Competition of fracture mechanisms in monolithic dental ceramics: Flat model systems

Yu Zhang; Jae Won Kim; Sanjit Bhowmick; P. Van Thompson; E. Dianne Rekow

doi:10.1002/jbm.b.31100

Competition of fracture mechanisms in monolithic dental ceramics: Flat model systems

Yu Zhang, Jae Won Kim, Sanjit Bhowmick, P. Van Thompson, E. Dianne Rekow

Biomaterials and Biomimetics

Research output: Contribution to journal › Article › peer-review

Abstract

Monolithic (single layer) glass-ceramic restorations often fail from chipping and fracture. Using blunt indentation of a model flat porcelain-like brittle layer bonded onto a dentin-like polymer support system, a variety of fatigue fracture modes has been identified and analyzed: outer cone, inner cone, and median cracks developing in the near-contact region at the occlusal surface; radial cracks developing at the internal cementation surface along the loading axis. Our findings indicate that monolithic glass-ceramic layers are vulnerable to both occlusal surface damage and cementation internal surface fracture. Clinical issues in the longevity of ceramic restorations are discussed in relation to biting force, physical properties of ceramic crowns and luting cement, and thicknesses of ceramic and cement layers.

Original language	English (US)
Pages (from-to)	402-411
Number of pages	10
Journal	Journal of Biomedical Materials Research - Part B Applied Biomaterials
Volume	88
Issue number	2
DOIs	https://doi.org/10.1002/jbm.b.31100
State	Published - Feb 2009

Keywords

Cementation radial fracture
Fatigue loading
Llayered ceramic structures
Occlusal cone fracture

ASJC Scopus subject areas

Biomaterials
Biomedical Engineering

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10.1002/jbm.b.31100

Cite this

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title = "Competition of fracture mechanisms in monolithic dental ceramics: Flat model systems",

abstract = "Monolithic (single layer) glass-ceramic restorations often fail from chipping and fracture. Using blunt indentation of a model flat porcelain-like brittle layer bonded onto a dentin-like polymer support system, a variety of fatigue fracture modes has been identified and analyzed: outer cone, inner cone, and median cracks developing in the near-contact region at the occlusal surface; radial cracks developing at the internal cementation surface along the loading axis. Our findings indicate that monolithic glass-ceramic layers are vulnerable to both occlusal surface damage and cementation internal surface fracture. Clinical issues in the longevity of ceramic restorations are discussed in relation to biting force, physical properties of ceramic crowns and luting cement, and thicknesses of ceramic and cement layers.",

keywords = "Cementation radial fracture, Fatigue loading, Llayered ceramic structures, Occlusal cone fracture",

author = "Yu Zhang and Kim, {Jae Won} and Sanjit Bhowmick and {Van Thompson}, P. and Rekow, {E. Dianne}",

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T1 - Competition of fracture mechanisms in monolithic dental ceramics

T2 - Flat model systems

AU - Zhang, Yu

AU - Kim, Jae Won

AU - Bhowmick, Sanjit

AU - Van Thompson, P.

AU - Rekow, E. Dianne

PY - 2009/2

Y1 - 2009/2

N2 - Monolithic (single layer) glass-ceramic restorations often fail from chipping and fracture. Using blunt indentation of a model flat porcelain-like brittle layer bonded onto a dentin-like polymer support system, a variety of fatigue fracture modes has been identified and analyzed: outer cone, inner cone, and median cracks developing in the near-contact region at the occlusal surface; radial cracks developing at the internal cementation surface along the loading axis. Our findings indicate that monolithic glass-ceramic layers are vulnerable to both occlusal surface damage and cementation internal surface fracture. Clinical issues in the longevity of ceramic restorations are discussed in relation to biting force, physical properties of ceramic crowns and luting cement, and thicknesses of ceramic and cement layers.

AB - Monolithic (single layer) glass-ceramic restorations often fail from chipping and fracture. Using blunt indentation of a model flat porcelain-like brittle layer bonded onto a dentin-like polymer support system, a variety of fatigue fracture modes has been identified and analyzed: outer cone, inner cone, and median cracks developing in the near-contact region at the occlusal surface; radial cracks developing at the internal cementation surface along the loading axis. Our findings indicate that monolithic glass-ceramic layers are vulnerable to both occlusal surface damage and cementation internal surface fracture. Clinical issues in the longevity of ceramic restorations are discussed in relation to biting force, physical properties of ceramic crowns and luting cement, and thicknesses of ceramic and cement layers.

KW - Cementation radial fracture

KW - Fatigue loading

KW - Llayered ceramic structures

KW - Occlusal cone fracture

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Competition of fracture mechanisms in monolithic dental ceramics: Flat model systems

Abstract

Keywords

ASJC Scopus subject areas

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