Table 1.

Spectrum of scapholunate instability by radiograph

Group	Description
Predynamic instability	Radiographs do not reveal injury but physical exam is positive for pain with wrist use
Dynamic instability	Radiographs will reveal the injury under stressed or dynamic loading
Static scapholunate dissociation	Plain radiographs will show scaphoid displacement without stressed or dynamic loading
Scapholunate advanced collapse	Radiographs show static scapholunate dissociation with arthritic changes at the wrist

Note: Data from Watson et al.³¹