In what situations is regenerative endodontic therapy considered, and what are the core criteria for immature teeth?

• A. For necrotic pulp in immature teeth to promote continued root development; criteria include an open apex, absence of severe infection, and a suitable apical barrier environment
• B. For healthy pulp in mature teeth
• C. Only for cosmetic reasons
• D. For any tooth with a root fracture

Answer: (A)