磨牙

Objective: To investigate the root and canal morpho lo gy of extracted maxillary second premolars.

目的：观察上颌第二前磨牙牙根和根管形态，为根管治疗提供解剖学资料。

Make facial fatigue, eat, speak cause of temporomandibular joint and local myalgia, mouth opening when the joint will of noise, which will burden a child thinking, affecting the quality of life.

磨牙使面部过度疲劳，吃饭、说话时会引起下颌关节和局部肌肉酸痛，张口时下颌关节还会发出响声，这会使孩子有思想负担，影响生活质量。

Results Every group's success rate express that Osteotome technique and Sinus floor elevation is a infective methods when place implant at the upper Molar areas,the patients whichare very lack of bone are further infective if place implant next time.

结果 各组存活率结果表明上颌磨牙区埋入种植体时用骨挤压和填骨法行上颌窦底提升术是提高存活率的有效手段，对骨量严重不足的患者术后二期埋入种植体更安全有效。

Cases that are level from first molar to first molar will still show a deep overbite.

案件的级别从第一磨牙先摩尔仍然显示出深覆。

Enterobiasis a child, when pinworm often go to bed after I climbed up onto the anus to lay their eggs, causing anal itching, children do not sleep peace molar phenomena also occurred in the evening.

有蛲虫病的孩子，每当睡觉后蛲虫常爬到肛门口产卵，引起肛门瘙痒，孩子睡不安宁也发生夜磨牙现象。

METHODS: Micro_CT was used to scan the intact maxillary first premolar. Import the CT images to Mimics V8.1 software and prefabricate the 3D model.

用Micro_CT对选取的完整人上颌第一前磨牙进行扫描，将获得的CT影像通过Mimics V8.1软件进行拟合，初步形成三维模型。

METHODS摘要: Micro_CT was used to scan the intact maxillary first premolar. Import the CT images to Mimics V8.1 software and prefabricate the 3D model.

方法摘要：用Micro_CT对选取的完整人上颌第一前磨牙进行扫描，将获得的CT影像通过Mimics V8.1软件进行拟合，初步形成三维模型。

Objective : To observe the effects of using casting post-core and prepared metal screw-post in post-core-crown restoration of premolar.

目的：观察比较铸造桩核和成品金属螺纹桩在前磨牙桩核冠修复中的临床效果。

Objective: To establish a 3D solid and finite element model of maxillary premolar restored witll MOD inlay.

目的：建立近中一合面一远中洞型嵌体修复下颌第一磨牙的计算机三维实体和有限元模型，并进行初步应力分析。

In our prophase research,we have found that sfrp3 and Wnt5a were expressed in molar.

前期研究发现，在早期牙齿发育阶段，sfrp3和Wnt5a在磨牙间充质中都有表达。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。