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Bending, Torsional, and Pullout Strength of Compression Screws in Cadaver Foot and Ankle Specimens

[+] Author Affiliations
Ferris M. Pfeiffer

Brenoak Labs LLC, Columbia, MO

Paul S. Shurnas

Columbia Orthopaedic Group; COG Clinical Research Group LLC, Columbia, MO

Dennis L. Abernathie

Brenoak Labs LLC; Columbia Orthopaedic Group; COG Clinical Research Group LLC, Columbia, MO

James A. Ronan

COG Clinical Research Group LLC, Columbia, MO

Paper No. BioMed2008-38064, pp. 21-22; 2 pages
doi:10.1115/BioMed2008-38064
From:
  • ASME 2008 3rd Frontiers in Biomedical Devices Conference
  • ASME 2008 3rd Frontiers in Biomedical Devices Conference
  • Irvine, California, USA, June 18–20, 2008
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4833-7 | eISBN: 0-7918-3823-4
  • Copyright © 2008 by ASME

abstract

It has been well supported in the literature that using compression screws is the preferred method to achieve fixation of an arthrodesis [1, 2]. Indications for isolated subtalar arthrodesis include trauma, arthritis, talocalcaneal coalition, adult acquired flatfoot, posterior tibial tendon dysfunction, and Charcot neuroarthropathy [3, 4]. With the increase in bone screw shapes and designs, there is a desire to achieve the best compression generated by a type of screw so as to promote excellent bone healing and outcome for the patient; this will also allow the stability of the construct achieved by the screw and its placement to be determined. As indicated by Wheeler, et. al.[5] screw choice, compression, stability and loading can be very important when it comes to healing of fractures in small bones.

Copyright © 2008 by ASME
Topics: Screws , Compression

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