According to the British Dental Association, there are deciduous molars, all of which eventually fall out by around age 12, and permanent molars, which do not necessarily fall out. All the deciduous molars appear by the time a child is around 2 1/2 years old.
Mascara: Get yourself a pre-wash stain fighter like Shout and apply to the stain using the brush that comes with the pre-wash. Let it sit for about 10-15 minutes, then rinse with hot water. Launder the garment immediately either by hand or in the machine (whichever is most convenient for you).
Tobacco, whether it's smoked or chewed, is another possible cause of this type of staining. Because these stains are on the outer layer of your teeth â unlike intrinsic â you can usually remove them with whitening toothpastes like Colgate TotalÂ® Advanced Whitening. These work by gently brushing the surface of your enamel, which allows them to lift stains gradually as you scrub them.