White spot lesions: (see white spot lesion section)
(A) Active lesions have  a porous surface which clinically appears chalky and with the explorer feels rough. 
      -The root/dentin lesion is not a white spot lesion  and when active is soft or leathery and discolored.
(NA) Nonactive lesions have a relatively non-porous  surface that is smooth, shinny and hard (2).

It is suggested that the intraoral camera be used to capture and store the graphics of these lesions for future comparisons.

Classify cavitated lesions appearance and texture when feasible:  (see cavitated lesion section)
(A) Caries active lesions: grayish, moist, soft.  
(NA) Nonactive lesions: Dark, dry, hard.

Lesions on x-rays.  Evaluate depth of penetration: (see x-ray evaluation)

**Cavitated lesions only

Completion of this chart will give you a good indicator of  caries activity.  If patient has mostly inactive caries areas but has active site also, classify patient as caries active and treat to control the caries activity before progressing with restorations. 

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