The primary teeth (deciduous) teeth are baby and young children, has 20 teeth.
The permanent teeth are the teeth that will serve a lifetime, begin erupting from 6 years old, and will be replacing the teeth of the first dentition up to the age of a teenager. The permanent dentition consists of 32 teeth, at the age of 16 to 25 years old can reach the third molars erupt (called "wisdom teeth or third molars").
The teeth are mineralized tissue structures begin to develop from embryonic life, and initiate its eruption in the first six months of life, which helps the process of chewing food for proper digestion . The tooth does the first stage of digestion and also participates in oral communication.
Basically in the tooth can recognize two parts , the crown , part covered by dental enamel and root not visible in a healthy mouth. The teeth sorted from the center to the jaws are cutting incisors , canines that tear , premolars and molars to grind grinding.
Parts of the Dentist Science
Dental enamel : a tissue composed of hydroxyapatite and protein ( very seldom ) . It is the hardest tissue in the human body . In areas where the glaze is thinner or worn , can be extremely sensitive . Enamel is translucent , insensitive to pain because the nerve endings do not exist . With fluoride crystals fluorhydroxyapatite that is much more resistant to attack than hydroxyapatite dental cavities form .Dentin mineralized tissue , but to a lesser extent than enamel. It is responsible for the color of teeth . Contains tubules where odontoblast project . Dentin provides elasticity to fragile but hard enamel.
Dental Cement: highly specialized connective tissue. It is a hard , opaque , yellowish dentin layer covering the root level of the tooth. Is responsible for attaching the dental piece with the rest of the mandible or maxilla.
Dental pulp : mesodermal tissue is constituted by a soft tissue containing blood vessels ( arteries and veins ) that carry blood to the tooth nerve fibers that give tooth sensitivity . The ribs traverse the root ( tooth ) via fine channels . Its main cell are odontoblasts ( cells are both pulp and dentin ), they are manufactured and dentin are those that maintain the vitality of the dentin. The odontoblasts have extensions known as staying odontoblastic processes in the dentinal tubules. In the dental pulp is hosted nervous vasculo package consists of a nervous thread , a vein and an artery giving the necessary vitality and innervation .
Periodontium: are the structures that support the teeth and sustainability.
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