The invention relates to oral and dental care agents and dental cleaning agents containing, (in relation to their weight), 0.005 to 0.1 % by weight of calcium salt(s) in the form of individual crystallites or particles comprising a plurality of said crystallites, an individual crystallite having a thickness ranging between 2 and 50 nm and a length ranging between 10 and 150 nm and the particles being rod and/or plate-shaped, preferably predominantly plate-shaped. The agents also contain between 2.0 and 25.0 % by weight of precipitation silicic acid(s) with a particle size d50 (laser diffraction according to ISO 133-20-1) 15 µm. Said oral and dental care agents and dental cleaning agents remineralise the teeth, making them less sensitive to external influences.
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