Mar 14

Toothpastes That Eat Teeth:

The RDA value ( radioactive dentin abrasion or relative dentin abrasivity) is figured for every FDA approved toothpaste. However, this is rarely mentioned in the marketing efforts of the manufacturers, since a few of them are quite abrasive.

The ADA (American Dental Association) has adopted a standardized test. Basically, extracted human teeth are irradiated with mild neutrons, mounted and stripped of enamel. The teeth are then inserted into a brushing machine and brushed at a constant pressure and stroke speed. The rinsewater is then measured for its radioactivity and recorded. Thus after a few calculations, a score or index is given to the toothpaste. Any value over 100 is considered to be abrasive. The ADA recommended limit is 250, whereas the FDA limit is 200. Other factors that are taken into consideration are the size, quantity, and surface structure of the abrasive itself.

The RDA table:
0-70 = low abrasive
70-100 = medium abrasive
100-150 = highly abrasive
150-250 = regarded as harmful limit

RDA Value
Toothpastes
Straight Baking Soda 7
Arm & Hammer Tooth Powder 8
Arm & Hammer Dental Care 35
Oxyfresh 45
Tom’s of Maine Sensitive 49
Arm & Hammer Peroxicare 49
Rembrandt Original 53
CloSYS 53
Tom’s of Maine Children’s 57
Colgate Regular 68
Colgate Total 70
Sensodyne 79
Aim 80
Tooth and Gum Care 83
Colgate Sensitive Max Strength 83
Aquafresh Sensitive 91
Tom’s of Maine Regular 93
Crest Regular 95
Mentadent 103
Sensodyne Extra Whitening 104
Colgate Platinum 106
Crest Sensitivity 107
Colgate Herbal 110
Aquafresh Whitening 113
Arm & Hammer Tarter Control 117
Arm & Hammer Advance White Gel 117
Close-up with Baking Soda 120
Colgate Whitening 124
Crest Extra Whitening 130
Ultra Brite 133
Crest MultiCare Whitening 144
Colgate Baking Soda Whitening 145
Pepsodent 150
Colgate Tarter Control 165
Colgate 2-in-1 Tarter Control/White 200
FDA Recommended Limit 200
ADA Recommended Limit 250

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