The effects of dentin bonding agent thickness on stress distribution of composite-tooth interface : Finite element method

Sang-Il Park; Yemi Kim; Byoung-Duk Roh

doi:10.5395/JKACD.2009.34.5.442

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Park, Kim, and Roh: The effects of dentin bonding agent thickness on stress distribution of composite-tooth interface : Finite element method

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2009; 34(5): 442-449.

Published online: 30 September 2009

DOI: https://doi.org/10.5395/JKACD.2009.34.5.442

The effects of dentin bonding agent thickness on stress distribution of composite-tooth interface : Finite element method

Sang-Il Park, Yemi Kim, Byoung-Duk Roh

Department of Conservative Dentistry, College of Dentistry, Yonsei University, Korea.

Corresponding author: Byoung-Duk Roh. Department of Conservative Dentistry, College of Dentistry, Yonsei University, 134 Shinchon-dong, Seodamun-gu, Seoul, 120-752, Korea. Tel: 82-2-2228-3146, Fax: 82-2-313-7575, operatys16@yuhs.ac

Received 24 July 2009 Revised 15 August 2009 Accepted 22 August 2009

(open-access):

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this study was to examine that thick dentin bonding agent application or low modulus composite restoration could reduce stresses on dentin bonding agent layer.

A mandibular first premolar with abfraction lesion was modeled by finite element method. The lesion was restored by different composite resins with variable dentin bonding agent thickness (50µm, 100µm, 150µm). 170N of occlusal loading was applied buccally or lingually. Von Mises stress on dentin bonding agent layer were measured.

When thickness of dentin bonding agent was increased von Mises stresses at dentin bonding agent were decreased in both composites. Lower elastic modulus composite restoration showed decreased von Mises stresses. On root dentin margin more stresses were generated than enamel margin.

For occlusal stress relief at dentin boning agent layer to applicate thick dentin bonding agent or to choose low elastic modulus composite is recommended.

Keywords: Class V cavity, composite resin, dentin bonding agent, stress-distribution, finite element method

Figures and Tables

Figure 1

2-D finite element model simulated in this study.

Figure 2

von Mises stress at Z100 when buccal loading applied

Figure 3

von Mises stress at Tetric Flow when buccal loading applied

Figure 4

von Mises stress at Z100 when lingual loading applied

Figure 5

von Mises stress at Tetric Flow when lingual loading applied

Figure 6

Principal stress vectors on adhesive when buccal loading applied

Figure 7

Principal stress vectors on adhesive when lingual loading applied

Table 1

Experimental models used in this study

^a3M Dental Products, St. Paul, USA

^bIvoclar Vivadent, FL-9494-Schaan, Liechtenstein

^cKerr, Orange, CA, USA

Table 2

Mechanical properties of the materials used in the study

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