Scientific evidence

The following figures demonstrate the loss of enamel due to erosion and to abrasion of erosion-softened enamel caused by toothbrushing in an in situ study (German University 2011).

Half of each sample was shielded off with a light-curing resin and served as the reference area, while the other half was exposed to acid.
Samples were worn on removable buccal appliances (3 samples on the left side, 3 samples on the right side).
The appliances were carried in the oral cavity for 7 days, during this time the samples were exposed to erosive challenges 6 x 2 minutes a day. A placebo toothpaste, a sodium fluoride toothpaste (1400 ppm) or elmex® EROSION PROTECTION toothpaste was used twice daily. Samples of the left buccal were brushed; samples on the right side were only treated with saliva-toothpaste suspension.
Samples were analysed profilometrically and SEM images were taken.
SEM images of enamel samples worn in situ after exposure to several erosive acid attacks

The upper-left parts always show the unexposed reference area and the lower-right parts the exposed area (to erosive challenges and brushing with a: placebo toothpaste;
b: NaF toothpaste; c: elmex® EROSION PROTECTION toothpaste).
Bigger magnifications of the exposed areas (a: placebo toothpaste; b: NaF toothpaste;
c: elmex® EROSION PROTECTION toothpaste).


  • Using elmex® EROSION PROTECTION toothpaste resulted in up to 47% less enamel loss than the NaF toothpaste and up to 61% less enamel loss than the placebo toothpaste.
Twice daily brushing with elmex® EROSION PROTECTION toothpaste for 7 days significantly reduced in situ erosive and erosive/abrasive enamel loss compared to both control toothpastes (p < 0.05).

  • Daily use of elmex® EROSION PROTECTION toothpaste provides significantly better protection against erosion and against toothbrushing-related loss of softened enamel than a NaF or a placebo toothpaste.
Therefore, elmex® EROSION PROTECTION toothpaste is highly recommended for people at risk of erosion and patients with erosion for performing their normal daily oral hygiene.