牙形成

The results suggest that Smad4,one of the intracellular downstream molecules of TGF-β superfamily,and an inductive signal mediating epithelial-mesenchymal interaction,may regulate the differentiation of ameloblast and odontoblast cells,and modulate dentinogenesis and amelogenesis.

结论首次观察到Smad4信号分子在人牙胚发育过程中的表达，Smad4作为TGF-β超家族细胞内信号分子，可能参与上皮间充质的相互作用，同时也参与成釉细胞和成牙本质细胞的分化以及牙釉质和牙本质的形成。

Cementum is an important mineralized tissue in root formation, however , the precise mechanism of cementum formation remains undetermined.

牙骨质是牙根形成的重要矿化组织，然而，对牙骨质形成机制仍不十分明确。

Objective:To observe the dynamic process of the development of dentin and enamel during their mineralization period.

目的：观察牙釉质和牙本质基质矿化过程的动态变化，为进一步阐明牙釉质和牙本质的形成机制提供依据。

The coalescence that still has already roasted porcelain tooth and radicle tooth is easy gathering germ the spot, the formation tartar, should notice to sweep, the crevice between teeth can be used dental floss from the Jie, and periodical get to hospital of check, Jie tooth.

还有烤瓷牙与基牙的接合处容易聚集菌斑，形成牙石，应注意清洁，牙缝间可用牙线自洁，并定期到医院检查、洁牙。

CaB plays a significant role in differentiation of pulp cell to odontoblast, as well as formation of reparative and reactive dentin.

CaB可能在牙髓细胞向成牙本质样细胞分化及修复性牙本质和反应性牙本质形成过程中起重要作用。

Therefore, in a newly designed three-dimensional cell culture system that fulfils the conditions necessary for odontoblast differentiation (Kikuchi et al. 2002), we examined whether dental papilla cells in rat mandibular incisors could differentiate into tubular dentine-forming cells.

本实验我们设计了另一种新的三维培养模型，来研究成牙本质细胞的分化，并观察大鼠下切牙牙乳头细胞能否形成管状牙本质。

The arrangement of odontoblasts was found in line and there was no inflammation. The root pulp and periodontal tissue were normal. Finally the opened area was closed by dentinal bridge.

周边造牙本质细胞排列整齐，牙髓无炎症及变性，根髓及牙周组织正常，最终形成牙本质桥将穿髓孔封闭使牙髓保存了活力。

Results showed sTGC-CM, which is similar with the effect of hTGC-CM, was able to induce human DPSCs to make odontoblastic changes as indicated by remarkable morphological changes, increased proliferation ability, higher multipotential and colony forming capability, and expression of some odontogenic markers in gene and protein levels,such as DSP, DSPP, DMP1, BSP, OCN, OPN.

结果表明：人牙髓干细胞经过一定时间的猪牙胚条件培养基诱导后，能在细胞形态上和细胞周期上发生改变，能具有更高的克隆形成能力和多向分化能力，能维持更好的干细胞特性，具有更强的增殖能力，表达更高水平的碱性磷酸酶，免疫组化和RT-PCR提示诱导后的牙髓干细胞能在蛋白水平和基因水平表达出一些牙向分化的标志，如DSP、DSPP、DMP1、BSP、OCN、OPN等。

Methods Demirjian′s method was used to assess the dental maturity score and dental age of 445 Chengdu children.

恒牙的形成不会受乳牙早失的影响，因此利用恒牙研究牙龄更为准确和实用。

Weeks, dental plate as part of the rapid proliferation, the formation of upper and lower total of 20 deciduous tooth.

乳牙胚的发生始于胚胎第6周至第7周，牙板的一部分迅速增殖，形成上下颌共20个乳牙牙胚。

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。