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

對148顆根管治療失敗牙進行原因分析，對失敗牙徹底消毒后應用復方甲硝唑根管糊劑再充填免费看黄动漫。

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 ...

以前的牙齒很干凈色综合网久久，但是近半年發(fā)現(xiàn)牙齒的面上以及牙根邊緣有黑色的東西，能夠摳国产看片地址。国产乱伦露脸无码。。

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

結(jié)果 36顆乳前牙看黄的网页，根管治療成功34顆A片黑白配一级福利久久，失敗2顆，成功率94.4%毛片1毛片2毛片3毛片4。

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

在255例黄色大片免费看视频、425個根管治療中用RootZx測量確定根管工作長度。

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.

結(jié)果發(fā)現(xiàn)国产一级a毛一级a看免费视频,附近约爱，兩組的垂直牙根斷裂均好發(fā)於牙冠嚴重磨耗（77.4-88.2%）且扁平的牙根（61.8-75.8%）上无码A片日韩毛片精品，以大臼齒的近心牙根發(fā)生率最高（64-85.7%），多為頰舌側(cè)走向（91.2-91.9%）福利精品最新视频查看，且於未根管治療組別亦發(fā)現(xiàn)三例腭側(cè)根斷裂国产成人中文激情小说网站在线观看，走向為較寬的近遠心方向，顯示牙根斷裂會沿著牙根較寬的方向發(fā)生在线看的免费网站黄2019；同時800AV最新地址，未經(jīng)根管治療而產(chǎn)生垂直牙根斷裂的牙齒具有根叉位置較低的現(xiàn)象（61.8%），牙根於比例上有較短小的特徵天天色狼网。

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水平向后牽引力的作用點升高時日本在线亚洲国产视频看看，上前牙的位移和應力分布趨勢各不相同：切牙的唇舌向位移由冠舌向傾斜逐漸變?yōu)樯嘞蛘w移動和舌向控根移動，尖牙則以冠舌向傾斜位移為主；前牙位移量隨牽引力高度增加而增大国产又长又大又粗又硬视频，但位移趨勢較為穩(wěn)定欧美日韩视频观看一区二区在线；牙周膜應力分布與其位移趨勢相一致。

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.

追蹤觀察時間為6-21月欧美成人顶级精品视频。4例穿孔修補的病例18禁裸露啪啪网站免费网站，均為延遲修補，除一例為根尖1／3處的病理性吸收外欧美一级黄片尤物视频污无毒不卡，其余患牙的穿孔部位位于牙根的冠1／3或根分叉處日韩毛片在线观看，一例6m復查時有3mm的牙周袋形成，其余患牙骨吸收暗影均明顯縮小美女下部隐私扒开视频无遮挡白。7例根尖發(fā)育不全并無髓牙的病例均為成人18禁在线永久免费观看不卡，5例根尖暗影完全消失，2例明顯縮小乱伦小说图片视频。

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.

選擇283 顆乳牙慢性根尖周炎伴竇道的患牙欧美色淫淫， 196 顆用氧化鋅丁香油糊劑充填， 87 顆用Vitapex 充填欧美亚洲日韩ai在线博彩。

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.

選擇2005年6月至12月間本院口腔內(nèi)科行根管治療的120例患者（120顆牙）欧美va在线视频品，隨機分為兩組：試驗組用ProTaper機用鎳鈦銼及冠根向預備技術(shù)預備彎曲根管74個，對照組用不銹鋼K型銼及逐步后退法技術(shù)預備彎曲根管75個日韩视频在线一区第四页。

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噜噜色噜噜网色妞网av、2 teeth failed for post fracture、3 tooth failed for crown loose .The rate of success is 87.72％.

結(jié)果：隨訪兩年欧美成人h版在线观看，其中使用螺紋樁修復57例欧美午夜伦费电影在线观看，良好50例，松動脫落3例亚洲性爱一级，釘折斷2例，患牙根折2例欧美最爽的乱婬视频婬色A片，成功率為87.72％另类亚洲精品网站av。