Conclusion: It is suggested that tetracycline-HCI is a local remedy for diseased root canal, dental pulp and apical periodontitis etc.

• 动物实验各期置入体及其周围组织中均可见四环素荧光染色像。结论:盐酸四环素可作为感染根管、牙髓、根尖周等疾病的局部治疗用药。