Fig. 7From: Minimal invasive annulotomy for induction of disc degeneration and implantation of poly (lactic-co-glycolic acid) (PLGA) plugs for annular repair in a rabbit modelRepresentative lateral radiographs before surgery (a) and 6 months after surgery (b). Three experimental levels showed obvious and various degrees of disc space narrowing after surgery. Osteophyte formation (white asterisk) was seen at the margin of the vertebral bodies. The arrows indicate the operated discBack to article page