The Happy Tooth is a registered trademark

Trademark

A trademark, trade mark, or trade-mark is a distinctive sign or indicator used by an individual, business organization, or other legal entity to identify that the products or services to consumers with which the trademark appears originate from a unique source, and to distinguish its products or...

 which stands for guaranteed toothfriendly

Toothfriendly

Toothfriendly products are safe for teeth. To replace sugar, toothfriendly products often contain sweeteners that are not fermented by the microflora of the dental plaque. Products that are certified as toothfriendly also do not contain excessive amounts of food acids...

 quality.

The Happy Tooth mark distinguishes products that are not harmful for teeth. All products carrying the Happy Tooth symbol have been scientifically tested and found not to be cariogenic or erosive.

The compliance of a product is tested by means of intraoral pH telemetry. Applying a standardized method, the plaque

Dental plaque

Dental plaque is a biofilm, usually a pale yellow, that develops naturally on the teeth. Like any biofilm, dental plaque is formed by colonizing bacteria trying to attach themselves to a smooth surface...

 pH is measured at least in four volunteers during and for 30 minutes after consumption of the product with an indwelling, interproximally placed, plaque-covered electrode. Products which do not lower plaque pH

PH

In chemistry, pH is a measure of the acidity or basicity of an aqueous solution. Pure water is said to be neutral, with a pH close to 7.0 at . Solutions with a pH less than 7 are said to be acidic and solutions with a pH greater than 7 are basic or alkaline...

 below 5.7 under the conditions of this test, lack a cariogenic potential. The erosive potential is measured with a plaque free electrode. The acid

Acid

An acid is a substance which reacts with a base. Commonly, acids can be identified as tasting sour, reacting with metals such as calcium, and bases like sodium carbonate. Aqueous acids have a pH of less than 7, where an acid of lower pH is typically stronger, and turn blue litmus paper red...

 exposure of the teeth must not exceed 40mmol H min.

The test is conducted by independent university institutes.

Toothfriendly International grants the rights to use the trademark.