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- W2022173157 abstract "<h2>Abstract</h2> We conducted a biomechanical study of changes in parameters of wrist motor tendons in fractures of the distal radius in 7 cadaveric extremities. Extra-articular distal radius fractures were simulated by distal radius osteotomy and fracture angulation was maintained by external fixators. Eight positions of the distal radius fractures were studied: dorsal angulation of 10°, 20°, 30°, and 40° and radial angulation of 5°, 10°, 15°, and 20°. Dorsal and radial angulation of the fractures were measured with respect to the shaft of the radius. Excursions of 5 principal wrist motor tendons extensor carpi radialis longus, extensor carpi radialis brevis, extensor carpi ulnaris, flexor carpi radialis, and flexor carpi ulnaris were recorded simultaneously with wrist joint angulation using a computer-assisted recording system. Data were collected from intact wrists and from wrists with fractures at each of 8 positions of angulation during wrist flexion and extension and radical and ulnar deviation. Moment arm of the wrist motor tendons was derived from tendon excursion and joint angulation. The results demonstrated that excursions and moment arms of principal wrist motor tendons are significantly affected by dorsal and radial angulation of distal radius fractures. Amplitude of changes in moment arms increased as the deformities became more severe. Statistical analysis revealed that dorsal angulation of 10° or more significantly affected moment arms of all the prime wrist motors. Dorsal angulation of 30° or 40° changed the moment arms greatly. Radial angulation of 5° did not affect moment arms of the tendons and angulation over 10° had a statistically significant effect on the tendons. We conclude that deformities of distal radius fractures have a significant influence on the biomechanics of the wrist motors. (J Hand Surg 1999;24A:121–132. Copyright © 1999 by the American Society for Surgery of the Hand.)" @default.
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- W2022173157 date "1999-01-01" @default.
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- W2022173157 title "Biomechanical evaluation of wrist motor tendons after fractures of the distal radius" @default.
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- W2022173157 doi "https://doi.org/10.1053/jhsu.1999.jhsu24a0121" @default.
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