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现已证实，慢性根尖周炎中以厌氧菌感染占优势，甲硝唑是目前公认的抗厌氧菌的首选药物。本文用０．２５％的甲硝唑注射液加ＦＣ治疗慢性根尖周炎患牙１８６个。其疗效比单用ＦＣ好，这一临床治疗方法值得推广。
It has been confirmed that the chronic periapical anaerobic infections prevail, metronidazole is currently recognized as the preferred anti-anaerobic drugs. In this paper, 0.25% metronidazole injection plus FC treatment of chronic apical periodontal 186 teeth. The effect is better than FC alone, this clinical treatment is worth promoting.