Biodentine and MTA are used in MID because they:

• A. Release minerals, promote dentin-pulp healing, and help seal the dentin-pulp complex.
• B. Are inert fillers.
• C. Dissolve over time.
• D. Are the same as conventional GIC.

Answer: (A)

Biodentine and MTA work in minimally invasive dentistry because they are bioactive materials that interact with pulp tissue to promote healing and create a durable seal. They release minerals, especially calcium ions, which stimulate odontoblast-like cells to form reparative dentin and help form a mineralized barrier at the dentin–pulp interface. This hydroxyapatite-rich layer seals the cavity and protects the pulp from microleakage and bacteria, supporting pulp vitality and long-term tooth integrity. They are not inert fillers, they don’t porously dissolve over time to lose seal, and they are not the same as conventional GIC, which lacks the same bioactive dentin-pulp healing potential.