DENS-INVAGINATUS - A HISTOLOGICAL STUDY OF UNDEMINERALIZED MATERIAL

The aim of the present study was a microscopic analysis of dens invagi natus with a cutting grinding system that allowed to obtain thin groun d sections of undemineralized material. Cavities of about 1 mm were pr esent in the bulk of the inner enamel and these cavities were lined by aprismatic enamel, by a basophilic lamellar material and by cuboidal cells of probable epithelial origin. Enamel in a more external locatio n had an amorphous aprismatic appearance with the presence of basophil ic rounded or lamellar calcifications with the appearance of Liesegang 's rings. In one case the interradicular space was occupied by a large amount of a highly calcified bone tissue.