Table 2. Summary of Reported Complications of Reverse Total Shoulder Arthroplasty for Rheumatoid Arthritis.

Study	Scapular notching (G1/G2/G3/G4)	Infection	Instability	Glenoid loosening	Scapular spine fracture	Acromion fracture	Coracoid fracture	Glenoid fracture	Periprosthetic fracture	Neurologic complication	Other complications	Complication rate (%)	Revision rate (%)
Hattrup et al.10)	37% (5/2/0/0)	0	1	0	2	1	0	0	0	Ulnar neuropathy	0	26	0
Young et al.2)	56% (4/4/1/1)	0	0	0	1	1	1	0	0	Transient axillary nerve palsy	GT fracture	28	0
Ekelund and Nyberg17)	52% (23) (1/7/4/0)	1	1 (PE wear)	0	0	0	0	1	0	0	Central screw breakage	15	11
Holcomb et al.11)	0%	2	0	1	1	0	0	1	1	0	0	29	14
John et al.12)	24% (G1 or G2)	0	0	0	0	0	0	0	0	0	0	0	0
Woodruff et al.16)	NR	0	0	2	0	0	0	1	0	0	0	23	0
Rittmeister and Kerschbaumer13)	NR	1	0	2	0	3 (fixation failure of TAA)	0	0	0	0	0	50	38

G: grade, GT: greater tuberosity, PE: polyethylene, NR: not reported, TTA: transacromial approach.