Porous Polyetheretherketone Interbody Cages for Anterior Cervical Discectomy and Fusion at 3 or More Levels: Clinical and Radiographic Outcomes

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Figure 1
Postoperative lateral radiograph in flexion (left) and extension (right) demonstrating measurments made to assess fusion at the addressed levels. Cervical Spine Research Society critera were utlized.
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Figure 2
Preoperative (left) and postoperative (right) lateral radiographs of an exemplary case indicating achievement of multilevel lordosis and restoration of disc space height without subsidence. Robust interbody fusion is demonstrated at the operated levels.

Table 1

Demographics of included patients (N = 33).

Table 2

Differences in radiographic outcomes between preoperative, postoperative, and final follow-up.

Measurement	Preoperative Mean (SD)	Postoperative Mean (SD)	Final Mean (SD)	Pre-Post P Value	Post-Final P Value	Pre-Final P Value
C2-C7 lordosis	1.09 (10.24)	10.42 (10.09)	9.55 (11.92)	<0.001	0.989	0.001
Sagittal vertical axis	23.51 (19.33)	28.08 (21.38)	28.74 (22.49)	0.002	0.859	0.008
Fusion segment lordosis	−1.74 (10.61)	8.70 (8.57)	8.69 (10.62)	<0.001	0.786	<0.001
T1 slope	24.53 (7.19)	29.98 (7.85)	29.13 (8.93)	0.053	0.951	0.022
Proximal adjacent segment lordosis	0.81 (4.83)	0.96 (6.76)	−1.35 (8.35)	0.836	0.108	0.097
Distal adjacent segment lordosis	1.77 (4.43)	1.27 (5.25)	3.43 (4.15)	0.626	0.263	0.237
Disc height	2.62 (1.62)	3.53 (2.47)	3.24 (2.32)	0.008	0.008	0.019

Table 3

Preoperative and postoperative patient-reported outcomes.