Effect of the Length of the superficial plate in stacked veterinary cuttable plate constructs: An in vitro study on the bending strength and stiffness, and on the strain distribution

dc.contributor.advisorGibson, Thomas William George
dc.contributor.advisorAllen, Dana G.
dc.contributor.authorBichot, Sylvain
dc.date.accessioned2012-01-06T16:41:17Z
dc.date.available2012-01-06T16:41:17Z
dc.date.copyright2011-12
dc.date.created2011-12-19
dc.date.issued2012-01-06
dc.degree.departmentDepartment of Clinical Studiesen_US
dc.degree.grantorUniversity of Guelphen_US
dc.degree.nameDoctor of Veterinary Scienceen_US
dc.degree.programmeVeterinary Scienceen_US
dc.description.abstractThis thesis investigated the effect of the length of the superficial plate on the mechanical properties of a stacked-plate construct made with 2.0-2.7 Veterinary Cuttable platesTM (VCP). Stacking VCP increases construct stiffness compared to using a single VCP but increases stress protection and concentrates stress at the extremities of the implants. We hypothesized that shortening the superficial plate would not reduce the stiffness of the construct, and would reduce stress concentration at the plate ends. A fracture gap model was created with a bone surrogate (copolymer acetal rods), stacked 2.0-2.7 VCP and 2.7 screws. The constructs consisted of an 11-hole VCP bottom plate and a 5-, 7-, 9- or 11-hole VCP superficial plate. In phase one, 5 of each construct were randomly tested for failure in 4-point bending and axial loading. Stiffness, load at yield, and work until failure were measured. In phase two, strains were recorded during elastic deformation for each configuration. During both testing methods, stiffness, load at yield and work to failure progressively decreased when decreasing the length of the superficial plate. No statistically significant differences were obtained for load at yield in 4-point bending and work to failure in axial loading. The strain within the implant over the gap increased as the length of the superficial plate decreased. Shortening the superficial plate reduces the stiffness and strength of the construct, and decreases stress concentration at the implant ends. As the cross section of the implant covering the gap remained constant, friction between the plates may play a role in the mechanical properties of stacked VCP.en_US
dc.description.sponsorshipSynthes Canada
dc.description.sponsorshipOntario Veterinary College Pet Trust Fund
dc.identifier.urihttp://hdl.handle.net/10214/3240
dc.language.isoenen_US
dc.publisherUniversity of Guelphen_US
dc.rights.licenseAll items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dc.subjectVeterinary Cuttable plateen_US
dc.subjectStacked platesen_US
dc.subjectBending stiffnessen_US
dc.subjectBending strengthen_US
dc.subjectStrain gaugeen_US
dc.titleEffect of the Length of the superficial plate in stacked veterinary cuttable plate constructs: An in vitro study on the bending strength and stiffness, and on the strain distributionen_US
dc.typeThesisen_US

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