PURPOSE: To study the effect of lanthanum chloride at certain concentrations on the proliferation of human gingival fibroblast.
目的：检测不同浓度氯化镧对人牙龈成纤维细胞的影响。
Objective:To observe the effects of nicotine and smokeless tobacco extract (ST)on growth and attachment of human gingival fibroblast.
目的：体外观察尼古丁和烟草浸提液（ST）对人牙龈成纤维细胞的生长和贴附影响。
Objective:To observe the effects of nicotine and smokeless tobacco extract (ST)on growth and attachment of human gingival fibroblast.
目的：体外观察尼古丁和烟草浸提液（ST）对人牙龈成纤维细胞的生长和贴附影响。
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