This scapholunate dissociation
is the first stage of Mayfield et al.'s classification.
INTRODUCTION: The Scapholunate dissociation is an injury to ligaments in the wrist that can lead to loosening of carpal bones.
Scapholunate advanced collapse (SLAC) is a type of arthritis related to scapholunate dissociation. Wrick JD et al performed proximal row carpectomy for SLAC and were successful in preserving joint motion1.
Our case of scapholunate dissociation was an isolated entity.
On PA view it was differentiated from scapholunate dissociation
where there was widening of space between lunate and scaphoid.
Also, static scapholunate dissociation with signs of mild arthritis was obvious (Figure 2a & 2b).
Also, a combined scaphoid fracture and scapholunate dissociation may be seen in these devastating injuries (6).
Tang and associates (36) reported on 20 of 424 consecutive patients with fractures of the distal radius who presented with evidence of scapholunate dissociation on radiographs and traction-view fluoroscopy.
Can cast immobilization successfully treat scapholunate dissociation associated with distal radius fractures?
Watson and coworkers found that 95% of all degenerative changes are centered around the scaphoid, mostly due to late sequelae of scapholunate dissociation or chronic scaphoid nonunion, termed SLAC (scapholunate advanced collapse) and SNAC (scaphoid nonunion advanced collapse) wrist.
Untreated scapholunate dissociation with a hyperflexed position of the scaphoid gives rise to cartilage degeneration between the joint surfaces of the dorsal radius and the scaphoid, equivalent to a stage II SNAC wrist.
(23.) Vance RH, Gelberman RH, Braun RM: Chronic bilateral scapholunate dissociation without symptoms.