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www.reference.com/article/causes-teeth-turn-gray-3f0cabd29d65140a

Teeth usually turn gray as a result of trauma or exposure to the antibiotic tetracycline before the age of six, according to Rocky Mountain Endodontics. In the case of trauma, the gray appearance is due to the tooth being dead or the nerve being irritated and in the process of dying. Tooth death oft

www.reference.com/article/causes-gray-hair-turn-yellow-82eb373c4beea98f

Yellow-tinted shampoo and conditioner, chlorine, chemicals in water, and excess sunlight exposure can cause gray hair to turn yellow, according to Oprah. Gray hair has very little pigment and easily picks up the pigment from things in the environment.

www.reference.com/world-view/causes-gray-hair-7de85b4c1e619af3

There are many different reasons why hair turns gray, but the primary cause is genetics. Each of the hair follicles, where hair is produced, contains cells called melanocytes. These melanocytes produce the melanin needed to color hair; they gradually die in time so that hair will receive less melani

www.reference.com/article/causes-teeth-turning-black-8211b532bd338fb3

The causes of blackening teeth include consuming certain drinks, such as coffee, cola and wine, as well as certain fruits and vegetables, such as apples and potatoes. Poor dental hygiene, diseases that affect the enamel, head and neck radiation, and some medications, such as tetracycline and doxycyc

www.reference.com/article/individual-tooth-turn-gray-9a9b8fad8ee4ddbe

Gray teeth usually occur due to several reasons, including certain medications, motion and metal. Such teeth are usually characterized by dark pigmented molecules in the enamel and dentin of the teeth, as stated by ToothIQ. It is always sensible to talk to a dentist to figure out the underlying caus

www.reference.com/article/causes-gray-hair-children-8a976167bfb3a895

According to CNN Health contributor Dr. Jennifer Shu, the development of gray hair in children is usually genetic, but it is also caused by a nutrient deficiency or a skin disorder. Dr. Shu also notes that if a child's general health is normal, early graying is not a cause for concern.

www.reference.com/world-view/teeth-turn-black-da3c908b97637647

Tooth decay and dead teeth are the most common reasons why a tooth might turn black. Other reasons may include the consumption of certain foods and drinks, tobacco use, poor dental hygiene, taking certain medications and various diseases.

www.reference.com/world-view/cause-gray-gums-be4ea51460688914

There are two main causes for gums to turn gray, including trench mouth and leukoplakia. When people have trench mouth, they develop a gray film on their gums and may experience a bad taste in their mouths. Leukoplakia is a condition that causes white or gray patches on the gums, tongue and inner ch

www.reference.com/world-view/causes-black-teeth-d6609627e3438b2

Some of the causes of black teeth are foods and drinks, tobacco use, poor dental hygiene, diseases, medications and dental materials, according to MedicineNet. Genetics and excessive fluoride use are also possible factors.

www.reference.com/article/causes-small-teeth-79ee669a8297c23b

According to the Genetics Home Reference, a website of the U. S. government that seeks to promote education about genetic disorders, small teeth are caused by many different conditions, such as amelogenesis imperfecta, Down syndrome, Larsen syndrome, polydactyly and Coffin-Lowry syndrome. There are