Fig. 2

Histologic analysis after application of various toothpastes in the dentin hypersensitivity model with canine teeth. The toothpastes were applied using the Bass method to all groups of teeth, once daily for 6 weeks. In groups 1, 3, and 4, no histologic changes were observed in the dentin–pulp interface. In contrast, group 2 showed newly formed tertiary dentin. Boxed areas are shown at higher magnification. The asterisk indicates the defect area; D represents dentin; P represents pulp; TD represents newly formed tertiary dentin