近年来复合树脂的不足之处被人们所认识和发现,常见问题有树脂充填后引起牙髓敏感、疼痛、甚至坏死[1]。其主要原因为窝洞预备后牙本质充分外露,在牙本质小管呈开放状态的情况下直接充填窝洞,可能会增加纳米渗漏的发生[2],进而加重牙齿的敏感症状,导致牙髓病变。本文就纳米渗漏的概念, In recent years, the inadequacies of the composite resin are recognized and discovered. The common problems are the pulp-sensitive, painful, and even necrotic pulp [1]. The main reason for the adequacy of posterior dentinoma in the preparation of cavities and the direct filling of cavities in the presence of dentinal tubules may increase the occurrence of nano-leakage [2], further aggravating the symptoms of the tooth and leading to pulp Lesions. In this paper, the concept of nano-leakage,