In Vivo Triquetrum-Hamate Kinematics During a Hammering Motion
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چکیده
INTRODUCTION: The triquetrum-hamate (TqH) joint has classically been described as a saddle joint with the hamate (HAM) having a helicoidal or screw shape into which the triquetrum (TRQ) rotates. The kinematics of the TqH joint lacks consensus, however, as some believe the TRQ follows a path on an oval surface. A complete understanding of the normal kinematics of the TqH joint is needed for the development of treatment of pathologic midcarpal motion. Previous kinematic analysis of the TqH joint has been based on measurements taken from two-dimensional radiographs. Three-dimensional (3-D) models generated from CT or MRI have recently been used to describe the TqH joint in flexion/extension (FE) or ulnar/radial (UR) deviation. TqH motion along the dart thrower’s path (DTM), wrist motion from radial extension to ulnar flexion and suggested by some as the most important functional motion of the wrist, remains to be studied. The purpose of this study was to determine the in vivo kinematics of the TRQ with respect to the HAM during a DTM.
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In vivo triquetrum-hamate kinematics through a simulated hammering task wrist motion.
BACKGROUND The shape and kinematics of the triquetrum-hamate joint have been the subject of continued research, as its articulation provides wrist stability and motion. The purpose of this study was to measure the in vivo articulation of the triquetrum-hamate joint as the wrist moves along an important functional wrist motion, the dart thrower's path. METHODS The right wrist of six male and s...
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