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The centerpiece of the Orthopaedic Spinal Research Laboratory is the six degree
of freedom (DOF) spine simulator, designed by mechanical engineer, Jeff Gordon,
MS. and Bryan Cunningham, MSc. |
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Six Degree of Freedom in Biomechanical Testing Laboratory |
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The six degree of freedom spine simulator can produce up to 64 Nm of flexion/extension, lateral bending, and/or axial rotation torques. Each of the three axes – X, Y and Z – is controlled independently to induce a torque profile, to lock, or to operate on bearings - allowing inherently coupled rotational spinal motions to occur unconstrained. Translations in all three axes – X, Y and Z – can be unconstrained or locked if required. |
Schematic Illustration of Six Degree
of Freedom Spine Simulator |
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The simulator also allows application of a follower load to simulate body weight and trunk loads. Segmental motion tracking is performed using an optoelectronic system (Optotrak, Northern Digital) which can record rotations to within ±0.1 degree and translations to within ±0.1 mm . A fluoroscopic image intensifier can provide real-time images during testing.
Visit "Biomechanical Testing/Fluoroscopic Imaging" for additional information. |
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Spine Simulator |
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Six Degree of
Freedom Spine
Simulator in use with specimen |
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