B R Lawn

Summary

Affiliation: National Institute of Standards and Technology
Country: USA

Publications

  1. ncbi request reprint Materials design in the performance of all-ceramic crowns
    Brian R Lawn
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Building 301, Shipping and Receiving, Gaithersburg, MD 20899 8500, USA
    Biomaterials 25:2885-92. 2004
  2. ncbi request reprint Use of contact testing in the characterization and design of all-ceramic crownlike layer structures: a review
    B R Lawn
    National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    J Prosthet Dent 86:495-510. 2001
  3. doi request reprint Predicting failure in mammalian enamel
    Brian R Lawn
    Ceramics Division, National Institute of Standards and Technology, Gaithersburg, USA
    J Mech Behav Biomed Mater 2:33-42. 2009
  4. ncbi request reprint Materials design of ceramic-based layer structures for crowns
    B R Lawn
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899 8500, USA
    J Dent Res 81:433-8. 2002
  5. doi request reprint Analysis of fracture and deformation modes in teeth subjected to occlusal loading
    Brian R Lawn
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8520, USA
    Acta Biomater 5:2213-21. 2009
  6. ncbi request reprint Veneer vs. core failure in adhesively bonded all-ceramic crown layers
    J J W Lee
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8520, Gaithersburg, MD 20899 8520, USA
    J Dent Res 87:363-6. 2008
  7. ncbi request reprint Role of microstructure on contact damage and strength degradation of micaceous glass-ceramics
    I M Peterson
    Materials Science and Engineering Laboratory, National Institue of Standards and Technology, Gaithersburg, Maryland, USA
    Dent Mater 14:80-9. 1998
  8. doi request reprint Fracture modes in human teeth
    J J W Lee
    Ceramics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 8520, USA
    J Dent Res 88:224-8. 2009
  9. ncbi request reprint Damage modes in dental layer structures
    Y G Jung
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    J Dent Res 78:887-97. 1999
  10. ncbi request reprint Deep-penetrating conical cracks in brittle layers from hydraulic cyclic contact
    Yu Zhang
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    J Biomed Mater Res B Appl Biomater 73:186-93. 2005

Collaborators

Detail Information

Publications25

  1. ncbi request reprint Materials design in the performance of all-ceramic crowns
    Brian R Lawn
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Building 301, Shipping and Receiving, Gaithersburg, MD 20899 8500, USA
    Biomaterials 25:2885-92. 2004
    ..Critical loads depend strongly (quadratically) on crown net thickness. The analytic relations provide a sound basis for the materials design of next-generation dental crowns...
  2. ncbi request reprint Use of contact testing in the characterization and design of all-ceramic crownlike layer structures: a review
    B R Lawn
    National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
    J Prosthet Dent 86:495-510. 2001
    ..Such an approach may be used to establish a scientific, materials-based foundation for designing next-generation crown layer structures...
  3. doi request reprint Predicting failure in mammalian enamel
    Brian R Lawn
    Ceramics Division, National Institute of Standards and Technology, Gaithersburg, USA
    J Mech Behav Biomed Mater 2:33-42. 2009
    ..Implications in dentistry and evolutionary biology are discussed...
  4. ncbi request reprint Materials design of ceramic-based layer structures for crowns
    B R Lawn
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, MD 20899 8500, USA
    J Dent Res 81:433-8. 2002
    ..The study provides simple a priori predictions of failure in prospective ceramic/substrate bilayers and ranks ceramic materials for best clinical performance...
  5. doi request reprint Analysis of fracture and deformation modes in teeth subjected to occlusal loading
    Brian R Lawn
    National Institute of Standards and Technology, Gaithersburg, MD 20899 8520, USA
    Acta Biomater 5:2213-21. 2009
    ..This accounts for the remarkable damage tolerance of natural teeth. The equations may enable basic predictions of tooth responses for humans and animals under a variety of specified dietary and functional conditions...
  6. ncbi request reprint Veneer vs. core failure in adhesively bonded all-ceramic crown layers
    J J W Lee
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, 100 Bureau Drive, Mail Stop 8520, Gaithersburg, MD 20899 8520, USA
    J Dent Res 87:363-6. 2008
    ..Veneer cracking did depend on adhesive thickness. However, no significant differences in critical loads for veneer cracking were observed for specimens containing alumina or zirconia cores...
  7. ncbi request reprint Role of microstructure on contact damage and strength degradation of micaceous glass-ceramics
    I M Peterson
    Materials Science and Engineering Laboratory, National Institue of Standards and Technology, Gaithersburg, Maryland, USA
    Dent Mater 14:80-9. 1998
    ..A series of micaceous glass-ceramics crystallized from a common glass composition, using heat treatments to increase the diameter and aspect ratio of mica platelets, is used as a model ceramic system...
  8. doi request reprint Fracture modes in human teeth
    J J W Lee
    Ceramics Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 8520, USA
    J Dent Res 88:224-8. 2009
    ..At higher loads, additional crack modes--such as enamel chipping and delamination--began to manifest themselves, leading to more comprehensive failure of the tooth structure...
  9. ncbi request reprint Damage modes in dental layer structures
    Y G Jung
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    J Dent Res 78:887-97. 1999
    ..Finite element modeling is used to evaluate the tensile stresses responsible for the different crack types. The clinical relevance of these observations is considered...
  10. ncbi request reprint Deep-penetrating conical cracks in brittle layers from hydraulic cyclic contact
    Yu Zhang
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    J Biomed Mater Res B Appl Biomater 73:186-93. 2005
    ..This new type of cone cracking may limit dental crown veneer lifetimes under occlusal fatigue conditions, especially in thicker layers, where competing modes-such as undersurface radial cracks-are suppressed...
  11. ncbi request reprint Fatigue and damage tolerance of Y-TZP ceramics in layered biomechanical systems
    Yu Zhang
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    J Biomed Mater Res B Appl Biomater 71:166-71. 2004
    ....
  12. ncbi request reprint Role of substrate material in failure of crown-like layer structures
    Jae Won Kim
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 8500, USA
    J Biomed Mater Res B Appl Biomater 81:305-11. 2007
    ..Finite element analysis is used to determine stress distributions pertinent to the observed fracture modes. It is suggested that stiffer substrate materials offer potential for improved crown lifetime in dental practice...
  13. doi request reprint Properties of tooth enamel in great apes
    James J W Lee
    Ceramics Division, National Institute of Standards and Technology, Gaithersburg, MD, USA
    Acta Biomater 6:4560-5. 2010
    ..The results suggest that differences in load-bearing capacity of molar teeth in primates are less a function of underlying material properties than of morphology...
  14. ncbi request reprint Effect of sandblasting on the long-term performance of dental ceramics
    Yu Zhang
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 8500, USA
    J Biomed Mater Res B Appl Biomater 71:381-6. 2004
    ..However, the shift is considerably greater in the cyclic data, suggesting some mechanically assisted growth of the sandblast flaws. These results have implications in the context of lifetimes of dental crowns...
  15. ncbi request reprint Transverse fracture of brittle bilayers: relevance to failure of all-ceramic dental crowns
    Jae Won Kim
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 8500, USA
    J Biomed Mater Res B Appl Biomater 79:58-65. 2006
    ..These latter cracks, because of their lack of containment within the core layer, are regarded as especially dangerous. Implications concerning the design of optimal dental crowns in relation to materials optimization are considered...
  16. ncbi request reprint Characterization of damage modes in dental ceramic bilayer structures
    Yan Deng
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
    J Biomed Mater Res 63:137-45. 2002
    ..The utility of such analyses in the design of ceramic/substrate bilayer systems for optimal resistance to lifetime-threatening damage is discussed...
  17. ncbi request reprint Role of core support material in veneer failure of brittle layer structures
    Ilja Hermann
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 8500, USA
    J Biomed Mater Res B Appl Biomater 82:115-21. 2007
    ..Consideration is also given to the roles of interface strength and residual thermal expansion mismatch stresses in relation to the different joining methods...
  18. ncbi request reprint Role of indenter material and size in veneer failure of brittle layer structures
    Sanjit Bhowmick
    Materials Science and Engineering Laboratory, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 8500, USA
    J Biomed Mater Res B Appl Biomater 82:253-9. 2007
    ..Clinical implications of the results are considered, including the issue of single-cycle overload versus low-load cyclic fatigue and changes in fracture mode with loading conditions...
  19. ncbi request reprint Fracture of ceramic/ceramic/polymer trilayers for biomechanical applications
    Yan Deng
    Department of Materials and Nuclear Engineering, University of Maryland, College Park, Maryland 20742 2115, USA
    J Biomed Mater Res A 67:828-33. 2003
    ..Relevance of the analysis to dental crowns and other biomechanical applications is a central theme of the study...
  20. ncbi request reprint Margin failures in crown-like brittle structures: off-axis loading
    Chris Ford
    School of Mechanical Engineering, The University of Western Australia, Crawley, Western Australia 6009, Australia
    J Biomed Mater Res B Appl Biomater 85:23-8. 2008
    ..Finite element modeling is used to show that off-axis loading dramatically increases the tensile stresses at the near-side dome margin, strongly diminishing the loads required to generate the lunar fracture mode...
  21. ncbi request reprint Damage accumulation and fatigue life of particle-abraded ceramics
    Yu Zhang
    Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, New York 10010, USA
    Int J Prosthodont 19:442-8. 2006
    ..This investigation compared initial and fatigue strengths of particle-abraded ceramics to those of as-polished alumina and zirconia ceramics in crown-like layer structures...
  22. ncbi request reprint Contact damage in brittle coating layers: influence of surface curvature
    Tarek Qasim
    School of Mechanical Engineering, The University of Western Australia, Crawley, W A 6009, Australia
    J Biomed Mater Res B Appl Biomater 73:179-85. 2005
    ..Implications concerning the design of ceramic-based dental crowns are considered...
  23. ncbi request reprint Margin failures in brittle dome structures: relevance to failure of dental crowns
    Tarek Qasim
    School of Mechanical Engineering, The University of Western Australia, Crawley, Western Australia 6009, Australia
    J Biomed Mater Res B Appl Biomater 80:78-85. 2007
    ..Finite element analysis is used to determine the basic stress states within the dome structures, and to confirm a shift in maximum tensile stress from the near-contact area to the dome sides with more compliant indenters...
  24. ncbi request reprint Effect of off-axis concentrated loading on failure of curved brittle layer structures
    Tarek Qasim
    School of Mechanical Engineering, The University of Western Australia, Crawley, W A 6009, Australia
    J Biomed Mater Res B Appl Biomater 76:334-9. 2006
    ..Finite element calculations are used to evaluate stress states in the specimens for correlation with the experimental data...
  25. ncbi request reprint Fatigue sensitivity of Y-TZP to microscale sharp-contact flaws
    Yu Zhang
    New York University College of Dentistry, 345 East 24th Street, New York, New York 10010, USA
    J Biomed Mater Res B Appl Biomater 72:388-92. 2005
    ..1 N to 1 N, attesting to the highly deleterious nature of sharp particulate contacts. The mechanism of fatigue is considered in terms of microcrack evolution within the indentation damage zone...