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Testing stiffness and yield strength of clavicular fracture fixation devices.

The purpose of this project was to determine the stiffness and yield strength of five bone plates, devices used in surgery to heal fractured clavicles. Six samples of five devices (2.7 DC, 3.5 DC, 3.5 LDC, 3.5 Recon, and 3.5 CRecon) were tested in the Instron 8874 Biaxial Mechanical Testing System in both cantilever bending and torsion. Two plates showed significantly lower stiffness values than the other plates. 3.5 Recon showed the lowest bending stiffness value at 11.123 N/mm, while 2.7 DC showed the second lowest value at 14.132 N/mm. 2.7 DC showed the lowest torsional stiffness value at 0.251 N-mm/ degree, while 3.7 Recon showed the second lowest value at 0.312 N-mm/degree. Clinical studies will determine whether the lower or the higher stiffness values function better in the body.
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Author:Bowers, Lauren
Publication:Bulletin of the South Carolina Academy of Science
Article Type:Brief article
Geographic Code:1USA
Date:Jan 1, 2005
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