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儿童真的有必要做窝沟封闭吗?有什么危害? - 知乎 3 Reem N , Azza E H , Najlaa A The Use of Pit and Fissure Sealants—A Literature Review [J] Dentistry Journal, 2017, 5 (4):34- 4 林挺,张梦驰,陈誉,曲静,谢健,卢友光 唾液污染和窝沟处理方式对封闭剂微渗漏影响的研究 [A];2018年中华口腔医学会第十八次口腔预防医学学术年会论文汇编 [C