hardness

Summary

Top Publications

  1. ncbi Physical and mechanical properties of an experimental dental composite based on a new monomer
    M Atai
    Iran Polymer and Petrochemical Institute IPPI, P O Box 14965 115 Tehran, Iran
    Dent Mater 20:663-8. 2004
  2. ncbi Effect of LED light-curing on the relative hardness of tooth-colored restorative materials
    Enas Mobarak
    Department of Operative Dentistry, Faculty of Dentistry, Cairo University, Cairo, Egypt
    Oper Dent 34:65-71. 2009
  3. ncbi Graphene oxide papers modified by divalent ions-enhancing mechanical properties via chemical cross-linking
    Sungjin Park
    Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 3111, USA
    ACS Nano 2:572-8. 2008
  4. pmc Structural hierarchies define toughness and defect-tolerance despite simple and mechanically inferior brittle building blocks
    Dipanjan Sen
    Laboratory for Atomistic and Molecular Mechanics, Department of Civil and Environmental Engineering, 77 Massachusetts Ave Room 1 235A and B, Cambridge, MA 02139, USA
    Sci Rep 1:35. 2011
  5. ncbi The effect of pH on surface hardness and microstructure of mineral trioxide aggregate
    M S Namazikhah
    Private Practice, Beverly Hills, CA, USA
    Int Endod J 41:108-16. 2008
  6. ncbi Materials design principles of ancient fish armour
    Benjamin J F Bruet
    Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
    Nat Mater 7:748-56. 2008
  7. ncbi Atomic analysis and knoop hardness measurement of the cavity floor prepared by Er,Cr:YSGG laser irradiation in vitro
    M Hossain
    Department of Endodontics, School of Dentistry, Showa University, Ohta ku, Tokyo
    J Oral Rehabil 30:515-21. 2003
  8. ncbi Changes in hardness of the human elbow flexor muscles after eccentric exercise
    M Murayama
    Institute of Physical Education, Keio University, Yokohama, Japan
    Eur J Appl Physiol 82:361-7. 2000
  9. ncbi Nanoindentation hardness of mineralized tissues
    Michelle L Oyen
    Department of Biophysical Sciences and Medical Physics, University of Minnesota, Minneapolis, MN 55455, USA
    J Biomech 39:2699-702. 2006
  10. ncbi Functional ecology and evolution of hominoid molar enamel thickness: Pan troglodytes schweinfurthii and Pongo pygmaeus wurmbii
    Erin R Vogel
    Department of Anthropology, 1156 High Street, University of California Santa Cruz, CA 95064, United States
    J Hum Evol 55:60-74. 2008

Detail Information

Publications318 found, 100 shown here

  1. ncbi Physical and mechanical properties of an experimental dental composite based on a new monomer
    M Atai
    Iran Polymer and Petrochemical Institute IPPI, P O Box 14965 115 Tehran, Iran
    Dent Mater 20:663-8. 2004
    ....
  2. ncbi Effect of LED light-curing on the relative hardness of tooth-colored restorative materials
    Enas Mobarak
    Department of Operative Dentistry, Faculty of Dentistry, Cairo University, Cairo, Egypt
    Oper Dent 34:65-71. 2009
    To determine the relative hardness of GI-based restorative materials using both LED and QTH curing lights at different post-irradiation intervals.
  3. ncbi Graphene oxide papers modified by divalent ions-enhancing mechanical properties via chemical cross-linking
    Sungjin Park
    Department of Mechanical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208 3111, USA
    ACS Nano 2:572-8. 2008
    ..While oxygen functional groups on the basal planes of the sheets and the carboxylate groups on the edges can both bond to Mg(2+) and Ca(2+), the main contribution to mechanical enhancement of the paper comes from the latter...
  4. pmc Structural hierarchies define toughness and defect-tolerance despite simple and mechanically inferior brittle building blocks
    Dipanjan Sen
    Laboratory for Atomistic and Molecular Mechanics, Department of Civil and Environmental Engineering, 77 Massachusetts Ave Room 1 235A and B, Cambridge, MA 02139, USA
    Sci Rep 1:35. 2011
    ..This presents a significant departure from the defect-tolerance of the base material, silica, which is brittle and highly sensitive even to extremely small nanometer-scale defects...
  5. ncbi The effect of pH on surface hardness and microstructure of mineral trioxide aggregate
    M S Namazikhah
    Private Practice, Beverly Hills, CA, USA
    Int Endod J 41:108-16. 2008
    ..In addition, the morphological microstructure features of samples were studied by scanning electron microscopy (SEM)...
  6. ncbi Materials design principles of ancient fish armour
    Benjamin J F Bruet
    Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
    Nat Mater 7:748-56. 2008
    ....
  7. ncbi Atomic analysis and knoop hardness measurement of the cavity floor prepared by Er,Cr:YSGG laser irradiation in vitro
    M Hossain
    Department of Endodontics, School of Dentistry, Showa University, Ohta ku, Tokyo
    J Oral Rehabil 30:515-21. 2003
    In the present study, the compositional changes and knoop hardness of the cavity floor prepared by Er,Cr:YSGG laser irradiation was compared with that of the conventional bur cavity...
  8. ncbi Changes in hardness of the human elbow flexor muscles after eccentric exercise
    M Murayama
    Institute of Physical Education, Keio University, Yokohama, Japan
    Eur J Appl Physiol 82:361-7. 2000
    The purpose of this study was to investigate changes in muscle hardness after eccentric exercise of the elbow flexors muscles that produce muscle shortening and swelling...
  9. ncbi Nanoindentation hardness of mineralized tissues
    Michelle L Oyen
    Department of Biophysical Sciences and Medical Physics, University of Minnesota, Minneapolis, MN 55455, USA
    J Biomech 39:2699-702. 2006
    A series elastic and plastic deformation model [Sakai, M., 1999. The Meyer hardness: a measure for plasticity? Journal of Materials Research 14(9), 3630-3639] is used to deconvolute the resistance to plastic deformation from the plane ..
  10. ncbi Functional ecology and evolution of hominoid molar enamel thickness: Pan troglodytes schweinfurthii and Pongo pygmaeus wurmbii
    Erin R Vogel
    Department of Anthropology, 1156 High Street, University of California Santa Cruz, CA 95064, United States
    J Hum Evol 55:60-74. 2008
    ..paradigm for examining the adaptive form-function relationship between molar enamel thickness and food hardness. Although both species exhibit a categorical preference for ripe fruit over other food objects, the thick enamel ..
  11. ncbi Physical mapping and a new variant of Puroindoline b-2 genes in wheat
    Feng Chen
    Henan Agricultural University, Zhengzhou, China
    Theor Appl Genet 120:745-51. 2010
    ..The discovery of Pinb-2v4 and the mapping of all four variants will contribute to a better understanding of gene duplication events in wheat and their bearing on wheat kernel texture and grain utilization...
  12. ncbi Influence of curing method, sealer, and water storage on the hardness of a soft lining material over time
    G L Polyzois
    Department of Removable Prosthodontics, University of Athens, Dental School, 2 Thivon Street, 115 27 Athens, Greece
    J Prosthodont 10:42-5. 2001
    The purpose of this study was to determine the hardness of plasticized acrylic resin soft lining materials over time when curing procedures were modified and when surface sealers were either used or omitted.
  13. ncbi Effect of fluoride varnish and gel on dental erosion in primary and permanent teeth
    Christiana Murakami
    Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Sao Paulo, Av Lineu Prestes, 2227, 05508 000 Sao Paulo, SP, Brazil
    Arch Oral Biol 54:997-1001. 2009
    ..To assess the effect of a fluoride varnish and gel on the erosive wear of primary and permanent teeth...
  14. ncbi Effects of storage temperature on surface hardness, microstructure, and phase formation of white mineral trioxide aggregate
    Mohammad Ali Saghiri
    Department of Biomedical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
    J Endod 36:1414-8. 2010
    ....
  15. ncbi Evaluation of the Shore A hardness of silicone for facial prosthesis as to the effect of storage period and chemical disinfection
    Aimée Maria Guiotti
    Department of Dental Materials and Prosthodontics, Santa Fé do Sul Dental School, Faculdades Integradas de Santa Fé do Sul, Santa Fé do Sul, Brazil
    J Craniofac Surg 21:323-7. 2010
    ..Therefore, this study evaluated the Shore A hardness of silicone used for fabrication of facial prostheses, Silastic MDX4-4210, according to the influence of storage ..
  16. ncbi Comparison of photo-activation versus chemical or dual-curing of resin-based luting cements regarding flexural strength, modulus and surface hardness
    N Hofmann
    Department of Operative Dentistry and Periodontology, Bavarian Julius Maximilians University of Würzburg, Germany
    J Oral Rehabil 28:1022-8. 2001
    ..only CC) were prepared and tested after 24 h for flexural strength, modulus of elasticity (ISO 4049) and surface hardness (Vickers)...
  17. pmc Surface hardness impairment of quorum sensing and swarming for Pseudomonas aeruginosa
    Nachiket G Kamatkar
    Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, Indiana, United States of America
    PLoS ONE 6:e20888. 2011
    ..This suggests that quorum sensing on surfaces is controlled in a manner that is not solely population dependent...
  18. ncbi Effect of light-curing method on wear and hardness of composite resin
    Ibrahim M Hammouda
    Faculty of Dentistry, Mansoura University, Department of Dental Biomaterials, Mansoura, Egypt
    J Mech Behav Biomed Mater 3:216-22. 2010
    ..Weight loss was recorded using a conventional Tribometer (mg). Specimens cured using LED showed greater hardness and less wear compared to conventional VLC-cured specimens under comparable test conditions...
  19. pmc Measurements of attenuation coefficient for evaluating the hardness of a cataract lens by a high-frequency ultrasonic needle transducer
    Chih Chung Huang
    Department of Electronic Engineering, Fu Jen Catholic University, Taipei 24205, Taiwan, Republic of China
    Phys Med Biol 54:5981-94. 2009
    ..for treating cataracts, and determining that the optimal phacoemulsification energy is dependent on measuring the hardness of the lens...
  20. ncbi Wear characteristics of current aesthetic dental restorative CAD/CAM materials: two-body wear, gloss retention, roughness and Martens hardness
    Werner H Mörmann
    Department of Computer Assisted Restorative Dentistry, Center of Dental Medicine, University of Zurich, Plattenstrasse 11, 8032 Zurich, Switzerland
    J Mech Behav Biomed Mater 20:113-25. 2013
    ..wear and toothbrushing wear parameters, including gloss and roughness measurements and additionally Martens hardness, of nine aesthetic CAD/CAM materials, one direct resin-based nanocomposite plus that of human enamel as a control ..
  21. ncbi Effect of repeated cycles of chemical disinfection on the roughness and hardness of hard reline acrylic resins
    Luciana de Rezende Pinto
    Department of Prosthodontics, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP, Brazil
    Gerodontology 27:147-53. 2010
    The aim of this study was to assess the effect of repeated cycles of five chemical disinfectant solutions on the roughness and hardness of three hard chairside reliners.
  22. ncbi Long-term antibacterial effects and physical properties of a chlorhexidine-containing glass ionomer cement
    L Sebnem Türkün
    Department of Restorative Dentistry and Endodontics, Ege University, School of Dentistry, Izmir, Turkey
    J Esthet Restor Dent 20:29-44; discussion 45. 2008
    ..For restorative techniques used in these regions, an antibacterial self-adherent glass ionomer material would contribute considerably...
  23. pmc Reliability and validity of quantifying absolute muscle hardness using ultrasound elastography
    Kentaro Chino
    Department of Life Sciences Sports Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
    PLoS ONE 7:e45764. 2012
    Muscle hardness is a mechanical property that represents transverse muscle stiffness...
  24. ncbi NovaMin and dentin hypersensitivity--in vitro evidence of efficacy
    Anora Burwell
    NovaMin Technology Inc, Alachua, FL, USA
    J Clin Dent 21:66-71. 2010
    ..The objective of this study was to determine the ability of a calcium sodium phosphosilicate (NovaMin) particulate to occlude dentin tubules, and to characterize the nature of the occlusion through a number of in vitro studies...
  25. ncbi Silorane-based dental composite: behavior and abilities
    Nicoleta Ilie
    Department of Restorative Dentistry, Dental School of the Ludwig Maximilians University, Munich, Germany
    Dent Mater J 25:445-54. 2006
    ..Degree of conversion at 2-mm and 6-mm depths as well as hardness, modulus of elasticity, and creep resistance through the middle of 6-mm high samples were measured...
  26. ncbi Correlation of bottom-to-top surface microhardness and conversion ratios for a variety of resin composite compositions
    Murray R Bouschlicher
    Department of Operative Dentistry, College of Dentistry, The University of Iowa, Iowa City, IA, USA
    Oper Dent 29:698-704. 2004
    ..Cure and hardness data were analyzed with one- and two-way ANOVAs followed by the Tukey-Kramer post-hoc test...
  27. ncbi Human iliac crest cancellous bone elastic modulus and hardness differ with bone formation rate per bone surface but not by existence of prevalent vertebral fracture
    Xiang Wang
    Lawrence J Ellison Musculoskeletal Research Center, University of California Davis Medical Center, Room 2000, Research Facility I, 4635 Second Avenue, Sacramento, California 95817, USA
    J Biomed Mater Res B Appl Biomater 85:68-77. 2008
    The goals of this study were to measure tissue-level elastic moduli and hardness of human cancellous bone using nanoindentation, and determine the relationship between nanoindentation results and previously measured bone histomorphometric ..
  28. ncbi Food hardness as environmental factor in development of type 2 diabetes
    Koji Nojima
    Department of Geriatric Medicine, Osaka University Graduate School of Medicine, 2 2 Yamadaoka, Suita, Osaka 565 0871, Japan
    Diabetes Res Clin Pract 74:1-7. 2006
    The effect of hardness of the diet as an environmental factor on the development of diabetes was investigated in a mouse model of type 2 diabetes. NSY and control C3H/He mice were fed several types of dietary chow from 4 weeks of age...
  29. ncbi Nonlinear material behaviour of spider silk yields robust webs
    Steven W Cranford
    Laboratory for Atomistic and Molecular Mechanics, Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
    Nature 482:72-6. 2012
    ..The superior performance of silk in webs is therefore not due merely to its exceptional ultimate strength and strain, but arises from the nonlinear response of silk threads to strain and their geometrical arrangement in a web...
  30. ncbi Potential agents to control enamel caries-like lesions
    F C Rehder Neto
    Department of Restorative Dentistry, School of Dentistry of Ribeirao Preto, University of Sao Paulo, Sao Paulo, Brazil
    J Dent 37:786-90. 2009
    ..To assess whether pastes containing casein phosphopeptide-amorphous calcium phosphate (CPP-ACP) and calcium sodium phosphosilicate (CSP) control artificial caries lesion progression...
  31. ncbi Effect of irradiation type (LED or QTH) on photo-activated composite shrinkage strain kinetics, temperature rise, and hardness
    Norbert Hofmann
    Department of Operative Dentistry and Periodontology, Bavarian Julius Maximilians University of Würzburg, Wurzburg, Germany
    Eur J Oral Sci 110:471-9. 2002
    ..Surface hardness (Knoop) at the bottom of 1...
  32. ncbi Scanning electron micrograph and surface hardness of mineral trioxide aggregate in the presence of alkaline pH
    Mohammad Ali Saghiri
    Department of Biomedical Engineering, Islamic Azad University Science and Research Branch, Azad University of Medical Sciences, Tehran, Iran
    J Endod 35:706-10. 2009
    The aim of this study was to evaluate morphologic microstructure and surface hardness of white mineral trioxide aggregate (WMTA) after exposure to a range of alkaline environments during hydration.
  33. ncbi Light transmission through fiber post: the effect on adhesion, elastic modulus and hardness of dual-cure resin cement
    Ivana Radovic
    Clinic for Pediatric and Preventive Dentistry, Faculty of Dentistry, University of Belgrade, Dr Subotica 11, Beograd 11000, Serbia
    Dent Mater 25:837-44. 2009
    ..this study was to investigate the effect of fiber post light transmitting ability to the continuity of resin cement-root dentin (C-RD) and resin cement-fiber post (C-FP) interface, elastic modulus and hardness of a dual-cure resin cement.
  34. ncbi The RNA-mediated silencing of one of the Pin genes in allohexaploid wheat simultaneously decreases the expression of the other, and increases grain hardness
    Sebastian Gasparis
    Plant Transformation and Cell Engineering Department, Plant Breeding and Acclimatization Institute National Research Institute, Radzikow, 05 870 Blonie, Poland
    J Exp Bot 62:4025-36. 2011
    ..or lack of both puroindoline proteins in the silenced lines correlated with an essential increase in grain hardness. The discussion covers some new insights into the function of the Pin genes, including the simultaneous silencing ..
  35. ncbi Respective roles of organic and mineral components of human cortical bone matrix in micromechanical behavior: an instrumented indentation study
    Y Bala
    INSERM, UMR1033, F 69008 Lyon, France
    J Mech Behav Biomed Mater 4:1473-82. 2011
    ..of known DMB were indented with relatively high load (~500 mN) to determine local elastic modulus (E), contact hardness (H(c)) and true hardness (H) of several bone lamellae...
  36. ncbi Fluoride uptake and development of artificial erosions in bleached and fluoridated enamel in vitro
    G M Burgmaier
    Department of Operative Dentistry, Preventive Dentistry and Periodontology, University of Gottingen, Gottingen, Germany
    J Oral Rehabil 29:799-804. 2002
    ..It is concluded that it is not feasible to improve fluoride uptake in enamel with a pre-treatment with 10% CP...
  37. ncbi Radiodensity and hardness of enamel and dentin of human and bovine teeth, varying bovine teeth age
    R B Fonseca
    Health Sciences Center, Department of Restorative Dentistry, State University of Londrina, R Pernambuco 540, Londrina 86020 120, PR, Brazil
    Arch Oral Biol 53:1023-9. 2008
    ..The aim of this study was to evaluate the radiodensity and hardness of human and bovine enamel and dentin, varying bovine teeth age...
  38. ncbi Maize kernel hardness classification by near infrared (NIR) hyperspectral imaging and multivariate data analysis
    Paul Williams
    Department of Food Science, Stellenbosch University, Private Bag X1, Matieland Stellenbosch, 7602, South Africa
    Anal Chim Acta 653:121-30. 2009
    ..18. The sisuChema image yielded RMSEP value of 0.29. The reproducible results obtained with the different data sets indicate that the method proposed in this paper has a real potential for future classification uses...
  39. ncbi High power light emitting diode (LED) arrays versus halogen light polymerization of oral biomaterials: Barcol hardness, compressive strength and radiometric properties
    Robin W Mills
    Department of Oral and Dental Science, University of Bristol, UK
    Biomaterials 23:2955-63. 2002
    ..This study investigates the Barcol hardness as a function of depth, and the compressive strength of dental composites that had been polymerized for 40 or 20s ..
  40. ncbi Indentation as a technique to assess the mechanical properties of fallback foods
    Peter W Lucas
    Department of Anthropology, Center for the Advanced Study of Human Paleobiology, The George Washington University, Washington, DC 20052, USA
    Am J Phys Anthropol 140:643-52. 2009
    A number of living primates feed part-year on seemingly hard food objects as a fallback. We ask here how hardness can be quantified and how this can help understand primate feeding ecology...
  41. ncbi Diametral tensile strength and Vickers hardness of a composite after storage in different solutions
    Igor S Medeiros
    Department of Dental Materials, School of Dentistry, University of Sao Paulo, Sao Paulo, Brazil
    J Oral Sci 49:61-6. 2007
    This study evaluated the Vickers hardness (VHN) and diametral tensile strength (DTS) of the composite Z100 (3M ESPE) cured with: Quartz-Tungsten-Halogen light curing unit (QTH) (700mW/cm2- 40 s) and Argon laser (1,000mW/cm2- 10 s)...
  42. ncbi Biochemical composition and cariogenicity of dental plaque formed in the presence of sucrose or glucose and fructose
    J A Cury
    Faculty of Dentistry of Piracicaba, State University of Campinas, SP, Brazil
    Caries Res 34:491-7. 2000
    ....
  43. pmc Micro-mechanical modeling of the cement-bone interface: the effect of friction, morphology and material properties on the micromechanical response
    Dennis Janssen
    Radboud University Nijmegen Medical Centre, Orthopaedic Research Laboratory, P O Box 9101, 6500 HB Nijmegen, The Netherlands
    J Biomech 41:3158-63. 2008
    ..The current study provides information that may help to better understand the load-transfer mechanisms taking place at the cement-bone interface...
  44. ncbi Effect of light curing modes and light curing time on the microhardness of a hybrid composite resin
    Flavio Henrique Baggio Aguiar
    Department of Restorative Dentistry, Piracicaba School of Dentistry, Campinas State University, Sao Paulo, Brazil
    J Contemp Dent Pract 8:1-8. 2007
    ..The aim of this in vitro study was to evaluate the influence of light curing modes and curing time on the microhardness of a hybrid composite resin...
  45. ncbi In situ observation of nanograin rotation and deformation in nacre
    Xiaodong Li
    Department of Mechanical Engineering, University of South Carolina, 300 Main Street, Columbia, South Carolina 29208, USA
    Nano Lett 6:2301-4. 2006
    ..The biopolymer spacing between the nanograins facilitates the grain rotation process. The aragonite nanograins in nacre are not brittle but deformable...
  46. ncbi Effect of fluoride containing bleaching agents on enamel surface properties
    Hui Ping Chen
    Institute of Oral Medicine, National Cheng Kung University, Tainan 701, Taiwan
    J Dent 36:718-25. 2008
    ..To evaluate the effects of fluoridated bleaching agents and post-bleaching fluoridation treatment on the whitening efficiency and microhardness of bovine enamel...
  47. ncbi Flexural strength and hardness of direct and indirect composites
    Márcia Borba
    Dental Materials, University of Sao Paulo, SP, Brazil
    Braz Oral Res 23:5-10. 2009
    The objective of this study was to evaluate the flexural strength (sigma f) and hardness (H) of direct and indirect composites, testing the hypotheses that direct resin composites produce higher sigma f and H values than indirect ..
  48. ncbi Hardness evaluation of a dental composite polymerized with experimental LED-based devices
    C Kurachi
    São Carlos Institute of Physics, University of Sao Paulo, Caixa Postal 369, 13560 970, Sao Carlos, SP, Brazil
    Dent Mater 17:309-15. 2001
    The main goal of this study was the hardness evaluation of a composite resin cured by five LED (Light Emitting Diodes) based devices and a comparison with a conventional curing unit...
  49. ncbi Preparation and evaluation of dental resin luting agents with increasing content of bisphenol-A ethoxylated dimethacrylate
    Rafael R Moraes
    Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, P O Box 52, University of Campinas UNICAMP Av Limeira 901 13414 903 Piracicaba, SP Brazil
    J Biomater Appl 24:453-73. 2010
    ..Degree of conversion (DC), diametral tensile strength (DTS), Young's modulus (YM), Knoop hardness (KHN), film thickness (FT), water sorption (W(sp) ), and solubility are evaluated...
  50. ncbi Physical properties of a new silorane-based restorative system
    Wen Lien
    Advanced Education in General Dentistry Residency, Wilford Hall Medical Center, Lackland AFB, TX 78236, USA
    Dent Mater 26:337-44. 2010
    ..To distinguish the physical properties of a new silorane-based restorative material in comparison to five methacrylate-based restorative materials--a compomer, giomer, nanocomposite, hybrid and micro-hybrid...
  51. pmc Nucleotide polymorphism in the wheat transcriptional activator Spa influences its pattern of expression and has pleiotropic effects on grain protein composition, dough viscoelasticity, and grain hardness
    Catherine Ravel
    INRA, UMR1095, Genetics, Diversity, and Ecophysiology of Cereals, F 63100 Clermont Ferrand, France
    Plant Physiol 151:2133-44. 2009
    ..Except for Spa-A, these associations can be explained by differences in grain hardness. No association was found between Spa markers and the average single grain dry mass or grain protein ..
  52. ncbi In-depth polymerization of dual-cured resin cement assessed by hardness
    Rogério V Reges
    Department of Restorative Dentistry, Dental Materials Division Piracicaba Dental School, State University of Campinas Av Limeira, 901 13414 903 Piracicaba, SP, Brazil
    J Biomater Appl 23:85-96. 2008
    ..Control samples are light-cured without using ceramic. Samples are tested after 15 min or 24 h. Knoop hardness readings are made at 100, 300, 500, and 700 microm depth...
  53. ncbi Change in surface hardness of enamel by a cola drink and a CPP-ACP paste
    D Tantbirojn
    Department of Restorative Sciences, University of Minnesota, Minneapolis, USA
    J Dent 36:74-9. 2008
    ..microhardness to evaluate whether a paste containing casein phosphopeptide amorphous calcium phosphate (CPP-ACP) can reharden tooth enamel softened by a cola drink, and how different saliva-substitute solutions affect the enamel hardness.
  54. ncbi The effect of different light-curing units on fatigue behavior and degree of conversion of a resin composite
    Ulrich Lohbauer
    Policlinic for Operative Dentistry and Periodontology, University of Erlangen Nuremberg, Gluckstrasse 11, D 91054 Erlangen, Germany
    Dent Mater 21:608-15. 2005
    ..The aim of this study was to investigate the effect of different light-curing units and irradiation modes on the mechanical fatigue strength and degree of conversion of a restorative resin composite...
  55. ncbi Effect of acidic food and drinks on surface hardness of enamel, dentine, and tooth-coloured filling materials
    S Wongkhantee
    Department of Operative Dentistry, Khon Kaen University, Khon Kaen, Thailand
    J Dent 34:214-20. 2006
    ..of acidic food and drinks (Cola soft drink, drinking yogurt, orange juice, sports drink, Tom-yum soup) on surface hardness of various substrates (enamel, dentine, universal composite, microfilled composite, conventional glass ionomer, ..
  56. ncbi Effect of different peroxide bleaching regimens and subsequent fluoridation on the hardness of human enamel and dentin
    Israel Lewinstein
    Department of Oral Rehabilitation, The Maurice and Gabriela Goldshleger School of Dental Medicine, Universeity of Tel Aviv, Tel Aviv, Israel
    J Prosthet Dent 92:337-42. 2004
    Bleaching of teeth by "in-office" or "home" bleaching techniques are popular methods of whitening teeth. However, bleaching may reduce the surface hardness of enamel and dentin.
  57. ncbi Hardness and diametral tensile strength of a hybrid composite resin polymerized with different modes and immersed in ethanol or distilled water media
    Flávio H B Aguiar
    Department of Restorative Dentistry, Piracicaba School of Dentistry, Campinas State University, Brazil
    Dent Mater 21:1098-103. 2005
    ..The aim of this in vitro study was to evaluate the microhardness and diametral tensile strength of a hybrid composite resin (Z250, 3M ESPE) polymerized with four different modes of light exposure and immersed in two different media...
  58. ncbi Correspondence between food consistency and suprahyoid muscle activity, tongue pressure, and bolus transit times during the oropharyngeal phase of swallowing
    Hiroshige Taniguchi
    Div of Dysphagia Rehabilitation, Niigata Univ Graduate School of Medical and Dental Sciences, Chuo Ku, Niigata 951 8514, Japan
    J Appl Physiol (1985) 105:791-9. 2008
    ..The peak, area, and time duration of all of the variables for AT and PT and EMG burst increased with increasing hardness of the bolus...
  59. ncbi Effect of LED curing on the microleakage, shear bond strength and surface hardness of a resin-based composite restoration
    Theunis G Oberholzer
    Department of Operative Dentistry, Faculty of Dentistry, Medical University of Southern Africa, South Africa
    Biomaterials 26:3981-6. 2005
    ..the effect of Light emitting diode (LED) curing on dental resins, microleakage, shear bond strength and surface hardness of a dental composite cured with different LEDs were determined and compared with conventional halogen curing...
  60. ncbi Knoop hardness depth profiles and compressive strength of selected dental composites polymerized with halogen and LED light curing technologies
    Alexander Uhl
    Department of Materials Science and Technology, Friedrich Schiller University Jena, Löbdergraben 32, D 07743 Jena, Germany
    J Biomed Mater Res 63:729-38. 2002
    ..Both technologies were compared by measuring compressive strength and Knoop hardness depth profiles for selected dental composites polymerized for 20 or 40 s...
  61. ncbi Effects of new formulas of bleaching gel and fluoride application on enamel microhardness: an in vitro study
    Juliana B da Costa
    Department of Restorative Dentistry, Division of Operative Dentistry, Oregon Health and Science University OHSU School of Dentistry, Portland, OR, USA
    Oper Dent 32:589-94. 2007
    ..evaluated the new formulas of bleaching products and the effect of subsequent applications of fluoride on the hardness of enamel during and after tooth bleaching...
  62. ncbi Comparative hardness and modulus of tooth-colored restoratives: a depth-sensing microindentation study
    Adrian U Jin Yap
    Restorative Dentistry, Faculty of Dentistry, National University of Singapore, 5 Lower Kent Ridge Road, Singapore 119074, Singapore
    Biomaterials 25:2179-85. 2004
    The objective of this study was to compare the hardness and modulus of the continuum of direct tooth-colored restorative materials using a depth-sensing microindentation approach...
  63. ncbi Beneficial effects of hydroxyapatite on enamel subjected to 30% hydrogen peroxide
    Tao Jiang
    Key Laboratory for Oral Biomedical Engineering, Ministry of Education, School and Hospital of Stomatology, Wuhan University, 237 Luoyu Road, Wuhan 430079, PR China
    J Dent 36:907-14. 2008
    ..To evaluate the effect of combination of hydroxyapatite (HA) and hydrogen peroxide (HP) on color, microhardness and morphology of human tooth enamel...
  64. ncbi Wear performance of large-diameter differential-hardness hip bearings
    C Lowry Barnes
    Arkansas Specialty Orthopaedics, Little Rock, Arkansas 72205, USA
    J Arthroplasty 23:56-60. 2008
    We hypothesized that differential-hardness hard-on-hard bearings would generate less wear debris compared with like-hardness metal-on-metal (M-o-M) bearings...
  65. ncbi Evaluation of hardness and surface roughness of two maxillofacial silicones following disinfection
    Marcelo Coelho Goiato
    Department of Dental Materials and Prosthesis, School of Dentistry of Aracatuba, Sao Paulo State University, Aracatuba, SP, Brazil
    Braz Oral Res 23:49-53. 2009
    The purpose of this study was to evaluate the Shore A hardness and surface roughness of two silicones for maxillofacial prosthetic treatment, under the influence of chemical disinfection and storage...
  66. ncbi Nanoindentation of orthodontic archwires: The effect of decontamination and clinical use on hardness, elastic modulus and surface roughness
    Joseph P Alcock
    Division of Child Dental Health, Bristol Dental School, University of Bristol, Bristol, UK
    Dent Mater 25:1039-43. 2009
    ..of this research was to investigate the effects of decontamination and clinical exposure on the elastic moduli, hardness and surface roughness of two frequently used orthodontic archwires, namely 0.020in.x0.020in...
  67. ncbi Assessment of muscle hardness changes induced by a submaximal fatiguing isometric contraction
    A Nordez
    Universite de Nantes, Nantes Atlantique Universites, Laboratoire Motricite, Interactions, Performance, JE 2438, UFR STAPS, 25 bis Bd Guy Mollet BP 72206, Nantes F 44000, France
    J Electromyogr Kinesiol 19:484-91. 2009
    Transient elastography consists of measuring the transverse local shear elastic modulus defined as local muscle hardness (LMH). It has previously been shown that LMH is correlated to muscle activity level during non-fatiguing contractions...
  68. ncbi Effects of light exposure time on composite resin hardness after root reinforcement using translucent fibre post
    Cleonice da Silveira Teixeira
    School of Dentistry, University of Ribeirao Preto UNAERP, Ribeirao Preto, SP, Brazil
    J Dent 36:520-8. 2008
    The purpose of this in vitro study was to evaluate the Vickers hardness (VHN) of a Light Core (Bisco) composite resin after root reinforcement, according to the light exposure time, region of intracanal reinforcement and lateral distance ..
  69. pmc Nature of hardness evolution in nanocrystalline NiTi shape memory alloys during solid-state phase transition
    Abbas Amini
    Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3217, Australia
    Sci Rep 3:2476. 2013
    ..of thermomechanical smart materials' reaction to applied loads, a revolutionary approach is needed to measure the hardness and to understand its size effect for pseudoelastic NiTi shape memory alloys (SMAs) during the solid-state phase ..
  70. ncbi Injury risk associated with ground hardness in junior cricket
    Dara M Twomey
    School of Human Movement and Sport Sciences, University of Ballarat, Australia
    J Sci Med Sport 15:110-5. 2012
    To establish if there is an association between ground hardness and injury risk in junior cricket.
  71. ncbi Assessment of pancreatic hardness-surgeon versus durometer
    Orlin Belyaev
    Department of Surgery, St Josef Hospital, Ruhr University Bochum, Bochum, Germany
    J Surg Res 158:53-60. 2010
    This study reports the first results of durometrically measured hardness of human pancreas and investigates its correlation to palpatory determined hardness, grade of pancreatic fibrosis, and preoperatively determined radiodensity.
  72. ncbi Microhardness and fluoride release of restorative materials in different storage media
    Kélio Garcia Silva
    Department of Pediatric and Social Dentistry, School of Dentistry of Aracatuba, Sao Paulo State University, Aracatuba, SP, Brazil
    Braz Dent J 18:309-13. 2007
    ..4 +/- 7.1), Fuji II LC (5.7 +/- 4.7) and Freedom (2.1 +/- 1.7) had higher fluoride release at pH 4.6. Microhardness and fluoride release of the tested restorative materials varied according to the storage medium...
  73. ncbi Effect of water on the physical properties of resin-modified glass ionomer cements
    M A Cattani-Lorente
    Laboratory of Dental Materials, School of Dentistry, Geneva, Switzerland
    Dent Mater 15:71-8. 1999
    ..This work was conducted to study the effect of water sorption on the physical properties of several resin-modified GIC, by changing the samples' storage conditions...
  74. ncbi Enamel properties after tooth bleaching with hydrogen/carbamide peroxides in association with a CPP-ACP paste
    Adriana Alcantara Meira de Vasconcelos
    School of Dentistry, Potiguar University Laureate International Universities, Natal, Brazil
    Acta Odontol Scand 70:337-43. 2012
    ..This study evaluated the impact of bleaching teeth using blends of a CPP-ACP paste (MI Paste; MI) and carbamide/hydrogen peroxides in different proportions on surface properties of bleached enamel...
  75. ncbi Physical properties of the dentin-enamel junction region
    I Urabe
    Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Japan
    Am J Dent 13:129-35. 2000
    ..To determine the physical properties between enamel and dentin at the dentin-enamel junction (DEJ) region of natural tooth structure...
  76. ncbi Physicochemical characterization and preliminary in vivo efficacy of bioadhesive, semisolid formulations containing flurbiprofen for the treatment of gingivitis
    D S Jones
    The Pharmaceutical Sciences Group, School of Pharmacy, and Division of Restorative Dentistry Periodontics, The Queen s University of Belfast, Medical Biology Centre, 97, Lisburn Road, Belfast BT9 7BL, Northern Ireland, United Kingdom
    J Pharm Sci 88:592-8. 1999
    ..Flurbiprofen release into PBS pH 7.4 was performed at 37 degrees C. The mechanical properties (hardness, compressibility, adhesiveness, initial stress) and syringeability of formulations were determined using a ..
  77. ncbi Structure and mechanical properties of selected biological materials
    P Y Chen
    Materials Science and Engineering Program, UC San Diego, La Jolla, CA 92037 0411, United States
    J Mech Behav Biomed Mater 1:208-26. 2008
    ..In this paper, we report on recent progress on studies of the abalone and Araguaia river clam shells, arthropod exoskeletons, antlers, tusks, teeth and bird beaks...
  78. pmc Development of method for evaluating cell hardness and correlation between bacterial spore hardness and durability
    Koichi Nakanishi
    Laboratory for Core Technology, Development Kirin Beverage Co, Ltd, Technovillage 3F, 1 17 1 Namamugi, Yokohama 230 8628, Japan
    J Nanobiotechnology 10:22. 2012
    Despite the availability of conventional devices for making single-cell manipulations, determining the hardness of a single cell remains difficult...
  79. ncbi Preventive effect of iron gel with or without fluoride on bovine enamel erosion in vitro
    M G Bueno
    Department of Pediatric Dentistry, Orthodontics and Public Health, Bauru School of Dentistry, University of Sao Paulo, Bauru, SP, Brazil
    Aust Dent J 55:177-80. 2010
    ..The aim of this study was to evaluate the preventive effect in vitro of experimental gel containing iron and/or fluoride on the erosion of bovine enamel...
  80. ncbi CO2 laser improves 45S5 bioglass interaction with dentin
    A S Bakry
    Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, 1 5 45, Yushima, Bunkyo ku, Tokyo 113 8549, Japan
    J Dent Res 90:246-50. 2011
    ..The results showed that 45S5 bioglass could occlude the dentinal tubule orifices with calcium-phosphate crystals. The application of CO(2) laser potentially improved the mechanical organization of these crystals...
  81. ncbi A barley Hordoindoline mutation resulted in an increase in grain hardness
    Asuka Takahashi
    National Agricultural Research Center for Western Region WeNARC, 1 3 1 Senyu, Zentsuji, Kagawa 765 8508, Japan
    Theor Appl Genet 120:519-26. 2010
    Barley seed proteins, Hordoindolines, are homologues of wheat Puroindolines, which are associated with grain hardness. Barley Hordoindoline genes are known to comprise Hina and Hinb, and Hinb consists of two Hinb genes, Hinb-1 and Hinb-2...
  82. ncbi Reduced tissue hardness of trabecular bone is associated with severe osteoarthritis
    Enrico Dall'ara
    Laboratorio di Tecnologia Medica, Istituto Ortopedico Rizzoli, Bologna, Italy
    J Biomech 44:1593-8. 2011
    This study investigated whether changes in hardness of human trabecular bone are associated with osteoarthritis...
  83. ncbi Antibacterial and physical properties of resin modified glass-ionomers combined with chlorhexidine
    B J Sanders
    Department of Oral Facial Development, Indiana University School of Dentistry, Indianapolis 46202 5200, USA
    J Oral Rehabil 29:553-8. 2002
    ..The samples were tested for hardness, tensile strength and erosion at 24 h and 6-week intervals and for elution of CHX and antimicrobial activity ..
  84. ncbi The influence of chemical activation on hardness of dual-curing resin cements
    Renata Garcia Fonseca
    Department of Dental Materials and Prosthodontics, School of Dentistry of Araraquara, Sao Paulo State University
    Braz Oral Res 18:228-32. 2004
    ..evaluated the influence of chemical activation compared with dual-curing (chemical and light activation), on the hardness of four dual-curing resin cements...
  85. ncbi Surface hardness of light-activated resin composites cured by two different visible-light sources: an in vitro study
    S Sharkey
    Department of Restorative Dentistry, University Dental School and Hospital, National University of Ireland, Cork, Ireland
    Quintessence Int 32:401-5. 2001
    ..The plasma lamp yielded lower hardness values for all surfaces compared with the halogen source, but the size of the difference depended on the ..
  86. ncbi [Effect of the methods of photoactivation and insertion on the hardness of composite resins]
    Simonides Consani
    Faculdade de Odontologia de Piracicaba, Universidade Estadual de Campinas, Brasil
    Pesqui Odontol Bras 16:355-60. 2002
    The purpose of this study was to assess the effect of methods of photoactivation and insertion on the Knoop hardness of the Z100 and Alert composite resins. The specimens were confected in cavities measuring 4 x 4 mm...
  87. ncbi Effect of ethanol on the hardness and relaxation modulus of experimental photo-activated soft lining materials stored in aqueous solutions
    K Fujii
    Department of Biomaterials Science, Kagoshima University Dental School, Kagoshima, Japan
    J Oral Rehabil 29:770-6. 2002
    We studied changes in the hardness, relaxation modulus [Er(t)], and weight change ratio (Wc) of experimental photo-activated acrylic soft lining materials (EPLs) stored in three aqueous solutions [distilled water (DW), physiological ..
  88. ncbi Hardness in arthropod exoskeletons in the absence of transition metals
    B W Cribb
    Centre for Microscopy and Microanalysis, The University of Queensland, St Lucia, QLD 4072, Australia
    Acta Biomater 6:3152-6. 2010
    ..The larval jewel beetle, Pseudotaenia frenchi, demonstrates hardness in the cutting edge of the mandibles in excess of the mineralized carapace of stone crabs and compares favourably ..
  89. ncbi Flexural strength and hardness of reline and denture base acrylic resins after different exposure times of microwave disinfection
    Daniela Garcia Ribeiro
    Department of Dental Materials and Prosthodontics, Sao Paulo State University, UNESP, Araraquara Dental School, Sao Paulo, Brazil
    Quintessence Int 39:833-40. 2008
    To evaluate the effect of microwave disinfection on the flexural strength and Vickers hardness of 4 autopolymerized resins (Kooliner [K], Tokuso Rebase Fast [T], Ufi Gel Hard [U], and New Truliner [N]) and 1 denture base resin (Lucitone ..
  90. ncbi Hardening of a dual-cure resin cement using QTH and LED curing units
    Maria Jacinta Moraes Coelho Santos
    Department of Restorative Dentistry, University Western Ontario, London, Canada
    J Appl Oral Sci 18:110-5. 2010
    This study evaluated the surface hardness of a resin cement (RelyX ARC) photoactivated through indirect composite resin (Cristobal) disks of different thicknesses using either a light-emitting diode (LED) or quartz tungsten halogen (QTH) ..
  91. ncbi Extrinsic energy sources affect hardness through depth during set of a glass-ionomer cement
    Tony O'brien
    Biomaterials Unit, School of Dentistry, College of Medical and Dental Sciences, University of Birmingham, St Chads Queensway, Birmingham B4 6NN, UK
    J Dent 38:490-5. 2010
    To investigate the effect of various energy sources on the upper and lower surface hardness of a setting glass ionomer with various thicknesses.
  92. ncbi Curing efficiency of different polymerization methods through ceramic restorations
    H Jung
    Department of Operative Dentistry and Periodontology, University Clinics, Regensburg, Germany
    Clin Oral Investig 5:156-61. 2001
    ..polymerization methods through ceramic restorations by determination of the depth of cure and the universal hardness of a composite resin luting material...
  93. ncbi Time sequence of secondary mineralization and microhardness in cortical and cancellous bone from ewes
    Yohann Bala
    INSERM Unité 831, Faculte de Medecine Laennec, 69372 Lyon Cedex 08, France
    Bone 46:1204-12. 2010
    ..Finally, secondary mineralization in BSUs is completed after a period of 30 months. This observation should be taken into account for understanding the effects of long-term treatments of bone diseases...
  94. ncbi Compositional characteristics and hardness of acrylic and composite resin artificial teeth
    Paola G Loyaga-Rendon
    Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan
    J Prosthet Dent 98:141-9. 2007
    ..New types of artificial teeth are commercially available; however, evidence-based information regarding composition and properties is lacking...
  95. ncbi In situ evaluation of the remineralizing capacity of pit and fissure sealants containing amorphous calcium phosphate and/or fluoride
    Kélio Garcia Silva
    Post graduation Program in Pediatric Dentistry, UNESP Sao Paulo State University, Araçatuba Dental School, Sao Paulo, Brazil
    Acta Odontol Scand 68:11-8. 2010
    ..This in situ study evaluated the remineralizing potential of pit and fissure sealants containing amorphous calcium phosphate (ACP) and/or fluoride in artificially induced carious lesions on smooth enamel surfaces...
  96. ncbi Evaluation of human muscle hardness after dynamic exercise with ultrasound real-time tissue elastography: a feasibility study
    O Yanagisawa
    Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
    Clin Radiol 66:815-9. 2011
    ..feasibility of ultrasound real-time tissue elastography (RTE) for measuring exercise-induced changes in muscle hardness and to compare the findings of RTE with those of a tissue hardness meter for semi-quantitative assessment of the ..
  97. ncbi Meretrix lusoria--a natural biocomposite material: in situ analysis of hierarchical fabrication and micro-hardness
    Zhihong Zhu
    College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, People s Republic of China
    Micron 37:35-40. 2006
    ..TEM) and X-ray diffraction analyzer (XRD) combining with in situ texture decalcified technique and the micro-hardness of clam was determined, in order to understand the spatial relationship between the mineral phase and organic ..
  98. ncbi The effect of ceramic restoration shade and thickness on the polymerization of light- and dual-cure resin cements
    E Kilinc
    Nova Southeastern University College of Dental Medicine, Cariology and Restorative Dentistry, Fort Lauderdale, FL, USA
    Oper Dent 36:661-9. 2011
    ..The amount of light transmission through the restoration was also evaluated to correlate the results...
  99. ncbi Vertebral trabecular bone microscopic tissue elastic modulus and hardness do not change in ovariectomized rats
    X E Guo
    Department of Mechanical Engineering and Biomedical Engineering, Columbia University, New York, New York 10027, USA
    J Orthop Res 18:333-6. 2000
    ..bone area of the lumbar vertebrae (L4) was measured with scanning electron microscopy and the elastic modulus and hardness were determined with the nanoindentation technique...
  100. ncbi Enamel remineralization by fluoride-releasing materials: proposal of a pH-cycling model
    Eliana Rodrigues
    Department of Pediatric and Social Dentistry
    Braz Dent J 21:446-51. 2010
    ..0002), ∆ and μg F (r=0.9975; p=0.0000001) and between μg F/mm3 and μg F (r=0.9819; p=0.001). The pH-cycling model proposed was able to verify in vitro dose-response relationship of fluoride-releasing materials on remineralization...
  101. ncbi Dentin caries activity status related to hardness and elasticity
    Lei Zheng
    Division of Biomaterials and Bioengineering, Department of Preventive and Restorative Dental Sciences, University of California San Francisco, 707 Parnassus Avenue, San Francisco, CA 94143 0758, USA
    Eur J Oral Sci 111:243-52. 2003
    ..caries, the transparent zone occupied a larger portion of the lesion and the reduced elastic modulus was not significantly different from the underlying normal zone, although its hardness was lower than the apparently normal zone.

Research Grants63

  1. Role of Microstructure in Nanomechanical Behavior of Bone Tissue
    Marjolein C van der Meulen; Fiscal Year: 2010
    ..Hypothesis 1: Reduced bone mineral density or increased mineral crystal size reduces tissue elastic modulus and hardness. Specific Aim 1a: Mineral content will be reduced by 3 and 4 weeks of vitamin D-deficiency in growing rats...
  2. System for Decontaminating Well Water for Drinking
    GIRISH SRINIVAS; Fiscal Year: 2010
    ..natural and manmade sources, include significant quantities of magnesium and calcium chlorides (normal sources of hardness), heavy metals (e.g. lead), organic contaminants (e.g...
  3. The Mechanistic Control of Bone Matrix Material Properties by TGF-beta and Runx2
    TAMARA N ALLISTON; Fiscal Year: 2013
    DESCRIPTION (provided by applicant): Bone matrix is an organic and mineral composite that confers toughness and hardness to bone...
  4. NOVEL THERMAL REVERSIBLE POLYMER (TRG) FOR HUMAN ISLET ENCAPSULATION AND IMPLANTA
    David W Scharp; Fiscal Year: 2011
    ..Through several precise changes in the polymer, the temperature of cross linking, gel hardness, and permselectivity can be predictably controlled as required to encapsulate living cells successfully...
  5. Orthopedic Implants: Hypersonic Plasma Particle Deposition nano-porosity coatings
    Daniel A Fox; Fiscal Year: 2011
    ..Specific Aim 2: To evaluate wear resistance, along with other tribology characteristics (hardness, modulus, fracture toughness, surface smoothness, composition, thickness, bond strength) of the HPPD coated ..
  6. Biopsy Reduction of Force Tool for Improved Sample Collection and Minimize Patien
    MAUREEN MULVIHILL; Fiscal Year: 2009
    ..Bone density and hardness can also vary significantly among patients, making it difficult for the clinician to obtain a suitable core...
  7. Visible light-cured tissue engineering polymers filled with bioactive glass
    John C Mitchell; Fiscal Year: 2010
    ..TEM cannot be directly measured but can be indirectly determined by measuring degree of conversion (DC) and Knoop hardness (KHN) of the cured TEM. We will measure and compare DC and KHN of the various TEMs...
  8. Real-time Arterial Elasticity Imaging
    JAMES D HAMILTON; Fiscal Year: 2010
    ..PUBLIC HEALTH RELEVANCE: Artery hardness, or elasticity, has been shown to be a strong indicator of cardiovascular disease, peripheral vascular occlusive ..
  9. Pharmaceutical polymorphs: an electronic approach
    Mikhail Yu Antipin; Fiscal Year: 2010
    DESCRIPTION (provided by applicant): Crystalline polymorphism impacts many properties (stability, melting point, hardness, solubility, etc...
  10. Stability of cross-linked dentin and its clinical application
    Ana Karina B Bedran Russo; Fiscal Year: 2010
    ..Stiffness and hardness will be evaluated in specific sites using an atomic force microscope...
  11. IN VITRO INVESTIGATION OF SLIDING MECHANICS
    Robert Kusy; Fiscal Year: 2002
    ..The influence of four key biomaterial parameters (hardness, yield strength, elastic modulus, and surface roughness) on the resistance to sliding will also be measured by ..
  12. Novel Titanium Material for Orthopaedic Lumbar Implants
    STANLEY ABKOWITZ; Fiscal Year: 2004
    ..Tungsten and TiC additions to titanium significantly increase the combination of strength, hardness and wear resistance to levels not obtainable with conventional titanium alloys...
  13. Osseoinductive Surface Treatment for Dental Implants
    ZORAN MINEVSKI; Fiscal Year: 2005
    ..titanium hip implants, has developed an electrolytic phosphate surface treatment that offers improved surface hardness and corrosion resistance as well as significantly enhances implant contact with bone and marrow at the substrate...
  14. Mesodissection Device Phase II
    Nils B Adey; Fiscal Year: 2013
    ..development;and 2) design refinement primarily to the stage precision and blade pressure control, and improved hardness of xScisor blade and more refined fluid control...
  15. STRUCTURE & PROPERTIES OF HIGH PALLADIUM DENTAL ALLOYS
    WILLIAM BRANTLEY; Fiscal Year: 2000
    ..learn whether this constituent dominates all high-palladium alloys, to determine the fundamental mechanisms for hardness and strength of these alloys, and to obtain basic information about creep and distortion of castings during ..
  16. SCBA OXIMETRY FOR FIRE FIGHTER PHYSIOLOGIC MONITORING
    WILLIAM WIESMANN; Fiscal Year: 2005
    ..Once the units are fabricated, they will be evaluated under realistic field conditions to demonstrate hardness, functionality, and system reliability...
  17. REDUCTION OF POLYETHYLENE WEAR IN SURGICAL IMPLANTS
    Piran Sioshansi; Fiscal Year: 1990
    ..Corporation has shown that ion implantation of biologically inert species such as nitrogen and carbon increases hardness and reduces the friction of F-75 alloy...
  18. WATER SORPTION OF GLASSY DENTAL POLYMERS
    Robert Kusy; Fiscal Year: 1990
    ..Aim 2 is to determine how the amount of water taken up affects mechanical propteries such as hardness, elastic modulus, and tensile strength. Water uptake will be varied by control of relative humidity...
  19. NANOCRYSTALLINE COATING FOR UHMWPE PROSTHESES
    FEREYDOON NAMAVAR; Fiscal Year: 1999
    ..such as good adhesion at the interface, no adhesion (interaction) at the surface, low internal stress and high hardness. The objective of this program is solve the wear problems associated with UHMWPE by coating at room-temperature ..
  20. Radiation Hard X-Ray Detector for Image-Guided Proton Beam Cancer Therapy
    NICK SBROCKEY; Fiscal Year: 2009
    ..of advantages for use in radiation detectors, including high-sensitivity, low-noise and excellent radiation hardness, as will be detailed further in this proposal...
  21. STORAGE PHOSPHOR FILM FOR RADIATION THERAPY DOSIMETRY
    HUI HAROLD LI; Fiscal Year: 2013
    ..storage phosphor particle composition and chemical structure to maximize radiation sensitivity, radiation hardness, response uniformity, and signal stability...
  22. Characterization of the structure and function of DMP2
    Anne George; Fiscal Year: 2006
    ..The mineral phase in these tissues contributes to the hardness and comprehensive strength of the structure and also has a major physiological role as the metabolic reservoir of ..
  23. OPTIMIZATION OF SMALL PARTICLE COMPOSITES
    TRITALA VAIDYANATHAN; Fiscal Year: 1991
    ..The following properties will be evaluated: (1) compressive strengths, (2) Diametral tensile strenght, (3) Barcol hardness, (4) Depth of cure of visible light cured formulation, (5) wear, (6) polishability and (7) watersorption...
  24. KINETICS OF MINERALIZATION OF TEETH
    GEORGE NANCOLLAS; Fiscal Year: 2000
    ..phases will be investigated by scanning electron and field emission microscopy, X-ray microradiography, micro-hardness tests, polarized light microscopy, EDX, ESCA, and SIMS...
  25. Superhard Nanocrystalline Coated Prosthesis
    Eric Tobin; Fiscal Year: 2004
    ..for the first time, that nanocrystalline (3-40 nm grains) Co-Or deposited onto Co-Cr-Mo substrates possesses hardness close to that of some ceramics (18-26 GPa, 400% increase), without the associated problems with adhesion to ..
  26. Aging Venous Thrombi with Ultrasound Elasticity Imaging
    Jonathan Rubin; Fiscal Year: 2005
    ..The sine qua non of clot maturity is increasing hardness of thrombi, and in this regard, there exists an ultrasound technique, known as reconstructive ultrasound ..
  27. AL/ZIRCONIA COMPOSITE FILM FOR ORTHOPEDIC PROSTHESES
    Stephen Bunker; Fiscal Year: 1999
    ..An alumina-zirconia composite is proposed as a new material to serve as the ceramic coating. With the hardness of alumina and the toughening effects of zirconia, the coating promises to be superior to either material alone...
  28. GRADED FILMS ON CO-CR FOR REDUCED UHMWPE WEAR
    FEREYDOON NAMAVAR; Fiscal Year: 2000
    ..film will be composed of ultra-fine grains (nanocrystallites of TiN and Cr), which significantly increase film hardness and ductility...
  29. ROLE OF DENTIN PHOSPHOPROTEIN IN DENTIN REMINERALIZATION
    BRIAN CLARKSON; Fiscal Year: 2001
    ..SEM, TEM and microradiography and the mechanical properties analyzed by bulk compression tests and local hardness and stiffness using atomic force microscopy...
  30. New ceramic surgical knife improves surgical outcome
    RICHARD MCPHILLIPS; Fiscal Year: 2006
    ..e. ophthalmologic surgical knives) will be harder than polycrystalline diamond and within 15% of the theoretical hardness of diamond materials used today...
  31. POLYMERIC PROTECTION OF IMPLANTABLE MICRO-ELECTRONICS
    Philip Troyk; Fiscal Year: 1990
    ..Material parameters such as adhesion, hardness, permeability, elongation, and ear resistance will be correlated with performance. 2...
  32. NOVEL MOLECULAR COMPOSITE DENTAL MATERIALS
    Yen Wei; Fiscal Year: 2006
    ..thermally or photochemically, these molecular composite/hybrid materials exhibit tailored combinations of the hardness of inorganic glasses and the toughness of organic polymers...
  33. DESIGNED ENAMEL DEFECTS
    Shane White; Fiscal Year: 1999
    ..Specific aims are: 1) To measure and compare enamel fracture toughness and hardness between normal and transgenic mice, 2) To measure and compare DEJ interfacial fracture toughness between normal ..
  34. NEUTRON DETECTORS FOR MACROMOLECULAR CRYSTALLOGRAPHY
    KRISHNA MANDAL; Fiscal Year: 2004
    ..high detection efficiency, fast response and reset time, excellent gamma discrimination, and high radiation hardness. The proposed detector would be inexpensive for industrial mass production...
  35. CoCr/TiN Superlattice Hard Coatings for Spinal Implants
    Jason Burns; Fiscal Year: 2007
    ..In addition to improved hardness, superlattices exhibit an unusual wear mechanism which controls defect propagation and reduces the size of wear ..
  36. Nanocrystalline Zirconia Orthopedic Coating for Reduced Poyethylene Wear
    Jason Burns; Fiscal Year: 2007
    ..Due to grain size in the nano-scale, Spire's zirconia will exhibit extraordinary hardness and a super-plasticity that will further increase toughness...
  37. CERAMIC BLADES FOR MICROSURGICAL INSTRUMENTS
    DAVID PALAITH; Fiscal Year: 1993
    ..Because of the higher hardness and chemical inertness of ceramic materials, ceramic blades have the potential to reduce wear by one hundred-fold ..
  38. DEVELOPMENT OF SYNTHETIC POLYURETHANE MATERIALS
    Michael Szycher; Fiscal Year: 1999
    ..They propose to synthesize large quantities (1000 lbs of each polymer hardness) of well characterized polymers...
  39. NEW METHACRYLIC SILOXANE RESIN BASED SOFT DENTURE LINERS
    JUEY LAI; Fiscal Year: 2000
    ..In Phase I, the physical properties of the new materials were studied as functions of material formulations. Hardness, elongation, tensile strength, tear strength, bonding strength to denture base polymers, water sorption and ..
  40. CASE CONTROL STUDY OF FOOTWEAR AND FALLS IN OLDER ADULTS
    Thomas Koepsell; Fiscal Year: 1999
    ..visit will include measurements of coefficient of friction, heel lateral stability, sole flexibility, midsole hardness, and contact area...
  41. Development Of A Pulsed Light Emitting Diode Dental Photocuring System
    Jack Zhou; Fiscal Year: 2007
    ..It was found that the pulsed LED light yields 10-12% more curing depth and better surface hardness than that obtained by a continuous wave (CW) light with same exposure energy...
  42. THERMO-TACTILE AND INTERACTIONS
    JOSEPH STEVENS; Fiscal Year: 1990
    ..body surface, and various physical properties of the skin such as the coefficient of friction, skin blood flow, hardness, and elasticity...
  43. LOW POWER, HIGH SENSITIVITY, ELEC OLFACTORY SENSORS
    Stefan Vasile; Fiscal Year: 1999
    ..Fluorescence based olfactory sensors offer stable calibration, in-vivo operation, radiation hardness, and high information content...
  44. OXIDE GLASS INFRARED FIBER FOR ER--YAG LASER SURGERY
    Danh Tran; Fiscal Year: 2000
    ..Phase II of the project seeks to improve fiber strength by optimizing glass hardness and drawing the fiber with better coatings...
  45. Nanodevice for Digital Imaging of Palpable Structure at Human-Finger Resolution f
    Ravi Saraf; Fiscal Year: 2009
    ..to CBE, a quantitative image of the nodular structure of the breast and sentinel lymph node scoring of the local hardness will be obtained...
  46. MR Elastrography for Breast Cancer Detection
    ROBERT KLINE SCHODER; Fiscal Year: 2003
    ..One physical property that clearly distinguishes healthy from cancerous tissue is mechanical stiffness (hardness). For this reason, palpation has long been used for early screening...
  47. IMPROVING PROSTHETIC PREHENSION
    LAWRENCE CARLSON; Fiscal Year: 1993
    ..to any type of prehensor, including anthropomorphic fingers with nonlinearly compliant structure and variable hardness finger materials. 4...
  48. Curing models for photoactivated resin composites
    Scott Prahl; Fiscal Year: 2009
    ..e., degree of conversion and hardness) and strong adhesion at the tooth interface...
  49. ORGANOSILICON DENTAL COMPOSITE OF RESTORATIVE MATERIALS
    JUEY LAI; Fiscal Year: 1990
    ..The composites will be evaluated in vitro guided by ADA specification No. 27. Hardening time, hardness, diametral tensile strength, and water sorption of the composites will be determined and compared with those of ..
  50. BIOMIMETICALLY DESIGNED INTERFACES & COMPOSITES
    JOHN MECHOLSKY; Fiscal Year: 2004
    ..stone crab chelae and mollusk shell in order to determine the mechanical properties such as fracture toughness, hardness, strength and interface integrity as a function of the micro-structure and macro-structure...
  51. Development of a Pulsed LED Dental Photocuring System
    NOUREDDINE MELIKECHI; Fiscal Year: 2002
    ..a pulsed LED curing system and investigate the curing characteristics (depth of cure, degree of conversion of monomers to polymer, hardness, time of exposure, thermal load) of Dental resins cured using pulsed LEDs.
  52. MECHANICAL PROPERTIES OF RODENT BONES
    Guigen Zhang; Fiscal Year: 1999
    ..displacement-to- failure, strength, modulus, visoelastic properties, hysteresis, creep displacement, micro-hardness, local surface stiffness, and surface adhesion properties...
  53. Novel Nanostructured Dental Glass-Ionomers for Advanced Dental Restoratives
    Dong Xie; Fiscal Year: 2008
    ..Further, nanofiller-strengthened GIC showed significantly improved hardness and wear-resistance...
  54. Novel Amino Acid-Based Glass-Ionomer Biomaterials
    Dong Xie; Fiscal Year: 2005
    ..abstract_text> ..
  55. Mineral and Mechanical Properties of Bone
    Sarandeep Huja; Fiscal Year: 2005
    ..Future interventional studies will examine the mechanisms for the initial and the long-term adaptive response in material properties of bone. ..
  56. Methyl Mercury Evaluation in Dental Waste Water
    James Drummond; Fiscal Year: 2003
    ..Hypothesis: Element mercury released in DWW is converted to Hg(lI) and then in more limited amounts to methyl-mercury by specific biofilm bacterial species in the Dental sewage pipes. ..
  57. High Toughness Textured Ceramics for Biomedical Use
    Isabelle Denry; Fiscal Year: 2007
    ..Potential applications include dental restorations, dental implant superstructures, and bone replacement implants. ..
  58. Dentino-enamel junction genetic-structural correlation
    Shane White; Fiscal Year: 2005
    ..Specific aims are: 1) To measure and compare enamel fracture toughness and hardness in three dimensions of normal wild type mice to that of the transgenic amelogenin self assembly defect mice; 2) ..
  59. REDUCTION OF COMPOSITE POLYMERIZATION CONTRACTION STRESS
    RONALD SAKAGUCHI; Fiscal Year: 2002
    ..Clinically significant reductions in contraction strain and stress will be produced which will improve the function and longevity of resin composite restorations. ..
  60. ENAMEL MATRIX PROTEIN INTERACTION
    MICHAEL LANSDELL PAINE; Fiscal Year: 2010
    ..For tooth regeneration to become a reality, the protein- protein interactions involving the key dental proteins must be known and understood. ..
  61. The Role of P4H in Tissue-Titanium Integration
    Takahiro Ogawa; Fiscal Year: 2006
    ..in mineralized tissue on titanium is responsible for the observed collagen deposition dynamics and enhanced hardness and interfacial adhesion of the tissue on titanium...
  62. Effect of Femoral Stem Design om Cement Mantle Failure
    Amos Race; Fiscal Year: 2006
    ..Should these aims be met, the proposed model will be of great use in pre-clinical testing of novel cemented stem designs. ..
  63. PREVENTION OF DENTAL CARIES
    Shozo Takagi; Fiscal Year: 2005
    ....