In this book I have explained in detail about the each and every indices use in Orthodontics. A.L. Russell, an index is defined as 'A numerical value describing the relative status of the population on a graduated scale with definite upper and lower limits which is designed to permit and facilitate comparison with other population classified with the same criteria and method. In this book I have descried various indices which are useful in dividing the severity of malocclusion among population which it needs to be studied. The evaluation of malocclusion is the essential component in...