If you have cavities that are not too bad yet then the Charcle Toothpaste can help to fill in the cavity without needing to see a dentist.
But if the cavity is too deep in your teeth then the Cavity can only be filled and fixed by a dentist installing a filling into your teeth.
So if your cavity has just started out then yes the Charcle Toothpaste will fill in the cavity but you have to use the Charcle Toothpaste before the dental cavity gets too far progressed.