Interferometria Holografica Digital – Download as PDF File .pdf), Text File .txt) or read online. Esta basado en el estudio sobre la Interferometria Holografica. Gesualdi, M.R.R. () Técnicas de Interferometria Holográfica Usando Cristais Fotorrefrativos da Família das Silenitas Universidade de São Paulo, Instituto. Meaning of interferometria in the Portuguese dictionary with examples of use. Synonyms Técnicas de interferometria holográfica usando cristais O objetivo .
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Quantification of holographic fringe data: Services on Demand Journal. Additionally, another factor that holigrafica have aided tension dissipation is the hardness of the bone. Verh K Acad Geneeskd Belg ; When developed and suitably exposed to laser light, this hologram reconstructs a three-dimensional image of the object. The hemi-mandibles were placed in such a way that load incidence would be at the incisal edge of the canine, simulating occlusion with the opposing tooth.
In fact, stress transmission in the hologrsfica conditions was twice as large as in the control group. Because it is a non-destructive method, whose results can be obtained from the very object under study, it enables repeatability of the experiment. Two-dimensional photoelastic stress analysis of traumatized incisor.
Several load cells would be necessary to produce an overall mapping of the distribution of tensions. In order to have a more accurate model, the use of natural anatomic specimens is recommended.
Holographic interferometry has been used to evaluate stress in extracted teeth 4metallic and ceramic crowns 5,6dental implants 7removable dentures 8 and craniofacial displacements caused by external force in orthodontic application Therefore, tensions transmitted were more intense than in fresh samples, corroborating the results of Clerk et al. J Osaka Dent Univ ; Campos I ; Lena K. Stress analysis of fresh and macerated dog mandibles.
The experiment was carried out in a totally dark, draft-free environment.
Figures 45 interferomdtria 6 show images of specimens of fixed right hemi-mandible, fresh left hemi-mandible and macerated left hemi-mandible, respectively. The following equations 16using data of Figure 3were used for quantitative measurement of displacement.
This set was fastened to the device by means of a clip-together system enabling the correct repositioning during the experiment Fig. Holofrafica analogy, if a rigid bar is used to make a lever, a given result will be obtained at the opposite end; if the same load is applied to a less rigid bar with the same dimensions, there will be a lower-intensity result at the opposite end. Data relative to the comparison between fresh and fixed specimens as well to the comparison between fresh and macerated specimens are presented on Tables 1 and 2respectively.
The reconstructed image of the hologram contains most of hlografica information of the object. All the contents of this journal, except where otherwise interferojetria, is licensed under a Creative Commons Attribution License. The film was developed and fixed. Resolution is that of the order of the laser wavelength or that of a photographic film Effect of different prosthetic restorative materials on occlusal load distribution. Holographic evaluation of the marginal fits of complete crowns loaded at the central fossa.
Furthermore, the method of attachment of this device to the surface of the object under intefrerometria may also influence its performance. This method allows the detection of minute movements of the order of nanometers, as well as overall qualitative and quantitative visualization of the trajectory of the tensions generated upon load application.
The hemi-mandible was subjected to a g static load. One drawback in the use of load cells is that they are activated according to deformation in the surface which they are attached to.
Given that the process of maceration leads to bone drying and loss of fibrous connective tissue, a question remains as to whether the results obtained with macerated skulls could be transferred to the in vivo situation. Several fields of Dentistry, such as Prosthodontics, Endodontics, Orthodontics, Periodontists interferometrria other, have employed various techniques to hoografica stresses distribution, including photoelasticity, mechanical models, finite element analysis and strain gauge systems In a previous study 10moisture in fresh dog skulls may interferomertia influenced their results in comparison to macerated skulls, by making them less rigid and leading to a less pronounced displacement of bone.
Govaert L, Dermaut L.
Holographic interferometric double exposition method. Med Eng Phys ; Because the holographic method is highly sensitive to small bone displacements and deformations, and given the controversy among researchers as to the use of macerated skulls, and the difficulty of obtaining fresh post-mortem human skulls, the purpose of this study was to compare the distribution of tensions produced under static load in fresh controlmacerated and fixed hologrwfica mandibles.
The reflected beam reference beam interacted with the object beam to produce a hologram on the film. Yamada 17 stated that the hardness of dry compact bone is holografca.