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20. MOTION-BASED JOINT COORDINATE SYSTEMS FOR THE ELBOW: A NEW METHOD FOR REDUCING VARIABILITY OF FLEXION KINEMATICS



Abstract

Results: Repeatability of creating motion-based JCS was less than 1 mm and 1° in all directions. The inter-specimen standard-deviations of position and orientation measurements were smaller for the motion-based than for the anatomy-based JCS in every direction and for every specimen (p< 0.006). The ulno-humeral varus angle and internal/external rotation kinematics of active flexion showed less inter-specimen variability when calculated using motion-based JCS (p< 0.05).

Correspondence should be addressed to CEO Doug C. Thomson. Email: doug@canorth.org