PHYSICAL AND MATHEMATICAL GROUNDS LANDFORMS BASIS PLATE DENTURES WHEN APPLYING THE COMPLEX METHOD OF PREVENTION OF PROSTHETIC STOMATITIS

Abstract

The Objective of the study is a development of the drug form reservoirs to hold the basis of vegetable oils for the prosthesis without impairing its strength characteristics. Materialand Methods: The research was conducted on the Bench PMMA samples. The comparison group consisted of smooth plate PMMA. Two study groups were PMMA plates with grooves on one side of a square with sides of 2 mm and depth of channel -1 mm. The third group consisted of the experimental plate with diamond-shaped notches with the same parameters. Different geometries of the relief surface of various displacements and stresses, depending on the load. Large voltage at the plate with a smooth surface is explained by high residual stresses due to the nature of the process. When applying the relief gratings redistribution of residual stresses. It is known from the mechanics of deformed solid body that the surface energy of deformation decreases in the presence of cracks or recesses. This explains lower equivalent stresses in plates with raised bars. Results: When comparing the strength characteristics of the plates with relief grids smaller equivalent stresses in the plate with the rhombic lattice. This is known dependency theory of elasticity and the elements of the theory of stress-strain state. At this point the voltage does not depend only on the external load, but also on the position of the plane passing through point. Accordingly rhombic relief is an element of rigidity in the surface of the plate as opposed to a square lattice, where the relief recess mutually perpendicular and does not have effect on the distribution of principal stresses, such relief does not alter the position of the main sites. Study results show that the stiffness and strength conditions are satisfied for the calculated models. The lowest values of voltages arise in the plate with a rhombic grid, 54% are less than in the smooth plate and 37% less than the plate with a square lattice (best strength properties in a rhombic lattice plate).Equivalent move from the plate with a rhombic lattice is less than an order of magnitude than that of a smooth plate and by 5.8% more than at the plate with a square lattice, which indicates good performance design plasticity with rhombic grid. Conclusion: As a result, settlement schemes plate designs, it can be concluded that the proposed version of the plates with the rhombic grid has the best qualities of the parameters of strength in the trials, and set research goals.

Keywords

• PMMA, strength, ductility, prosthetic stomatitis.