Effects of axial load on in vivo scaphoid and lunate kinematics using four-dimensional computed tomography
Michelle Brinkhorst, Geert J. Streekstra, Joost van Rosmalen, Simon D. Strackee, Steven E. R. Hovius
Abstract
This in vivo study investigated the effect of axial load on lunate and scaphoid kinematics during flexion-extension and radial-ulnar deviation of the uninjured wrist using four-dimensional computed tomography. We found that applying axial load to the wrist results in a more flexed, radially deviated and pronated position of the lunate and scaphoid during flexion-extension of the wrist compared with when no load is applied. A larger pronation and supination range of the lunate and scaphoid was seen when the wrist was flexed and extended under axial load, whereas a larger flexion and extension range of the lunate and scaphoid occurred during radial-ulnar deviation of the wrist when axial load was applied.