Fig. 1From: Effects of annulus defects and implantation of poly(lactic-co-glycolic acid) (PLGA)/fibrin gel scaffolds on nerves ingrowth in a rabbit model of annular injury disc degenerationSurgical technique. Exposure of three consecutive intervertebral discs (L3/4, L4/5, and L5/6). Empty defects (1.8-mm diameter; 4-mm depth) were created using a mini-trephine in the anterolateral annulus; annulus punctures were performed using a 16G needle at a depth of 5Â mmBack to article page