出牙

Placed in the alveolus in a manner prohibiting eruption into a normal position.

牙齿长不出的在牙槽上处于妨碍新牙长在正常位置的。

Results Maxillary first and second molars were more mesially inclined in the first group, particularly in the younger subjects (16～25 years).

用U检验对两组测量角度的平均值进行比较，Spearman 相关系数估计年龄因素的影响，用Logistic回归分析第三磨牙的萌出与第一磨牙、第二磨牙的轴倾度、性别和年龄之间的关系。

A group: to measure the length of root canal by Root ZX, prepare the root canal and test the trial point for a best position of the major Gutta Percha Point in root canal obturation with lateral compaction, then take X-ray photos.

随机选择需行根管治疗术的单根管恒前牙、双尖牙 2 30颗，分为A、B两组，A组采用RootZX 根管测量仪测量根管长度，根管预备后，根管充填时加试尖步骤，调试出最适主尖后侧压充填根管，摄牙片

Results The vinegar had demineralizing effect on deciduous enamel and decreased the surface microhardness of deciduous enamel.

结果 食醋能导致乳牙牙釉质钙溶出和表面显微硬度下降，随时间延长钙溶出减少，表面显微硬度降低的程度减弱。

Results The vinegar had demineralizing effect on deciduous enamel and decreased the sur-face microhardness of deciduous enamel.

结果 食醋能导致乳牙牙釉质钙溶出和表面显微硬度下降，随时间延长钙溶出减少，表面显微硬度降低的程度减弱。

The enamel surface microhardness was measured by a microhardness tester.results the vinegar had demineralizing effect on deciduous enamel and decreased the surface microhardness of deciduous enamel.

结果 食醋能导致乳牙牙釉质钙溶出和表面显微硬度下降，随时间延长钙溶出减少，表面显微硬度降低的程度减弱。

When food chip was masticated between dentitions, place food chip in posterior occlusion bilaterally.

在双侧后牙区放置食物片的咬合状态下，负载2kg、4kg、6k、8k咀嚼力时，测量并计算出基牙在近远中向、唇舌向、垂直向的位移、倾斜、扭转量，统计分析不同固位力大小对基牙位移影响的意义。

Methods The sample consisted of 2 groups. The subjects in the first group (n = 30) had complete normal dentitions including third molars; those in the second group (n =30) had impacted right and left third molars.

研究样本分为两组，第一组的研究目的确定上颌第三磨牙萌出与第一磨牙和第二磨牙轴倾度的关系。

Secondly, the incisors grow faster, then the beginning of next to no longer permanent, in the "free" environment will, of course, a large growth, but within the next two years to grow permanent incisors on the natural limits; the most important point is that "parents feel that the incisors are the wrong impression", after the permanent teeth will not grow up stereotypes, so on the child's little face, mouth does not match, it appears to "Super", as the children grow up day by day face, bone development, facial development, such as children and adults will face the size of incisors is coordination of the match,"So we say that time will the children from 'ugly duckling' change 'Swan'."

其次，门牙长得快，这时旁边的恒牙都没开始长，在&无拘无束&的环境下当然会生长得大一点，但两年内旁边恒牙长出就自然限制了门牙；最重要的一点是，&觉得门牙大都是家长的错觉&，恒牙定型后不会再长大，所以放在孩子的小脸、小嘴中不匹配，才显得&超级大&，随着孩子脸形一天天长大，骨头发育、面部发展，等孩子成年时门牙就会和脸形大小十分协调、般配了，&所以我们说时间会让孩子由'丑小鸭'变'天鹅'&。

Objective: To study the changes of upper and lower third molar position in patients treated with first premolars extractions.

目的：研究第一前磨牙拔除后对第三磨牙位置变化的影响，探讨影响第三磨牙萌出的客观因素。

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。