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the pulp responds as soon as the lesion enters the dentin secondary dentin forms beneath affected tubules

oral

ground

cavity

section

dentin caries

lesion

pulp

clinical cavity

X13

secondary dentin

dead tracts

decomposed dentin note peeling surface

Pit & Fissure Caries

stained material in fissure lumen must be differentiated from dental caries

ground section

advanced caries lesion

bacteria penetrated full thickness of dentin & into tubules of secondary dentin

enamel

dentin

X90

plaque

fissure

stained ssures

primary dentin

secondary (reparative) dentin

9

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