Evaluation of Anterior Lumbar Interbody Fusion Performed Using a Stand-Alone, Integrated Fusion Cage

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Figure 1
The current design of the STALIF M-Ti device made of polyetheretherketone with texturized titanium surfaces interfacing with the vertebral bodies (courtesy Centinel Spine, LLC, with permission).
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Figure 2
The mean visual analog scales back and leg pain scores improved significantly after stand-alone anterior lumbar interbody fusion (P < 0.01).

Table 1

Description of the study population.

Characteristic	Measure
Age, y, mean (range)	47.8 (20–77)
Body mass index, kg/m², mean (range)	28.0 (20.4–40.6)
Gender, n (%)
Women	30 (51.7%)
Men	28 (48.3%)
Prior lumbar spine surgery, n (%)	25 (43.1%)
Level(s) implanted, n (%)
L4-L5	11 (19.0%)
L5-S1	44 (75.9%)
L4-L5 and L5-S1	2 (3.4%)
L3-L4 and L5-S1	1 (1.7%)

Table 2

Overview of re-operations in the series.

Reason for Re-operation	n (%)	Time from Index Surgery (mo)
Clear pseudarthrosis	3 (5.2%)	11, 19, and 27
Progressive cage subsidence	1 (1.7%)	2
Foraminal stenosis at index level	1 (1.7%)	3
Metal allergy reaction	2 (3.4%)	7 and 9
Adjacent segment degeneration	1 (1.7%)	17
Ongoing pain^{^a}	1 (1.7%)	4
Total	9 (15.5%)	Not applicable