Study On Expert System Of Removed Partial Dentures CAD

Expert system is an intelligent deductive system on the basis of the knowledge library. Along with the using of computer technology and the quickly development of AI, expert system of Removed Partial Dentures(RPD) adopt mix module of knowledge-base and data-base to obtain knowledge. The system adopt programming language VB to carry out the big function of Windows programming and express the potential ability in knowledge acquisition, so as to provide a convenient interface for users and make it match to knowledge expressed in traditional expert system.The expert system of removed partial dentures CAD may divide into two parts of the patient information management and the partial artificial denture repairs. This paper mainly introduces the system structure, knowledge acquisition, inference mechanism and implementation of each module.Using the software of PhotoShop6.0 to make the pictures of RPD. A 2-D model library of component parts of RPD was set up. The 2-D model library was retained a port for adding and expanding. After collecting lots of cases of RPD and experience of experts, we summary some principles. Then, on the basis of these principles, we compiled the corresponding relations between the diagnosis of dentition defect and denture designing, which would guide selecting component parts of RPD from the 2-D model library according to dentition defect condition. After using the computer language(VB) to compile these relations, the knowledge library of RPD designing was established.Referring to the structure of clinic medical history and the 2-D model library and the knowledge library, we utilized the VisualBasic6.0 to create an easy operating visual manipulating panel of man-machine dialogue with plentiful content. With the help of this database, the computer could deduce logically and select denture picture from the model library after the information of patients was input.Using the software of Pro/ E with the method of model conversion to complete the three dimensional graph of partial artificial dentures parts, the parts can be built into RPD. Then, the models are entered into MSC.Patron to do the pre-treatment of FEA. The models can simulate the natural condition and facilitate the further bio-mechanical research.