Introduction of a new orthodontic treatment planning software; a fuzzy logic expert system.

General practitioners can learn the mechanical aspects of orthodontics quickly. But they are not usually sure about the treament plans they propose. In this article, new software is described that proposes treatment plans fornon-surgical orthodontic cases. This computer program can receive patients' data in both graphical and numerical forms. The concepts of fuzzy logic have been used to enable the software to work with nominal parameters. This feature greatly simplifies the use of the software because it does not force the user to measure several numerical variables. Each patients' data is saved by this software and the saved data can be modified or deleted later. The computer program is prepared to deal with special cases such as incomplete dentitions appropriately. The software is supposed to reduce the number of inappropriate extractions and erroneous treatment plans for orthodontic purposes.