牙形成

Baby bottle tooth decay can be said of children's serious tooth decay, its causes and adults in general similar to tooth decay, but also has its special formation background.

奶瓶性蛀牙可说是幼儿的严重蛀牙，其原因和大人一般蛀牙类似，但也有其特殊形成的背景。

The calcium hydroxide cement containing BEMA or EMA and HEMA as resin matrix has good properties. The pulp capping test showed that an ex...

以BEMA或EMA和HEMA为树脂基体材料，凝固后具较好的整体性能，在狗牙上盖髓70天后，可见牙髓组织内形成完整的牙本质桥，显示出良好的盖髓效果。

In practice, this is because just before the out of teeth, root is not fully formed, the pulp cavity and apical foramen are large, thin apical cementum caused.

实际上，这是因为之前出牙，根尚未完全形成，牙髓腔和根尖孔大，薄根尖牙骨质造成的。

BACKGROUND: Hydroxyapatite has favorable biocompatibility, can protect pulp tissue and promote the formation of osteoid dentin and the concrescence of pulp tissue.

背景：羟基磷灰石具有良好的生物相容性，可保护牙髓组织，促进骨样牙本质的形成和牙髓组织的愈合，但无抗感染能力。

The complicated process of cellular differentiation needs the cooperation of many kinds of growth-factors, ground substance and cellular characteristics and the preciselymechanism of this process has not been illuminated yet, although many kinds of hypothesis has been posed.

19世纪后期以来，对气体信号分子的一些研究显示，NO及其酶系统一氧化氮合酶(Nitric Oxide Synthase，NOS)在牙髓组织中广泛分布，具有调节血流量和牙髓组织压的作用，还可能与牙本质形成、细胞分化等生理过程相关。

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。

Constant embryonic tooth development began in the first 4 weeks to 9 months to form, the lower total of 28 permanent tooth germ.

恒牙胚的发育始于胚胎第4周，至第9个月形成上、下颌共28个恒牙牙胚。

AIM: To establish the animal model of reparative dentinogenesis and investigate the histo-morphological feature of reparative dentinogenesis.

目的：建立修复性牙本质形成的动物实验模型，观察修复性牙本质形成的组织形态学特征。

The pathogenesis of root resorption is still not clear. Cementoblast plays a central role in repair root resorption by synthesizing cementum matrix.

成牙骨质细胞是牙骨质的功能细胞，在牙根形成、牙周病牙骨质的再生以及正畸相关炎性牙根吸收的修复中起着重要的作用。

After transplanted in nude mouse for 8 weeks, DAC-MSCs can regenerate cementum-like structures and dentin-like structures. At the same time, we used limiting dilution assay to screen monoclonal cells from DAC-MSCs and discovered two kinds of phenotype cells: one is osteogenesis type, and the other is fibro singtype.

结果显示：牙根发育期根尖复合体来源间充质干细胞为异质性；具有显著的&胚胎性&组织特征：表现出极高的增殖活性、克隆形成能力和体外多向分化能力；在体内可以异位形成类牙骨质和类牙本质样矿化结构。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。