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Fig. 3 | Patient Safety in Surgery

Fig. 3

From: Empty polyetheretherketone (PEEK) cages in anterior cervical diskectomy and fusion (ACDF) show slow radiographic fusion that reduces clinical improvement: results from the prospective multicenter “PIERCE-PEEK” study

Fig. 3

Histograms of the number of patients at the four grades of radiographic fusion. The X-axis shows the four grades of radiographic fusion (as described in more detail in the Methods). The Y-axis is the number of patients. a) At the 6-month follow-up. b) At the 12-month follow-up. c) At the 18-month follow-up

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