Objective:This article will discuss some of the most commonly used indices in orthodontics Materials and Methods: A comprehensive literature from orthodontic relevant sources and information was searched with the help of Pubmed, Medline, Google scholar, Scopus using keyword like orthodontic indices. Result:It had been widely agreed that no particular index or method available that are truly inclusive of all recommended criteria. Therefore, different indices or method had been developed according to different requirements.Conclusion:The use of indices in orthodontics allows more uniform interpretation and application for criteria for treatment need and changes. Still there is a need of a development of index which can be universally accepted in terms of reliability and validity.