Abstract
The aim of this work is to analyze the stress distributions on a crown-luting cement-substrate system with a finite-element method in order to predict the likelihood of interfacial micro cracks, radial or circumferential cracks, delamination, fracture and delamination with torsion. The contact and layer interface stresses in elastic layered half-space indented by an elastic sphere were examined using finite element method. The model consists of crown, luting cement and substrate. The solutions were carried out for three different elastic moduli of luting cement. It was placed between the cement and the substrate as a middle layer and its elastic module was chosen lower than the elastic module of crown and higher than the elastic module of dentin. An axisymmetric finite element mesh was set up for the stress analysis. Stress distributions on the contact surface and the interfaces of crown-luting cement and luting cement-dentin have been investigated for three different values of luting cement by using ANSYS. The effects of the luting cement which has three different elastic moduli on the pressure distribution and the location of interfacial stresses of the multi-layer model have been examined. The mechanism of crack initiation in the interfaces and interfacial delamination was also studied quantitatively. For each luting cement, the pressure distribution is similar at the contact zone. Stress discontinuities occur at the perfect bonding interfaces of the crown-luting cement and the substrate-luting cement. The maximum stress jumps are obtained for the highest and the lowest elastic module of the luting cement. In the crown-luting cement-substrate system, failures may initiate at crown-luting cement region for luting cement with the lowest elastic module value. In addition, failures at luting cement-substrate region may occur for luting cement with the highest elastic module. In the luting cement, the medium elastic module value is more suitable for stress distribution in crown-luting cement-substrate interfaces.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
ARNELL R D. The mechanism underlying the cracking and spalling of thin hard coating [C]// Ion and Plasma Assisted Techniques. Geneva, 1989: 226–231.
KRAL E R, KOMVOPOULOS K, BOGY D B. Elastic-plastic finite element analysis of repeated indentation of a half-space by a rigid sphere [J]. Journal of Applied Mechanics, ASME Transactions, 1993, 60: 829–841.
KRAL E R, KOMVOPOULOS K, BOGY D B. Finite element analysis of repeated indentation of an elastic-plastic layered medium by a rigid sphere. Part 1: Surface result [J]. Journal of Applied Mechanics, ASME Transactions, 1995, 62: 20–28.
KRAL E R, KOMVOPOULOS K, BOGY D B. Finite element analysis of repeated indentation of an elastic-plastic layered medium by a rigid sphere. Part 2: Subsurface results [J]. Journal of Applied Mechanics, ASME Transactions, 1995, 62: 29–42.
TANGENA A G, WIJNHOVEN P J M. The correlation between mechanical stresses and wear in a layered system [J]. Wear, 1988, 121: 27–35.
TIAN H, SAKA N. Finite element analysis of an elastic-plastic two-layer half-space: Normal contact [J]. Wear, 1991, 148: 47.
de JAGER N, PALLAV P, FEILZER A J. The influence of design parameters on the FEA-determined stress distribution in CAD-CAM produced all-ceramic dental crowns [J]. Dent Mater, 2005, 21(3): 242–251.
LI L L, WANG Z Y, BAI Z C, MAO Y, GAO B, XIN H T, ZHOU B, ZHANG Y, LIU B. Three-dimensional finite element analysis of weakened roots restored with different cements in combination with titanium alloy posts [J]. Chinese Medical Journal, 2006, 119(4): 305–311.
REKOW E D, HARSONO M, JANAL M, THOMPSON V P, ZHANG G. Factorial analysis of variables influencing stress in all-ceramic crowns [J]. Dent Mater, 2006, 22(2): 125–132.
OZEL A, KADIOGLU F, SEN S, SADELER R. Finite element analysis of adhesive joints in four-point bending load [J]. The Journal of Adhesion, 2003, 79: 683–697.
SEN S, AKSAKAL B, OZEL A. A finite-element analysis of the indentation of an elastic-work hardening layered half-space by an elastic sphere [J]. Int J Mech Sci, 1998, 40(12): 1281–1293.
SEN S, GUN B. A finite-element analysis of residual stress at the unloaded stage of the indentation of an elastic-work hardening layered half-space by a rigid sphere [J]. Surface & Coatings Technology, 2006, 200: 2841–2851.
FAULKNER A, TANG K C, SEN S, ARNELL R D. Finite element solutions comparing the normal contact of an elastic-plastic layered medium under loading by (a) a rigid and (b) a deformable indenter [J]. The Journal of Strain Analysis for Engineering Design, 1998, 33(6): 411–418.
TANG K C, FAULKNER A, SEN S, ARNELL R D. The finite element analysis of a strain hardening layered medium under normal loading by (a) a rigid and (b) a deformable indenter [J]. The Journal of Strain Analysis for Engineering Design, 1998, 33(6): 401–410.
JOHNSON K L. Contact mechanics [M]. Cambridge: Cambridge University Press, 1985: 62.
JOHNSON K L. Contact Mechanics [M]. Cambridge: Cambridge University Press, 1985: 155–184.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sen, S., Guler, M.S. & Guler, C. Stress distributions on crown-luting cement-substrate system with finite element method. J. Cent. South Univ. 19, 2115–2124 (2012). https://doi.org/10.1007/s11771-012-1253-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11771-012-1253-5