A scanning electron microscopic observation of detached dental calculus on cementum surface.

Scanning electron microscopy of dental calculi.

“…was not perfect but seemed to be similar to monoclinic brushite, CaHPO4.2H20, rather than hexagonal hydroxyapatite, Ca10(PO4)6(OH)2, which usually have the form of hexagonal plates or pi isms [4,5,6,7], although the X-ray diffraction method failed to detect it because of the scarcity of the material.…”