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The best way to avoid using an excessively abrasive toothpaste is to look for the American Dental Association's Seal of Acceptance on the package or tube. Numerous scientific studies that compare various toothpaste brands' abrasiveness are available, like this 2016 study published in BMC.
(but also in the literature known as radioactive dentin abrasion.) These are RDA values for common toothpaste: 0-70= low abrasive, 70-100= medium abrasive, 100-150= highly abrasive, 150-250= regarded as harmful limit. The Mohs hardness of dentin is 2.5, the Mohs hardness of baking soda (sodium bicarbonate) is 2.5. The RDA value of baking soda is 7.
Abrasiveness in toothpaste is a double-edged sword—it is essential for removing plaque and surface stains, but excessive abrasiveness can lead to enamel erosion and dentin hypersensitivity. The main purpose of toothpaste is to clean teeth and freshen breath, but the incorporation of abrasive components is what differentiates a simple paste ...
Here is a chart to help in understanding what the number means: Table: Low Abrasive: 0-70. Medium Abrasive: 70-100. Highly Abrasive: 100-150. Regarded as Harmful Limit: 150-250. This chart lists some common toothpastes that can be found in stores or online with their RDA value. This chart is courtesy of Kois Center located in Seattle, WA.
What is RDA Value in Toothpaste. Every toothpaste has an RDA value, which stands for Relative Dentin Abrasivity. RDA is a standardized scale to quantify and compare toothpaste abrasiveness. The lower a toothpaste’s RDA, the less abrasive it is. The American Dental Association recommends toothpastes with an RDA at or below 250.
Sensodyne Pronamel's toothpastes hold an low abrasive RDA value of 34, and the brand's daily protection paste is formulated to strengthen enamel while guarding against cavities. This version is also thoughtfully formulated without SLS. 2-Pack: $12 at Amazon 3-Pack: $15 at Amazon 2-Pack: $13 at Walmart.
Step 2: Rinse the toothpaste off the foil under running water. Step 3: See if any scratches remain on the surface of the foil. The foil on the left is the control foil and has not been tested with any toothpaste. The more abrasive toothpastes are on the right, where you can see the scratching/dulling of the tin foil.
Any number below 250 is considered to be a safe paste for daily use, meaning an RDA value of 100, 150, or even 250 would be considered equally safe for daily use. Surprisingly, abrasives (also called cleaning and polishing agents) are intentionally added to toothpaste to remove surface stains and break up bacterial colonies.
Toothpaste contains abrasive agents to clean and whiten the teeth. The level of abrasiveness of a paste, known as its relative dentin abrasivity (RDA), varies from product-to-product.
Any toothpaste with a higher RDA value than 7 which is equivalent to the hardness of dentin has the potential to cut dentin. RDA valuesforcommon toothpaste range from a rating of 0-70 which is considered low abrasive, 70-100 which is considered medium abrasive, 100-150 which is considered highly abrasive and 150-250 which is considered as ...