Stress singularity analysis in the restorations of premolar class ii cavities

Ching Hwei Chue, Yi Liang Ou, Tung Yiu Wong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This paper presents the singular stress analysis near the apex of a structure formed during dental restoration of a premolar class II cavity. Based on the elasticity theory, the stresses may go to infinity at the junctions of different materials (e.g. dentine, enamel, restoration materials). Tensions will cause material separation and then material fracture. In order to reduce the failure probability, the degree of stress concentration has to be reduced. The stress singularity order and the stress intensity factor are two parameters, which are often used in fracture analysis. The objective of this paper is to find conditions such that non-singular stress fields are possible. Three critical positions in the restoration structure are discussed. They are the tips of interface between (1) enamel and restoration; (2) dentine and restoration; and (3) enamel, dentine and restoration. In the last two cases, the restoration may be bonded or debonded to enamel or dentine. After employing Kolosov-Muskhelishvili complex functions together with the eigenfunction expansion method, the singularity orders are computed theoretically. Weak stress singularity conditions can be sought by properly selecting cutting angles or restoration materials.

Original languageEnglish
Pages (from-to)747-756
Number of pages10
JournalJournal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an
Volume26
Issue number6
DOIs
Publication statusPublished - 2003 Jan 1

Fingerprint

Stress analysis
Restoration
Enamels
Eigenvalues and eigenfunctions
Stress intensity factors
Stress concentration
Elasticity

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

@article{ab8bf5470b144a7195ff7165f405a37e,
title = "Stress singularity analysis in the restorations of premolar class ii cavities",
abstract = "This paper presents the singular stress analysis near the apex of a structure formed during dental restoration of a premolar class II cavity. Based on the elasticity theory, the stresses may go to infinity at the junctions of different materials (e.g. dentine, enamel, restoration materials). Tensions will cause material separation and then material fracture. In order to reduce the failure probability, the degree of stress concentration has to be reduced. The stress singularity order and the stress intensity factor are two parameters, which are often used in fracture analysis. The objective of this paper is to find conditions such that non-singular stress fields are possible. Three critical positions in the restoration structure are discussed. They are the tips of interface between (1) enamel and restoration; (2) dentine and restoration; and (3) enamel, dentine and restoration. In the last two cases, the restoration may be bonded or debonded to enamel or dentine. After employing Kolosov-Muskhelishvili complex functions together with the eigenfunction expansion method, the singularity orders are computed theoretically. Weak stress singularity conditions can be sought by properly selecting cutting angles or restoration materials.",
author = "Chue, {Ching Hwei} and Ou, {Yi Liang} and Wong, {Tung Yiu}",
year = "2003",
month = "1",
day = "1",
doi = "10.1080/02533839.2003.9670829",
language = "English",
volume = "26",
pages = "747--756",
journal = "Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers",
issn = "0253-3839",
publisher = "Chinese Institute of Engineers",
number = "6",

}

Stress singularity analysis in the restorations of premolar class ii cavities. / Chue, Ching Hwei; Ou, Yi Liang; Wong, Tung Yiu.

In: Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an, Vol. 26, No. 6, 01.01.2003, p. 747-756.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Stress singularity analysis in the restorations of premolar class ii cavities

AU - Chue, Ching Hwei

AU - Ou, Yi Liang

AU - Wong, Tung Yiu

PY - 2003/1/1

Y1 - 2003/1/1

N2 - This paper presents the singular stress analysis near the apex of a structure formed during dental restoration of a premolar class II cavity. Based on the elasticity theory, the stresses may go to infinity at the junctions of different materials (e.g. dentine, enamel, restoration materials). Tensions will cause material separation and then material fracture. In order to reduce the failure probability, the degree of stress concentration has to be reduced. The stress singularity order and the stress intensity factor are two parameters, which are often used in fracture analysis. The objective of this paper is to find conditions such that non-singular stress fields are possible. Three critical positions in the restoration structure are discussed. They are the tips of interface between (1) enamel and restoration; (2) dentine and restoration; and (3) enamel, dentine and restoration. In the last two cases, the restoration may be bonded or debonded to enamel or dentine. After employing Kolosov-Muskhelishvili complex functions together with the eigenfunction expansion method, the singularity orders are computed theoretically. Weak stress singularity conditions can be sought by properly selecting cutting angles or restoration materials.

AB - This paper presents the singular stress analysis near the apex of a structure formed during dental restoration of a premolar class II cavity. Based on the elasticity theory, the stresses may go to infinity at the junctions of different materials (e.g. dentine, enamel, restoration materials). Tensions will cause material separation and then material fracture. In order to reduce the failure probability, the degree of stress concentration has to be reduced. The stress singularity order and the stress intensity factor are two parameters, which are often used in fracture analysis. The objective of this paper is to find conditions such that non-singular stress fields are possible. Three critical positions in the restoration structure are discussed. They are the tips of interface between (1) enamel and restoration; (2) dentine and restoration; and (3) enamel, dentine and restoration. In the last two cases, the restoration may be bonded or debonded to enamel or dentine. After employing Kolosov-Muskhelishvili complex functions together with the eigenfunction expansion method, the singularity orders are computed theoretically. Weak stress singularity conditions can be sought by properly selecting cutting angles or restoration materials.

UR - http://www.scopus.com/inward/record.url?scp=0344549817&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0344549817&partnerID=8YFLogxK

U2 - 10.1080/02533839.2003.9670829

DO - 10.1080/02533839.2003.9670829

M3 - Article

AN - SCOPUS:0344549817

VL - 26

SP - 747

EP - 756

JO - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers

JF - Chung-kuo Kung Ch'eng Hsueh K'an/Journal of the Chinese Institute of Engineers

SN - 0253-3839

IS - 6

ER -