牙周膜

Positive staining of Stro-1 was found in 7.6% of SCAP. Morphologically, PDLSCs were fusiform-shaped, with many short and long ramifications under a scanning electron microscope, and the secreted extracellular matrix were around them.

透射电镜下可见，第1～3代牙周膜干细胞及根尖牙乳头干细胞生长良好，胞浆内线粒体，高尔基体和粗面内质网丰富，随着培养时间的延长，分泌的细胞外基质增多。

On the other hand, extract of cemental matrix was separated and clarified from healthy teeth which were extracted because of orthodontic treatment.

从因正畸需拔除的健康牙体表面获得牙骨质基质提取物，分别观察不同作用时间、不同浓度的牙骨质基质提取物对牙龈成纤维细胞和牙周膜成纤维细胞在牙体表面附着的影响。

The extract of cemental matrix can enhance the initial attachment of HGF and HPC on the root surface.

牙骨质基质提取物能够促进牙周膜细胞在牙根表面上的附着。

Results: The extract of cemental matrix could enhance the initial attachment of human gingival fibroblasts and human periodontal cells to the surface of root, and such effects were strengthened with increasing density and time.

且牙骨质基质提取物促牙周膜成纤维细胞附着的作用高于对牙龈成纤维细胞的作用。

Results MMP-2 immunohistochemical results indicated that the MMP-2 expression increased and was observed on both sides periodontium of movement tooth, osteoclast, cementoblast, osteocyte, fibroblast and osteoblast appeared positive.

结果MMP-2免疫组化结果显示牙齿移动后，牙周膜两侧MMP-2表达增加，破骨细胞、骨细胞、成纤维细胞和部分成骨细胞MMP-2染色阳性。

The relative cell groth rate of L929 cell represented the proliferation of cells on materials with respect to control over time. The result showed that cytotoxicity of thermo-sensitive cell culcure dish was none or little,which can be used for lab use.Additional cell culture was performed with two types of celland cell sheets detachment were observed by reducing the culture tempareture after the confluently growth of the two types of cells.

进一步利用两种不同的细胞永生化的成牙本质细胞系和人牙周膜细胞在接枝有PNIAPm的培养皿上进行培养，观察到细胞可以正常贴壁，生长并增殖，并且在形成连续的细胞层之后，通过降低温度，获得了完整的细胞层结构，结合前两部分实验结果，证实了利用等离子体预处理和紫外线照射接枝制备温敏性培养皿的可行性，为后续研究提供了实验基础。

Non-occluding teeth with a hypofunctional periodontium have a lower rate of bone remodeling, and are more susceptible to the injury in periodontal tissues caused by orthodontic force than normally occluding teeth, such as hyalinization or undermining bone resorption, even dentin resorption.

正畸治疗中，无咬合接触的牙周膜废用性萎缩牙较正常咬合接触牙对矫治力反应差，骨改建率低，易发生玻璃样变和潜掘性骨吸收，延缓牙移动，因此对无咬合接触牙的临床治疗中应采用轻力。

After being loaded with horizontal retraction force at various height, displacement and stress distribution of anterior teeth was not well-distributed. Labiolingual displacement of incisors varied from crown lingual tipping to lingual translation and lingual controlling root movement, while canine mainly showed crown lingual tipping. The displacements of teeth increased with the length of hook but their moving tendency remained unchanged. Stress distribution in PDL was in accordance with teeth displacement.

2水平向后牵引力的作用点升高时，上前牙的位移和应力分布趋势各不相同：切牙的唇舌向位移由冠舌向倾斜逐渐变为舌向整体移动和舌向控根移动，尖牙则以冠舌向倾斜位移为主；前牙位移量随牵引力高度增加而增大，但位移趋势较为稳定；牙周膜应力分布与其位移趋势相一致。

Results: Immunohistochemical staining revealed that expression of RANKL protein was detected in periodontal ligament cells and osteoclasts which mostly located in resorption lacunae.

结果：正畸牙移动压力侧组化结果显示，RANKL阳性表达位于牙周膜细胞和位于骨陷窝内的破骨细胞中，在正畸牙移动第3、5和7天时呈强阳性表达。

Methods 40 cases were selected,and comparing the peri odontal ligament injection through using the computerized local anesthetic delivery with traditional manul local anesthesia.

方法选择40例病人，采用无痛局麻注射仪进行牙周膜浸润麻醉，并与传统的手推式麻醉方法对比。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。