This is my first question on the forum. I am currently interested in solid toothpastes (dental tablets), but would like to regulate the level of abrasiveness.
This is my starting formula:
51.00% Calcium carbonate
05.00% Stevia powder
05.00% Sodium cocoyl isethionate
01.50% Tincture of propolis
01.00% Peppermint essential oil
01.00% Ginger essential oil
10.00% Witch Hazel Hydrolate
I have thought about the following modifications:
a) replace part of the abrasives with non-colloidal microcrystalline cellulose
b) add 0.50% xanthan gum, so that it forms a paste on contact with saliva and creates a stable suspension of abrasives during use.
My main doubt is that microcrystalline cellulose is also used as an abrasive, but I can't find data about its degree of abrasiveness and if it would be too strong. I found a patent application for toothpastes with reduced abrasiveness where microcrystalline cellulose, colloidal and non-colloidal, are mentioned for this purpose, but the authors refer to pastes and, if I have understood correctly, they use mainly colloidal MCC.
Does anyone have any ideas about what approximate percentage I should substitute to get:
a) a toothpaste for regular use (given that in toothpastes the percentage of abrasives can be around 30%, I had thought 40-45% of non-colloidal MCC)
b) a toothpaste for sensitive teeth (I had thought 60% MCC)
or some other way to regulate the abrasiveness of the final product.
(I don't have access to colloidal MCC.)
Thank you very much for your attention and help.