Finite element analysis of acrylic denture produced from visible light custom tray

الملخص EN

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

Material and Method: Visible light custom tray (spaced and close fit) 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 Excel 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 of vertical load of 100 Newton applied on the buccal cup (supporting cusp) of the second premolar tooth.

Result: After the data was analyzed, the results were drawn in figures using surfer 7 program.

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.

Conclusion: 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 begin¬ning of the cortical bone and along the buccal vestibule.

The less stress concentration, deflection and less value of shear and maximum principle stress that distributed over large distance was found by us¬ing visible light cure spaced custom tray.

Key words: finite element, alveolar bone, custom tray, visible light cure.