Can posterior stand-alone expandable cages safely restore lumbar lordosis? A minimum 5-year follow-up study

Table 4 Comparison of furoin rate and implant failure rate in each group

Implant failure	Stand-alone expandable cage fusion (n = 141 levels)	Screw-assisted fusion (n = 165 levels)	P value
Fusion rate, no. (%)	123(87.23)	151(91.51)	.22^a
Subsidence, no. (%)	23 (16.31)	8 (4.85)	.0018^a*
Pseudoarthrosis, no. (%)	13 (9.92)	4 (2.42)	.02^a*
Proximal junctional kyphosis, no. (%, per cases)	7 (10.1)	18 (22.5)	.03^a*
Cage breakage, no. (%)	8 (5.67)	0 (0)	.01^a*
Cage retropulsion, no. (%)	5 (3.55)	0 (0)	.01^a*
Screw malposition, no. (%)	0 (0)	6 (3.63)	.02^a*

ISSN: 1749-799X