STP1217

    Effects of Design and Screw Torque on Stresses in Spinal and Fracture Fixation Plates: A Photoelastic Study

    Published: Jan 1994


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    Abstract

    The stresses on an orthopaedic device are dependent on the dimensional design of the device and the applied loads. The stresses on spinal plates and fracture fixation plates were studied using photoelastic stress analysis. Photoelastic spinal plate models revealed the areas of stress concentration and the expansion behavior of the plates, when a screw was screwed down into a plate slot. Photoelastic fracture fixation plate models attached to bone models showed relative stresses as the amount of bending, screw tightness, plate width, and hole spacing were varied. This photoelastic study and others like it can evaluate potential designs or design changes for orthopaedic devices.

    Keywords:

    device design, fracture fixation plates, photoelastic stress analysis, polymer composites, spinal plates, stress concentrations


    Author Information:

    Heiner, AD
    Graduate student and Associate professor, Case Western Reserve University, Cleveland, OH

    Brown, SA
    Graduate student and Associate professor, Case Western Reserve University, Cleveland, OH


    Paper ID: STP12217S

    Committee/Subcommittee: F04.02

    DOI: 10.1520/STP12217S


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