Each tooth has a crown, a neck and a root. The crown is located above the gum and is covered with enamel – the hardest substance in our body. The roots attach the tooth to the jaw bone. The root of the tooth covers a layer of cement – a special substance necessary to hold the tooth in its hole. Depending on the variety, a tooth can have from one to three roots. The bulk of the tooth consists of a solid substance – dentin. In the dentin thickness of each tooth there is a cavity filled with soft contents – pulp. Through a narrow hole in the root of the tooth, nerves and blood vessels pass into the pulp. The gum forms a protection around the neck of the tooth.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.