According to location

  • Pit and fissure caries
  • Smooth surface caries
  • Root surface caries

According to extent or severity

  • Incipient (reversible)
  • Cavitated (non reversible)

Based on whether new or old

  • Initial or primary caries
  • Recurrent or secondary caries

According to rate of progression (speed)

  • Acute or rampant
  • Chronic caries
  • Arrested caries

According to Pathway of caries

  • Forward caries
  • Backward caries

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