In humans, the chewing function is mainly carried out by molars and premolars who, by rubbing one on the other, reduce the food to a pulp. Incisors and canines, on the other hand, allow you to tear up shreds of food by grinding it coarsely.
Each tooth lodges in a cavity in the mandible or maxilla called the dental alveolus.
In each tooth, three parts are distinguished:
Crown
The crown is the part of the tooth that protrudes from the alveolus. Visible to the naked eye, it assumes a different shape depending on the type of tooth: in the incisors it is flattened and sharp, in the canines pointed and enlarged, in the molars and premolars it has different cusps .
Collar
The collar is located between the root and the crown where it forms a transitional tissue around which the moss forms the gum.
Roots
One or more roots are inserted into the alveolus and are anchored to its walls by ligaments of connective tissue (periodontal ligament). The root is unique in the incisors, canines and lower premolars, while it is double or triple in the upper premolars and molars. .
very resistant yellowish. It has the function of protecting the pulp from temperature variations and mechanical stresses. Not surprisingly, the teeth are the most mineralized organs of the human organism., a particular very resistant and mineralized white epithelial tissue that has the task of protecting the tooth from external aggressions. At the level of the collar and the roots, the dentin is covered by another type of bone tissue, called cement, which anchors it to its seat.
). It continues in a canal that runs through each of the roots (root canal) and then flows into the alveolus with a small hole, through which blood vessels and nerves penetrate the tooth. It contains particular cells, the odontoplasts, which have the function of producing the dentin necessary for the renewal processes.
The sensitivity of the tooth is due precisely to the presence of nerve endings inside the dental pulp. Each tooth has a tactile, thermal and pain sensitivity.
To know more:
Dental Pulp Sensitive Teeth begins around the 6th-8th month of life, when the first of the 20 deciduous teeth (milk teeth) begin to appear. Of these, only the 4 molars remain for life while the others are gradually replaced starting from the 6th-7th year.The number and type of mammalian teeth can be expressed by the dental formula.
Above the line, the number of incisors, canines, premolars and molars placed on the middle of the jaw are shown from left to right; below the line are indicated the same teeth placed on the middle of the mandible:
In humans, the final set of teeth corresponds to 32 teeth: 4 incisors, 2 canines, 4 premolars and 6 molars on the maxilla and as many on the mandible.
