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首页> 外文会议>Conference on Lasers in Dentistry IX Jan 26-27, 2003 San Jose, California, USA >Model Calculations for Three Dimensional Heat Conduction in a Real Tooth
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Model Calculations for Three Dimensional Heat Conduction in a Real Tooth

机译：真实牙齿中三维热传导的模型计算

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摘要

To generate the three-dimensional grid net for a real tooth, an extracted tooth was grinded in steps of some millimetres from the top to the root. After each grinding step the displayed cross section was documented by photography showing clearly all transition lines between enamel, dentin and the pulp. The photographic reprints were used to determine the x-y-z-coordinates of selected points to represent the transition lines. In a fairly large-scale procedure these points were combined to a three dimensional net. FEM calculations were carried out to solve the heat equation numerically for the boundary condition that an IR laser pulse hits the surface for laser ablation. Since all the information of the various types of tissue is included in this model, the results give a huge variety of information. For example: the outer shell of enamel could be displayed exclusively to show its inner surface and which temperature distribution as well as mechanical stress got build up there.
机译：为了生成用于真实牙齿的三维栅格网，将提取的牙齿从顶部到根部以几毫米的步长进行研磨。在每个研磨步骤之后，通过摄影记录显示的横截面，清楚地显示出牙釉质，牙本质和牙髓之间的所有过渡线。摄影重印用于确定所选点的x-y-z坐标以表示过渡线。在相当大规模的过程中，这些点被组合成三维网络。进行了有限元计算，以数值求解红外激光脉冲击中表面进行激光烧蚀的边界条件下的热方程。由于各种类型组织的所有信息都包含在此模型中，因此结果提供了各种各样的信息。例如：搪瓷的外壳可以专门显示其内表面，并在那里建立温度分布和机械应力。

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