A case of calculus in the right submandibular region

morphological and physico-chemical study

Abstract

A case of calculus in d 54-year-old female who complained of radiopacity in the right submandibular region was reported.
Using X-ray diffraction and electron microprobe x-ray analyzer, its components were analyzed and the ultrastructure of the cracked surface of calculus was observed with scanning electronmicroscope.
The results were as follows:
1) Main component was hydroxyl apatite.
2) Ca and P showed homogenous distribution.
3) In a SEM findings, it was found that calculus was covered with a thick fibrous membrane and, had not a laminated structure such as a salivary stone.