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Base anatomique d'un nouveau concept de stabilité du carpe

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Summary

Based on anatomical and biomechanical evidence, we conclude that the stability of the carpus relies on the lunate bone which is the centre of the longitudinal as well as the transverse functional axis. The lunate is firmly stabilised proximally to the radius and the radio-ulnar ligament complex by the proximal V-ligament, and so becomes a weight bearing structure. It is anchored by strong ligaments to the scaphoid on one side and the triquetrum on the other, thus forming a 3-bone intercalary system, which is in turn guided by the palmar distal V-ligament and the dorsal radio-triquetral ligament.

Résumé

Le concept de stabilité du carpe repose sur l'anatomie et la biomécanique. Celles-ci nous permettent de constater que le lunatum est le centre de deux axes fonctionnels: l'un longitudinal, mécanique, l'autre transverse, dynamique. Le lunatum est fermement stabilisé au radius et au complexe ligamentaire cubital par le V proximal: il devient ainsi un élément porteur; il est de plus fermement uni aux os voisins, le scaphoideum et le triquetrum, avec lesquels il forme une unité fonctionnelle intercalaire différenciée. Le guidage de cette unité est assuré par le V distal et le ligament radio-triquetrum dorsal.

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Sennwald, G., Segmüller, G. Base anatomique d'un nouveau concept de stabilité du carpe. International Orthopaedics 10, 25–30 (1986). https://doi.org/10.1007/BF00266269

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