what healthy lay the foundation for healthy permanent teeth 1.) cheeks 2.) Milk teeth 3.) Smiles The correct answer is OPTION 2: Milk teeth. Between the ages of 3 and 4 months, primary teeth appear, and between the ages of 6 and 12 months, they burst through the gums. The type of teeth that emerge depends on the child's age, but by the age of three, all 20 primary teeth will have emerged. Baby teeth are vitally important whether they fall out or are replaced by permanent teeth. Aid children in correctly chewing and crushing their food. Make room for permanent teeth and guide their development. Assist the jaw bone and muscles in growing properly. Set the stage for a lifetime of happy, healthy smiles .