This was proposed in 1982 by Commission on Oral Health, Research and Epidemiology arising from a lack of a well-defined and internationally accepted classification of enamel defects.The index was designed to promote use of standard terminology, simplicity and to provide an effective system for recording enamel defects in large studies.The first version was, however complicated and difficult to analyze thus, Clarkson and O’Mullane suggested a modified and simplified version of the index that has now been widely adopted (Federation Dentaire Internationale,)