１９９０年～１９９３年，采用空管药物一次法治疗急、慢性尖周炎１４３例，１７５牙，其中乳磨牙１２３个；恒磨牙５２个，年龄３岁～１３岁。１药物配方地塞米松０．７５ｍｇ；灭滴灵０．２；强力霉素０．２；三甲氧基苯氨啶０．２。将上述药物研成粉末；用时加木溜油适... From 1990 to 1993, 143 cases of acute and chronic periapical periodontitis were treated with empty tube drug once, 175 teeth, including 123 molars, and permanent molars 52, aged from 3 to 13 years old. 1 drug formulation dexamethasone 0.75mg; metronidazole 0.2; doxycycline 0.2; trimethoxypyridine 0.2. The above drug research into powder;