磨尖

ZZM-A drill grinder simple structure, easy operation. One setup to complete grindings on drill web and chisel edge.

ZZM-A型钻头磨刀机结构简单，使用方便，一次装夹就可以完成钻头的钻尖和横刃的修磨。

［Objective］ This work is to study the relationship of mandibular third molars between the number of dental cusps and that of roots.

［目的］探讨下颌第三磨牙的牙尖数与牙根数的关系，为临床拔除阻生齿提供依据。

These results showed that: as a result of sFrp2 overexpression, recombined tooth germs made teeth which have no difference in size or cusps.

实验结果表明：在E13.5小鼠磨牙间充质中过表达sFrp2后牙齿大小、牙尖数目及形态结构都没有明显差异。

A ngular when new ,this grit rapidly rounds off in use and is particularly suited to descaling applications.

此种磨料新制成时，是尖棱状的，使用过程中棱角很快就被磨圆，特别适合于去除氧化皮作业。

Molar crown is not only very small and thin-wall, but also has complex profile, especially occlusal surface that distributes many cusps, ridges and fossas is obviously different.

磨牙冠不仅微小、壁薄，而且外形极其复杂，尤其牙合面尖、嵴、窝个性化特点明显，采用传统加工工艺很难快速、精确地加工出修复体外形。

Based on the present histological and previous molecular biological studies, the special structure at the apical end is obviously different from the cervical loop giving rise to Hertwig's epithelial root sheath, in human, mouse and rat molar tooth germs.

作者所作的组织学和分子生物学实验结果表明，人类、大鼠及小鼠磨牙牙胚中这种根尖末端特殊的结构与颈环区Hertwig上皮根鞘结构明显不同。

METHODS: 300 patients, who needed to take dental X-ray photography of maxillary or mandibular molar were randomly assigned to 3 groups.

选取拍摄上颌或下颌磨牙区根尖片的患者300例，随机分为试验Ⅰ组、试验Ⅱ组及对照组共3组。

In control group, we use the traditional RME method of utilizing bands on bilateral premolars and molars.

对照组在犬的尖牙和第一磨牙上制作个别带环，按传统方法进行螺旋扩弓器的快速扩弓。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。