Fig. 3From: Investigation on the Gradient Nanomechanical Behavior of Dental Fluorosis EnamelNanomechanical properties of the enamel layers of the normal tooth, mild dental fluorosis, and severe dental fluorosis. a Nanohardness. b Elastic modulus. Identical symbols denote no significant difference in nanohardnesses and elastic moduli among the corresponding layers of the normal tooth enamel, mild dental fluorosis enamel, and severe dental fluorosis enamelBack to article page