Mechanical medial proximal radial angle

The mechanical medial proximal radial angle is a landmark used to assess angular deformities of the radius and provide indications for their correction. It is determined, in the frontal plane, from a cranio-caudal radiograph of the radius/ulna.

The mechanical medial proximal radial angle is defined by the intersection of the mechanical radial axis and the proximal radial joint orientation line.

Mean values for the proximal medial mechanical angle of the radius of 80.9 +/- 2.8° and 80.1 +/- 2.8° were reported in Labrador Retrievers in recumbent and standing positions respectively.