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KMID : 0376319920040010075
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Dental Journal of CNU
1992 Volume.4 No. 1 p.75 ~ p.91
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Stress analysis of root and supporting tissues by various post core design
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Abstract
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The purpose of this study was to analyze the stresses and displacements of various post and core.
The Finite element models of central incisors were divided into seven types according to the various amount of remaining tooth structures.
@ES 10kgf/㎟ force was applied respectively as follows:
@EN 1) Horizontal on the labial surface
2) 26° diagonal direction on the lingual surface
Material property, geometry, and load condition of each model were inputted to the two dimensional ANSYS 4.4A finite element program; stresses and displacements were analyzed.
@ES Results were as follows:
@EN 1. In the cases of 130°shoulder post and core. Maximum tensile and shear stresses were observed in the crown margin.
2. Maximum shear stress was about 29% reduced by contrabevel.
3. In the case of 1mm axial tooth structure. Maximum tensile stress observed in the dentin.
4. In the cases of butt joint of cervix, Maximum stress concentration was observed in the dentin by the inclined and horizontal force.
5. Horizontal force produced the extraordinary high stresses in dentin and supporting structures.
6. The amount of remaining tooth structure affected the level of stress significantly and it determined the location of stress concentration.
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KEYWORD
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