formed tooth

Most of the third molar embryo had been formed and their tooth crowns had been calcified, the occurrence ratio was 84 0% in maxilla and 85 2% in mandible.

上下颌第三磨牙牙胚绝大多数已形成且牙冠已钙化完成，其出现率为上颌840%，下颌852%；

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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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Firstly, the data of the surface ′ s point of a tooth are gotten from the spiral bevel gear tooth surface equation, then, the whole tooth surface data are formed through converting the previous data.

首先，根据弧齿锥齿轮的齿面方程求出一个轮齿的齿面上点的数据，然后经过旋转变换便形成全部齿面的数据。

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The equation inferential reasoning provides the theory basis for the awl tooth transition surface, the tooth root face, cut the equation of a curve and the geometry restraint equation inferential reasoning, they are essential to formed the overall awl tooth full-scale mockup.

该方程的推导为锥齿过渡面、齿根面、切曲线方程和几何约束方程的推导提供了理论依据，它们对形成整体锥齿实体模型是不可缺少的。

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It is a fiber network structure which is formed by dental epithelial and dental mesenchymal inducing by the signal of dental epithelial organ. But dental epithelial organ gradually shrinks away as the complete maturation of tooth in adult body.

它是牙源性上皮组织的诱导下由间充质和上皮共同形成的纤维网状结构，但在成体情况下，上皮来源的组织随着牙齿的发育成熟逐渐萎缩消失。

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