Table of Contents
- 1 Where is Interglobular dentin found?
- 2 What is Interglobular dentin?
- 3 Where is tertiary dentin located?
- 4 Is dentine mesodermal in origin?
- 5 Where are Odontoblasts located?
- 6 Where are odontoblasts located?
- 7 What determines where the CEJ is placed on the tooth?
- 8 Which of the following is Endodermal in origin?
- 9 Which is the best description of an interglobular dentin?
- 10 Where are the secondary and tertiary dentin located in the tooth?
Where is Interglobular dentin found?
coronal dentine
Typical interglobular dentine was present in coronal dentine in most of the teeth. In the radicular dentin, position and size of the interglobular dentine was different among the teeth examined. Most of the teeth had the interglobular dentine in the cervical part of the roots (type A).
What is Interglobular dentin?
Interglobular dentine (IGD) is an area of poorly mineralized dentine matrix. It has been reported that there is an association between the retraction of odontoblast processes (OP) and the formation of IGD. A variation of the extent of OP has been described depending on the region of the tooth and age.
Where is tertiary dentin located?
This form of dentine can be easily distinguished on the surface of a tooth, and is much darker in appearance compared to primary dentine. Tertiary dentine will often not be visible on the surface of a tooth, but because it is more dense it can be viewed on a Micro-CT scan of the tooth.
How is Interglobular dentin formed?
Interglobular dentin formation, as described in textbooks of dental histology,’ 2 is the result of normal matrix formation but failure of complete fusion of the calcospherites during the calcification period that follows.
Where are Ameloblasts located?
Ameloblasts are cells present only during tooth development that deposit tooth enamel, which is the hard outermost layer of the tooth forming the surface of the crown.
Is dentine mesodermal in origin?
Tooth is built by cells originated from both ectoderm and mesoderm. Dentin is produced by odontoblasts derived from ectomesenchyme and these cells continue to exist in the pulp throughout life span.
Where are Odontoblasts located?
dental pulp
Odontoblasts are tall columnar cells located at the periphery of the dental pulp. They derive from ectomesenchymal cells originated by migration of neural crest cells during the early craniofacial development.
Where are odontoblasts located?
Is reparative dentine the same as tertiary dentine?
There are two subtypes of tertiary dentine, that secreted by the original odontoblasts in response to an appropriate stimulus, called reactionary dentine, and the reparative dentine formed by odontoblast-like cells, which arise from cells present in the dental pulp after the death of the original odontoblasts (Arana- …
Where are Ameloblasts derived from?
1 Origins of Tooth Cells Ameloblasts secrete enamel matrix and are derived from oral ectodermal cells. Odontoblasts produce dentine and develop from CNC cells, as do all other supporting dental cells. Ameloblasts are the only cells remaining in teeth at birth that are derived from the ectoderm.
What determines where the CEJ is placed on the tooth?
In only 5–10% of teeth, there is a space between the enamel and the cementum at which the underlying dentin is exposed….
| Cementoenamel junction | |
|---|---|
| The CEJ is the more or less horizontal demarcation line that distinguishes the crown (A) of the tooth from root (B) of the tooth. | |
| Identifiers | |
| MeSH | D019237 |
| Anatomical terminology |
Which of the following is Endodermal in origin?
(D) Liver: Liver is an important organ that is involved in the production of many hormones and also secretes bile juice. It is of endodermal origin.
Which is the best description of an interglobular dentin?
Dentin that contains spaces or hypomineralized areas between mineralized globules or calcospherites. in·ter·glob·u·lar space. Imperfectly calcified matrix of dentin situated between the calcified globules near the dentinal periphery; also called interglobular space of Owen. Synonym(s): interglobular dentin.
Where is the interglobular space of Owen located?
Imperfectly calcified matrix of dentin situated between the calcified globules near the dentinal periphery; also called interglobular space of Owen. Synonym (s): interglobular dentin. Want to thank TFD for its existence?
Where are the odontoblasts located in the dentin?
The dentinal tubules contain the cytoplasmic extensions of odontoblasts that once formed the dentin and maintain it. The cell bodies of the odontoblasts are aligned along the inner aspect of dentin against a layer of predentin where they also form the peripheral boundary of the dental pulp.
Where are the secondary and tertiary dentin located in the tooth?
Secondary dentin is a layer of dentin produced after the root of the tooth is completely formed. Tertiary dentin is created in response to a stimulus, such as a carious attack or wear. Primary dentin, the most prominent dentin in the tooth, lies between the enamel and the pulp chamber (near dentinoenamel junction).