On the mechanistic role of the dentin-enamel junction in preventing the fracture of human teeth Metadata

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Title

  • Main Title On the mechanistic role of the dentin-enamel junction in preventing the fracture of human teeth

Creator

  • Author: Imbeni, V.
    Creator Type: Personal
  • Author: Kruzic, J.J.
    Creator Type: Personal
  • Author: Marshall, G.W.
    Creator Type: Personal
  • Author: Marshall, S.J.
    Creator Type: Personal
  • Author: Ritchie, R.O.
    Creator Type: Personal

Contributor

  • Sponsor: United States. Department of Energy. Division of Materials Sciences and Engineering.
    Contributor Type: Organization
    Contributor Info: USDOE Director. Office of Science. Office of Basic Energy Sciences. Materials Science and Engineering Division
  • Sponsor: National Institute of Dental and Craniofacial Research (U.S.)
    Contributor Type: Organization
    Contributor Info: National Institutes of Health. National Institute of Dental and Craniofacial Research; Grant R01 DE 13029 (United States)

Publisher

  • Name: Lawrence Berkeley National Laboratory
    Place of Publication: Berkeley, California
    Additional Info: Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (United States)

Date

  • Creation: 2004-09-01

Language

  • English

Description

  • Content Description: The dentin-enamel junction (DEJ), which is the interface between the dentin and outer enamel coating in teeth, is known for its unique biomechanical properties that provide a crack-arrest barrier for flaws formed in the brittle enamel. In this work, we re-examine how cracks propagate in the proximity of the DEJ, and specifically quantify, using interfacial fracture mechanics, the fracture toughness of the DEJ region. Additionally, we show that the vital function of the DEJ, in preventing cracks formed in enamel from traversing the interface and causing catastrophic tooth fractures, is not necessarily associated with the crack-arrest capabilities of the DEJ itself, but rather with the development of crack-tip shielding, primarily from uncracked-ligament bridging, in the mantle dentin adjacent to the DEJ. Measurements of the toughness of the DEJ region give estimates of G{sub c} {approx} 115 J/m{sup 2}, i.e., {approx}5 to 10 times higher than enamel and {approx}75 percent of that of dentin.
  • Physical Description: vp.

Subject

  • Keyword: Coatings
  • Keyword: Shielding
  • STI Subject Categories: 36 Materials Science
  • Keyword: Fracture Mechanics
  • Keyword: Dentin
  • Keyword: Fractures
  • Keyword: Teeth
  • Keyword: Defects
  • Keyword: Enamels
  • Keyword: Fracture Properties

Source

  • Journal Name: Nature Materials; Journal Volume: 4; Other Information: Submitted to Nature Materials: Volume 4; Journal Publication Date: 03/2005

Collection

  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI

Institution

  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Article

Format

  • Text

Identifier

  • Report No.: LBNL-56275
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 837935
  • Grant Number: R01 DE 13029
  • Archival Resource Key: ark:/67531/metadc785232

Note

  • Display Note: OSTI as DE00837935