Worcester Polytechnic Institute Electronic Projects Collection

Title page for E-project-042606-150133

Project TypeMQP
Submission date2006-04-26
Authors
  • Danya Marie Decoteau, BE
  • Danielle L Flannery, BE
  • Alison R Hart, BE
  • Helena C Zec, BE
    • URNE-project-042606-150133
    SponsorUMASS Medical School
    TitleComparison of Cancellous and Cortical Bone Screws for Sternal Application
    Advisor
  • Billiar, Kristen, BE
    • Availability unrestricted

    Abstract

    Rigid sternal fixation uses cortical-screw/plate systems; however, the sternum is predominately cancellous bone. We hypothesized cancellous screws would provide better fixation in screw pullout and cyclic fatigue tests. Maximum pullout forces showed mean forces for cancellous screws were significantly higher ( 67.217710.23N) than for cortical (28.917711.74N). After 25,000 cycles, the cancellous system reached 1.16mm distraction, the cortical-screw/ plate system reached 1.55mm. These results indicate the superior performance of cancellous screws over cortical. Further research is needed to confirm trends.

    Files
  • FINAL_REPORT_MQP.pdf

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