Radial Inclination of Distal Radius Frx



- Discussion:
    - mean radial inclination was 24 degrees (range, 19 to 29 degrees);
    - measured on PA view, & describes relative angle of distal radial articular surface to a line perpendicular to long axis of the radius;
    - this angle normally measures between 16 and 28 deg, av = 20;
    - measured on AP & is represented by < formed by line drawn from tip of radial styloid to ulnar corner of articular surface of distal end of radius & line drawn perpendicular to longitudinal axis of the radius;
    - avgerage radial inclination is 22 to 23 deg (some say 16 to 28 deg);
    - loss of radial inclination will increase load across the lunate;

- Acceptable Reduction:
    - radial tilt greater than 10-15 deg;
    - loss of radial inclination will be more likely to result in pain when there is concomitant loss of dorsal inclination;

- Restoration of Radial Inclination:
    - radial-ulnar translation of hand on forearm is may be used in realigning distal radial fragment on the radial shaft;
    - w/ ulnar translation, the 1st and 2nd extensor compartment tendons and their associated retinaculum create a radial soft tissue hinge;
    - this allows ligamentotaxis w/ ulnar translation to restore the ulnar tilt



Original Text by Clifford R. Wheeless, III, MD.

Last updated by Data Trace Staff on Tuesday, August 7, 2012 2:21 pm