Figure 6. BSE images showing incremental markings in inner (a) and central (b) lingual enamel.

a. White arrows indicate the course of three laminations visible in interprismatic enamel (IP). Between two successive laminations, five sub-daily increments (asterisks) separated by four darker lines are discernible. Arrowheads mark sub-daily increments in an enamel prism (P). Black arrow indicates overall prism direction. Note occurrence of clefts (crosses) in interprismatic enamel. Cuspal to top. b. Presence of sub-daily incremental markings (arrowheads) in longitudinally sectioned prisms (P) of central enamel. Cuspal to top.