Finite element analysis of the initial stability of subtalar arthrodesis with double-screw fixation / 南方医科大学学报
Journal of Southern Medical University
;
(12): 1588-1591, 2012.
Article
in Chinese
| WPRIM
| ID: wpr-352379
ABSTRACT
<p><b>OBJECTIVE</b>To assess the optimal configuration of double-screw fixation for subtalar arthrodesis using finite element analysis.</p><p><b>METHODS</b>Three-dimensional finite element double-screw models of subtalar arthrodesis were reconstructed using Mimics 13.0, Geomagic 10.0 and solid works software based on the 3-D images of the volunteer's right foot. The external and internal rotation torques of 4 N·m were applied, and the micromotion at the bone-to-bone interface were measured to evaluate the initial stability of subtalar arthrodesis.</p><p><b>RESULTS</b>A neck screw plus an anterolateral dome screw was the most stable model. The peak micromotion at the fusion site of this fixation configuration were 41.67mnplus;0.49 and 42.64mnplus;0.75 µm in response to the respectively. A neck screw plus a posteromedial dome screw was the least stable model, with peak micromotion at the bone-to-bone interface of 61.76mnplus;1.00 and 62.32mnplus;0.90 µm, respectively.</p><p><b>CONCLUSION</b>A neck screw plus an anterolateral dome screw is the best fixation configuration while a neck screw plus a posteromedial screw provides the least stability of subtalar arthrodesis. Three-dimensional finite element models allow effective preoperative planning of the screw number and placement.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Arthrodesis
/
General Surgery
/
Bone Screws
/
Software
/
Diagnostic Imaging
/
Subtalar Joint
/
Tomography, X-Ray Computed
/
Internal Fixators
/
Finite Element Analysis
/
Imaging, Three-Dimensional
Type of study:
Diagnostic study
Limits:
Adult
/
Humans
Language:
Chinese
Journal:
Journal of Southern Medical University
Year:
2012
Type:
Article
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