方法：分别通过溶血试验、口腔黏膜刺激试验、细胞毒性试验(MTT法)和急性全身毒性试验，初步评价纯钛表面聚吡咯涂层的生物安全性。

METHODS: the biological safety was evaluated through the experiments including hemolysis test, short-term systemic toxicity test, oral mucous membrane irritation test and cytotoxicity test (MTT test).

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