OBJECTIVE: To explore the preparation of epidermal growth factor, dexamethasone and ornidazole-contained chitosan composite membrane, and to test its effect on dental ulcer repair.

• 目的：制备表皮细胞生长因子复合地塞米松及含奥硝唑的壳聚糖复合药膜，观察其对口腔溃疡愈合过程的影响。