Microstructural and microradiographic qualities of lemon shark enameloid.

摘要: Abstract Ground longitudinal and cross-sections from five fully mature lemon shark teeth were examined by transmitted polarized light microscopy, microradiography, scanning electron microscopy X-ray diffraction techniques. The enameloid contained radial fibres and/or crystal bundles, bundles processes which extended the dentine. oriented parallel with outer surface of while group ran perpendicular to these surface. exhibited a negatively birefringent quality respect plane crystallites whose “c” axes roughly surface, deviating somewhat parallelism as dentine was approached. layer shark's more highly mineralized than underlying progressive drop in mineralization reached. “fibres” seen comprised number finer, submicroscopic units.