Table I.

Grouping of selected complications used to classify indications and outcomes.

Complication	Description
Component loosening	Glenoid or humeral component dissociation, screw failure, malposition, migration, or material disassembly following arthroplasty.
Instability	Recurrent dislocations due to a defect in the prosthesis
Rotator cuff failure	Insufficiency or tear in rotator cuff muscles
Glenoid failure	Glenoid disease following hemiarthroplasty (arthritis/erosion/arthrosis) or glenoid component failure (polyethylene wear or broken hardware) following anatomical TSA
Baseplate failure	Polyethylene wear or broken hardware in baseplate of glenoid component following reverse TSA
Fracture sequalae	Nonunion, malunion, or failure following fracture fixation
Radiological complications*	Component or bone lucency, subsidence, scapular notching, or radiological loosening.
Wound problems	Wound infection or impaired healing post-surgery.

^*Includes radiological inconsistencies reported as a complication and requiring reintervention as a result. Radiological outcomes were not studied in this systematic review.

TSA, total shoulder arthroplasty.