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目的:运用家系为基础的相关性检验(family based associated test,FBAT)方法,分析侵袭性牙周炎(aggressive periodontitis,AgP)与维生素D受体基因多态性(TaqⅠ和FokⅠ)的关联。方法:纳入93个核心家系的93个先证者和155个一级亲属,先证者和亲属VDR多态性位点的基因分型联合应用聚合酶链式反应(polymerase chain reaction,PCR)和限制性片段长度多态性(restriction fragment length polymo