牙

The experimental group was treated with fluoride iontophoresis and the control group was spread with sodium fluoride glycerine.

选取2只健康成年犬对称生长的28个恒牙，每组7个牙，左右同名牙对照。

Objective To evaluate the feasibility of fixed correction technique (vertical open large flexure overbiting occlusal pad) in treatment of slight～moderate degrees maxillary maldevelopment bony Angle Class Ⅲmalocclusion associated with front tooth crowding.

目的 评价应用固定矫治技术垂直开大曲复合牙合垫在轻至中度上颌发育不足骨性安氏Ⅲ类错牙合伴上前牙区拥挤矫治的可行性。

Objective To explore the clinical curative effect of Frank1 Ⅲ in orthotherapy for anterior malocclusion.

目的 研究FrankelⅢ矫治器对前牙反牙合的临床治疗效果，为临床治疗反牙合提供帮助。

Methods 20 human biscuspids scheduled to be extracted for the orthodontic reasons were prepared for porcelain fused to matal crown,of which every 2 teeth were from the same patient and the same jaw.

目的 观察极固宁TM涂布于金属烤瓷全冠活髓基牙牙预备体表面21 d对牙髓组织学形态的影响。

Based on this background, maxillary central incisors was prepared as residual roots model, the materials which has the similar physical properties and capabilities as that of the alveolar bone and periodontal membrane respectively were chosen.

基于上述情况，本实验以人离体上中切牙制备实验模型，以力学性能近似的材料模拟牙槽骨、牙周膜和桩冠修复后的上前牙，制作与上前牙口内受力角度相同的夹具及压力头，形成加载测试系统。

Stress distribution of the natural periodontal membrane, bionic periodontal membrane and the bone interface of the three models are calculated out by SuperSAP93, when the same load exerted to the three models. Results The stress change of the inside and outside surface of the natural periodontal membrane and bionic periodontal membrane is in the same tendency.

应用螺旋CT对上颌中切牙标本进行扫描，分别建立仿生种植牙、天然牙和骨性结合种植体模型，对3个模型施加同样的载荷，应用Super SAP93软件，计算出天然牙周膜和仿生牙周膜以及3种模型骨界面上的应力分布。

Three years of tram tracks, elastic bands and the removal of eight teeth later, and I am a shining example of the orthodontist's art; but every time one of my children loses a milk tooth, I know it could cost far more than ￡1 for the tooth fairy.

三年的有轨电车、橡皮筋和后来拔掉的八颗牙，把我变成了牙齿矫正艺术的闪亮例证；但是每次我有个孩子掉了乳牙，我就知道那可不是让牙仙女给1英镑就够的了。

As long as you protect the good kid's baby tooth and make the milk sharp tooth shed off and the Heng sharp tooth harbour time of unanimouslyn and then can't influence a tiger tooth.

只要您保护好孩子的乳牙，使乳尖牙脱落和恒尖牙萌出的时间一致就不会影响虎牙。

METHODS: Three-dimensional finite element mandible model was established based on the CT scanning data. The mini-implant was implanted in the region between first mola and second premolar at 30°, 60° and 90° tilted mesiolly, and 30° and 60° tilted occlusally, respectively.

应用颌骨CT扫描图象建立三维有限元模型，在下颌第1磨牙及第2双尖牙间分别以牙合向30°，60°，90°，近中向30°，60°植入种植体，给以水平方向1.96 N 加载。

METHODS: Measurement of palatal raphe area first three-dimensional reconstruction of images at up to nasion plane centerline, whichever was determined as a reference surface plane, selection one point on incisor cervix in this line, to measurement of the available palatal bone height; sagittal views were selected at 6 mm dorsally from the incisive canal. The available bone height was defined as the distance from the palatal baseline (lower cortical border of the palate) to the nasal cavity (upper cortical border of the nasal cavity).

先在三维重建图像上以鼻根为准确定面中线平面为参考平面，在此线上选择1个位于中切牙牙颈部的点，在其矢状位图像上，选取位于口腔内侧骨皮质上距切牙孔后缘6 mm处为标测点，通过此点向硬腭做垂线确定腭骨厚度，测量范围自口腔内腭部骨皮质外侧边缘至鼻腔侧骨皮质外侧边缘。

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。