What are the histopathological zones in dentine caries?
The small enamel caries is placed under a well-mineralized surface layer, and has four histological zones: the translucent zone, the dark zone, the body of the lesion and the surface zone, described for the first time by L. M. Silverstone [7,8,10].
What are the zones of enamel caries?
As the enamel loses minerals, and dental caries progresses, the enamel develop several distinct zones, visible under a light microscope. From the deepest layer of the enamel to the enamel surface, the identified areas are the: translucent zone, dark zones, body of the lesion, and surface zone.
What is the structure of dentin?
Dentin is capped by a crown made of highly mineralized and protective enamel, and in the root, it is covered by cementum, a structure implicated in the attachment of the teeth to the bony socket….Table 1.
| Mineral phase | 70% in weight | 40–45% in vol |
|---|---|---|
| Organic matrix | 20% in weight | 30% in vol |
| Water | 10% in weight | 20–25% in vol |
Which mineral is deposited in the dentine and enamel of the tooth as it is being formed?
By volume, 45% of dentin consists of the mineral hydroxyapatite, 33% is organic material, and 22% is water. Yellow in appearance, it greatly affects the color of a tooth due to the translucency of enamel….
| Dentin | |
|---|---|
| FMA | 55628 |
| Anatomical terminology |
What is the difference between affected and infected dentin?
Infected dentin is soft due to the lack of mineral content or collagen network. Its consistency can be likened to cottage cheese. Affected dentin is firmer than infected dentin due to the presence of the collagen network and some mineral content. Its consistency may be referred to as leatherlike.
How many zones are seen in dental caries?
Caries Detector staining reveals 4 zones in dentin containing caries lesions, but characteristics of each zone are not well-defined. We therefore investigated the physical and microstructural properties of carious dentin in the 4 different zones to determine important differences revealed by Caries Detector staining.
What is dental caries PDF?
Case Definition : Dental caries is an infectious microbiologic disease of the calcified tissues of the teeth, characterized by demineralization of the inorganic portion and destruction of the organic substance of the tooth.
What is dental caries Slideshare?
DEFINITION (DENTAL CARIES) Dental caries is a multifactorial microbial infectious disease characterized by demineralization of the inorganic and destruction of the organic substance of the tooth.
Why is the dentin considered a vital structure?
The permeability of the dentin is essential to support the physiology and reaction patterns of the pulp-dentin organ. Nutrients and impulses are transported from the pulp via the odontoblast process and the contents of its tubules maintain the dentin as a vital tissue.
Which are the Hypocalcified structures of dentin?
Some areas in enamel are hypocalcified: enamel spindles. Dentin or dentine is a tier of matter that lies right away below the enamel of the tooth.
What is the function of the dentine in the teeth?
Dentin reinforces the tooth’s enamel and helps to support the structure of the tooth, but it also plays an important role inside the tooth. Dentin forms the layer of the tooth that surrounds the dental pulp, the soft tissue which makes up the inside of the tooth.
What is tooth dentine?
Dentin. That part of the tooth that is beneath enamel and cementum. It contains microscopic tubules (small hollow tubes or canals). When dentin loses its protective covering (enamel), the tubules allow heat and cold or acidic or sticky foods to stimulate the nerves and cells inside the tooth, causing sensitivity.
