Proper chewing and eating, Providing space for the permanent teeth and guiding them into the correct position; when a baby tooth is lost too early, the permanent teeth can drift into the empty space and make it difficult for other adult teeth to find room when they come in. This can make teeth crooked or crowded. That’s why starting infants off with good oral care can help protect their teeth for decades to come. The ADA recommends that parents take children to a dentist no later than their first birthday and then at intervals recommended by their dentist. Permitting normal development of the jaw bones and muscles, Primary teeth also affect the development of speech and Pronunciation and add to an attractive appearance. Decayed or abscessed primary teeth act as foci of infection, which can spread harmful bacteria to various parts of body, particularly the tonsils, adenoid and the heart