Objective To establish the rat model of low back pain due to intervertebral disc injury and observe the change of CD34 in intervertebral discs.Methods Ninety-six male SD rats were randomly divided into control group(sham operation group),first operation group and second operation group.Expression of CD34 in injured L6-7 intervertebral discs was detected with immunohistochemical methods at different time points.Results The rat model of low back pain due to intervertebral disc injury was successfully establis...