Objective: To observe the expression of vascular endothelial growth factor(VEGF) in callus during mandibular defect healing and explore the influence of VEGF on defect healing.

• 目的:观察下颌骨骨缺损愈合过程中骨痂组织内血管内皮细胞生长因子(VEGF)的表达,进一步探讨VEGF对骨缺损愈合的影响。