患者男,35岁。因2牙龈反复肿痛不适来我院治疗。检查2近中邻面深龋,已露髓。探诊(一),叩诊 (士),牙龈无瘘管。X 线片见2根尖区牙槽骨吸收呈不规则透射区。2根尖部牙骨质呈不规则吸收,根尖孔开口扩大。予患牙开髓根管扩大时,疑有扩大器穿出根尖孔。用3%双氧水冲洗根管时,患者感觉2根尖区疼痛,随即出现右侧鼻唇沟、鼻底部肿胀,右鼻唇沟变浅,按压肿胀区有游走痛和明显捻发音。诊断:1.右鼻唇沟、鼻底部皮下气肿。2.2慢性根尖炎。处理:扩大根 Patient male, 35 years old. Repeated swelling and soreness due to 2 gums to our hospital for treatment. Check 2 near the mid-face deep caries, has exposed pulp. Exploration (a), percussion (disabilities), no fistula gums. X-ray see the two apical alveolar bone absorption irregular transmission zone. Two apical cementum showed irregular absorption and the apical foramen was enlarged. To the teeth open pulp root canal expansion, suspected expansion of the device piercing the apical hole. When the root canal was washed with 3% hydrogen peroxide, the patient felt pain in the two apical regions, a right nasolabial fold appeared, the bottom of the nose was swollen, the right nasolabial fissure became shallow, and the swollen area swollen and pronounced twisting sounds. Diagnosis: 1. Right nasolabial fold, subcutaneous emphysema at the bottom of the nose. 2.2 Chronic apical inflammation. Treatment: Expand the root