Properties of axially loaded implant–abutment assemblies using digital holographic interferometry analysis

Brozović, Juraj; Demoli, Nazif; Farkaš, Nina; Sušić, Mato; Alar, Željko; Pandurić, Dragana Gabrić

doi:10.1016/j.dental.2013.12.005

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…Previous studies have shown that the elastic modulus of enamel is 40-80 GPa, while it is around 30 GPa in peritubular dentin and 16-21 GPa in inter-tubular dentin. It may be even lower (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) GPa) in regions as close as 500 μm from the pulp [28,29]. Chan et al found that enamel had an elastic modulus of ∼95 GPa, whereas dentin had an elastic modulus of ∼19 GPa from nano-indentation tests [30].…”

Section: Discussionmentioning

confidence: 99%

“…Digital moiré interferometry (DMI) was applied to decipher the dentin tissue biomechanics by fabricating gratings with ultra-high quality on an extremely flat surface [7]. Brozović J used digital holographic interferometry (DHI) to determine the properties of axially loaded dental implant-abutment assemblies [8]. Asundi and Kishen utilized photoelasticity to evaluate stress distribution, from the root surface to the supporting bone under clinical conditions [9].…”

Section: Introductionmentioning

confidence: 99%

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Measurement of biomechanical behavior of dentin hard tissue in response to unbound water loss using stereo-digital image correlation

Chen

Shao

2020

Mater. Res. Express

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Understanding the biomechanical behavior of dentin hard tissue with fluid-filled dentin tubules and hydrated matrices is essential for studying this functionally graded biological composite. The stereodigital image correlation technique with an adaptive high-magnification field of view (FOV) for fully hydrated biological tissue measurement was investigated. The adaptive magnification is controlled by the length of extension tubes. To determine both the unbound water loss induced and load-induced three-dimensional (3D) deformation of dentin hard tissue from a fully hydrated state to a nonhydrated condition, samples of dentin blocks and half teeth in sagittal sections were studied for a period of 2 h in situ over varied speckle patterns. The effects of speckles on water evaporation, camera pre-heating, and measurement accuracy in the wet, curved and long-term measurement were analyzed. The elastic modulus and Poisson's ratio of both dentin and pulp in response to unbound water evaporation were measured. With the unbound water loss, the mean values of the elastic modulus generally increased from ∼8 GPa to ∼10 GPa in pulp region and from ∼10 GPa to ∼12 GPa in dentin region. The mean values of the Poisson's ratio increased both in pulp and in dentin. Poisson's ratio in the dentin regions (∼0.3) were generally smaller than those in the pulp regions (even can reach 0.6), irrespective of the partial dehydration time. Further analysis of the full-field deformation results provided insight into the unbound water-induced regional deformations and mechanical changes in human dentin. It's found that the unbound water loss induced deformations were more prominent when compared to load induced deformations.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measurement of biomechanical behavior of dentin hard tissue in response to unbound water loss using stereo-digital image correlation

Chen

Shao

2020

Mater. Res. Express

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“…Photomechanical experiments such as photoelasticity , electronic speckle interferometry (ESPI) , digital holographic interferometry (DHI) , digital moiré interferometry (DMI) , optical coherence tomography (OCT) and digital image correlation (DIC) have been employed to study biomechanical responses of dental structures. However, very few techniques have determined 3D deformation states (eg, displacements, principle strains) on dentin structure in real‐time, under a fully hydrated condition to a nonhydrated state.…”

Section: Introductionmentioning

confidence: 99%

Whole‐field macro‐ and micro‐deformation characteristic of unbound water‐loss in dentin hard tissue

Chen

Nadeau

et al. 2018

Journal of Biophotonics

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High-resolution deformation measurements in a functionally graded hard tissue such as human dentin are essential to understand the unbound water-loss mediated changes and their role in its mechanical integrity. Yet a whole-field, 3-dimensional (3D) measurement and characterization of fully hydrated dentin in both macro- and micro-scales remain to be a challenge. This study was conducted in 2 stages. In stage-1, a stereo-digital image correlation approach was utilized to determine the water-loss and load-induced 3D deformations of teeth in a sagittal section over consecutively acquired frames, from a fully hydrated state to nonhydrated conditions for a period up to 2 hours. The macroscale analysis revealed concentrated residual deformations at the dentin-enamel-junction and the apical regions of root in the direction perpendicular to the dentinal tubules. Significant difference in the localized deformation characteristics was observed between the inner and outer aspects of the root dentin. During quasi-static loadings, further increase in the residual deformation was observed in the dentin. In stage-2, dentin microstructural variations induced by dynamic water-loss were assessed with environmental scanning electron microscopy and atomic force microscopy (AFM), showing that the dynamic water-loss induced distention of dentinal tubules with concave tubular edges, and concurrent contraction of intertubular dentin with convex profile. The findings from the current macro- and micro-scale analysis provided insight on the free-water-loss induced regional deformations and ultrastructural changes in human dentin.

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Advances in Speckle Metrology

Joenathan

Sirohi

Bernal

2015

The Optics Encyclopedia

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The field of speckle metrology has seen a surge in development in the past 10 years owing to advancements in digital cameras and computing power. For instance, a variety of digital speckle correlation (DSC) processes can now be performed in almost real time and therefore speckle techniques has found applications in nondestructive testing (NDT), biology, and medicine. New techniques in terms of optical arrangements and in extracting phase data have been introduced for measuring out‐of‐plane and in‐plane motions in digital speckle interferometry (DSPI) and digital speckle shear interferometry (DSSPI). DSC, DSPI, and DSSPI have also been combined to extend the range of measurements. In addition, quantitative analysis in speckle interferometry has seen a plethora of new software developments for conducting real‐time, accurate, complicated, fast, and repeatable measurements with ease. In addition, different methods to process speckle fringes have made analysis equivalent to that of classical interferometry, yet can be applied to all types of real‐world specimen.

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Properties of axially loaded implant–abutment assemblies using digital holographic interferometry analysis

Abstract: This study gained in vitro implant performance data, compared the deformations in implant bodies and numerically stated the biomechanical benefits of wider diameter implants.

Cited by 13 publications

References 27 publications

Measurement of biomechanical behavior of dentin hard tissue in response to unbound water loss using stereo-digital image correlation

Measurement of biomechanical behavior of dentin hard tissue in response to unbound water loss using stereo-digital image correlation

Whole‐field macro‐ and micro‐deformation characteristic of unbound water‐loss in dentin hard tissue

Advances in Speckle Metrology

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