The New 4-Dimensional Computed Tomographic Scanner Allows Dynamic Visualization and Measurement of Normal Acromioclavicular Joint Motion in an Unloaded and Loaded Condition

Abstract

Four-dimensional computed tomographic scans record the motion pattern of an asymptomatic AC joint and demonstrated that in adduction plus resisted elevation of the arm, the main movement of the AC joint is posterior and superior translation of the clavicle.