ameloblast

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Words related to ameloblast

a cell from which tooth enamel develops

References in periodicals archive ?
In addition, under conditions of morbidity, the expression of Grp78 was found to be increased in ameloblasts involving ER stress induced by fluoride (Zhang et al., 2016), which causes fluorosis enamel.
Induction of human keratinocytes into enamel-secreting ameloblasts. Dev Biol.
The histopathological findings of the COC include basal layer of the epithelial lining presenting a columnar or cuboid appearance with a similar appearance to ameloblasts. It is also possible to observe a cellular arrangement that resembles the stellate reticulum of the enamel organ in the suprabasal layers [9, 14].
The first is columnar cells resembling normal ameloblasts that palisade around the epithelial islands, and the second are the more centrally located cells that resemble the stellate reticulum (12).
The epithelial stem cells divide asymmetrically into two cells; the first, called the sister cell, remains in the apical loop and is undifferentiated; the second moves towards the incisive margin and serves as the source of ameloblasts. In advanced stages of development, the dividing apical loop cells migrate in two directions, continuing the development of either the dental crown or the root [35,36].
Other possible causes suggested are: environmen- tal conditions, premature birth, perinatal compli- cations, exposure to dioxine by prolonged breast- feeding, respiratory diseases and oxygen shortage of the ameloblasts, calcium and phosphate meta- bolic troubles, oxygen starvation associated to low birth weight and febrile childhood diseases.
At this stage, epithelial cells near to the dentine differentiate into ameloblasts, and these secrete an enamel matrix while controlling enamel mineralisation and maturation [37].
The pores in the enamel subsurface are occupied by water as well as proteins, which are retained due to the effect of excessive levels of fluoride on ameloblasts [6].
GHRL was also detected in saliva as well as in several cells and tissues of the tooth germ, such as inner enamel epithelium, mesenchymal cells, ameloblasts, odontoblasts, and Hertwig's epithelial root sheath [19-21].
On histopathologic examination, the neoplasm showed presence of dental papilla characterized by homogenous non cellular material (dentin and enamel) lined by columnar epithelium cells (ameloblasts) embedded in myxomatous fibrous stroma thus confirming ameloblastic fibroodontoma.
Ameloblasts are cells present during tooth development that secrete large amounts of proteins that later mineralize to form tooth enamel.
Development of enamel is a complex organized process, where the ameloblasts lay down the enamel rods in an undulating and inter-twining path.
Ameloblasts within the developing tooth germ are very sensitive to external stimuli, and many factors can result in enamel abnormalities.
The process of amelogenesis is a complex and regulated by ameloblasts that requires secretion of certain matrix proteins that includes amelogenins, amelins, enamelins and tuftelins and the previously formed dentine.3 Literature survey revealed that amelogenesis has three phases that are pre- secretory, secretory, and maturation.3