1.临床资科:用黄连粉根充共11例,其中男9例,女性2例,年龄20～55岁。2.根充前对牙齿的要求:①根充前选择前牙,根管通畅,无弯根,根尖无炎症,叩痛(一),拍X片骨质无破坏,牙周膜无改变,无牙周袋,不松动,牙齿正常。②经局麻拔髓后用扩大针1～5号扩 1 clinical literatures: with Coptis root filling a total of 11 cases, including 9 males and 2 females, aged 20 to 55 years. 2. Roots before the requirements of the tooth: ① Roots before the choice of anterior teeth, root canal patency, no bending root, apical inflammation-free, percussion pain (a), X-ray film without damage, no change in periodontal ligament , No periodontal pocket, not loose, normal teeth. ② by the local anesthesia after the expansion of the needle 1 ~ 5 expansion needle expansion