查询词典 teeth root

Methods The failure factors were analyzed in 148 teeth treated in the root tubes of teeth.

对148颗根管治疗失败牙进行原因分析，对失败牙彻底消毒后应用复方甲硝唑根管糊剂再充填。

Before teeth are clean, but over the past six months found that the surface of the teeth and the root edge of black things, be able to pull ...

以前的牙齿很干净，但是近半年发现牙齿的面上以及牙根边缘有黑色的东西，能够抠。。。

Results 36 cases with 34 cured teeth and 2 failed teeth in the root canal therapy. The successful rate is 94.4%.

结果 36颗乳前牙，根管治疗成功34颗，失败2颗，成功率94.4%。

Methods:Totall 255 teeth 425 root canals required root canal therapy were measured with Root Zx.

在255例、425个根管治疗中用RootZx测量确定根管工作长度。

Using stereomicroscope, we observed the fracture line direction and location as well as the angle between the fracture line and the attrite plane. The data was compiled into statistics and analyzed. The results revealed that most of the vertical root fractures occurred in teeth with severe attrite crown and flat root. Numerous bucco-lingual oriented fractures occurred in the mesial root of molars, and we found three non-endodontically treated cases with mesio-distal oriented fractures in the palatal roots.

结果发现，两组的垂直牙根断裂均好发於牙冠严重磨耗（77.4-88.2%）且扁平的牙根（61.8-75.8%）上，以大臼齿的近心牙根发生率最高（64-85.7%），多为颊舌侧走向（91.2-91.9%），且於未根管治疗组别亦发现三例腭侧根断裂，走向为较宽的近远心方向，显示牙根断裂会沿著牙根较宽的方向发生；同时，未经根管治疗而产生垂直牙根断裂的牙齿具有根叉位置较低的现象（61.8%），牙根於比例上有较短小的特徵。

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。

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: In all the 283 teeth, the root canal of 196 teeth were obturated with paste zinc oxide- eugenal; the other 87 teeth were obturated with Vitapex.

选择283 颗乳牙慢性根尖周炎伴窦道的患牙， 196 颗用氧化锌丁香油糊剂充填， 87 颗用Vitapex 充填。

Methods: One hundred and twenty teeth with curved root canals were randomly divided into 2 groups: 74 curved root canals in group PT were prepared by ProTaper rotary Nickel-Titanium file with crown-down technique, and 75 curved root canals in group SS were prepared by K-files with step-back technique.

选择2005年6月至12月间本院口腔内科行根管治疗的120例患者（120颗牙），随机分为两组：试验组用ProTaper机用镍钛锉及冠根向预备技术预备弯曲根管74个，对照组用不锈钢K型锉及逐步后退法技术预备弯曲根管75个。

Results:With 2 years following study,in the cement screw post group 50 of total 57 teeth were good, 2 teeth failed for root fracture、2 teeth failed for post fracture、3 tooth failed for crown loose .The rate of success is 87.72％.

结果：随访两年，其中使用螺纹桩修复57例，良好50例，松动脱落3例，钉折断2例，患牙根折2例，成功率为87.72％。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。