How many teeth does a person normally have

Teeth are an indispensable component of the normal oral activities of the human body, so everyone should pay attention to dental health and clean their teeth regularly to have healthy and beautiful teeth. If a person's teeth lose their normal chewing function, it will affect their gastrointestinal digestive system and cause harm to their entire body. So this also shows the importance of teeth, but how many teeth does a normal person have?

How many teeth does a normal person have?

A normal adult can have 28 to 32 teeth, but only 28 of them are truly functional. It is normal for a person to have 28 to 32 teeth, 28 of which are symmetrical above and below, including left/right central incisors, left/right incisors, left/right canines, left/right first premolars, left/right second premolars, left/right first molars, and left/right second molars, totaling 28 teeth. There are also 4 wisdom teeth, but some people have wisdom teeth while others don't. It is normal to have any number of them.

What are teeth made of?

Teeth are the hardest organs in the human body. In addition to performing functions such as cutting and chewing, they also maintain facial appearance and assist pronunciation. They are divided into three parts: the crown, neck and root. They are further divided into enamel (enamel), dentin (dentin), pulp (nerve gland), etc. The main component is alkaline calcium phosphate, which is slightly soluble in water. This is the main cause of tooth damage. It can react with sodium fluoride in toothpaste to produce harder and less soluble calcium fluorophosphate.

When do children lose their teeth?

When children are 6 to 7 years old, the deciduous central incisors (central front teeth) of their mandibular teeth begin to shake and fall out. Soon, the permanent central incisors grow out at this location. At the same time, the first molars grow behind the second deciduous molars. After that, other teeth are gradually replaced. The permanent monocuspids and bicuspids can only grow out after the deciduous teeth in the same position fall out. The deciduous teeth are all fallen out and the permanent teeth are replaced by them until they are 12 to 13 years old. The second molars grow behind the first molars at 12 to 14 years old, and the third molars grow after 18 years old. However, it is normal for some people not to have third molars.

What is the function of human teeth?

1. Incisor group: The incisors use their cutting edges to cut food into pieces under the coordinated action of the masticatory muscles. There are 4 central incisors and 4 lateral incisors adjacent to the central incisors. The central incisors and lateral incisors form the incisor group.

2. Canine group: Canines are commonly known as tiger teeth. They can tear food into pieces. They are thick and have long roots. They are deeply buried in the jawbone and can withstand great force. There are 4 of them, making up the canine group.

3. Molar group: The molars transport the food bitten off by the incisors or torn off by the canines to the large molars for grinding by the tongue to facilitate digestion and absorption by the gastrointestinal tract. There are 8 premolars and 8 or 12 molars.