Fracture of porcelain-veneered structures in fatigue

B. Kim, Yu Zhang, M. Pines, V. P. Thompson

Research output: Contribution to journalArticle

Abstract

Porcelain-veneered crowns are widely used in modern dentistry, and their fracture remains problematic, especially in all-ceramic systems. We hypothesized that substructure properties have a significant effect on the longevity of porcelain-veneered crowns. Flat porcelain/metal or porcelain/ceramic structures were cemented to dentin-like composite, and a mouth-motion cyclic load of 200 N was delivered by means of a tungsten carbide spherical indenter (r = 3.18 mm), emulating occlusal loading on crowns supported by dentin. Findings indicated that porcelain on a low-hardness gold-infiltrated alloy was vulnerable to both occlusal surface contact damage and porcelain lower surface radial fracture, while porcelain on a higher-hardness palladium-silver alloy fractured chiefly from occlusal surface damage. The advantage of a high-modulus metal substructure was less pronounced. Fracture in the porcelain/zirconia system was limited to surface damage in the veneer layer, similar to that in the porcelain/palladium- silver system. Bulk fracture, observed in veneered alumina layers, was not found for zirconia.

Original languageEnglish (US)
Pages (from-to)142-146
Number of pages5
JournalJournal of Dental Research
Volume86
Issue number2
DOIs
StatePublished - Feb 2007

Fingerprint

Dental Porcelain
Fatigue
Crowns
Hardness
Palladium
Ceramics
Dentin
Silver
Metals
Gold Alloys
Aluminum Oxide
Dentistry
Mouth

Keywords

  • Ceramic
  • Contact fatigue
  • Crowns
  • Fracture
  • Porcelain-veneered structures

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Fracture of porcelain-veneered structures in fatigue. / Kim, B.; Zhang, Yu; Pines, M.; Thompson, V. P.

In: Journal of Dental Research, Vol. 86, No. 2, 02.2007, p. 142-146.

Research output: Contribution to journalArticle

Kim, B. ; Zhang, Yu ; Pines, M. ; Thompson, V. P. / Fracture of porcelain-veneered structures in fatigue. In: Journal of Dental Research. 2007 ; Vol. 86, No. 2. pp. 142-146.
@article{5f244f61e499401f865d1171253b49b8,
title = "Fracture of porcelain-veneered structures in fatigue",
abstract = "Porcelain-veneered crowns are widely used in modern dentistry, and their fracture remains problematic, especially in all-ceramic systems. We hypothesized that substructure properties have a significant effect on the longevity of porcelain-veneered crowns. Flat porcelain/metal or porcelain/ceramic structures were cemented to dentin-like composite, and a mouth-motion cyclic load of 200 N was delivered by means of a tungsten carbide spherical indenter (r = 3.18 mm), emulating occlusal loading on crowns supported by dentin. Findings indicated that porcelain on a low-hardness gold-infiltrated alloy was vulnerable to both occlusal surface contact damage and porcelain lower surface radial fracture, while porcelain on a higher-hardness palladium-silver alloy fractured chiefly from occlusal surface damage. The advantage of a high-modulus metal substructure was less pronounced. Fracture in the porcelain/zirconia system was limited to surface damage in the veneer layer, similar to that in the porcelain/palladium- silver system. Bulk fracture, observed in veneered alumina layers, was not found for zirconia.",
keywords = "Ceramic, Contact fatigue, Crowns, Fracture, Porcelain-veneered structures",
author = "B. Kim and Yu Zhang and M. Pines and Thompson, {V. P.}",
year = "2007",
month = "2",
doi = "10.1177/154405910708600207",
language = "English (US)",
volume = "86",
pages = "142--146",
journal = "Journal of Dental Research",
issn = "0022-0345",
publisher = "SAGE Publications Inc.",
number = "2",

}

TY - JOUR

T1 - Fracture of porcelain-veneered structures in fatigue

AU - Kim, B.

AU - Zhang, Yu

AU - Pines, M.

AU - Thompson, V. P.

PY - 2007/2

Y1 - 2007/2

N2 - Porcelain-veneered crowns are widely used in modern dentistry, and their fracture remains problematic, especially in all-ceramic systems. We hypothesized that substructure properties have a significant effect on the longevity of porcelain-veneered crowns. Flat porcelain/metal or porcelain/ceramic structures were cemented to dentin-like composite, and a mouth-motion cyclic load of 200 N was delivered by means of a tungsten carbide spherical indenter (r = 3.18 mm), emulating occlusal loading on crowns supported by dentin. Findings indicated that porcelain on a low-hardness gold-infiltrated alloy was vulnerable to both occlusal surface contact damage and porcelain lower surface radial fracture, while porcelain on a higher-hardness palladium-silver alloy fractured chiefly from occlusal surface damage. The advantage of a high-modulus metal substructure was less pronounced. Fracture in the porcelain/zirconia system was limited to surface damage in the veneer layer, similar to that in the porcelain/palladium- silver system. Bulk fracture, observed in veneered alumina layers, was not found for zirconia.

AB - Porcelain-veneered crowns are widely used in modern dentistry, and their fracture remains problematic, especially in all-ceramic systems. We hypothesized that substructure properties have a significant effect on the longevity of porcelain-veneered crowns. Flat porcelain/metal or porcelain/ceramic structures were cemented to dentin-like composite, and a mouth-motion cyclic load of 200 N was delivered by means of a tungsten carbide spherical indenter (r = 3.18 mm), emulating occlusal loading on crowns supported by dentin. Findings indicated that porcelain on a low-hardness gold-infiltrated alloy was vulnerable to both occlusal surface contact damage and porcelain lower surface radial fracture, while porcelain on a higher-hardness palladium-silver alloy fractured chiefly from occlusal surface damage. The advantage of a high-modulus metal substructure was less pronounced. Fracture in the porcelain/zirconia system was limited to surface damage in the veneer layer, similar to that in the porcelain/palladium- silver system. Bulk fracture, observed in veneered alumina layers, was not found for zirconia.

KW - Ceramic

KW - Contact fatigue

KW - Crowns

KW - Fracture

KW - Porcelain-veneered structures

UR - http://www.scopus.com/inward/record.url?scp=33847067200&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847067200&partnerID=8YFLogxK

U2 - 10.1177/154405910708600207

DO - 10.1177/154405910708600207

M3 - Article

C2 - 17251513

AN - SCOPUS:33847067200

VL - 86

SP - 142

EP - 146

JO - Journal of Dental Research

JF - Journal of Dental Research

SN - 0022-0345

IS - 2

ER -