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A number of studies in our laboratory have assessed different
fixation techniques for fractures of the elbow and wrist. Simulated fractures
are created in cadaveric specimens and then reconstructed using different
techniques of fracture fixation. Structural stiffness of the reconstruction is
measured (usually with an electromagnetic tracking system) for simulated
loading.
Biomechanical analysis of fixation of the fractured
olecranon of the elbow. Receivers of an electromagnetic tracking system are
attached to measure motion in an anatomical reference system.
Our wrist testing apparatus was employed to study
different techniques to "fix" wrist fractures. Computer-controlled pneumatic
actuators were used to load various tendons that cross the wrist and elbow and
hence simulate different wrist motions. The "Flock of Birds" electromagnetic
tracking system was used to measure the stability across a simulated fracture in
specimens. Pins, plates and external fixation systems have all been
tested.
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