Below is an excerpt from an article found on Colgate.com that was written by Katriena Knights Enamel is the hardest substance in the human body, and is therefore vital to the health of your teeth. Not everyone's is the strongest, though, and still others have teeth without enamel at all. Without enamel to protect the softer interior parts of your teeth, they can't stand up to the stress of natural biting and chewing. These abnormal developments require special care and treatment. Enamel Hypoplasia Teeth can come in without enamel as a result of inherited issues or because of exposure to certain substances while the teeth are erupting. Baby teeth and permanent teeth can both emerge with enamel that is weak, improperly formed or missing altogether. One of these conditions is enamel hypoplasia, which literally means "underdeveloped enamel." A disorder that causes the teeth to develop with thin, deficient enamel, it sometimes manifests as a pit in the tooth ñ or eve...