When a caries lesion affects the enamel, a “white spot” (the enamel presents a matt white spot, usually of a round or oval shape) is usually observed at the site at which demineralization has taken place due to the action of the acid generated by the bacteria.
In the case of caries affecting the dentin, four zones are observed histologically, from internal to external:
1] necrotic
2] infected
3] demineralized
4] Remineralized.
Remineralized zone is not always present.
When the roots are exposed to the oral environment, cementum caries can develop; these are initially visible as translucent stains that cause a rapid loss of dental tissue.
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In the case of caries affecting the dentin Thank Admin