Since the description of dental fluorosis as a disease entity by Fredrick McKay and GV Black in 1916, several indices have been used to categorize the different forms of dental fluorosis. Such indices include Dean's, Thylstrup and Fejerskov's(T-F), Total Surface Index of Fluorosis(TSIF) etc. However, none of these indices that was introduced in the 20 th century is without shortcomings or limitations, which eventually led to the discovery of newer indices with continuous scale such as the Visual Analogue scale, Quantitative Light Fluorescence and Polarized white lightimages .

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