Australian Dental Council (ADC) Practice Test 2026 - Free ADC Practice Questions and Study Guide

Post-eruptive uptake of fluoride in enamel is significantly influenced by the conditions of surface demineralization and hypomineralization. Surface demineralization refers to the process where minerals are lost from the enamel surface due to acid attacks, often associated with plaque and dietary acids. This demineralized surface is more porous and can absorb fluoride more readily.

Hypomineralization refers to enamel that has less mineral content than normal, leading to defects in the enamel structure, making it less dense. This condition allows for greater uptake of fluoride because the decreased mineral density creates more pathways for fluoride ions to penetrate and interact with the enamel.

Together, these two conditions enhance the ability of fluoride to penetrate the enamel, thus improving remineralization and enhancing the enamel’s resistance to caries. This is why post-eruptive uptake of fluoride is facilitated under these circumstances.