由感染、化学或物理刺激等因素所致的根尖周病,临床上经几次常规治疗,绝大多数都能治愈,但也常遇到一些较难治疗的特殊情况所致者。现就这方面的病因进行初步探讨。 1 临床资料 1982年2月～1990年7月我科门诊共收集特殊情况的根尖周病40例共42牙,其中男性24例24牙,大性16例18牙;年龄8～64岁,20～50岁占70％。 特殊情况的根尖周病包括:①临床检查结合x线片证实患牙牙根有特殊改变或异常,且无法治疗需拔除者。②患牙从开髓拔髓起,4次以上复 Periapical disease caused by infection, chemical or physical stimulation and other factors, the clinical treatment by several times, the vast majority can be cured, but also often encountered some more difficult to treat due to special circumstances. Now on the etiology of this area for a preliminary discussion. 1 Clinical data February 1982 ~ July 1990 a total of 40 cases of periapical disease were collected in our clinic a total of 42 cases, including 24 males 24 teeth, large 16 cases 18 teeth; aged 8 to 64 years old, 20 to 50 years old accounted for 70%. Periapical disease in special cases include: ① clinical examination combined with x-ray confirmed tooth root special changes or abnormalities, and can not be treated to be removed. ② teeth from the pulp from the pulp, more than 4 times complex