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All › Investigative Techniques › Hardness Tests

Hardness Tests (0)

      Articles on Hardness Tests

      1. Transcription factor FoxO1 is essential for enamel biomineralization.
        Ross A RA Poché, Ramaswamy R Sharma, ... Mary E ME Dickinson

        PLoS One 7(1):e30357 (2012) PMID 22291941

        We show that mice mutant for Forkhead Box O transcription factor FoxO1 exhibit an enamel hypomaturation defect which phenocopies that of the Smad3 mutant mice. Furthermore, we determined that both the FoxO1 and Smad3 mutant teeth exhibit changes in the expression of similar cohort of genes encoding...
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      2. Reduced functional loads alter the physical characteristics of the bone-periodontal ligament-cementum complex.
        E L EL Niver, N N Leong, ... S P SP Ho

        J Periodontal Res 46(6):730-41 (2011) PMID 21848615

        Adaptive properties of the bone-periodontal ligament-tooth complex have been identified by changing the magnitude of functional loads using small-scale animal models, such as rodents. Reported adaptive responses as a result of lower loads due to softer diet include decreased muscle d...
      3. Contraction behaviors of dental composite restorations--finite element investigation with DIC validation.
        Shu-Fen SF Chuang, Chih-Han CH Chang, and Terry Yuan-Fang TY Chen

        J Mech Behav Biomed Mater 4(8):2138-49 (2011) PMID 22098914

        The objective of this study was to examine the effects of cavity configuration on the polymerization shrinkage and stress of light-cured composite restorations by combining local strain measurement and a finite element analysis (FEA). Dental mesio-occluso-distal cavities of various w...
      4. Direct comparison of nanoindentation and macroscopic measurements of bone viscoelasticity.
        Tara N TN Shepherd, Jingzhou J Zhang, ... Glen L GL Niebur

        J Mech Behav Biomed Mater 4(8):2055-62 (2011) PMID 22098905

        Nanoindentation has become a standard method for measuring mechanical properties of bone, especially within microstructural units such as individual osteons or trabeculae. The use of nanoindentation to measure elastic properties has been thoroughly studied and validated. However, it...
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      5. Neutron diffraction residual strain measurements in nanostructured hydroxyapatite coatings for orthopaedic implants.
        R R Ahmed, N H NH Faisal, ... K A KA Khor

        J Mech Behav Biomed Mater 4(8):2043-54 (2011) PMID 22098904

        The failure of an orthopaedic implant can be initiated by residual strain inherent to the hydroxyapatite coating (HAC). Knowledge of the through-thickness residual strain profile in the thermally sprayed hydroxyapatite coating/substrate system is therefore important in the developmen...
      6. Principal stiffness orientation and degree of anisotropy of human osteons based on nanoindentation in three distinct planes.
        Andreas G AG Reisinger, Dieter H DH Pahr, and Philippe K PK Zysset

        J Mech Behav Biomed Mater 4(8):2113-27 (2011) PMID 22098911

        Haversian systems or 'osteons' are cylindrical structures, formed by bone lamellae, that make up the major part of human cortical bone. Despite their discovery centuries ago in 1691 by Clopton Havers, their mechanical properties are still poorly understood. The objective of this stud...
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      7. Effect of five different dental products on surface hardness of enamel exposed to chlorinated water in vitro.
        Praphasri P Rirattanapong, Kadkao K Vongsavan, and Mullika M Tepvichaisillapakul

        Southeast Asian J Trop Med Public Health 42(5):1293-8 (2011) PMID 22299456

        The objective of this study was to assess the effect of five different dental products on surface microhardness of enamel exposed to chlorinated water in vitro. Sixty human sound premolar teeth, extracted for orthodontic reasons, were used and randomly divided into 6 groups (10 speci...
      8. Wedge indentation fracture of cortical bone: experimental data and predictions.
        Saeid S Kasiri, Ger G Reilly, and David D Taylor

        J Biomech Eng 132(8):081009 (2010) PMID 20670058

        The fracture of bone due to indentation with a hard, sharp object is of significance in surgical procedures and certain trauma situations. In the study described below, the fracture of bovine bone under indentation was measured experimentally and predicted using the theory of critical distances (TCD...
      9. A finite element model for direction-dependent mechanical response to nanoindentation of cortical bone allowing for anisotropic post-yield b...
        D Carnelli, D Gastaldi, ... P Vena

        J Biomech Eng 132(8):081008 (2010) PMID 20670057

        A finite element model was developed for numerical simulations of nanoindentation tests on cortical bone. The model allows for anisotropic elastic and post-yield behavior of the tissue. The material model for the post-yield behavior was obtained through a suitable linear transformation of the stress...
      10. Characterization of cellular solids in Ti6Al4V for orthopaedic implant applications: Trabecular titanium
        E E Marin, S S Fusi, ... L L Fedrizzi

        J Mech Behav Biomed Mater 3(5):9 (2010) PMID 20416551

        EBM (Electron Beam Melting) technology can be used successfully to obtain cellular solids in metallic biomaterials that can greatly increase osseointegration in arthroprothesis and at the same time maintain good mechanical properties. The investigated structures, called Trabecular Titanium, usually...