Histopathology of Enamel and Dentine Caries

<p>Reparative dentine originates from surviving upregulated odontoblasts, while reactionary dentine originates from local cell death in the odontoblast layer. (D)</p> Signup and view all the answers

<p>Zone of demineralization (A)</p> Signup and view all the answers

<p>Translucent (Sclerotic) Zone (B), Zone of demineralization (C)</p> Signup and view all the answers

<p>To provide protection for the pulp (D)</p> Signup and view all the answers

<p>The loss of mineral content (C)</p> Signup and view all the answers

<p>Presence of fermentable carbohydrates (B)</p> Signup and view all the answers

<p>Zone of remineralization (A)</p> Signup and view all the answers

<p>Demineralization can lead to the development of caries (D)</p> Signup and view all the answers

<p>Bacterial invasion of dentinal tubules (C)</p> Signup and view all the answers

<p>Secretion of antimicrobial peptides (D)</p> Signup and view all the answers

<p>A lateral spread of caries under the enamel (A)</p> Signup and view all the answers

<p>ICDAS Code 5 (B)</p> Signup and view all the answers

<p>Grey shadowing under the enamel (A)</p> Signup and view all the answers

<p>Presence of a 'mushroom' shape (C)</p> Signup and view all the answers

<p>It could displace infected dentine layers (D)</p> Signup and view all the answers

<p>Code 5 (B)</p> Signup and view all the answers

<p>Hydroxyapatite (D)</p> Signup and view all the answers

<p>They provide a pathway for bacterial invasion and contribute to the progression of caries. (A)</p> Signup and view all the answers

<p>A dark shadow from dentine with or without enamel breakdown (C)</p> Signup and view all the answers

<p>To address inconsistencies in caries diagnosis and facilitate research and clinical practice. (D)</p> Signup and view all the answers

<p>It is dark brown, soft, and mushy. (C)</p> Signup and view all the answers

<p>It contains intact dentinal tubules. (C)</p> Signup and view all the answers

<p>It involves decalcification of dentine. (A), It shows signs of bacterial penetration. (C)</p> Signup and view all the answers

<p>Soft and yellow texture. (C)</p> Signup and view all the answers

<p>It cannot form a proper seal. (A)</p> Signup and view all the answers

<p>It is high, contributing to decay. (A)</p> Signup and view all the answers

<p>It shows a gradual reduction in mineral content. (C)</p> Signup and view all the answers

<p>Zone of destruction. (C)</p> Signup and view all the answers

The study of causes leading to dental caries development.

The process where minerals are lost from tooth structure due to low pH.

The main mineral component of tooth enamel and dentine.

The layers affected by caries in dentine: outer, bacterial, decomposed, and sclerotic zones.

A lower pH leads to tooth demineralization and can cause caries formation.

The International Caries Detection and Assessment System for diagnosing caries stages.

Caries showing dark shadows from dentine and/or enamel breakdown, with wet white or brown spots.

A cavity in opaque enamel with visible dentine, showing demineralisation on the walls.

An extensive cavity where dentine is visibly extended.

Dentine is made of hydroxyapatite mineral and collagen; it contains odontoblasts for defense.

Represents macroscopic dentine caries with grey shadowing and crown integrity breakdown.

Caries spreads horizontally beneath the enamel due to substrate hardness change.

Indicates advanced caries where dentine is exposed and extensive cavities develop.

Bacterial activity softens dentine, creating areas that can be excavated.

Caries manifests as a 'mushroom' shape, contrasting with enamel caries.

The outermost area of dental caries that is irreparably damaged, appearing dark brown and mushy.

Round areas of liquefaction within dentinal tubules caused by high bacterial loads in caries infected dentine.

Cracks formed at 90° to dentinal tubules due to destruction from caries.

A zone where bacteria invade dentinal tubules without causing liquefaction, still allowing some structure to exist.

The process by which bacteria dissolve proteins within dentine during caries progression.

Dentine that is invaded by bacteria and shows signs of demineralization, but may not always need removal.

The principle that some zones of dentine may not require removal if dentinal tubule structure remains intact.

A region of tissue that has died due to the effects of caries, marked by soft and mushy texture.

Area where acid demineralises dentine; no bacteria present.

Zone of caries affected dentine; may feel softer and is pale brown.

Initially affected area where odontoblasts calcify tubules to protect pulp.

Zone shows as a whiter area radiographically due to hyper-mineralisation.

New dentine laid down at pulp-dentine border for protection from acids.

Type of tertiary dentine formed from mild irritants by surviving odontoblasts.

Dentine formed from strong irritants causing local cell death in odontoblasts.

Odontoblasts lay down dentine in response to irritation, protecting the pulp.