Methods: The expression and change of VEGF in different periods(1,2,3,4 weeks) of mandibular defect healing of rat was investigated by immunohistochemistry method.

• 方法:采用免疫组织化学方法检测大鼠下颌骨骨缺损术后1、2、3、4周骨痂组织中VEGF的表达和变化。