Removal of rigid implants seems to restore the loading configuration immediately.</description><subject>Animals</subject><subject>Biological and medical sciences</subject><subject>Biomechanical Phenomena</subject><subject>Bone Nails</subject><subject>Femur - physiopathology</subject><subject>Femur - surgery</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Methods</subject><subject>Orthopedic surgery</subject><subject>Rats</subject><subject>Rats, Inbred Strains</subject><subject>Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases</subject><subject>Time Factors</subject><issn>1745-3674</issn><issn>0001-6470</issn><issn>1745-3682</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1989</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kF1LwzAUhoMoc05_gBdCL8S7adIkTYreyPALBl6o1-U0OXGdaatJx9i_t2NzIIJXOeR9nkPyEnLK6CVnNL9iSkieKZ3TnIk8zdM9MlzfjXmm0_3drMQhOYpxTinXIqcDMkiVpJLxIZm8dAGqJomzCr2tmveEpckS8SMm4DoMicO6DeCTgFCvY2hs0kDl13PvBejiMTlw4COebM8Rebu_e508jqfPD0-T2-nYCMW7sbCaZdKJzMjSgixLKpQuNcuVlgapVkgzZ53BtATJoNRUW80tl-CYSS3jI3Kx2fsZ2q8Fxq6oq2jQe2iwXcRC5YxmVNEeZBvQhDbGgK74DFUNYVUwWqyLK_4U1ztn2-WLska7M7ZN9fn5NodowLsAjaniDsu0FoLKHrvZYFXj2lDDsg3eFh2sfBt-HP7fK65_6TME380MBCzm7SI0fb3__OEbwbGZ4A</recordid><startdate>1989</startdate><enddate>1989</enddate><creator>Husby, Otto Schnell</creator><creator>Gjerdet, Nils Roar</creator><creator>Melster, Anders O.</creator><general>Informa UK Ltd</general><general>Taylor & Francis</general><scope>IQODW</scope><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>7X8</scope></search><sort><creationdate>1989</creationdate><title>Strain shielding 12 weeks after femoral reaming and nailing in rats</title><author>Husby, Otto Schnell ; Gjerdet, Nils Roar ; Melster, Anders O.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c473t-4d8165f46c5bda5bb0478b819785ce087e06fdfce2ba51ab808d83d35af1c2d13</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1989</creationdate><topic>Animals</topic><topic>Biological and medical sciences</topic><topic>Biomechanical Phenomena</topic><topic>Bone Nails</topic><topic>Femur - physiopathology</topic><topic>Femur - surgery</topic><topic>Male</topic><topic>Medical sciences</topic><topic>Methods</topic><topic>Orthopedic surgery</topic><topic>Rats</topic><topic>Rats, Inbred Strains</topic><topic>Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases</topic><topic>Time Factors</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Husby, Otto Schnell</creatorcontrib><creatorcontrib>Gjerdet, Nils Roar</creatorcontrib><creatorcontrib>Melster, Anders O.</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Acta orthopaedica</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Husby, Otto Schnell</au><au>Gjerdet, Nils Roar</au><au>Melster, Anders O.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Strain shielding 12 weeks after femoral reaming and nailing in rats</atitle><jtitle>Acta orthopaedica</jtitle><addtitle>Acta Orthop Scand</addtitle><date>1989</date><risdate>1989</risdate><volume>60</volume><issue>3</issue><spage>349</spage><epage>352</epage><pages>349-352</pages><issn>1745-3674</issn><issn>0001-6470</issn><eissn>1745-3682</eissn><coden>AOSAAK</coden><abstract>The purpose of this study was to investigate the in vivo strain-shielding in rat femora 12 weeks after intramedullary nailing with either flexible or rigid implants. Five days prior to death, unidirectional strain gauge units were implanted on the anterior bone surface bilaterally. Median strain values of reamed only and polyacetal-nailed femora ranged from 67 to 90 percent of the intact side. Removal of polyacetal nails and sham operations gave negligible changes in strain. Strain of the steel-nailed femora was 51 percent of the intact side. Removal of nails increased strain to 91 percent of the intact side.
Testing of femora after removal of implants revealed stiffness of 116 and 103 percent of normal in reamed-only and polyacetal-nailed groups, respectively. Stiffness in the steel-nailed group was reduced to 85 percent of normal. None of these changes were statistically significant.
This study indicates that rigid intramedullary nails cause strain shielding at the anterior, mid-diaphyseal surface of rat femora 12 weeks after insertion. Removal of rigid implants seems to restore the loading configuration immediately.</abstract><cop>Basingstoke</cop><pub>Informa UK Ltd</pub><pmid>2750513</pmid><doi>10.3109/17453678909149292</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 1745-3674 |
| ispartof | Acta orthopaedica, 1989, Vol.60 (3), p.349-352 |
| issn | 1745-3674 0001-6470 1745-3682 |
| language | eng |
| recordid | cdi_pubmed_primary_2750513 |
| source | MEDLINE; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Animals Biological and medical sciences Biomechanical Phenomena Bone Nails Femur - physiopathology Femur - surgery Male Medical sciences Methods Orthopedic surgery Rats Rats, Inbred Strains Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases Time Factors |
| title | Strain shielding 12 weeks after femoral reaming and nailing in rats |
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