TY  - EJOU
AU  - Yamaguchi, Kyousuke  
AU  - Noda, Nao-Aki  
AU  - Chen, Ker-Kong  
AU  - Tajima, Kiyoshi  
AU  - Harada, Seiji 
AU  - Lan, Xin  

TI  - Generalized Stress Intensity Factors for Wedge-Shaped Defect in Human Tooth after Restored with Composite Resins
T2  - Structural Durability \& Health Monitoring

PY  - 2009
VL  - 5
IS  - 3
SN  - 1930-2991

AB  - Wedge-shaped defects are frequently observed on the cervical region of the human tooth. Previously, most studies explained that improper tooth-brushing causes such defects. However, recent clinical observation suggested that the repeated stress due to occlusal force may induce the formation of these wedge-shaped defects. In this study, a two-dimensional human tooth model after a wedge-shaped defect is restored with the composite resin is analyzed by using the finite element method. To obtain the intensity of the singular stress accurately, a method of analysis is discussed for calculating generalized stress intensity factors, which control the singular stress around the corner of inclusion. In this study, elastic module ratios of the composite resin are varied systematically. Then, the relationships between the stress intensity and occlusion are discussed.
KW  - Elasticity
KW  -  Biomechanics
KW  -  Fracture Mechanics
KW  -  Finite Element Method
KW  -  Wedge-Shaped Defect
KW  -  Human Tooth

DO  - 10.3970/sdhm.2009.005.191