The goal of this study is to compare the performance of currently available screw types and configurations for rigid sternal fixation. Bone fixation plates were attached to osteoporotic human sternum with cortical or cancellous screws in either a unicortical or bicortical manner. The plates were cyclically loaded transversely (0–50N at 2Hz) for 15,000 cycles; the resulting lateral screw displacement was measured continuously. Bicortical attachment allowed significantly lower initial displacement than unicortical (p = 0.015), whereas cortical screws allowed significantly lower displacement than cancellous screws after long term cycling (p = 0.039). These initial findings indicate that both screw type and cortical purchase are important parameters in the design of a rigid plating system for sternal closure. Cortical screws appear to be more applicable to the osteoporotic sternum, as the cortical shell regions support more screw purchase than the degenerated cancellous part, and bicortical screw purchase appears to decrease screw loosening.
Skip Nav Destination
ASME 2009 Summer Bioengineering Conference
June 17–21, 2009
Lake Tahoe, California, USA
Conference Sponsors:
- Bioengineering Division
ISBN:
978-0-7918-4891-3
PROCEEDINGS PAPER
Comparison of Cortical and Cancellous Screws for Sternal Fixation
Alexander Christakis,
Alexander Christakis
Worcester Polytechnic Institute, Worcester, MA
Search for other works by this author on:
John Dieselman,
John Dieselman
Worcester Polytechnic Institute, Worcester, MA
Search for other works by this author on:
Jonathan Ahn,
Jonathan Ahn
Worcester Polytechnic Institute, Worcester, MA
Search for other works by this author on:
Andrew Sandefer,
Andrew Sandefer
Worcester Polytechnic Institute, Worcester, MA
Search for other works by this author on:
Charles Psoinos,
Charles Psoinos
University of Massachusetts Medical School, Worcester, MA
Search for other works by this author on:
Ronald Ignotz,
Ronald Ignotz
University of Massachusetts Medical School, Worcester, MA
Search for other works by this author on:
Janice Lalikos,
Janice Lalikos
University of Massachusetts Medical School, Worcester, MA
Search for other works by this author on:
Raymond Dunn,
Raymond Dunn
University of Massachusetts Medical School, Worcester, MA
Search for other works by this author on:
Kristen Billiar
Kristen Billiar
Worcester Polytechnic Institute, Worcester, MA
University of Massachusetts Medical School, Worcester, MA
Search for other works by this author on:
Alexander Christakis
Worcester Polytechnic Institute, Worcester, MA
John Dieselman
Worcester Polytechnic Institute, Worcester, MA
Jonathan Ahn
Worcester Polytechnic Institute, Worcester, MA
Andrew Sandefer
Worcester Polytechnic Institute, Worcester, MA
Charles Psoinos
University of Massachusetts Medical School, Worcester, MA
Ronald Ignotz
University of Massachusetts Medical School, Worcester, MA
Janice Lalikos
University of Massachusetts Medical School, Worcester, MA
Raymond Dunn
University of Massachusetts Medical School, Worcester, MA
Kristen Billiar
Worcester Polytechnic Institute, Worcester, MA
University of Massachusetts Medical School, Worcester, MA
Paper No:
SBC2009-206368, pp. 757-758; 2 pages
Published Online:
July 19, 2013
Citation
Christakis, A, Dieselman, J, Ahn, J, Sandefer, A, Psoinos, C, Ignotz, R, Lalikos, J, Dunn, R, & Billiar, K. "Comparison of Cortical and Cancellous Screws for Sternal Fixation." Proceedings of the ASME 2009 Summer Bioengineering Conference. ASME 2009 Summer Bioengineering Conference, Parts A and B. Lake Tahoe, California, USA. June 17–21, 2009. pp. 757-758. ASME. https://doi.org/10.1115/SBC2009-206368
Download citation file:
5
Views
Related Proceedings Papers
Related Articles
A New System to Improve Screw Fixation to Bones
J. Med. Devices (December,2011)
Biomechanical Alterations in Intact Osteoporotic Spine Due to Synthetic Augmentation: Finite Element Investigation
J Biomech Eng (August,2007)
Sensitivity of Vertebral Compressive Strength to Endplate Loading Distribution
J Biomech Eng (October,2006)
Related Chapters
Various Structures
Design of Plate and Shell Structures
Fatigue Analysis in the Connecting Rod of MF285 Tractor by Finite Element Method
International Conference on Advanced Computer Theory and Engineering, 4th (ICACTE 2011)
Personnel and Requirements
Heat Exchanger Engineering Techniques