SYMPOSIA PAPER Published: 01 January 1994
STP12217S

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

Source

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.

Author Information

Heiner, AD
Case Western Reserve University, Cleveland, OH
Brown, SA
Case Western Reserve University, Cleveland, OH
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Details
Developed by Committee: F04
Pages: 10–22
DOI: 10.1520/STP12217S
ISBN-EB: 978-0-8031-5275-5
ISBN-13: 978-0-8031-1897-3