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COSMOS Helps Develop Artificial Jaw Joints
Company
Okayama University,
Faculty of Dentistry |
Industry
Medical |
Location
Japan |
Product Used
COSMOSWorks™ |
Type of Analysis
Linear Static,
Nonlinear |
More Details
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Model of skull
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The Challenge
The Faculty of Dentistry, Oral Surgery
Department at Okayama University has developed an artificial jaw joint
for use in patients suffering from broken jaw joints due to chronic
rheumatoid arthritis, or who suffer from breathing difficulty caused
by a retreated lower jawbone. Over the past nine years they have carried
out total-replacement arthroplasty using an artificial jaw joint in
an attempt to recover the proper function and shape of the mouth. However,
some patients reported insufficient movement of the lower jaw, thus
demonstrating a need to develop a new artificial jaw joint.
The Solution
To accomplish this goal, doctors Tomoaki Kawamoto and Toshio Sugahara
turned to SolidWorks2000, a three-dimensional CAD software program capable
of creating models having free-form surfaces, and COSMOSWorks, a program
that performs stress analysis for these models.
Different model variations were created
using different plate/screw materials, and static analysis was performed
in COSMOSWorks to see how using different materials would affect stress
generated as a result of chewing.
For the analysis, plates and screws
made of three types of materials were examined: titanium, stainless
steel, and poly-L lactic acid (PLLA) with tissue absorbability.
Summary and Metrics:
- 3-D mandibular fracture model was analyzed with a resulting mesh
model of 42,387 nodes and 27,876 elements
Special thanks to: Tomoaki Kawamoto
and Toshio Sugahara at the Faculty of Dentistry, Oral Surgery Department
at Okayama University
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