What are the classifications and functions of teeth? What is the division of teeth?

The number of teeth in mammals can be written: (upper) number of incisors, (upper) number of canine teeth, (upper) premolars, (upper) molars (lower) number of incisors, (lower) number of canine teeth, (lower) premolars, (lower) molars, for example, the human tooth pose can be written 2,1,2,3 2,1,2,3. It means that there are 2 incisors on the maxillary side of the human maxilla, 1 canine, 2 premolars, 3 posterior molars, and the same is true for the lower jaw.

The tooth type is an important basis for the classification of mammals.

Since humans belong to the primate class, the layout of human teeth and the tooth pattern are the same as those of other primates, i.e., 2,1,2,3 2,1,2,3. There are a total of 32 teeth. But human teeth are also different from other primate teeth, most notably because human canines are not as long and sharp as those of other primates.

This is the most significant difference between humans and other primates, and it is often used in paleoanthropology to distinguish hominids from apes. Although human canines are significantly degraded compared to other primates, human canines are still the strongest compared to other human teeth. The roots of canines are longer and thicker than all other teeth, and their roots are deeply embedded in the jawbone.

If you don't believe me, you can feel the gums and roots of your canine teeth and compare them with other teeth. There is a gender difference in human canine teeth, which is an important reference in the sex determination of human bones. In addition, the reduction of the upper and lower jaws in humans prevents many people from erupting their wisdom teeth, the last posterior molar.

Many people have only 28 teeth in their lifetime.

Teeth are classified in a very fine way in the medical profession, what are the specific classifications?

Teeth are classified in the medical profession very finely, what are the specific classifications, if classified according to the growth time of the teeth, they can be divided into deciduous teeth and permanent teeth, if classified according to morphology and function, teeth can be divided into four categories, incisors, canines, premolars and molars.

There are 8 incisors located in the front of the mouth, and their main function is to cut food. The canines are located at the corners of the mouth, there are 4 in total, the crown is thick, the root is long and thick, and the main function is to puncture and tear food. The premolars, also known as bicuspids, are located behind the canines and before the molars, with a total of 8.

Its main function is to assist in tooth tearing and to assist in grinding teeth to mash food.

Now, with the current development of oral technology, dental implants have helped many patients to solve various dental problems, allowing patients to have beautiful teeth and thus regain their self-confidence. For dental implants, the implant is the most important part, and if the implant is not selected well, then the operation may eventually fail, so it is very important.

For the restoration of teeth, it is not once and for all, the condition of the soft and hard tissues of the oral cavity will change over time, and there are also problems such as wear and tear and aging of restorations, especially mobile restorations. After the restoration, it is important to pay attention to protection, pay attention to regular review, and find problems in time to deal with them in time to better protect your oral health.

At present, the more popular method is a two-piece implant, i.e. the implant abutment and retainer are divided into two segments instead of a single type of implant. Two-stage implants: During surgery, the retainer and the abutment combined with the gingival tissue are surgically placed twice before and after, so it is called a two-stage retainer, and between the abutment and the retainer are connected to the implant center screw to form a whole. This two-piece implant is a good prosthesis because of its good osseointegration, so it is not easy to infect the patient's dentures.

Teeth are classified in the medical profession very finely, what are the specific classifications, if they are classified according to the growth time of the teeth, they can be divided into baby teeth and permanent teeth, if they are classified according to their form and function, teeth can be divided into four categories, incisors, canines, premolars and molars.

I don't understand very well, do you mean the position number of the teeth?

Generally, the front teeth are 1 tooth, 2 teeth, and 2 is called the incisors.

No. 3 is the canine, that is, the canine tooth, which is the bicuspid, and 678 is the plate tooth, which is called the molar.

What is written on the paper is where you are facing the patient. ABCD represents the patient's upper right, upper left, lower right, lower left, and can also be used as numbers, and 1234 represents the patient's upper right, upper left, lower left, and lower right respectively, don't get confused.

This pig's head, I don't know what to do, so I packed it up and left.

Categories: Medical & Health >> ENT.

Analysis: How teeth are classified.

In terms of the appearance of the teeth, the teeth are composed of three parts: the crown, the root and the neck. The crown is the part of the outer layer of the tooth that is covered by enamel and is the main part that performs the masticatory function. The root is the part of the outer layer of the tooth that is covered by the cementum and is also the supporting part of the tooth; Some teeth have a single root, some have multiple teeth, and the tip of each root is called the apex; Each apex has a small hole through the pulp vascular nerve called the apical foramen; Normally, the root of the tooth is completely embedded in the alveolar bone.

The junction between the crown and the root of the tooth is in an arc-shaped curve, called the neck, also known as the neck margin or neckline.

From the cross-section of the tooth, the tooth body is composed of four layers: enamel, cementum, dentin and pulp. Tooth enamel forms the surface layer of the crown and is a translucent white hard tissue, the hardest tissue that is highly calcified in the tooth tissue. Cementum is the yellowish hard tissue that forms the surface of the tooth root.

Dentin forms the main body of the tooth and is located in the inner layer of the enamel and cementum, which is not as hard as the enamel, and there is a cavity in it called the pulp cavity. The pulp is a honeycomb that fills the pulp cavity and contains blood vessels, nerves, and lymph. It is the only soft tissue in the tooth tissue.

According to the morphological characteristics and functional characteristics of teeth, teeth are divided into four categories: incisors, canines, bicuspids, and molars. The incisors are located in the front of the oral cavity, with a total of 8 left, right, upper and lower teeth, and the crown of the adjacent tooth is wedge-shaped, with a thick neck and thin incision margin, and its main function is to cut off food, which is a single root. The canine teeth, commonly known as canines, are located at the corners of the mouth, with a total of 4 left, right, upper and lower, the crown is still wedge-shaped, and there is a protruding cusp on the incisal margin, the main function is to puncture and tear food, and it is a single root that grows up stout and grows.

Bicuspid teeth, also known as premolars, are located behind the canines and before the molars, with a total of 8 left, right, upper and lower, the crown is cubic, there is a occlusal surface, there are generally double cusps on it, and the second bicuspid of the lower jaw has three cusps, the main function is to assist the canines to tear food and assist the grinding teeth to crush food, the tooth root is flattened, and there are also bifurcated people. Molars are located behind the bicuspids, left, right, upper and lower, a total of 12, the crown is large, cubic, there is a wide occlusal surface, there are 4 5 cusps on it, the main function is to grind food, generally the maxillary molars are three, and the mandibular molars are double.

Teeth are divided into baby teeth and permanent teeth based on how long they have been present in the mouth. Baby teeth begin to erupt in 7 or 8 months after birth, and all the baby teeth erupt around the age of 20 to years, and the baby teeth gradually fall out and are replaced by permanent teeth, which is called the replacement period or mixed dentition. Therefore, the time of baby teeth in the oral cavity is 5 to 10 years.

Around the age of the deciduous teeth, the occlusion period is the period. Permanent teeth are the second set of dentition after the loss of baby teeth, which will not fall out unless due to disease or accidental injury, and there is no tooth to erupt and replace after loss. The first permanent molars begin to develop from the embryo in April and begin to erupt at the age of 6 years, and are the first permanent teeth to erupt and do not replace any baby teeth.

12 After the age of 13, all the baby teeth fall out, which is called the occlusion period of permanent teeth.

How teeth are classified.

Teeth are first divided into deciduous teeth and permanent teeth Deciduous teeth are generally replaced around the age of twelve, and are called permanent teeth alternately Deciduous teeth are divided into deciduous incisors, deciduous lateral incisors, deciduous canines and deciduous molars, and deciduous teeth are those without bicuspids Permanent teeth are divided into incisors, lateral incisors, canines, bicuspids (premolars) and molars Incisors to canines are called anterior teeth, and later called posterior teeth Incisors, lateral incisors, and four upper and lower canines A total of eight bicuspids Molars are also However, people also have a kind of tooth called wisdom teeth, but not everyone has them, and the number varies from 1 to 4, Rare with more than 5 If there is a problem with differentiation during human development, then the number of teeth may increase or decrease, and the extra teeth that are added are called supernumerary teeth, and the decrease is called congenital deletion.

What is the classification and function of teeth?

Teeth are divided into four categories: incisors, canines, bicuspids, and molars.

The incisors are located in the front part of the oral cavity, with a total of 8 left, right, upper and lower teeth, and the adjacent crown is wedge-shaped, with a thick neck and thin incision margin, which is a single root; Canine teeth, commonly known as canines, are located at the corners of the mouth, with a total of 4 left, right, upper and lower, the crown is still wedge-shaped, and there is a prominent cusp on the incision; Bicuspids, also known as premolars, are located behind the canines and before the molars, with a total of 8 left, right, upper and lower crowns, and a occlusal surface; The molars are located behind the bicuspids, with a total of 12 left, right, upper and lower crowns, large crowns, cubic shapes, and a wide occlusal surface. In general, the incisors are like knives used to cut food; Fangs have sharp cusps that are used to pierce and tear food; Teeth grinding is like a grinding disc used to grind food.

By time: deciduous and permanent teeth, by type: incisors, canines, premolars, and molars.