Table I.

Summary of results of the 13 different included studies (results of Statz et al were subdivided into 2 groups).

Sr. no	Author	Year	Study population	Mean age	Mean period of neglection (in months)	Type of dislocation	Type of intervention	No. of patients with preoperative glenoid bone defect	No. of patients with full thickness cuff	Postoperative average follow-up period (in months)	Gain in pain score/ maximum pain score	Gain in functional score	Gain in elevation	Gain in external rotation	No. of patients with postoperative instabilities	No. of postoperative complications	List of complications
1	Raiss et al14	2017	18	71	23	Anterior	RSA	4 Patient had severe bone loss	16 (10 massive tears; 6 large tears)	42	7.6/15	33.8	65.3	15.1	1	7	4 Glenoid failure (1 week, 1 Month, 9 month, 2 years); 1 Instability; 1 humerus fracture; 1 late infection
2	Statz et al19	2016	9	62	7	Anterior	RSA	8 Patient had <25%; 4 patient had 25-50%; 3 patient had 50%-75% bone loss	8	39.6	3/5	NR	63	57	0	4	1 Shaft fracture; 1 Heterotrophic ossification
3	Van Tongel et al21	2016	6	73	4.5	Anterior	RSA	1 patient had 90%; 1 patient had 25%; 2 had less than <12% bone loss	3 (1 massive tear, 2 large tear)	39	NR	37	NR	NR	0	0	None
4	Werner et al22	2014	21	71	6	Anterior	RSA	Average 45% bone loss	6 (2 massive cuff tear; 4 massive subscapularis tear)	58.8	11/15	51.5	93	6	0	2	2 Baseplate loosening (12 month and 15 month)
5	Kurowicki et al8	2016	24	76	NR	Anterior	RSA	3 Patient had > 50% bone loss	23	25.5	6/10	25	40	40	2	6	4 Acromion type 3 fracture; 2 Instabilities
6	Statz et al19	2016	10	60	9	Anterior	ASA	NR	3	144	2/5	NR	24	11	6	8	6 Instabilities; 2 glenoid erosion
7	Flatow et al3	1993	10	65.1	29.7	Anterior	ASA	3 Had more than 50% bone loss	2 large tear	43.1	NR	NR	46	58	1	1	1 Anterior subluxation
8	Raiss et al13	2009	10	67	NR	Anterior	ASA	2 Patients had severe bone loss	6 (3 supraspinatus tear and 3 subscapularis tear)	23.8	7.6/15	42.4	81	24	1	2	1 Re-dislocation with rerupture of the subscapularis tendon; 1 glenoid abrasion
9	Matsoukis et al10	2006	11	69.3	24	Anterior	ASA	4 Patients had >30% bone loss	5 (3 isolated supraspinatus; 1 isolated subscapularis tear; 1 massive tear)	47.7	6.2/15	24.9	41.4	12.3	4	7	4 Instability; 1 Bone graft migration; 2 glenoid loosening
10	Li et al9	2016	5	71	5	Anterior	ASA	Average 25% bone loss	None	31.6	NR	NR	63	3	4	4	4 Instabilities
11	Pritchett et al12	1987	4	60	11	Anterior	ASA	NR	NR	30	NR	20	NR	NR	0	1	1 Axillary nerve palsy
12	Wooten et al24	2014	32	54	21.7	Posterior	ASA	Average >45% bone loss	3 small to medium; 1 large tear; 1 irreparable massive tear	98.4	1/5	NR	8	65	5	12	1 Aseptic loosening; 1 Nonunion; 2 infections; 5 instabilities; 1 median neuropathy; 2 severe pain
13	Gavriilidis et al5	2010	12	49.8	14.5	Posterior	ASA	Average >45% bone loss	3	37.4	NR	NR	40.8	43.4	0	4	1 Severe migration of head; 2 mild migration; 1 revision of glenoid
14	Cheng et al1	1997	7	58	23	Posterior	ASA	NR	NR	24	4.2/10	35.5	32.3	15.4	1	1	1 Instability

NR, not reported; RSA, reverse shoulder arthroplasty; ASA, anatomic shoulder arthroplasty.