1. An oral care composition comprising an orally acceptable carrier and a precipitated silica abrasive comprising a silica compound having an average particle size of 5 μm to 20 μm and an Einlechner hardness of 4 to 11, and where the average particle size the specified precipitated abrasive based on silicon dioxide is reduced by 16-20% after application to a solid surface in the oral cavity. ! 2. The composition according to claim 1, where the silica-based abrasive has an average particle size of from 8 μm to 11 μm. ! 3. The composition according to claim 1 or 2, where forming on the basis of silicon dioxide has an oil absorption of 60 cm3 / 100 g to 120 cm3 / 100 g! 4. The composition according to claim 1, having a plaque removal efficiency of from 80 to 105.! 5. The composition according to claim 1, having an abrasion of radioactive dentin less than 150.! 6. The composition according to claim 1, having a PCR / RDA ratio of from 0.5 to 1.5. ! 7. The composition according to claim 1, where the abrasive based on precipitated silica is present in an amount of from 5 to 25 wt.% The composition. ! 8. The composition according to claim 1, where the abrasive based on silicon dioxide has a d10 from 2.5 μm to 2.9 μm. ! 9. The composition according to claim 1, where the average particle size of the specified abrasive based on precipitated silica is reduced by 16-20% after application to a solid surface in the oral cavity for 30 s to 5 minutes !10. The composition according to claim 1, comprising a fluoride ion source representing a fluoride salt selected from tin fluoride, sodium fluoride, potassium fluoride, sodium monofluorophosphate, sodium fluorosilicate, ammonium fluorosilicate, aminofluoride, ammonium fluoride aminofluoride, and combinations thereof. ! 11. The composition according to claim 1, comprising at least one surfactant selected from lauri1. Композиция для ухода за полостью рта, включающая орально приемлемый носитель и абразив на основе осажденного диоксида кре
