Fluorosis: A chronic condition caused by excessive intake of fluorine compounds
This comes under the sector of mottling of the teeth to calcification of the ligaments.
It is a condition in which your body has been exposed to too much fluoride. In normal doses fluoride is a healthy compound that promotes strong teeth, which has the ability to fight cavities and other problems.
Basically fluorosis occurs when fluoride containing toothpastes or rinses are swallowed, instead of expelled.
Fluorosis causes a number of aesthetic problems, including abnormally darkened or stained teeth. While such problems are generally harmless to your health, they can create concerns with your appearance. Taking care is the best way to avoid all unnecessary problems.