下颌前的

Methods: The three-dimensional finite element model, consisting of tooth, peridental membrane, compact and cancellous bone, was developed.

以电子计算机技术建立了包括牙齿、牙周膜、硬骨板、松质骨和皮质骨的下颌前磨牙三维有限元模型。

This is one of the chief aims in this study.Crossbite of anterior teeth in preadolescent children is one of the most common type of malocclusion in the patients who are characteristic by maxillary deficiency and mandibular prognthism.

替牙期反是临床上较为常见的错畸形之一，患者多表现为上颌发育欠佳，面中1／3凹陷，下颌前突，同其他类型错相比，该类错对患者心理及口颌系统功能的影响是相对较大的。

Objective: To study the stress of mandible premolar under various loadings on its traumatic occlusal spots.

目的：研究不同载荷加载于下颌前磨牙临床常见的创伤性咬合点时牙体组织的应力分布。

The obvious skeletal change can be achieved with the mandibular protraction applicance treatment in early class Ⅱ malocclusion.

下颌前伸矫治器治疗早期Angle二类错牙合可取得明显的骨骼改变。

Mandibular advancement in rats caused cellular changes of condyle,which led to increased Flk-1 expression and endochondral ossification.

下颌前伸后大鼠髁突软骨细胞Flk-1表达增强，说明其介导了VEGF引发的软骨内骨化过程。

After presurgical orthodontic treatment, most of the patients could be treated by one piece surgery, which could simplify the surgical procedure and reduce the relapse rate of surgery.

我国学者也是在70年代初，开始采用正颌外科与口腔正畸联合的方法矫治下颌前突畸形［3］。

Eat cow's milk may be a result of feeding posture is incorrect or improperly positioned to form a bottle of mandibular protrusion or retrusion.

吃牛奶的婴儿，可因吃奶姿势不正确或奶瓶位置不当而形成下颌前突或后缩。

The 4-year-old with a lopsided toothy grimace has an underbite, a large burn scar on his stomach and nails which grow in odd directions.

&帕布斯特&现年4岁，面目狰狞，下颌前突，露出一排歪歪斜斜的大暴牙。它胃部还有长长一条因烧伤导致的伤疤，指甲也长得横七竖八。

OBJECTIVE: To evaluate the fatigue resistance of lower premolars restored with quartz-fiber post-core and full crown.

目的：评价石英纤维桩复合树脂核全冠修复的下颌前磨牙的疲劳抗性。

Methods: Fourty-five mandibular second premolars with single oval-shaped root canal were prepared with step-back technique and filled with warm vertical compaction technique. The teeth were divided into three groups randomly: ProTaper group, Mtwo group and manual stainless group. The operating time was recorded.

45颗具有椭圆形根管的下颌前磨牙经逐步后退法预备、热牙胶垂直加压充填后随机分为3组，分别用ProTaper再治疗器械和ProTaper器械，Mtwo再治疗器械和Mtwo器械，手用H锉和K锉去除牙胶。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐