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KMID : 0362320060310060427
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Journal of Korean Academy of Operative Dentistry
2006 Volume.31 No. 6 p.427 ~ p.436
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Effects of occlusal load on the cervical stress distribution: A three-dimensional finite element study
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Lee Hyeong-Mo
Hur Bock
Kim Hyeon-Cheol
Woo Sung-Gwan
Kim Kwang-Hoon
Son Kwon
Park Jeong-Kil
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Abstract
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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 fnite 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.
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KEYWORD
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Occlusal load, Stress distribution, Finite element analysis, Maxillary second premolar, Compressive stress, Tensile stress
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