Table 2.

Differential diagnosis table for polyethylene liner dissociation versus standard dislocation.

Entity	X-ray	Computed Tomography
Reverse shoulder arthroplasty with polyethylene liner dissociation	Subluxation of the components with less than 100% displacement	Though appearing located on x-ray, the prosthesis will be subluxated less than 100% on computed tomography
Reverse shoulder arthroplasty with standard dislocation	Complete dislocation of components	Complete dislocation of components with less than 100% displacement