[Stress analyses and comparison of the Kennedy III dentition defect restored with removable partial denture].

Purpose: To investigate the stress distribution of the abutment and oral mucosa in Kennedy III, restored with removable partial dentures, either unilateral or bilateral designed.

Methods: Five FEA models were established for the partial edentulous and RPDs, which were divided into group A and group B. According to the denture design, bilateral (B) or unilateral (A) designed.

[Effect of stress distribution of support tissues using hinge extracoronal attachment prostheses].

Purpose: The purpose is to discuss the clinical indications of hinge extracoronal attachment.

Methods: In the experiment, the stress distribution in the periodontal support tissue of the abutment was analyzed under different numbers of abutments by EFA.

Results: There was no significant effect on the stress distribution in the supporting tissue according to the different numbers of abutments at the central occlusion, and there was an evenly stress distribution in the abutment and alveolar membrane of the area around the missing teeth.

[The establishment of 3D-FE model libraries for the elements of FPD].

Purpose: To establish the 3D-FE model libraries for the elements of the FPD.

Methods: Based on the 3-D geometric model libraries of the normal stomatognathic system, using the software, such as Powershape,Pro/E and Ansys5.5, the models of abutments,retainers and pontics were created according to the models of natural crowns.

[The establishment of 3D-FE model libraries for the elements of the RPD].

Purpose: To establish the 3D-FE model libraries for the elements of the RPD.

Methods: Based on the 3D geometric model libraries of the RPD and normal stomatognathic system, using the software, such as Powershape,Pro/E and Ansys5.5, transformed data, trimmed models, or rebuilt it, established many kinds of FE model elements, then combine these elements in the whole model, connected and trimmed, at last created several kinds of FE model libraries.

[The establishment of the individual model libraries for stomatognathic system].

Purpose: To investigate the method of establishing the individual model libraries for stomatognathic system.

Methods: Based on the normal 3D FE models, including the upper jaw, lower jaw and whole dentitions, with the help of the ANSYS5.5, divided, trimmed or re-built these models, created the abnormal stomatognathic system.