其它症状包括发烧、瘘管和眼睛受到刺激。

Other symptoms include fever, and sinus and eye irritation.

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瘘管可能常常无症状了很长一段时间。

The fistula may often be asymptomatic for a long time.

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结果根尖有阴影的患牙有效率达80 。3% ，有瘘管形成的患牙有效率达10 0 % ，有临床症状的患牙有效率达91。

Result The effective rates were 80.3% in teeth with periapical lesions, 100% in teeth with fistula and 91.8% in patients with clinical symptoms respectively.

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