Faculty Advisor

Billiar, Kristen

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.

Publisher

Worcester Polytechnic Institute

Date Accepted

April 2006

Major

Biomedical Engineering

Project Type

Major Qualifying Project

Accessibility

Unrestricted

Advisor Department

Biomedical Engineering

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