The development of Angle 's classification of malocclusion in the 1890s was an important step in the development of orthodontics .
Step not only subdivided major types of malocclusion but also included the first clear and simple definition of normal occlusion in the natural dentition .
The development of Angle 's classification of malocclusion in the 1890s was an important step in the development of orthodontics because it not only subdivided major types of malocclusion but also included the first clear and simple definition of normal occlusion in the natural dentition .