We present a novel framework for inferring 3D carpal bone kinematics and bone shapes from a single view fluoroscopic sequence. A hybrid statistical model representing both the kinematics and shape variation of the carpal bones is built, based on a number of 3D CT data sets obtained from different subjects at different poses. Given a fluoroscopic sequence, the wrist pose, carpal bone kinematics ...

Since Destot in 1905, the study of intracarpal injuries has interested many authors who were faced with wrist traumatisms [ 1– 7 ] . Therefore, the analysis of the sole traumas is not enough to understand carpal biomechanics. Studies have thus been led in different directions to solve injuries’ mechanism. Imaging studies dealt with the radiography of healthy subjects [ 8– 17 ] , with the in vit...

Two carpal rows with eight carpal bones form the wrist. From radial to ulnar, the proximal carpal row is formed by scaphoid, lunate, triquetrum, and pisiform, and the distal carpal row by trapezium, trapezoid, capitate, and hamate (Fig. 5.1). Stability is maintained by extrinsic (radiocarpal and ulnocarpal) and intrinsic (intercarpal) ligaments. Palmar and dorsal ligaments are differentiated an...

Understanding the kinematics of the carpus is essential to the understanding and treatment of wrist pathologies. However, accurate measurement of the kinematics of the carpal bones is difficult because they are small bones undergoing complex movements of small amplitudes. As a result, to date, there is no clear consensus on carpal kinematics. Moreover, most studies only investigate single rotat...

Computer assisted surgical interventions and research in joint kinematics rely heavily on the accurate registration of three-dimensional bone surface models reconstructed from various imaging technologies. Anomalous results were seen in a kinematic study of carpal bones using a principal axes alignment approach for the registration. The study was repeated using an iterative closest point algori...

The carpal tunnel in the wrist is formed by the interconnected carpal bones and the transverse carpal ligament (TCL). The tunnel contents include the median nerve, which is susceptible to entrapment in the space-limited tunnel leading to carpal tunnel syndrome (CTS). CTS patients have increased flattening of the median nerve which is alleviated after surgically transecting the TCL to increase c...

Ectrodactyly is a rare anomaly seen in the appendicular skeleton and characterized by cleft or split between bone soft tissue distal regions of extremities. may be associated with absence hypoplasia several carpal-metacarpal bones, phalanx duplication, metacarpal synostosis. In this case report, 2-years-old mixed breed male dog was presented withhold up left forelimb inspectional abnormality cl...

Trapezoid bone fracture is the least common fracture owing to the fact that it is strictly bounded to scaphoid, capitate and the base of the second metacarpal. Isolated fractures are rarely seen and usually related to the high energy trauma. It is conservatively treated without dislocation. Triquetrum fractures are the second least common fractures among carpal bones. The body fractures are usu...