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The enamel organ is responsible for the formation of enamel, initiation of dentine formation, establishment of the shape of a tooth's crown, and establishment of the dentoenamel junction. [1] The enamel organ has four layers; the inner enamel epithelium, outer enamel epithelium, stratum intermedium, and the stellate reticulum. [1]
The columnar cells of the enamel organ adjacent to the enamel papilla are known as inner enamel epithelium (IEE). The cells between the IEE and the stellate reticulum form a layer known as the stratum intermedium. The rim of the enamel organ where the outer and inner enamel epithelium join is called the cervical loop. [23]
Enamel can be affected further by non-pathologic processes. Enamel is covered by various structures in relation to the development of tooth: Nasmyth membrane or enamel cuticle, structure of embryological origin is composed of keratin which gives rise to the enamel organ. [18] [19]
It is organized into three parts: the enamel organ, the dental papilla and the dental follicle. [27] The enamel organ is composed of the outer enamel epithelium, inner enamel epithelium, stellate reticulum and stratum intermedium. [27] These cells give rise to ameloblasts, which produce enamel and the reduced enamel epithelium.
The enamel organ → purely the epithelial component; The tissues which have been derived from each of the three components are: The dental follicle → will develop to become the periodontal ligament, the cementum and the alveolar bone; The dental papilla → will develop to become the dental pulp and the dentine; The enamel organ → will ...
The outer enamel epithelium, also known as the external enamel epithelium, is a layer of cuboidal cells located on the periphery of the enamel organ in a developing tooth. This layer is first seen during the bell stage. The rim of the enamel organ, where the outer and inner enamel epithelium join is called the cervical loop.
A: enamel organ B: dental papilla C: dental follicle. The dental follicle, also known as dental sac, is made up of mesenchymal cells and fibres surrounding the enamel organ and dental papilla of a developing tooth. [1] It is a vascular fibrous sac [2] containing the developing tooth and its odontogenic organ.
In the tooth bud, regions where enamel formation is completed, the enamel organ gives rise to Hertwig's epithelial root sheath, composed of two epithelial layers derived from the external and internal epithelia. The sheath is irregularly fragmented in time and space as it promotes cementum deposition on the newly formed dentin.