Understanding how many teeth a person has is very entertaining. Many people think that there should be 32 teeth. However, 28 teeth are also the norm. In children, the number of units is much less. For this reason, the norm is a relative concept: it is directly determined by the age of a person. If arc defects are diagnosed, restoration is performed.
How many teeth should a person have?
To understand this issue, it is important to find out what is the purpose of these solid formations. The function of the teeth directly depends on their shape and position in the row. Such formations are used to divide food into small fragments and then chew. The upper and lower teeth provide a protective function. They prevent the entry of harmful viruses and bacteria from the environment into the body. For this reason, human immunity depends on how many teeth. Also, these formations are involved in the pronunciation of sounds.
The first formations erupt when the baby is 5-8 months old. In rare cases, teeth appear much earlier (at 2-3 months). In premature babies, this physiological process is delayed. Most of the teeth in children erupt by 10-12 months. In addition, the appearance of such formations is late in babies with signs of rickets. However, if by the age of one year the crumbs do not have a single tooth, parents should definitely inform the doctor about this problem.
In total, the baby has 20 milk units. Normally, a child has so many teeth by the age of 2.5-3 years. However, in practice, this indicator is individual. In some cases, 18-19 units erupt in crumbs in a year and a half. Such an advance is a deviation, therefore, in such a situation, the baby must be shown to a pediatric dentist.
Starting from the age of 6, temporary formations begin to be gradually replaced by permanent ones. Most molars appear in children between the ages of 6 and 12. “Eights” erupt at the age of 17-35 years. For some, they may not come out at all or appear not in full strength (1-2 units). How many teeth an adult has is influenced by various factors, including age.
Over time, a whole series of changes occur in the oral cavity:
- By the age of 20, tooth enamel is slightly smoothed out.
- After 30, a bone formation appears on the edges of the units – dentin.
- By the age of 45, there is a strong abrasion of the crowns.
- For those who have crossed the line of 60 years, intensive wear of the enamel occurs.
- By the age of 70, only roots and necks remain from natural units.
How many wisdom teeth does a person have?
Normally there should be 4 extreme molars. However, in practice things are different. How many wisdom teeth can grow in a person is influenced by the following factors:
- Climatic conditions. Residents of the southern regions receive vitamin D in full, so in most cases they have all the outer molars.
- hereditary predisposition. If the parents had the entire set of wisdom teeth, it is likely that the matured child will have all the units.
- Nutrition feature. According to statistics, 80% of people who consume raw vegetables and fruits have all the “eights”.
Until what age do teeth grow?
It is difficult to give a definite answer. Dentists note that by the age of 12, a teenager has 28 teeth. The process of eruption of the extreme molars can be delayed up to 35, and sometimes up to 40 years. However, up to what age wisdom teeth grow is difficult to predict. In each case, this process develops according to an individual scenario. In practice, it happened that the “eight” appeared even at the age of 70.
Types of human teeth
Although such formations have similar features, they differ greatly from each other. There are such types of teeth:
- incisors – the sharpest formations. They have a slightly convex front and a slightly concave back. In most cases, the units on the top row have the largest crown, while those on the bottom have the smallest. Such teeth are considered very weak. They take part in biting off food. The chewing load is not able to withstand. That’s how many teeth an adult has – they should have 8 units.
- fangs – have a conical shape. They are located immediately after the incisors. Such formations are designed to tear off pieces of food. There are 4 units of fangs in the oral cavity.
- Premolars (they are also small molars) – These are teeth that have one or two roots. Each of these formations has 2 tubercles on the chewing surface. The purpose of such teeth is to tear food into pieces and grind it.
- molars are sixes and sevens. Such root formations outwardly resemble tubercles with “grooves” – fissures. How many teeth a person has depends on many factors, but normally there should be 8 units.
- Third (or extreme) molars – these are “eights” or “wisdom teeth”. Normally, there should be 4 formations.
Numbering of teeth in dentistry
This system is designed to diagnose pathologies and specify them. However, it has its own characteristics. Such numbering of teeth for an ordinary patient is sometimes incomprehensible and illogical. For example, while at the dentist, a person may hear that he has a problem with the 39th or 45th unit. What you heard is in no way comparable to how many teeth a person should normally have in his mouth.
In fact, the whole secret is in particular numbering. It starts with the number “11” and looks like this (location of blocks):
- 11-18 – upper right;
- 21-28 – upper left;
- 31-38 – lower left;
- 41-48 – lower right;
- from the 51st – dairy units.
Anomalies of the dentition
This is a pathological change in the shape and length of the arcs. Such deformation affects not only the aesthetic appearance, but also the functionality of the entire system. Such pathologies are provoked by genetic abnormalities, diseases suffered in infancy, and bad oral habits (for example, thumb sucking).
The dentition may have such violations:
Defects in the dentition
They are due to the absence of one or more units. Such defects have the following causes:
- genetic predisposition;
- periodontal disease;
- failure in the functioning of the endocrine system;
- the root of the tooth is infected;
- neoplasms in the oral cavity;
- mechanical damage.
Restoration of the dentition
The loss of at least one unit negatively affects both the aesthetic appearance and the functioning of the entire digestive system (the process of digestion of food begins in the oral cavity). For this reason, the question of how many teeth a person has is very important. In the event of an anomaly or defects in the arc, restoration is carried out. The lower teeth and upper units provide for the following corrective measures:
- Removable prosthetics is an available recovery method. A system is used that provides for the attachment of all-ceramic crowns to plastic gums. Such prostheses can replace both the entire row and a small part of it.
- permanent dentures – dental bridges. A design that involves the use of a support (they are “live” teeth, they collapse over time due to increased load).
- Implantation – a procedure in which not only the crown is restored, but also the root system.