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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The theory of fringe formation in holographic interferometryhas been shown in other studies 14, Introduction Several fields of Dentistry, such as Prosthodontics, Endodontics, Orthodontics, Periodontists and other, have employed various techniques to evaluate stresses distribution, including photoelasticity, mechanical models, finite element interferomtria and strain gauge systems A difference in the direction of stress transmission was also observed.
Strength of biological materials.
One drawback in the use of load cells is that they are activated according to deformation in the surface which they are attached to. Verh K Acad Geneeskd Belg ; Govaert L, Dermaut L. Additionally, another factor that may have aided tension dissipation is the hardness of the bone.
Yamada 17 stated that the hardness of dry compact bone is 1. Effects of headgear traction on the facial skeleton of the monkey: The mandibles of 6 dogs Canis familiars aged approximately 4 years and weighing 12 kg were used.
In all hemi-mandibles, the fringes were more compact in the region closest to the point of force application and spacing between fringes increased steadily along the length of the mandible, towards the fixed extremity.
Shchepinov V, Pisarev VS. The hemi-mandible was subjected to a g static load.
After sedation and euthanasia of the animals, the mandibles were surgically removed and all the surrounding soft tissues skin, mucosa, ligaments, muscles and gingival tissue were removed. The use of macerated skull as an experimental model in holography has, however, been questioned recently. Furthermore, the method of attachment of this device to the surface of the object under study may also influence its performance. These images show that the tensions created in the area of application of force are more intense and that these tensions are dissipated and absorbed as they are transmitted along the mandibular bone.
The following devices were set upon the holographic table: How to cite this article. Adachi I ; Jose E. The holographic images showed that: Dermault LR, Beerden L. Services on Demand Journal. Fresh hemi-mandibles were thus seen to transmit less tension than the corresponding fixed and macerated samples.
Holographic interferometry method for assessment of static load stress distribution in dog mandible
The specimens were submitted to the same initial force and their respective holograms were obtained. The influence of the periodontal ligament was clear in the present study, as it was observed a marked alteration in the direction of fringes located in the tooth and in the bone of the fresh hemi-mandibles.
Finite elements study of the FlexiPost and FlexiFlange post system in a maxillary central incisor. Qualitative analysis of stress distribution in tooth-implant and implant-supported prosthesis by means of holographic interferometry method.
It is also known that the force is directly proportional to the displacement Hooke’s lawi.
Meaning of “interferometria” in the Portuguese dictionary
The film was developed and fixed. In a previous study 10moisture in fresh dog skulls may have influenced their results interefrometria comparison to macerated skulls, by making them less rigid and leading to a less pronounced displacement of bone. Campos I ; Lena K. Resolution holorafica that of the order of the laser wavelength or that of a photographic film 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 Braz Dent J ; Several fields of Dentistry, such as Prosthodontics, Endodontics, Orthodontics, Periodontists and other, have employed various techniques to evaluate stresses distribution, including photoelasticity, mechanical models, finite element analysis and strain gauge systems Em seguida, foram randomizadas em 2 grupos: The findings of inteerferometria investigation suggest that the use of dry specimens in research and the inference of their results for an in vivo situation must be conservative.
INTERFEROMETRIA – Definition and synonyms of interferometria in the Portuguese dictionary
Several load cells would be necessary to produce an overall mapping of the distribution of tensions. The mandibular ramus was fixed in a metal box by screws and self-polymerizing acrylic resin was poured into the box. Holography follows a different principle from conventional photography. A laser is needed to produce a coherent, monochromatic light beam.
Calcif Tissue Int hokografica Med Eng Phys ; The macerated hemi-mandibles presented more fringes, with smaller spaces between them; 2 A change in the direction of fringes in the tooth and bone was recorded in the fresh hemi-mandibles. Qualitative evaluation is achieved by observing the aspect and direction of the fringes 8.
Am J Orthod ; Effect of different prosthetic restorative materials on occlusal load distribution. However, depending on the type of analysis, the anatomical specimens must be fresh because macerated specimens will produce different results. The laser was emitted continually by a direct current power supply. Double-exposure holographic interferometry was applied and holograms were obtained from 12 fresh hemi-mandibles under static load control groupwhich were randomly assigned to 2 groups: