Failure of femoral head fixation: a cadaveric analysis of lag screw cut-out with the gamma locking nail and AO dynamic hip screw
The most commonly reported failure mode of sliding hip screws in published literature is cut-out of the lag screw. This study investigates the resistance to failure of the femoral head, with lag screws used in two types of sliding hip screws, the gamma locking nail (Howmedica) and the dynamic hip sc...
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| Veröffentlicht in: | Injury 1997-06, Vol.28 (5), p.337-341 |
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| creator | Haynes, R.C. Pöll, R.G. Miles, A.W. Weston, R.B. |
| description | The most commonly reported failure mode of sliding hip screws in published literature is cut-out of the lag screw. This study investigates the resistance to failure of the femoral head, with lag screws used in two types of sliding hip screws, the gamma locking nail (Howmedica) and the dynamic hip screw (DHS) (Synthes). The investigation consisted of biomechanical tests under static loading conditions on 12 pairs of cadaveric femoral heads, to establish the failure loads due to screw cut-out for the two implant lag screws. The gamma nail appeared to reduce the tendency to cut-out in the osteoporotic bone (soft) associated with elderly patients in whom these devices are commonly used (p |
| doi_str_mv | 10.1016/S0020-1383(97)00035-1 |
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This study investigates the resistance to failure of the femoral head, with lag screws used in two types of sliding hip screws, the gamma locking nail (Howmedica) and the dynamic hip screw (DHS) (Synthes). The investigation consisted of biomechanical tests under static loading conditions on 12 pairs of cadaveric femoral heads, to establish the failure loads due to screw cut-out for the two implant lag screws. The gamma nail appeared to reduce the tendency to cut-out in the osteoporotic bone (soft) associated with elderly patients in whom these devices are commonly used (p<0.05). In high density bone (hard) the gamma lag screw also appeared to be stronger, because the DHS showed a tendency to bend. 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Equipments</subject><ispartof>Injury, 1997-06, Vol.28 (5), p.337-341</ispartof><rights>1997</rights><rights>1998 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c441t-b3dc2205281b04403c8fd0ec3958efd504d69e554b69f5f7125943599e59f0103</citedby><cites>FETCH-LOGICAL-c441t-b3dc2205281b04403c8fd0ec3958efd504d69e554b69f5f7125943599e59f0103</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0020-1383(97)00035-1$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2088893$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/9764228$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Haynes, R.C.</creatorcontrib><creatorcontrib>Pöll, R.G.</creatorcontrib><creatorcontrib>Miles, A.W.</creatorcontrib><creatorcontrib>Weston, R.B.</creatorcontrib><title>Failure of femoral head fixation: a cadaveric analysis of lag screw cut-out with the gamma locking nail and AO dynamic hip screw</title><title>Injury</title><addtitle>Injury</addtitle><description>The most commonly reported failure mode of sliding hip screws in published literature is cut-out of the lag screw. This study investigates the resistance to failure of the femoral head, with lag screws used in two types of sliding hip screws, the gamma locking nail (Howmedica) and the dynamic hip screw (DHS) (Synthes). The investigation consisted of biomechanical tests under static loading conditions on 12 pairs of cadaveric femoral heads, to establish the failure loads due to screw cut-out for the two implant lag screws. The gamma nail appeared to reduce the tendency to cut-out in the osteoporotic bone (soft) associated with elderly patients in whom these devices are commonly used (p<0.05). In high density bone (hard) the gamma lag screw also appeared to be stronger, because the DHS showed a tendency to bend. The larger diameter of the gamma nail lag screw resists bending and appears to reduce the risk of cut-out compared with the DHS.</description><subject>Aged</subject><subject>Aged, 80 and over</subject><subject>Biological and medical sciences</subject><subject>Biomechanical Phenomena</subject><subject>Bone Nails</subject><subject>Bone Screws</subject><subject>Cadaver</subject><subject>Equipment Failure Analysis</subject><subject>Female</subject><subject>Femur Head - injuries</subject><subject>Femur Head - surgery</subject><subject>Fracture Fixation, Internal - instrumentation</subject><subject>Fracture Fixation, Internal - methods</subject><subject>Hip Fractures - surgery</subject><subject>Humans</subject><subject>Male</subject><subject>Medical sciences</subject><subject>Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases</subject><subject>Technology. Biomaterials. 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Transplantations, organ and tissue grafts. Graft diseases</topic><topic>Technology. Biomaterials. Equipments</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Haynes, R.C.</creatorcontrib><creatorcontrib>Pöll, R.G.</creatorcontrib><creatorcontrib>Miles, A.W.</creatorcontrib><creatorcontrib>Weston, R.B.</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>Injury</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Haynes, R.C.</au><au>Pöll, R.G.</au><au>Miles, A.W.</au><au>Weston, R.B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Failure of femoral head fixation: a cadaveric analysis of lag screw cut-out with the gamma locking nail and AO dynamic hip screw</atitle><jtitle>Injury</jtitle><addtitle>Injury</addtitle><date>1997-06-01</date><risdate>1997</risdate><volume>28</volume><issue>5</issue><spage>337</spage><epage>341</epage><pages>337-341</pages><issn>0020-1383</issn><eissn>1879-0267</eissn><coden>INJUBF</coden><abstract>The most commonly reported failure mode of sliding hip screws in published literature is cut-out of the lag screw. This study investigates the resistance to failure of the femoral head, with lag screws used in two types of sliding hip screws, the gamma locking nail (Howmedica) and the dynamic hip screw (DHS) (Synthes). The investigation consisted of biomechanical tests under static loading conditions on 12 pairs of cadaveric femoral heads, to establish the failure loads due to screw cut-out for the two implant lag screws. The gamma nail appeared to reduce the tendency to cut-out in the osteoporotic bone (soft) associated with elderly patients in whom these devices are commonly used (p<0.05). In high density bone (hard) the gamma lag screw also appeared to be stronger, because the DHS showed a tendency to bend. The larger diameter of the gamma nail lag screw resists bending and appears to reduce the risk of cut-out compared with the DHS.</abstract><cop>Oxford</cop><pub>Elsevier Ltd</pub><pmid>9764228</pmid><doi>10.1016/S0020-1383(97)00035-1</doi><tpages>5</tpages></addata></record> |
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| subjects | Aged Aged, 80 and over Biological and medical sciences Biomechanical Phenomena Bone Nails Bone Screws Cadaver Equipment Failure Analysis Female Femur Head - injuries Femur Head - surgery Fracture Fixation, Internal - instrumentation Fracture Fixation, Internal - methods Hip Fractures - surgery Humans Male Medical sciences Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases Technology. Biomaterials. Equipments |
| title | Failure of femoral head fixation: a cadaveric analysis of lag screw cut-out with the gamma locking nail and AO dynamic hip screw |
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