J Korean Acad Conserv Dent.  2006 Jan;31(1):20-29. 10.5395/JKACD.2006.31.1.020.

The effect of restorative materials on the stress distribution of class V composite resin restorations: a 3D finite element investigation

• Ahn HR
• Kim HC
• Huh B
• Park JK

• KMID: 2175777
• DOI: http://doi.org/10.5395/JKACD.2006.31.1.020

Abstract

The purpose of this study was to analyze the stress distribution aspect of unrestored and restored combined shape (wedge shape occlusally and saucer shape gingivally) class V cavity, which found frequently in clinical cases. A maxillary second premolar restored with a combined shape class V composite restorations were modeled using the three dimensional finite element method. Static occlusal load of 170 N was applied on lingual incline of buccal cusp at the angle of 45degrees with the longitudinal axis of the tooth. And three dimensional finite element analysis was taken by ANSYS (Version 6.0, Swanson Analysis System Co., Houston, U.S.A) program which represent the stress distribution on unrestored and restored cavity wall and margin. The conclusions were as follows. 1. Compared to the unrestored cavity, Von Mises stress at the cementoenamel junction and line angle of the cavity base were reduced and in restored cavity. 2. Von Mises stress at the occlusal and cervical cavity margin and wall were increased in restored cavity in comparison with the unrestored cavity. 3. In the hybrid and hybrid/flowable composite resin restoration, Von Mises stress at the cementoenamel junction and line angle of the cavity base were reduced more than in the flowable restoration. 4. In the hybrid and hybrid/flowable composite resin restoration, Von Mises stress at the occlusal and cervical cavity margin and wall were increased more than in the flowable restoration.

Keyword

Class V; Von Mises; Finite element analysis; Resin; Stress distribution

MeSH Terms

Axis, Cervical Vertebra
Bicuspid
Finite Element Analysis
Tooth
Tooth Cervix

Figure

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  Figure 1 The 3-D finite element mesh model.

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  Figure 2 Cavity Design.

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  Figure 3 Applied force on the tooth.

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  Figure 4 Von Mises stress node number of cavity outline.

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  Figure 5 Von Mises stress node number of cavity wall.

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  Figure 6 Stress distribution on cavity margins and restorations.

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  Figure 7 Stress distribution on cavity margins (before and after restoration).

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  Figure 8 Stress distribution on cavity walls.

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  Figure 9 Stress distribution on cavity wall (before and after filling).

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