牙

The technique of SSD and MPR with Dual-slice spiral CT scanning may obtain the images which can satisfy clinical necessity. This 3-D images in combination with section may supply vast information about impacted teeth in maxilla clinically. It can be used as one exact examining instrument for treatment. maxilla unerupted teeth; spiral CT; 3-dimensional reconstruction

双排螺旋CT表面遮盖法和多平面重建技术能获得满足临床需要的三维图像和多平面重建图像，联合断面图像可为临床提供上颌埋伏牙的大量信息，可作为埋伏牙治疗进一步的精确检查手段。

Objective To evaluate the possibility of unsymmetrical extraction treatment of patients with severe deep overjet.

目的 探讨前牙重度深覆盖患者非拔牙矫治的可能性。

Bone reconstruction following uprighting of impacted third molars.

悬吊竖直阻生第三磨牙后牙槽骨改建情况。

Root canal treatment or endodontics is used to save the tooth when the dental pulp (blood vessels and nerve in the centre of the tooth) dies and the tooth becomes infected.

根管治疗或牙髓是用来保存牙齿时，牙髓（血管和神经在该中心的牙齿）去世和牙齿，成为感染。

Methods: The study included 10 patients (Male: 4, Female: 6; average age: 41.5) accessioned during May 2007 to August 2009 in Peking University School of Stomatology. The provisional restorations were delivery on implant after 3-6 months healing period of the implant.

2007年5月至2009年8月在北京大学口腔医院种植中心接受上颌前牙种植修复的患者10人（男4人，女6人，平均年龄41.5岁）共14个牙位，种植体骨结合完成后采用种植体支持的暂时冠对牙龈成型3~6个月。

The width of alae nasi(5 257-7 896mm)can be used as reference to select the total width of anterior teeth crown in maxilla in complete denture .

鼻翼宽度测值为5257－7896mm，可做为全口义齿选上颌前牙牙冠总宽度的参考标准。

Because the gum atrophies part only a tooth seldom of, usually is all one, now that have a tooth because of atrophying but shed off, periphery of tooth's appearing an atrophic risk is very big, if is a sustaining good tooth loose, will make the whole row roasted a porcelain tooth to shed off together.

因为牙龈萎缩部分很少只有一个牙齿的，通常都是一片，既然有个牙齿因萎缩而脱落，周边的牙齿出现萎缩的危险性是非常大的，如果作为支撑的好牙松脱，就会导致整排烤瓷牙一起脱落。

There was significant difference of △E between group A and C on the 28th day (P.05). CONCLUSION: Tooth colour would relapse after beaching in natural saliva, artificial saliva and deionized water, which may be related to the alternation of the tooth structure.

在体外条件下，牙漂白后颜色可发生回复，1周达到稳定；颜色回复可能与漂白后牙体组织矿物质结构的改变有关。

CH was used in intracanal medicament and root canal filling in CH group and compared with camphorated paramon-chlorophenol,formacresol,iodine-potassium iodine group.

结果 CMCP、FC、IPI、CH组根管治疗期间的急症发生率差异非常明显，疼痛指数亦以CH组最低；1年后牙根吸收情况和 2年失牙率、牙再植成功率CH组与其它组有非常显著差异。

Part n We counterchecked the patients in one week,, and compared the activity of the pulp with preoperational conditions.

二、采用观察法复查患者。l周后患者来院复查，了解患者1周内是否有不适感，牙髓活力仪检测患者的牙髓活力的变化，并与术前进行比较。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失