Let me paraphrase the famous philosopher of antiquity: “You’re breathing - so you exist!“ And so, let’s go... interesting facts about such an important process for life as breathing.
6 rules for effective tooth brushing
Tooth enamel is 92-96% inorganic substances. Most of the enamel is calcium - up to 39% and phosphorus - up to 19%. It is the ratio of these elements that is mainly responsible for the health of our teeth