Microstructure of the Distal Radius and Its Relevance to Distal Radius Fractures

Journal of Wrist Surgery
Gregory Ian BainRuth Williams

Abstract

Background  There is a paucity of information on the microstructure of the distal radius, and how this relates to its morphology and function. Purpose  This study aims to assess the microanatomical structure of the distal radius, and relate this to its morphology, function, and modes of failure. Methods  Six dry adult skeletal distal radii were examined with microcomputed tomography scan and analyzed with specialist computer software. From 3D and 2D images, the subchondral, cortical, and medullary trabecular were assessed and interpreted based on the overall morphology of the radius. Results  The expanded distal radial metaphysis provides a wide articular surface for distributing the articular load. The extrinsic wrist ligaments are positioned around the articular perimeter, except on the dorsal radial corner. The subchondral bone plate is a 2 mm multilaminar lattice structure, which is thicker below the areas of the maximal articular load. There are spherical voids distally, which become ovoid proximally, which assist in absorbing articular impact. It does not have Haversian canals. From the volar aspect of the lunate facet, there are thick trabecular columns that insert into the volar cortex of the radius at the metaphyseal-d...Continue Reading

Citations

Mar 21, 2020·Archives of Orthopaedic and Trauma Surgery·W HintringerH Krimmer
Jul 15, 2021·Journal of Avian Medicine and Surgery·Tiziana BertuccelliFilippo Spadola

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