J Korean Acad Conserv Dent.  2006 Nov;31(6):427-436. 10.5395/JKACD.2006.31.6.427.

Effects of occlusal load on the cervical stress distribution: A three-dimensional finite element study

• Lee HM
• Hur B
• Kim HC
• Woo SG
• Kim KH
• Son K
• Park JK

• KMID: 1986885
• DOI: http://doi.org/10.5395/JKACD.2006.31.6.427

Abstract

The objective of this study was to investigate the effects of various occlusal loads on the stress distribution of the buccal cervical region of a normal maxillary second premolar, using a three dimensional finite element analysis (3D FEA). After 3D FE modeling of maxillary second premolar, a static load of 500N of three load cases was applied. Stress analysis was performed using ANSYS (Swanson Analysis Systems, Inc., Houston, USA). The maximum principal stresses and minimum principal stresses were sampled at thirteen nodal points in the buccal cervical enamel for each four horizontal planes, 1.0 mm above CEJ, 0.5 mm above CEJ, CEJ, 0.5 mm under CEJ. The results were as follows 1. The peak stress was seen at the cervical enamel surface of the mesiobuccal line angle area, asymmetrically. 2. The values of compressive stresses were within the range of the failure stress of enamel. But the values of tensile stresses exceeded the range of the failure stress of enamel. 3. The tensile stresses from the perpendicular load at the buccal incline of palatal cusp may be shown to be the primary etiological factors of the NCCLs.

Keyword

Occlusal load; Stress distribution; Finite element analysis; Maxillary second premolar; Compressive stress; Tensile stress

MeSH Terms

Bicuspid
Dental Enamel
Finite Element Analysis
Tooth Cervix

Figure

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  Figure 1 Three load conditions of 3D FE model.

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  Figure 2 Principal stress distribution of Load-I,II,III (Upper lines; tensile stress distributions Lower lines; compressive stress distributions).

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  Figure 3 Principal stresses of Level A,B,C,D of three load conditions.

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