Stress-strain analysis for evaluating the effect of the orientation of dentin tubules on their mechanical properties and deformation behavior.
A model whose porosity does not vary with compression depth is developed for evaluating the mechanical properties of dentin tubules with various orientation angles from micro-pillar nanocompression tests. Experimental results for a range of loading rates indicate that the yielding parameters and the elastic modulus are little affected by the creep behavior. For a given compression depth, the hardness, elastic modulus, and yielding strength decrease with increasing orientation angle of dentin. The mechanical properties obtained using the proposed model are consistent with the reported data, and are actually more precise since they consider the orientation angle. The proposed testing method can be applied to materials that yield a negative value of the elastic modulus due to creep behavior.
Department of Mechanical Engineering, National Cheng Kung University, Tainan 701, Taiwan, ROC.
Chang-Fu
CF
Han
Bo-Hsiung
BH
Wu
Chung-Jen
CJ
Chung
Shu-Fen
SF
Chuang
Wang-Long
WL
Li
Jen-Fin
JF
Lin
D000465:Algorithms; D001672:Biocompatible Materials / Q000737:chemistry; D001696:Biomechanical Phenomena; D019245:Compressive Strength; D003799:Dental Stress Analysis / Q000379:methods; D003804:Dentin / Q000737:chemistry*; D055119:Elastic Modulus; D006244:Hardness; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning / Q000379:methods; D015233:Models, Statistical; D011312:Pressure; D013314:Stress, Mechanical
D001672:Biocompatible Materials