患者女,35岁。因11常痛于91年6月20日就诊。检查:11无龋,无缺损,色暗,叩痛(++),牙龈正常。牙不松动。X线片示:11尖周稀疏区,约1.5×1.5cm.开髓引流,次日复诊。叩痛(-),2％氯亚明液滴入根管去除腐髓,扩大根管,3％过氧化氢液、生理盐水交替冲洗。第一次冲洗无不适。再次扩大根管,3％过氧化氢液冲洗,患者觉11根部麻木,胀痛难忍。瞬时鼻唇沟消失,鼻翼部凸起,边界不清。触之肿胀部有捻发 Female patient, 35 years old. Due to 11 common pain in June 20, 91 visits. Check: 11 caries-free, no defect, dark color, percussion pain (++), normal gums. Tooth not loose. X-ray showed: 11 sparsely spiked area, about 1.5 × 1.5cm. Medullary drainage, referral the next day. Percussion pain (-), 2% chloramine drip into the root canal to remove the corneous pulp, expand the root canal, 3% hydrogen peroxide solution, alternating saline flushing. The first flush without discomfort. Re-expand the root canal, 3% hydrogen peroxide solution flush, the patient felt 11 root numbness, pain and unbearable. Instantaneous nasolabial fold disappeared, nasal wing raised, the border is unclear. Touching the swelling Department of twisting hair