Steve is a famous dentist who is writing about the composition of hygienic toothpaste. Read the text and put the parts of the sentences below into the gaps.
Write one letter in each gap.
Hygienic toothpaste [ ] main properties: cleaning the enamel and freshening the breath. At the same time, a number of requirements are imposed on it.
High-quality removal of daily plaque. For this, finely dispersed abrasive substances are used: silicon dioxide and calcium carbonate. They do an excellent job of cleaning the [ ] on the surface of the teeth during the day and protects your permanent teeth against decay. Efficiency is assessed by the abrasiveness index. It should be between 25 and 100 units, depending on the sensitivity of the enamel.
No sugar in the formula. For the decomposition of sugars, substances contained in the enamel are used. This leads to wear and tear and tooth decay. The main sugar substitute in the paste formula is xylitol. It reduces the number of [ ] lead to tooth decay. It can save your teeth and roots.
Nice aftertaste. This indirectly affects the quality of cleaning. Products with fragrances are more pleasant to use, so people spend longer and more thoroughly [ ] hygiene. Substances [ ] can be divided into synthetic and natural. The first can significantly reduce the cost. The latter do not harm human health. They are most often represented by essential oils: limonene, menthol, carvacrol, thymol.
A. performing oral
B. should have two
C. microorganisms that can
D. included in the formulation
E. soft plaque that forms