Objective: Clinicial treatment of recurrent stomatologist by eating metronidazole and burn it with 20% of silver nitrate is to see its clinicial effect.

• 目的:本文用甲硝唑口服配合20%25硝酸银局部点灼复发性口腔溃疡进行临床治疗,从而评价其临床使用效果。