The influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical study

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dc.contributor.advisorLaubscher, Maritzen_ZA
dc.contributor.authorThiart, Gerharden_ZA
dc.date.accessioned2018-02-13T08:39:17Z
dc.date.available2018-02-13T08:39:17Z
dc.date.issued2017en_ZA
dc.description.abstractBackground: The Ilizarov external fixator (IEF) is frequently used in trauma and elective orthopaedics. Many of its biomechanical variables (ring size; wire diameter; wire number; half pins versus wires; etc.) and their influence on stability and stiffness have been investigated. There is however a paucity in the literature regarding the influence of the connecting rod numbers and configurations between the rings on IEF stability. Objectives: Primarily to compare the stability between four and three rod IEF configurations. Secondarily to assess the difference in stability between symmetrical and asymmetrical spacing of the IEF rods. Methods: A custom jig was designed to facilitate mounting of a basic two ring IEF in a hydraulic press. Controlled centre and off centre (thus simulated bending) axial loading was then applied across the frame. The configurations were loaded up to 4000 Newtons. The frame deformation was plotted and the data was then analysed and interpreted. Results: Negligible differences were observed between different four and three rod configurations as long as the applied force at the loading point (LP) was within the area of support (AOS) created by the rods. The different four rod constructs were always more stable than the three rod constructs during bending. Conclusions: There is comparable stiffness between a four rod and a three rod IEF construct as long as the loading point (LP) is within the area of support (AOS) created by the rods. A four rod IEF is stiffer than a three rod IEF in bending.en_ZA
dc.identifier.apacitationThiart, G. (2017). <i>The influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical study</i>. (Thesis). University of Cape Town ,Faculty of Health Sciences ,Department of Health and Rehabilitation Sciences. Retrieved from http://hdl.handle.net/11427/27557en_ZA
dc.identifier.chicagocitationThiart, Gerhard. <i>"The influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical study."</i> Thesis., University of Cape Town ,Faculty of Health Sciences ,Department of Health and Rehabilitation Sciences, 2017. http://hdl.handle.net/11427/27557en_ZA
dc.identifier.citationThiart, G. 2017. The influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical study. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Thiart, Gerhard AB - Background: The Ilizarov external fixator (IEF) is frequently used in trauma and elective orthopaedics. Many of its biomechanical variables (ring size; wire diameter; wire number; half pins versus wires; etc.) and their influence on stability and stiffness have been investigated. There is however a paucity in the literature regarding the influence of the connecting rod numbers and configurations between the rings on IEF stability. Objectives: Primarily to compare the stability between four and three rod IEF configurations. Secondarily to assess the difference in stability between symmetrical and asymmetrical spacing of the IEF rods. Methods: A custom jig was designed to facilitate mounting of a basic two ring IEF in a hydraulic press. Controlled centre and off centre (thus simulated bending) axial loading was then applied across the frame. The configurations were loaded up to 4000 Newtons. The frame deformation was plotted and the data was then analysed and interpreted. Results: Negligible differences were observed between different four and three rod configurations as long as the applied force at the loading point (LP) was within the area of support (AOS) created by the rods. The different four rod constructs were always more stable than the three rod constructs during bending. Conclusions: There is comparable stiffness between a four rod and a three rod IEF construct as long as the loading point (LP) is within the area of support (AOS) created by the rods. A four rod IEF is stiffer than a three rod IEF in bending. DA - 2017 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2017 T1 - The influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical study TI - The influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical study UR - http://hdl.handle.net/11427/27557 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/27557
dc.identifier.vancouvercitationThiart G. The influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical study. [Thesis]. University of Cape Town ,Faculty of Health Sciences ,Department of Health and Rehabilitation Sciences, 2017 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/27557en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Health and Rehabilitation Sciencesen_ZA
dc.publisher.facultyFaculty of Health Sciencesen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherOrthopaedic Surgeryen_ZA
dc.titleThe influence of different connecting rod configurations on the stability of the Ilizarov Frame: A biomechanical studyen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMMeden_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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