Radiologic measurement of the scapholunate joint: Implications of biologic variation in scapholunate joint morphology

The significance of conventional radiographic parameters in the diagnosis of scapholunate ligament lesions

“…Contrary to the carpal angles, the correct normal ranges for the SL distance are subject to discussion while suggestions for normal values range from 2 to 5 mm [6,7]. Controversy also exists about the correct measuring technique [22,[24][25][26]. In a similar approach to that in this study, Pliefke et al also found the optimal threshold to be 2.5 mm [11].…”

Fluoroscopic Diagnosis of Scapholunate Interosseous Ligament Injuries in Distal Radius Fractures

“…Third, the two cortices of the scapholunate joint are not always parallel. Fifteen percent of normal adult wrists show an inverted Y-shaped scapholunate joint [26]. When the two cortices are not parallel, the magnitude of the scapholunate gap varies depending on which part of the scapholunate joint was measured, proximal or distal.…”

“…portion of the scapholunate joint showed the most consistent and narrowest scapholunate gap and the least measurement variance, the gap was measured at the midportion of the flat surface of the ulnar cortex of the scaphoid [26]. A complex method of measurement, which included drawing a line bisecting the scapholunate joint and a scapholunate gap line vertical to it, was devised to make the measurement more consistent regardless of the shape of the joint.…”

Accuracy of simple plain radiographic signs and measures to diagnose acute scapholunate ligament injuries of the wrist

“…at the midpoint of the carpal arcs) [17,18]. Carpal angles were measured in true lateral view using the tangential method for the SL angle and axial method for RL angle as proposed by Larsen and colleagues [4,19].…”