Fig. 2From: Comparative effectiveness of two different interbody fusion methods for transforaminal lumbar interbody fusion: cage versus morselized impacted bone graftsa Lateral view of a patient who underwent TLIF with a PEEK cage at the first postoperative week. b CT scan images at the twenty-fourth postoperative month demonstrating a stable Grade 5 bony fusion at the L4/5 level, as described by the anterior fusion criteria defined by BrantiganBack to article page