Orthopedic Care and Consultation
The Scapholunate angle is formed by the intersection of the longitudinal axes of the scaphoid and lunate.
Scapholunate Angle
Its average value is 47°[Range 30° -70°].
Values >70° suggest a lesion of the scapholunate ligaments or the ligament complex between the scaphoid and the trapezium and trapezoid.
Angle< 30° suggest a palmar instability.
Capitolunate angle formed by the lines formed by lines in longitudnal axes of the capitate and lunate.
Capitolunate Angle
The average value is -5°.
The capitolunate angle is affected instability of the wrist in a way similar to radiolunate angle, But this measurement is less accurate than radiolunate angle because of difficulty in determining axis of capitate.
Radiolunate angle is the angle between the lateral longitudinal axis of the radius and the central axis of the lunate.
Its average value is -5°.
Radiolunate Angle
The angle becomes positive if the lunate is angled toward the dorsal side.
A change in this angle is a sign of carpal ligament damage with associated instability.
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