All of the tissue sections were proceeded with antibody against CD34 ( vascular endothelial cell marker) immunohistochemical staining, and the changes of BVR of rabbit peridontal tissue was observed under the light microscope ( LM). 对组织学标本进行CD34(血管内皮细胞标记物)免疫组化染色,光镜下观察兔牙周组织血管改建的变化。