Role of indenter material and size in veneer failure of brittle layer structures

Sanjit Bhowmick, Juan José Meléndez-Martínez, Ilja Hermann, Yu Zhang, Brian R. Lawn

Research output: Contribution to journalArticle

Abstract

The roles of indenter material and size in the failure of brittle veneer layers in all-ceramic crown-like structures are studied. Glass veneer layers 1 mm thick bonded to alumina layers 0.5 mm thick on polycarbonate bases (representative of porcelain/ceramic-core/dentin) are subject to cyclic contact loading with spherical indenters in water (representative of occlusal biting environment). Two indenter materials - glass and tungsten carbide - and three indenter radii - 1.6, 5.0, and 12.5 mm - are investigated in the tests. A video camera is used to follow the near-contact initiation and subsequent downward propagation of cone cracks through the veneer layer to the core interface, at which point the specimen is considered to have failed. Both indenter material and indenter radius have some effect on the critical loads to initiate cracks within the local Hertzian contact field, but the influence of modulus is weaker. The critical loads to take the veneer to failure are relatively insensitive to either of these indenter variables, since the bulk of the cone crack propagation takes place in the contact far field. 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.

Original languageEnglish (US)
Pages (from-to)253-259
Number of pages7
JournalJournal of Biomedical Materials Research - Part B Applied Biomaterials
Volume82
Issue number1
DOIs
StatePublished - Jul 2007

Fingerprint

Veneers
polycarbonate
Cones
Cracks
Glass
Dental Porcelain
Cyclic loads
Porcelain
Aluminum Oxide
Tungsten carbide
Video cameras
Polycarbonates
Crack propagation
Alumina
Fatigue of materials
Water

Keywords

  • Cone cracks
  • Cyclic fatigue
  • Dental crowns
  • Indenter material
  • Indenter size

ASJC Scopus subject areas

  • Biomedical Engineering
  • Biomaterials

Cite this

Role of indenter material and size in veneer failure of brittle layer structures. / Bhowmick, Sanjit; Meléndez-Martínez, Juan José; Hermann, Ilja; Zhang, Yu; Lawn, Brian R.

In: Journal of Biomedical Materials Research - Part B Applied Biomaterials, Vol. 82, No. 1, 07.2007, p. 253-259.

Research output: Contribution to journalArticle

Bhowmick, Sanjit ; Meléndez-Martínez, Juan José ; Hermann, Ilja ; Zhang, Yu ; Lawn, Brian R. / Role of indenter material and size in veneer failure of brittle layer structures. In: Journal of Biomedical Materials Research - Part B Applied Biomaterials. 2007 ; Vol. 82, No. 1. pp. 253-259.
@article{6e14350b43fc4c85a2fa096f6e219e53,
title = "Role of indenter material and size in veneer failure of brittle layer structures",
abstract = "The roles of indenter material and size in the failure of brittle veneer layers in all-ceramic crown-like structures are studied. Glass veneer layers 1 mm thick bonded to alumina layers 0.5 mm thick on polycarbonate bases (representative of porcelain/ceramic-core/dentin) are subject to cyclic contact loading with spherical indenters in water (representative of occlusal biting environment). Two indenter materials - glass and tungsten carbide - and three indenter radii - 1.6, 5.0, and 12.5 mm - are investigated in the tests. A video camera is used to follow the near-contact initiation and subsequent downward propagation of cone cracks through the veneer layer to the core interface, at which point the specimen is considered to have failed. Both indenter material and indenter radius have some effect on the critical loads to initiate cracks within the local Hertzian contact field, but the influence of modulus is weaker. The critical loads to take the veneer to failure are relatively insensitive to either of these indenter variables, since the bulk of the cone crack propagation takes place in the contact far field. 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.",
keywords = "Cone cracks, Cyclic fatigue, Dental crowns, Indenter material, Indenter size",
author = "Sanjit Bhowmick and Mel{\'e}ndez-Mart{\'i}nez, {Juan Jos{\'e}} and Ilja Hermann and Yu Zhang and Lawn, {Brian R.}",
year = "2007",
month = "7",
doi = "10.1002/jbm.b.30728",
language = "English (US)",
volume = "82",
pages = "253--259",
journal = "Journal of Biomedical Materials Research",
issn = "1549-3296",
publisher = "John Wiley and Sons Inc.",
number = "1",

}

TY - JOUR

T1 - Role of indenter material and size in veneer failure of brittle layer structures

AU - Bhowmick, Sanjit

AU - Meléndez-Martínez, Juan José

AU - Hermann, Ilja

AU - Zhang, Yu

AU - Lawn, Brian R.

PY - 2007/7

Y1 - 2007/7

N2 - The roles of indenter material and size in the failure of brittle veneer layers in all-ceramic crown-like structures are studied. Glass veneer layers 1 mm thick bonded to alumina layers 0.5 mm thick on polycarbonate bases (representative of porcelain/ceramic-core/dentin) are subject to cyclic contact loading with spherical indenters in water (representative of occlusal biting environment). Two indenter materials - glass and tungsten carbide - and three indenter radii - 1.6, 5.0, and 12.5 mm - are investigated in the tests. A video camera is used to follow the near-contact initiation and subsequent downward propagation of cone cracks through the veneer layer to the core interface, at which point the specimen is considered to have failed. Both indenter material and indenter radius have some effect on the critical loads to initiate cracks within the local Hertzian contact field, but the influence of modulus is weaker. The critical loads to take the veneer to failure are relatively insensitive to either of these indenter variables, since the bulk of the cone crack propagation takes place in the contact far field. 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.

AB - The roles of indenter material and size in the failure of brittle veneer layers in all-ceramic crown-like structures are studied. Glass veneer layers 1 mm thick bonded to alumina layers 0.5 mm thick on polycarbonate bases (representative of porcelain/ceramic-core/dentin) are subject to cyclic contact loading with spherical indenters in water (representative of occlusal biting environment). Two indenter materials - glass and tungsten carbide - and three indenter radii - 1.6, 5.0, and 12.5 mm - are investigated in the tests. A video camera is used to follow the near-contact initiation and subsequent downward propagation of cone cracks through the veneer layer to the core interface, at which point the specimen is considered to have failed. Both indenter material and indenter radius have some effect on the critical loads to initiate cracks within the local Hertzian contact field, but the influence of modulus is weaker. The critical loads to take the veneer to failure are relatively insensitive to either of these indenter variables, since the bulk of the cone crack propagation takes place in the contact far field. 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.

KW - Cone cracks

KW - Cyclic fatigue

KW - Dental crowns

KW - Indenter material

KW - Indenter size

UR - http://www.scopus.com/inward/record.url?scp=34347360629&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34347360629&partnerID=8YFLogxK

U2 - 10.1002/jbm.b.30728

DO - 10.1002/jbm.b.30728

M3 - Article

C2 - 17183566

AN - SCOPUS:34347360629

VL - 82

SP - 253

EP - 259

JO - Journal of Biomedical Materials Research

JF - Journal of Biomedical Materials Research

SN - 1549-3296

IS - 1

ER -