Table 2.

Classification of dental fluorosis by Dean’s index.

The Degree of Fluorosis on a Numerical Scale	The Degree of Fluorosis	Clinical Features
1	Normal	Flawless, glittering surface with various shades of white, ecru, cream
2	Questionable	It differs from the normal degree, with the presence of single white spots or fleck changes
3	Very Mild	Minor, intensely white regions with a lack of transparency on up to 25% of the surface, with no brown spots
4	Mild	The changes are similar to a lower degree, but cover up to 50% of the area
5	Moderate	There are already brown spots and the lesions cover most of the tooth surface, but the shape of the tooth usually does not change
6	Moderately Severe	Cavities are more frequent, and they are also deeper and more extensive
7	Severe	Visible hypoplasia in the form of comprehensive lesions and a color from brown to even black