Is food grade sodium hexametaphosphate an effective ingredient in whitening toothpaste?

 With the improvement of people's quality of life, how to whiten teeth has become part of more and more people's pursuit of better life. More and more people are beginning to realize that oral care and teeth whitening have gradually become a fashionable and healthy way of life, just like skin care and fitness, it is an improvement of their overall image and charm index. Is food grade sodium hexametaphosphate also an effective ingredient in whitening toothpaste?


Teeth are not white because of the staining of the tooth surface, and the staining of the tooth surface is divided into exogenous staining and endogenous staining. Let's first understand what are the effective ingredients in whitening toothpaste?

1. Friction agent: The most widely used toothpaste friction agent is precipitated silica. It has the advantages of uniform particle size, moderate hardness, smooth surface, stable chemical properties, and good compatibility with other ingredients in toothpaste such as fluoride.


2. Chemical components: The effective chemical components in whitening toothpaste mainly include surfactants, calcium chelating agents, enzymes, polymers and oxidants, etc., which assist in the removal of tooth surface staining through different mechanisms of action. For example, sodium hexametaphosphate, sodium tripolyphosphate, etc. Among them, sodium hexametaphosphate and sodium tripolyphosphate can make the pigment on the tooth and its surface easier to separate, and can competitively bind calcium ions, which has a certain effect on preventing the formation of tartar and the deposition of pigment.


Studies have shown that toothpaste containing sodium hexametaphosphate and sodium tripolyphosphate can make the acquired film on the surface of the dentin have a more open structure, which makes the colorant easier to discharge.


3. As a biological agent, enzyme is gradually used in toothpaste products because of its safety and high activity. However, currently the enzyme-containing toothpastes on the market are generally used to sterilize and reduce inflammation, prevent dental caries, and reduce the symptoms of bleeding gums. Toothpastes that have a whitening effect through enzymes are rare.


In addition to conventional friction agents, it also contains pentasodium tripolyphosphate and glucanase. Sodium tripolyphosphate mainly plays a role of chemical adsorption. Sodium tripolyphosphate is a linear condensed sodium phosphate commonly used in whitening toothpaste, which can effectively remove exogenous staining on the tooth surface. Glucanase is the main feature of this "enzyme toothpaste". Studies have shown that 0.12% glucanase can decompose dental plaque and inhibit the formation of dental plaque through the action of enzymes.


Food grade sodium hexametaphosphate and tetrasodium pyrophosphate are commonly used in toothpaste, but the longer the side chain in the adsorption process, the better the effect of adsorbing pigments. Therefore, the effect of sodium hexametaphosphate is better.

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