The Numerical Analysis Of The Anti-fracture Intensity Of The Packed And Repaired Tooth

The packing and repair of the tooth grown is a usual technology in the treatment of diseases of the tooth. The packed and repaired tooth, however, often get fractured medically. In order to farthest reduce the possibility of medical fracture and enhance the longevity of the packed and repaired tooth, we try to adopt some scientific methods and make a rational scheme, pertinently for the clinic operation. With the rapid development of the computer science, the Finite Element Method has become a significant method in the research of the biological mechanics. The application of the biological mechanics in the stomatology supplies some mechanical basis for the evaluation of the tooth treatment and the research, development and usage of the materials used for repair. The numerical analysis methods like the Finite Element Method are employed to make modeling for the complex geometric shape objects and get the integral or local stress data, displacement values and their distributing disciplinarian. Meanwhile, some reference analysis could be made in different stress and distribution in the case that the mechanical parameters like loads and boundary condition are freely changed in the same model shape. A converse modeling and Finite Element grid division method is systematically introduced in this paper. The CAD model of the second molar of the upper jaw is conversely established with the help of UG, a kind of general CAD software and on the basis of the JPG pictures gained from the CT scanning. And then the 3-D Finite Element analysis model is built after the grid division via ANSYS, a type of Finite Element analysis software. The stress state of the tooth under ten different loads are studied, which then leads to a general stress distribution disciplinarian according to the stress nephogram. Besides, the stress state of the repaired tooth in different packing materials, cavity shapes and cavity capacities are discussed when enduring different loads, and the change disciplinarian of the enduring ability in corresponding packing is also obtained on the basis of the stress nephogram. For the sake of validating the reliability of the Finite Element methods, an experiment is designed adopting the Laser Interferometry method. The transfiguration of the tooth in different loads are measured and compared with the analysis data from the 3-D Finite Element software. Finally, a fairly accordant analysis result is acquired.