牙

The folk belief governing this practice is that when a new tooth grows in, it will possess the dental qualities, not of the original, lost tooth, but of whatever creature finds it, so the creatures of choice would be those world-class champers, the rodents.

这种习俗依据的民间观念认为，新牙长出来时不具有原先脱落的牙齿的特质，哪种动物发现了掉下来的牙，新牙就具有那种动物的牙的特质。因此，要选那些世界一流的擅长啃咬的动物，那些啮齿目动物。

To study the effect of extroral appliance in treatment of anterior crossbite and crowded dentition.

目的 探讨口外弓及前方牵引装置对混合牙列期或恒牙列早期前牙反并牙列拥挤病例治疗的有效性。

Methods Twelve cases of anterior crossbite and crowded dentition (with 6~12 mm) were included using extroral arch and extroral protraction in the same time or in the different time.

选择混合牙列期或恒牙早期有前牙反并牙列拥挤（拥挤度6~12 mm）病例12例，同时或先后使用前方牵引装置和口外弓装置，观察疗效。

At the end of the experiment, the first incisors of 1 , II , III group were pulled out respectively, some were decalcified for SEM and TEM examinants and HYP analyses; the others were not decalcified for SEM examinants.

实验结束时，取Ⅰ、Ⅱ、Ⅲ组的每只羊的第一对切齿，不脱钙扫描电镜观察牙釉质与牙基质的结构情况；脱钙后扫描和透射电镜观察牙基质结构，化学分析法分析牙基质中羟脯氨酸的含量。

Results: Haemoglobin and haematin were detected in the dentinal tubules of discolored teeth from group A and no evidence of ferric or haemosiderin. Specimens from group B demonstrated a negative response to histochemical tests.

组织化学实验结果显示：变色牙牙本质小管内存在高铁血红素和血红蛋白，缺乏铁离子和含铁血黄素：漂白后的牙本质小管内未见任何红细胞的分解产物。B组变色牙漂白4周后染色均消失，牙齿颜色恢复正常。

Objective To evaluate the relationship between the teeth and basal bone by Howes′method, and to investigate the clinical value of this method in orthodontic diagnoses and treatment.

目的：本研究采用Howes法评估牙弓骨量与牙量的协调性，探讨其在正畸临床诊断与矫治设计确定拔牙与非拔牙中的应用价值。

R ESULT S: Strong specific staining for Smad1,4,5 was detected in the odont oblasts of normal and carious teeth. Weaker staining was observed in the u nderlying cell-rich layer and pulp core.

结果：Smad1，4，5在正常和龋坏牙髓的成牙本质细胞层呈强阳性表达，在下方的富细胞区及牙髓中心部位为阳性或弱阳性表达，炎症牙髓浸润的炎细胞中Smad1，4，5呈强阳性表达。

Roast a porcelain tooth of probably age segment at 20-60 years old of, it needs to fix an original tooth to whet very thin 1 F before making, because the Heng tooth of teenager didn't develop completely, Sui chamber generous, easily wound and tooth Sui.

烤瓷牙的大概年龄段在20-60岁之间，它在制做前需将原有的牙修磨很薄一层，因青少年恒牙未发育完全，髓腔宽大，容易伤及牙髓。

METHODS: Broken roots of fifteen patients dislocated into maxillary sinus during teeth extraction were removed by negative pressure drainage, irrigation of maxillary sinus and filling gauze piece into maxillary sinus through tooth extraction wound.

对在拔牙过程中断根进入上颌窦的15例患者，应用经牙槽窝吸引法经牙槽窝上颌窦冲洗法、经牙槽窝上颌窦纱条填塞法进行手术取出断根。

It's regarded as a dentin specific protein, The gene structure and the expression pattern of DSPP at transcript level are well known in recent years, however, the expression pattern of DSPP protein, and it's possible role during tooth development and dental pulp reparation after injury are not clear yet.

近年来，DSPP的基因结构及mRNA水平的表达模式已较清楚。蛋白印迹实验证实小鼠牙胚中有DSPP蛋白的存在。但是，DSPP在蛋白水平的表达模式如何？它的生物学功能和作用机制是什么？它在牙髓损伤修复中的作用又如何？目前国内外均未见报道。这些问题的研究，对我们在该蛋白后基因水平的了解具有重要意义，也为我们深入了解牙本质生物矿化机制、对牙体组织疾病和损伤进行生物性防治提供理论依据。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。