Mid-term comparative study between the glenoid and humerus lateralization designs for reverse total shoulder arthroplasty: which lateralization design is better?

Table 3 Comparison of radiographic outcomes between glenoid and humerus lateralized design of reverse shoulder arthroplasty

Characteristic	Glenoid lateralization RSA (BIO-RSA, n = 60)	Humeral lateralization RSA (ASCEND, n = 64)	p-value
Characteristic	Mean ± SD	Mean ± SD	p-value
PSNA^a	106.1 ± 22.1 (77.0–144.0)	108.1 ± 18.7 (79.8–169.8)	0.611
PGRD ^b	23.2 ± 9.6 (13.4–60.5)	24.0 ± 3.9 (17.8–36.0)	0.746
Scapular neck-inferior rim distance	2.9 ± 1.8 (-1.5–8.5)	2.5 ± 2.0 (-2.8–10.5)	0.771
AT distance ^c	42.7 ± 10.7 (25.8–64.0)	46.3 ± 9.8 (23.6–65.6)	0.069
GT distance^d	43.8 ± 9.9 (28.1–64.7)	51.6 ± 5.9 (36.8-.68.4)	0.000
Scapular notching			0.134
No notching	17	20
Grade 1	18	30
Grade 2	20	10
Grade 3	4	1
Grade 4	1	3
LSA^e	90.5 ± 9.2 (76.2–118.7)	89.2 ± 9.2 (69.1–123.2)	0.459
DSA^f	80.4 ± 8.9 (61.0–113.9)	76.9 ± 8.3 (60.9–100.1)	0.035

PSNA^a prosthesis-scapular neck angle, PGRD ^b peg-glenoid rim distance, AT^c distance acromion-tuberosity distance, GT^ddistance Glenoid-greater tuberosity distance, LSA^e lateralization shoulder angle, DSA^f Distalization shoulder angle

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