Tomes' process is active during which phase of amelogenesis, and what is its function?

Correct answer: A. Secretory phase — forms enamel prisms (rods) and interprismatic enamel

• A. Correct. Tomes' process is a projection of the ameloblast active during the secretory phase, responsible for forming the enamel prisms (rods) and interprismatic enamel substance.
• B. The maturation phase involves removal of the organic matrix and increased mineralization, but Tomes' process is NOT active and no further prism formation occurs during this phase.
• C. Tomes' process is specifically a secretory-phase structure, not active throughout maturation.
• D. The bell stage is an earlier morphogenetic stage of tooth development, distinct from the amelogenesis (enamel formation) process itself.

Note: Maturation phase: removal of organic matrix, increased mineralization, no prism formation, Tomes' process NOT active.