Finite element analysis of acrylic den-ture produced from mental stock tray

الملخص EN

-Aims: To determine stress analysis exerted by denture on the edentulous alveolar bone in the premolar region represented by stone cast produced from metal stock tray using linear finite element method.

Materials and methods: Metal perforated stock tray was used to produce stone cast that represent the denture base and the underlying bone using silicone impression material.

The dimension of the cross section of the stone cast was measured using Dimax program, then the data collected was entering Ex¬cel program for making the figures.

The dimension of the cross section of the stone cast entering finite element program and other new auxiliary program prepared specially for this study for finite element analysis.

Results: After the data was analyzed, the results were drawn in figures using surfer 7 pro¬gram.

High compressive, tensile, deflection, shear and maximum principal stress values were observed below the point of force application and in the underlying structure with different values and locations according to the analysis in the mucous membrane and in the underlying bone in the X and Y axes.

Conclusions: By using finite element analysis, the more stress concentration and deflection were found below the point of force application, in the mucous membrane, at the beginning of the cortical bone and along the buccal vestibule.

Key Words: Finite element, Alveolar bone, Stock tray.