Hi as u asked, putting calcium carbonate on tooth surface may not be as effective as calcium carbonate nano particles preperations.. as enamel decay is caused by acidic metabolites of bacteria the alkali nature of calcium carbonate will prevent this and thus reducing enamel degradation,apart from this calcium carbonate is already being used in preperation of toothpastes..on the other hand amorphous calcium phosphate does attract fluoride ions thus a fluoride rinse or a toothpaste with amorphous calcium phosphate and flouride wil definately help in resisting cavities and dental decay

U r 26 yr old n ur all the teeth ll b erupted n complete post eruption maturation ll b over by now... N ur toothpastes already contain enough calcium carbonate required to clean ur teeth... N using Fl mouthwash s always good... U can continue that to prevent decay...

Hi, Good to learn that you are using fluoride mouthwash on a regular basis. While fluoride can be locally absorbed, the calcium carbonate is not absorbed just by putting it in the mouth. It has to be injested into the system. So, you can take Calcium tablets instead. Hope this solves your doubts.If there is any other query, do get back.