Article Figures & Data
Figures
- Figure 1
The PEEK-on-ceramic device investigated in the current study. The PEEK endplates are coated with plasma-spray titanium and the core is ceramic (image courtesy of Simplify Medical, with permission).
- Figure 2
The derivation of the 2 treatment groups.
- Figure 3
The mean Neck Disability Index (NDI) scores were similar in the 2 groups prior to surgery and were significantly improved throughout follow-up in both groups (P < .001), with the total disc replacement (TDR) group having significantly lower scores at all follow-up points (*P < .025; propensity score [PS] adjusted). Subjects were censored at index-level secondary surgical interventions and intraoperative deviations.
- Figure 4
The mean visual analog scale (VAS) neck and arm pain scores were similar in the 2 groups prior to surgery and were significantly improved at all follow-up points (P < .001). The mean scores in the total disc replacement (TDR) group were statistically significantly less than ACDF values at the 3-, 6-, and 24-month follow-ups (P < .05, propensity score [PS] adjusted). Subjects were censored at index level secondary surgical interventions and intraoperative deviations.
- Figure 5
Flexion and extension radiographs from the 24-month follow-up shows the motion of the implant at the C6-7 level.
- Figure 6
There was little change in the severity of facet joint degeneration at the total disc replacement (TDR) at the 24-month follow-up compared with the preoperative MRIs (subjects censored at index level secondary surgical interventions and intraoperative deviations).
- Figure 7
Preoperative and 24-month postoperative MRI of the C6-7 level after total disc replacement (TDR) implantation showing no changes in the facet joints.
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