Teeth candid aligners review - Histological Structure:
We already know the anatomical structure of the teeth - it's time to look at their histological structure, i.e. to consider what tissues they consist of. If all your knowledge comes down to a simplified drawing from a biology textbook.
Both deciduous and candid aligners review permanent teeth are made of the same tissues. The four main components that make up a tooth are enamel, dentin, cement and pulp. The first three are hard tissues - highly mineralized and composed of organic compounds. Thus, the only living tissue - innervated and vascularized - is the pulp.
Enamel - covers the tooth and is a layer on its surface. It covers the entire crown and starts at the tooth neck. The enamel is close to 1-2 mm thick and composed almost entirely (96-99%) of inorganic substances. In addition to fluoro- and hydroxyapatites tightly woven into a crystal structure, there is room for a few percent of water and organic compounds. The basic feature of glaze is its hardness , which is similar to that of topaz used in jewelry. During odontogenesis (tooth development), the ameloblast cells produce enamel and lay the crystals in layers until it is full thickness. What is very important, when the teeth erupt, they lose the layer of these cells, and therefore we are not able to naturally add an additional enamel coating.
Dentin - a layer under the enamel or cement (when it comes to the roots of the teeth) surrounding the pulp. It is part of not only the crown, but also the tooth roots. Thick as a few millimeters, it is candid aligners review composed of 20% organic substances (especially silver-absorbent and collagen fibers) and 70% of mineral compounds that ensure its hardness. When we look at the dentin under a microscope, we see that instead of a single block of hard tissue, it is a layer cut by many tiny dentinal tubules.. They go from the pulp to the enamel, but most of them end in the dentin. Each dentinal tubule contains an extension of the dentine-producing pulp cell (odontoblast), tubular fluid, and a nerve fiber. Odontoblasts - unlike ameloblasts - are present long after tooth eruption and produce dentin almost throughout life (unless the tooth is dead, e.g. after root canal treatment). The dentin can be: primary - that is, it is produced during the development of the tooth. Primary dentin deposition ends when the tooth root tip is formed , secondary - arises after the end of tooth development and is produced until death; it appears to be the same as primary dentin, but tends to be candid aligners review less regular, tertiary- produced in response to pathological stimuli; it occurs as reactive or repair dentin.
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