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  • Translucent zone:

advancing lesion front, large pores

  • Dark zone: small &

large pores, small pores may be remineralizing large pores

  • Body of the lesion:

enough mineral loss to be visible radiographically

  • Intact surface zone: F

catalyzed precipitation of Ca & PO4 from subsurface dissolution & saliva

visible on PBWs as E1 lesion

intact surface body of lesion

dark zone translucent zone

ground section

incipient caries lesion

X22

Cone shape demonstrates inuence of enamel rod direction

inter- globular dentin

primary dentin

ground section

translucent zone

incipient caries lesion

dark zone

incremental growth lines striae of Retzius

X36

A

E1 lesion conned to outer half of enamel

slowly progressing lesions go through more demin/remin cycles leading to dark shallow lesions

rapidly progressing lesions go through fewer demin/remin cycles leading to lighter-colored, more aggressive lesions

4

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