[Composition and properties of calculus under specific and job-specific viewpoints]

Resulting from phase-analytical and chemical examinations there are characteristically habitual differences in the consistency of dental calculus. Very obvious are sex (gender) specific and job specific differences concerning the contents of heavy metals like lead, cadmium, copper, and zinc. Characteristics concerning the quantity, consistency and temper of dental calculus as well as the peal-homogeneous value (pH-value) of the saliva are obvious with miners working in salt-mines.