지대치 형태에 따른 Post core의 치근내부 및 지지조직의 응력분석
Stress analysios of root and supporting tissues by various post core design
김진, 방몽숙,
소속 상세정보
김진 ( Kim Jin ) - 전남대학교 치과대학 치과보철학교실
방몽숙 ( Vang Mong-Sook ) - 전남대학교 치과대학 치과보철학교실
KMID : 0362419930310040468
Abstract
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.
10kgf/mm* force was applied respectively as follows: 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 follows: @EN 1. In the case of 130틇houlder 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 case of but 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 both structure effected the level of stress significantly and it determined the location of stress concentration.
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