A biomechanical study comparing plate fixation using unicortical and bicortical screws in transverse metacarpal fracture models subjected to cyclic loading
The use of bicortical screws to fix metacarpal fractures has been suggested to provide no added biomechanical advantage over unicortical screw fixation. However, this was only demonstrated in static loading regimes, which may not be representative of biological conditions. The present study was done...
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| Veröffentlicht in: | The Journal of hand surgery, European volume European volume, 2012-06, Vol.37 (5), p.396-401 |
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| container_title | The Journal of hand surgery, European volume |
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| creator | Afshar, R. Fong, T. S. Latifi, M. Hadi Kanthan, S. R. Kamarul, T. |
| description | The use of bicortical screws to fix metacarpal fractures has been suggested to provide no added biomechanical advantage over unicortical screw fixation. However, this was only demonstrated in static loading regimes, which may not be representative of biological conditions. The present study was done to determine whether similar outcomes are obtained when cyclic loading is applied. Transverse midshaft osteotomies were created in 20 metacarpals harvested from three cadavers. Fractures were stabilised using 2.0 mm mini fragment plates fixed with either bicortical or unicortical screw fixation. These fixations were tested to failure with a three-point bending cyclic loading protocol using an electromechanical microtester and a 1 kN load cell. The mean load to failure was 370 N (SD 116) for unicortical fixation and 450 N (SD 135) for bicortical fixation. Significant differences between these two constructs were observed. A biomechanical advantage was found when using bicortical screws in metacarpal fracture plating. |
| doi_str_mv | 10.1177/1753193411424557 |
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S.</creatorcontrib><creatorcontrib>Latifi, M. Hadi</creatorcontrib><creatorcontrib>Kanthan, S. R.</creatorcontrib><creatorcontrib>Kamarul, T.</creatorcontrib><title>A biomechanical study comparing plate fixation using unicortical and bicortical screws in transverse metacarpal fracture models subjected to cyclic loading</title><title>The Journal of hand surgery, European volume</title><addtitle>J Hand Surg Eur Vol</addtitle><description>The use of bicortical screws to fix metacarpal fractures has been suggested to provide no added biomechanical advantage over unicortical screw fixation. However, this was only demonstrated in static loading regimes, which may not be representative of biological conditions. The present study was done to determine whether similar outcomes are obtained when cyclic loading is applied. Transverse midshaft osteotomies were created in 20 metacarpals harvested from three cadavers. Fractures were stabilised using 2.0 mm mini fragment plates fixed with either bicortical or unicortical screw fixation. These fixations were tested to failure with a three-point bending cyclic loading protocol using an electromechanical microtester and a 1 kN load cell. The mean load to failure was 370 N (SD 116) for unicortical fixation and 450 N (SD 135) for bicortical fixation. Significant differences between these two constructs were observed. A biomechanical advantage was found when using bicortical screws in metacarpal fracture plating.</description><subject>Biological and medical sciences</subject><subject>Biomechanical Phenomena</subject><subject>Biomechanics. Biorheology</subject><subject>Bone Density</subject><subject>Bone Plates</subject><subject>Bone Screws</subject><subject>Diseases of the osteoarticular system</subject><subject>Equipment Design</subject><subject>Equipment Failure Analysis</subject><subject>Fracture Fixation, Internal - instrumentation</subject><subject>Fractures, Bone - physiopathology</subject><subject>Fractures, Bone - surgery</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Humans</subject><subject>Materials Testing</subject><subject>Medical sciences</subject><subject>Metacarpus - injuries</subject><subject>Osteotomy</subject><subject>Tissues, organs and organisms biophysics</subject><issn>1753-1934</issn><issn>2043-6289</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp1kUFv1DAQhS1ERZfCnRPyBYlLqB0nsX2sqlKQKnGBczRxJsWrJA4eB9jfwp_F6S5FQuJked73ZqT3GHslxTsptb6UulbSqkrKqqzqWj9hu1JUqmhKY5-y3SYXm37OnhPthaiNlc0zdl6WQlpr7I79uuKdDxO6rzB7ByOntPYH7sK0QPTzPV9GSMgH_xOSDzNfaRuumQ0xPRhg7vOKxy-5iD-I-5mnCDN9x0jIJ0zgIC5ZHyK4tMY8Cz2OxGnt9ugS9jwF7g5u9I6PAfp85gU7G2AkfHl6L9iX9zefrz8Ud59uP15f3RWuUioVlRxAS9AloAXsTKNEV2uRgzEAom_cIJrBDFWprK56NLWpG4fKVSXKxiqtLtjb494lhm8rUmonTw7HEWYMK7VSSKNqo43KqDiiLgaiiEO7RD9BPGSo3Spp_60kW16ftq_dhP2j4U8HGXhzAoBygjmg2Xn6y9U216k2rjhyBPfY7sMa55zK_w__Bik1o9c</recordid><startdate>20120601</startdate><enddate>20120601</enddate><creator>Afshar, R.</creator><creator>Fong, T. 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R. ; Kamarul, T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c433t-41fa71a72ae9aeb8630b5703198aa0d6cf06f8f423974de85856ce3c42e169373</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Biological and medical sciences</topic><topic>Biomechanical Phenomena</topic><topic>Biomechanics. Biorheology</topic><topic>Bone Density</topic><topic>Bone Plates</topic><topic>Bone Screws</topic><topic>Diseases of the osteoarticular system</topic><topic>Equipment Design</topic><topic>Equipment Failure Analysis</topic><topic>Fracture Fixation, Internal - instrumentation</topic><topic>Fractures, Bone - physiopathology</topic><topic>Fractures, Bone - surgery</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Humans</topic><topic>Materials Testing</topic><topic>Medical sciences</topic><topic>Metacarpus - injuries</topic><topic>Osteotomy</topic><topic>Tissues, organs and organisms biophysics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Afshar, R.</creatorcontrib><creatorcontrib>Fong, T. S.</creatorcontrib><creatorcontrib>Latifi, M. Hadi</creatorcontrib><creatorcontrib>Kanthan, S. 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R.</au><au>Kamarul, T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A biomechanical study comparing plate fixation using unicortical and bicortical screws in transverse metacarpal fracture models subjected to cyclic loading</atitle><jtitle>The Journal of hand surgery, European volume</jtitle><addtitle>J Hand Surg Eur Vol</addtitle><date>2012-06-01</date><risdate>2012</risdate><volume>37</volume><issue>5</issue><spage>396</spage><epage>401</epage><pages>396-401</pages><issn>1753-1934</issn><eissn>2043-6289</eissn><abstract>The use of bicortical screws to fix metacarpal fractures has been suggested to provide no added biomechanical advantage over unicortical screw fixation. However, this was only demonstrated in static loading regimes, which may not be representative of biological conditions. The present study was done to determine whether similar outcomes are obtained when cyclic loading is applied. Transverse midshaft osteotomies were created in 20 metacarpals harvested from three cadavers. Fractures were stabilised using 2.0 mm mini fragment plates fixed with either bicortical or unicortical screw fixation. These fixations were tested to failure with a three-point bending cyclic loading protocol using an electromechanical microtester and a 1 kN load cell. The mean load to failure was 370 N (SD 116) for unicortical fixation and 450 N (SD 135) for bicortical fixation. Significant differences between these two constructs were observed. A biomechanical advantage was found when using bicortical screws in metacarpal fracture plating.</abstract><cop>London, England</cop><pub>SAGE Publications</pub><pmid>22019989</pmid><doi>10.1177/1753193411424557</doi><tpages>6</tpages></addata></record> |
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| subjects | Biological and medical sciences Biomechanical Phenomena Biomechanics. Biorheology Bone Density Bone Plates Bone Screws Diseases of the osteoarticular system Equipment Design Equipment Failure Analysis Fracture Fixation, Internal - instrumentation Fractures, Bone - physiopathology Fractures, Bone - surgery Fundamental and applied biological sciences. Psychology Humans Materials Testing Medical sciences Metacarpus - injuries Osteotomy Tissues, organs and organisms biophysics |
| title | A biomechanical study comparing plate fixation using unicortical and bicortical screws in transverse metacarpal fracture models subjected to cyclic loading |
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