牙

Apoptosis are found in rat normal and inflammatory dental pulp, and it may have a important role in pulpitis.

正常牙髓和炎症牙髓中存在细胞凋亡，细胞凋亡在牙髓炎的转归和预后方面可能有一定的作用。

Expression of ET-1 in pulpitis was stronger than that of normal pulp.

结论与正常牙髓组织相比，炎症牙髓组织中内皮素-1表达增强，提示内皮素-1在牙髓炎发展过程中起一定作用。

Methods: Model of experimental rat pulpitis was established and ICAM-1 expression of normal dental pulp, pulpitis of immediate group,1 day ,3 days, 5 days, 7 days was analyzed by using immunohistochemical and image analysis technique.

建立大鼠实验性牙髓炎模型，用免疫组化法及图像分析技术检测正常牙髓、牙髓炎即刻组、1天组、3天组、5天组、7天组中ICAM-1的表达情况。

Apoptosis are found in rat normal and inflammatory dental pulp, and it may have a important role in pulpitis.Key words apoptosis;pulpitis;TUNEL method;rat

正常牙髓和炎症牙髓中存在细胞凋亡，细胞凋亡在牙髓炎的转归和预后方面可能有一定的作用。

The follow-up periods were various from 6m to 21m. The apical MTA barrier technique was used to manage pulpless permanent teeth with incomplete root formation. The postoperative radiographs showed complete repair of periradicular tissue in 5 of 7 teeth and improvement obviously in other 2 teeth. Only one case (1 tooth) had a 3mm periodontal pocket in four perforation repair cases. The lesion at the perforation sites was improved obviously.

追踪观察时间为6-21月。4例穿孔修补的病例，均为延迟修补，除一例为根尖1／3处的病理性吸收外，其余患牙的穿孔部位位于牙根的冠1／3或根分叉处，一例6m复查时有3mm的牙周袋形成，其余患牙骨吸收暗影均明显缩小。7例根尖发育不全并无髓牙的病例均为成人，5例根尖暗影完全消失，2例明显缩小。

Methods: We established an experimental model of rat molars pulpitis, used homemade Calcium hydroxide compound as pulp-cap in pulpotomy of rats' teeth, Calvital and blank were det as the control groups. Forty rats' teeth in each group were observed using light microscope 4 and 12 weeks after pulpotomy.

建立大鼠早期牙髓炎的模型，应用自制氢氧化钙复合制剂作为鼠牙牙髓切断术的盖髓剂，以calvital作对照组及无盖髓剂作为空白对照组。

"What we're hoping to have happen is to catch early and remineralize them," said Sally Marshall, a professor at the University of California at San Francisco.

牙釉质和牙本质构成牙体最坚固的部分，它们将取代金或陶器填充物用于恢复牙齿的正常功能。

Results Resinic artificial teeth deposited with 50nm amorphous diamond film after pretreated with polarization are most close to the natural enamel. Conclusion Nanometer amorphous diamond film improves significantly the wearing resistance of resinic artificial teeth.

结果：纳米非晶金刚石薄膜能显著提高树脂人工牙耐磨性能；两种预处理方法中，极化法实验组的耐磨性能明显优于紫外光照法实验组；极化处理后镀膜50nm的人工牙的耐磨性能最接近于天然牙釉质。

Class II division 1 malocclusion is common in clinic, in which patients with descrepency often appear mandible retrusion. It has an adverse effect on growth, beautiful outlook and psychological develepment.

安氏Ⅱ~1类错牙合是临床常见的错牙合畸形，其中很多Ⅱ类错牙合的儿童存在下颌后缩，严重影响了儿童的生长发育、颜面美观和身心健康。

Most Angle class two division one subdivision malocclusion with mandibular retrusion have their characteristic condylar movement style, the difference from that of normal occlusion maybe correlate to condylar position, overbite and overjet.

下颌后缩型安氏Ⅱ类1分类错牙合的髁突运动轨迹有较典型的特征，可能与其髁突位置、前牙覆牙合覆盖有关。

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