CARIES LESIONS

CARIES LESIONS

1. TRANSLUCENT ZONE

   • 1ST carious change Loss of 1-2% mineral
     • Few large pores due to loss of Prism periphery

2. SURFACE ZONE

   • Relatively intact
     • highly mineralised high fluoride
       • forms and reforms during carious process
       • redisposition of mineral dissolved from deeper layer

3. BODY OF LESION

   • Largest part and centre of lesion
     • 25-50% porosity
       • enamel is relatively translucent

4. DARK ZONE

   • Seen in 90-95% of lesions
     • Porosity 5-10%
       • consists of large and small pores
         • demineralisation and remineralisation occuring