Objective:To investigate the expression level of TLR4,NOD2 and NLRP3in inflamed human dental pulp.Methods:Forty-seven human third molars were divided into three groups:healthy group,carious group,and pulpitis group.The expressions of TLR4,NOD2 and NLRP3in each group were investigated by immunohistochemistry and immunofluorescence staining.Results:In healthy group,the expressions of TLR4,NOD2,and NLRP3 were only observed in odontoblastic layer.The expression of TLR4,NOD2,and NLRP3 were higher in the caries a...