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Effect of Zn and Mg on the formation of whitlockite in human subgingival calculus
Author(s) -
KNUUTTILA MATTI,
LAPPALAINEN ROLF,
KONTTURINÄRHI VUOKKO
Publication year - 1980
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.1600-0722.1980.tb01261.x
Subject(s) - whitlockite , chemistry , nuclear chemistry , atomic absorption spectroscopy , radiochemistry , mineralogy , apatite , physics , quantum mechanics
– X‐ray diffraction analyses were carried out from pooled samples of old subgingival calculus. Also the concentrations of Ca, Mg, Zn, Sr, Pb, Fe and Cu from these samples were determined by means of atomic absorption spectrophotometry. The comparison of the samples containing almost the same Zn concentration and two different concentrations of Mg (9 mg/g and 16 mg/g) showed an increase of 2. 0. 10 and 220 whitlockite reflections with an increasing Mg concentration. The increase of Mg concentration shifted whitlockite reflections suggesting a contraction of a‐axis. The increase of Zn concentration showed an increase of 2. 0. 10 and 220 reflections indicating the fitness of Zn into the laitice of whitlockite. No changes of a‐axis were detectable. When comparing all diffractograms and the results obtained from chemical analyses, the presence of Zn‐Mg‐whitlockite proved evident.