standard tooth

When worm gear pair is formed by standard worm and worm wheel generated by hob of type ⅱ, its sensibility to errors is reduced while the worm gear pair is assembled originally and good tooth contact quality is acquired after its running in.

本文提出失配修形法，用标准蜗杆与由Ⅱ型滚刀加工的蜗轮失配啮合，使蜗杆副初装时对误差不敏感，跑合后得到良好的接触质量。

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The deformation design is finished. ( 3) The construction technology of the standard tooth crown database is researched.

研究了标准冠数据库的建库技术。

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Gear tooth tip relief based on standard hob

基于标准齿轮滚刀的齿顶修缘

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3-D reconstruction of standard tooth crown and related shape deformation

标准牙冠计算机三维图形的重建及其空间几何变换的研究

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Objective To establish the standard tooth crowns and bridges database in CAD/ CAM system and help the doctor rapidly design the shape of tooth crown according to model data template from the database.

目的：开发口腔修复CAD/CAM系统中标准牙冠和桥体数据库原型系统，帮助口腔医生快速获得牙冠设计的数据模板，为高效地设计牙冠模型作准备。

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Minimum Teeth of No-undercut Standard Gear with Arcuate Tooth Traces

标准圆弧齿线圆柱齿轮不发生根切的最少齿数

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By this method one can obtain a higher contact ratio under conditions of no undercut and ensure thickness of tooth top, which is possible to be manufactured by the current machine tools and the standard cutters.

这种方法可以有效地增大端面重合度，并保证所设计的齿轮不根切、齿顶不变尖，可在现有机床上使用标准系列刀具加工。

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Methods Investigated dental calculus, gum infection, incidence of decayed tooth and the method and times for tooth brush in accordance with the decayed tooth and periodontal disease investigation standard in China.

方法按我国龋病、牙周病调查标准就牙石、牙龈炎、牙周袋、龋病发病率及刷牙次数和方法进行调查。

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