一、颌面颈部的化脓性皮肤炎与牙源性外瘘在齿科领域疾病中容易被误诊的疾病之一是牙源性外瘘（图１）。牙源性外瘘是起因于牙源性化脓性炎症的排脓路开口到了颜面或颈部皮肤上，根据部位不同分别称为颊瘘、耳瘘、内眦瘘、外眦瘘等。图１齿瘘发生模式图牙源性外瘘容易导致... First, the maxillofacial and neck purulent dermatitis and odontogenic fistula in the field of dental diseases easily misdiagnosed one of the diseases is the odontogenic fistula (Figure 1). Odontogenic fistula is caused by odontogenic suppurative inflammation of the opening to the face or neck skin, according to the different parts were called cheek fistula, ear fistula, fistula, fistula and so on. Figure 1 fistula occurence pattern tooth-derived fistula easily lead to ...