Which zone exhibits the greatest degree of demineralization in enamel caries:____________?
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Answer: B. Body of lession
Explanation
The body of the lesion in an enamel carious white spot exhibits the greatest degree of demineralization. Subsurface mineral loss creates maximum porosity within this central zone of the carious lesion. Preservation of a relatively intact surface zone overlies this deeply demineralized body of the lesion. Early enamel caries develops as a subsurface lesion due to organic acids diffusing through micro-channels. Histologically, an enamel carious lesion is divided into four distinct zones from inside to outside. The translucent zone and dark zone represent advancing fronts of initial mineral dissolution and remineralization.
Understanding enamel histology helps preventive dentists apply remineralization therapies to reverse early carious white spots. Fluoride treatments encourage mineral precipitation into the body of the lesion to restore structural integrity. Preventing cavitation relies on halting the demineralization process before the surface zone collapses completely. The translucent zone represents the deepest advancing front of the lesion with minimal mineral loss. The dark zone exhibits active remineralization phenomena, making it less demineralized than the body. The surface zone remains relatively well-mineralized due to mineral precipitation from saliva and fluoride sources.
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