Fig. 5From: A novel surgical technique in transforaminal lumbar interbody fusion by the bone graft delivery device: evaluation of therapeutic effect in patients with minimally invasive spine surgeryThe percentage distribution of grade fusion at each follow-up time points. The percentage distribution of grade I, II, and III fusion prior to and at each follow-up time points in cases with the traditional method or novel device. Grade I, II, and III indicates complete fusion, partially fusion, and no fusion of the casesBack to article page