A Follow-up Study to Evaluate the Efficacy and Safety of Novomax in Posterior Lumbar Interbody Fusion

During one‐level PLIF, bioactive glass‐ceramic intervertebral spacer (Novomax) and titanium cage were inserted in the experimental group and control group, respectively. Bone fusion by simple radiography had angular deformity of less than 3 degrees and a potential of less than 3 mm in flexion extension radiographs, and thin‐section CT (<2 mm) was used to determine the combination between the vertebral endplate and the autogenous bone or bioactive glass‐ceramic intervertebral spacer (Novomax) in the cage without any gaps or the part connected to bony trabecula as fusion, and both groups will be compared.