How abrasive is Akamai Mineral Toothpowder -- and effective at removing stains? Also, what is its RDA and CEI?
Akamai Mineral Toothpowder is ideally formulated to remove stains while protecting and preserving tooth enamel.
Our Mineral Toothpowder has an RDA of 81 a PCR (Pellicle Cleaning Ratio) of 182 and a CEI (Cleaning Efficiency Index) of 2.65 - rated as "extremely effective" in cleaning stains by an independent 3rd party lab*. A high Cleaning Efficiency Index indicates high stain removal ability (high PCR) combined with low abrasivity (low RDA).
The Relative Dentin Abrasivity (RDA) is a scale developed by the American Dental Association, that uses a standard measurement to assess toothpaste abrasiveness. The higher the RDA score, the more abrasive than toothpaste. It ranges from 0 to 250.
The Cleaning Efficiency Index is seen by many to be a superior test when looking at abrasiveness. The Cleaning Efficiency Index (CEI), is calculated according to the equation: CEI = (RDA + PCR – 50) ÷ RDA. The CEI emphasizes the importance of good stain removal properties and low dentin abrasivity.
*Our Mineral Toothpowder has been third-party tested by world-renowned Therametric Technologies, Inc.