Mastication effort study using photorefractive holographic interferometry technique

Caroena, Glaura; Mori, Matsuyoshi; Gesualdi, Marcos R. R.; Liberti, Édson Aparecido; Ferrara, E.; Muramatsu, Mikiya

doi:10.1016/j.jbiomech.2009.10.025

Cited by 15 publications

(7 citation statements)

References 22 publications

(23 reference statements)

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“…Subsequently, materials that dispensed the chemical processing emerged: the photorefractive crystals, which are used as recording medium in Photorefractive Holography [6,7]. This technique has been broadly applied in surface contouring and in phase-shifting real time interferometry [8,9,10,11,12,13,14], as well as in microscopy [15,16].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Digital Holography for recording and reconstruction of 3D images using optoelectronic devices

Yepes

Gesualdi

2017

J. Microw. Optoelectron. Electromagn. Appl.

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Abstract-In this work, we present the optical recording and reconstruction of dynamic 3D digital holograms using optoelectronic devices. Digital Holography technique allows recording and reconstruction of three-dimensional images of real objects, since a hologram presents both the intensity and phase information about the object. The experimental implementation of digital holographic systems for recording, as well as for numerical and optical reconstruction of three-dimensional objects became possible. We developed an experimental setup that allowed the optical recording (construction) of dynamic digital holograms (DHs) from real three-dimensional objects in CCD cameras, together with their numerical reconstruction and their optical reconstruction in a dynamic process by using a spatial light modulator, SLM; it was used a single holographic experimental setup in the entire process. We have obtained good results that enable excellent prospects for applications in recording and reconstruction of 3D scenes.

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Section: Introductionmentioning

confidence: 99%

Dynamic Digital Holography for recording and reconstruction of 3D images using optoelectronic devices

Yepes

Gesualdi

2017

J. Microw. Optoelectron. Electromagn. Appl.

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“…Numerous techniques have been used such as moiré, 13 speckle interferometry, 14 and holography. 16,17 We previously described a dual-beam off-axis holographic interferometry method that used a single spherical mirror to simultaneously observe the front and rear of a tooth model. Holography has been extensively used to observe minute tissue deformations under mechanical stress.…”

Section: Introductionmentioning

confidence: 99%

Single-beam, dual-view digital holographic interferometry for biomechanical strain measurements of biological objects

2014

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We describe a method for dual-view biomechanical strain measurements of highly asymmetrical biological objects, like teeth or bones. By using a spherical mirror, we were able to simultaneously record a digital hologram of the object itself and the mirror image of its (otherwise invisible) rear side. A single laser beam was sufficient to illuminate both sides of the object, and to provide a reference beam. As a result, the system was mechanically very stable, enabling long exposure times (up to 2 min) without the need for vibration isolation. The setup is simple to construct and adjust, and can be used to interferometrically observe any object that is smaller than the mirror diameter. Parallel data processing on a CUDA-enabled (compute unified device architecture) graphics card was used to reconstruct digital holograms and to further correct image distortion. We used the setup to measure the deformation of a tooth due to mastication forces. The finite-element method was used to compare experimental results and theoretical predictions.

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“…Functional morphology of skull pillars has been related to the force dissipation and stress distribution in the skull, as well as the bony response to stresses both functional chewing (Fanuscu & Caputo, 2004;Caroena et al, 2010;Lima et al, 2011) and applied to maxillofacial surgery (Popowics et al, 2004;Ujigawa et al, 2007;Lima et al). Currently, the known methods to evaluate the morphological bone adaptation are: the bone displacement direction by photorefractive holographic interferometry (Caroena et al, 2010), stress analysis in photoelastic method (Lima et al), press transducer (Popowics et al) and computer simulations using finite element analysis (FEA) (Ujigawa et al;Erkmen et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the known methods to evaluate the morphological bone adaptation are: the bone displacement direction by photorefractive holographic interferometry (Caroena et al, 2010), stress analysis in photoelastic method (Lima et al), press transducer (Popowics et al) and computer simulations using finite element analysis (FEA) (Ujigawa et al;Erkmen et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Biomechanics of the Human Canine Pillar Based on its Geometry Using Finite Element Analysis

et al. 2014

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of the human canine pillar based on its geometry using finite element analysis. Int. J. Morphol., 32(1):214-220, 2014. SUMMARY:This study evaluated the stress distribution based on the canine pillar geometry in human skull, using a finite element analysis. Computed tomography of human skull was used to build a finite element model, which was composed by all bony structures of canine pillar: canine eminence, canine fossa, frontal process of maxilla, glabellum and superciliary arch. A support on the bite contact of maxillary canine tooth and a resultant force of the masticatory muscles was applied in the simulation. Equivalent Von-mises and maximum principal stresses were analyzed along the structures that compose the canine pillar geometry. Von-mises stress presented high stress concentrated at the canine fossa and frontal process of maxilla. Maximum principal stress showed compression areas at the canine fossa and part of frontal process and tensile stress at canine eminence and part of the frontal process. In conclusion, the different stress areas means different force concentrations transmitted along the canine pillar geometry during a peak canine bite.

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Mastication effort study using photorefractive holographic interferometry technique

Cited by 15 publications

References 22 publications

Dynamic Digital Holography for recording and reconstruction of 3D images using optoelectronic devices

Dynamic Digital Holography for recording and reconstruction of 3D images using optoelectronic devices

Single-beam, dual-view digital holographic interferometry for biomechanical strain measurements of biological objects

Biomechanics of the Human Canine Pillar Based on its Geometry Using Finite Element Analysis

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