41. "I've got permanent teeth damage that I'm going to have to live with the rest of my life. 42. Yet sealants, which should be applied as soon as the permanent teeth start coming in, are still underused. 43. The deciduous teeth appear at about three weeks, with the permanent teeth following at seven to nine weeks. 44. Permanent teeth are numbered 1 to 8, and primary teeth are indicated by a letter A to E.45. Underneath the primary teeth, hidden in the gums, are the buds that will grow into the permanent teeth . 46. Younger horses may seem to have a lumpy jaw, due to the presence of permanent teeth within the jaw. 47. Retained teeth can cause tooth decay because food can be easily caught in between the deciduous and permanent teeth . 48. Over-retained teeth can cause your child's permanent teeth to be in every other place except where they should be. 49. The young are weaned at about one month of age, by which time all their permanent teeth have erupted. 50. There are 32 permanent teeth and those of the maxillae erupt in a different order from permanent mandibular teeth.
