title: The relationship between dentin microhardness and tubule density.
mesh_terms: D000293:Adolescent; D000328:Adult; D003599:Cytoskeleton / Q000648:ultrastructure; D003804:Dentin / Q000502:physiology / Q000648:ultrastructure*; D005260:Female; D006244:Hardness; D006801:Humans; D008297:Male