0
TECHNICAL PAPERS: Bone/Orthopedics

Comparison of Plate-Screw Systems Used in Mandibular Fracture Reduction: Finite Element Analysis

[+] Author and Article Information
Scott T. Lovald

Manufacturing Engineering Program, University of New Mexico, Albuquerque, NM

Tariq Khraishi1

Mechanical Engineering Department, University of New Mexico, Albuquerque, NMkhraishi@me.unm.edu

Jon Wagner, Bret Baack, James Kelly

Department of Surgery, University of New Mexico, Albuquerque, NM

John Wood

Manufacturing Engineering Program and Mechanical Engineering Department, University of New Mexico, Albuquerque, NM

1

Corresponding author.

J Biomech Eng 128(5), 654-662 (Mar 21, 2006) (9 pages) doi:10.1115/1.2244575 History: Received June 10, 2005; Revised March 21, 2006

A finite element model of the human dentate mandible has been developed to provide a comparison of fixation systems used currently for fracture reduction. Volume domains for cortical bone, cancellous bone, and teeth were created and meshed in ANSYS 8.0 based on IGES curves created from computerized tomography data. A unilateral molar clench was loaded on the model with a fracture gap simulated along the symphysis. Results based on Von Mises stress in cortical and cancellous bone surrounding the screws, and on fracture surface spatial fixation, show some relative differences between different screw-plate systems, yet all were judged to be appropriate in their reduction potential.

FIGURES IN THIS ARTICLE
<>
Copyright © 2006 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Mask creation of osseous materials in Mimics

Grahic Jump Location
Figure 2

Areas skinned along IGES contours, imported into ANSYS

Grahic Jump Location
Figure 3

Meshed mandible with removed section showing materials of cortical bone, cancellous bone, and dentin

Grahic Jump Location
Figure 4

Plate configurations used for stress analyses: (a) ladder, (b) large/small bands, (c) two small bands, (d) and large band

Grahic Jump Location
Figure 5

Volume cortical bone section in the symphyseal region with removed cancellous bone volume showing fixation plate and bicortical and unicortical screws

Grahic Jump Location
Figure 6

Von Mises stress (MPa) in cortical bone surrounding medial screws for configuration A

Grahic Jump Location
Figure 7

Von Mises stress (MPa) along screws for configuration A

Grahic Jump Location
Figure 8

Total displacement of mandible halves (mm)

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In