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Crystallography of supragingival and subgingival human dental calculus
Author(s) -
SUNDBERG MARGARETA,
FRISKOPP JOHAN
Publication year - 1985
Publication title -
european journal of oral sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.802
H-Index - 93
eISSN - 1600-0722
pISSN - 0909-8836
DOI - 10.1111/j.1600-0722.1985.tb01305.x
Subject(s) - octacalcium phosphate , whitlockite , calculus (dental) , dentistry , materials science , chemistry , phosphate , medicine , metallurgy , calcium , organic chemistry
– Selected area electron diffraction of sections and individual crystal fragments of human dental calculus has demonstrated that octacalcium phosphate, hydroxyapatitc and whitlockite form the inorganic part of both supragingival and subgingival denial calculus. However, the major constituents in supragingival calculus arc platelet‐shaped crystals of octacalcium phosphate and needle‐shaped crystals of hydroxyapatite, while bulk crystals of whitlockite is the predominant component in subgingival calculus. The subgingival samples seemed to be better crystallized than the supragingival ones. The results obtained by the electron optical and X‐ray powder investigations are in good agreement.