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The following values was measured: angle of cusp line between the second and third molar, impact state and depth, distance from Rickett's Xi to distal cusp of third mandibular molar along the occlusal plane, anterior border of ramus to the third mandibular molar, distance from projection of distal contact point of maxillary third molar to intersection of pterygoid vertical on occlusal plane.The change between pre-and post-treatment was calculated and analyzed with SPSS10.0 software package.α angle, Xi-LTM, R-LTM, R-LTM were tested with independent-sample t test, impact state and depth was tested with Chi-square test. Influence of age on the values was also evaluated.

测量治疗前后的第二、第三磨牙牙尖连线角度、阻生状态和深度,Rickett's Xi点到下颌第三磨牙远中尖距离、下颌支前缘到第三磨牙远中尖距离、翼上颌裂切线到上颌第三磨牙后缘的距离及上、下磨牙的前移量,计算治疗前后各变量的差值,采用SPSS10.0软件包进行统计学分析,α角、Xi-LTM、R-LTM、R-LTM用t检验,阻生状态和深度用χ^2检验,比较年龄因素对各指标的影响。

(1) The 2% glutaraldehyole pulpotomy has the function of killing bacteria and could cure deep caries and early pulpitis;(2) The curative effects of six months after operation is better than that of three months and of upper jaw is better than that of lower jaw by using 2% glutaraldehyole pulpotomy;(3) The prognosis of 2% glutaraldehyole pulpotomy depends on selecting indication and the patients cooperation in the course of operation;(4) It must be early performed with the root canal therapy that the cases of further developing apicitis, the absorption of root apiex is over 1/3, the pulp necrosis and periapical disease.

(1) 2%戊二醛活髓切断术具有杀菌的功能,对于深龋及早期牙髓炎可以治愈;(2) 2%戊二醛活髓切断术治疗乳磨牙牙髓炎六个月后的疗效明显好于三个月的疗效,上颌组疗效明显好于下颌组;(3) 2%戊二醛活髓切断术的预后取决于适应证的选择及治疗过程中患儿的配合程度;(4)对于进一步发展为根尖炎的病例及根尖吸收超过1/3、牙髓坏死和根尖周有病变者,应及早行根管治疗术。

Xin Hua Hospital,Tongzhou District,Beijing101100. Objective To find an easy and effective therapy to cure patients with pulp necrosis or chronic pe-riapical periodontitis.Methods 184patients(age18~60)with184infected permanent teeth were randomly divided into two groups.The experimental group was filled with the VITAPEX paste plus gutta percha.

目的 针对牙髓坏死、慢性根尖周炎病例,探求简便有效的治疗方法方法在临床选择18~60岁的牙髓坏死、慢性根尖周炎病例184例,184颗患牙,随机分两组,第一组采用VITAPEX糊剂加牙胶尖一次法根充治疗完成。

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。

Circumstance.②Help an assurance bad tooth:Insert tooth gum such as the Lou tube of of two tooths the point make a tooth slice check, can show tooth gum the point is been partial to to some one tooth.

帮助确定病牙:如两牙之间的瘘管插入牙胶尖作牙片检查,可以显示牙胶尖偏于某一牙齿。

On the termination date, the cultured explants were all examined by Western blot, HE and transmission electron microscope. Our results showed that after 12-days in culture, the cultivation treated with AS-ODN reduced the synthesis of AMBN and had a deformed dental cusp with thinner enamel matrix. Ultrastructure analyses showed that there was hardly any cisternae of the rough endoplasmic reticulum in the ameloblasts at the tip of the cusp of AS-ODN treatedexplants. However, on average the enamel matrix was thinner compared with that in the control group. Furthermore, the collagen fibers in extracellular matrix were found disorganized. These findings seemed to provide a direct experimental evidence that tended to indicate that the arrested AMBN translation in cultured tooth germs might result in the delay of the tooth development.

经用Western蛋白印迹检测表明,所设计的反义核酸对AMBN InRNA具有良好的封闭效果并成功阻断了牙胚对AMBN的表达;在缺乏AMBN情况下,与对照组相比,实验组牙胚在体外可以继续生长发育至钟状晚期,出现成釉细胞和成牙本质细胞的分化,成釉细胞可以分化成为分泌期型成釉细胞,胞浆中缺少合成蛋白质所必需的粗面内质网和高尔基氏体,缺乏溶酶体,表明对蛋白合成和脚的能力降低;实验组牙胚有牙尖形成和基质分泌,但牙尖形态异常,基质形成减少,牙尖周围基质最厚处为O.6卜m,明显薄于对照组的5.spin,基质中胶原纤维粗细不等,排列稀疏, 3 第四军医大学硕士学位论文未见钙化现象,充分证明了AMBN在牙胚发育中参与釉质基质形成和矿化过程,影响胶原纤维和牙本质基质的合成,促进成釉细胞对蛋白质的合成和釉质基质蛋白降解。

67 of old person latent to split tooth carry on clinical diagnosis, adopt the complex treatment method according to different situations to 63. 4 shallow form latent to split tooth, dental pulp normal having subjective symptoms to be only competent to transfer tooth treat jointly; Have deeper crackle as to 5, the vigor of dental pulp is normal, but there is trouble tooth of dentine irritated symptom, prepares against the hole, is filled with on the crack while adjusting the tooth contract; Pulpitis, 22 58 drops of trouble tooth with the sharp disease, symptom of the root already appear to 36, go ahead of the rest steel wire ring pitch or make, bring ring bonding in order to protect corona, rub except that high sharp abrupt slope, after dispelling the tooth and shutting the wound, the root canal with complete regeneration, observe for 2 weeks, after there is no clinical symptom, preceded and repair completely in time.

对63例老年人67颗隐裂牙进行临床诊断,并根据不同情况采用了综合治疗的方法。4颗浅表的隐裂牙,牙髓正常且无自觉症状仅行调牙合治疗;对于5颗有较深裂纹,牙髓活力正常,但有牙本质过敏症状的患牙,调牙合同时在裂隙处备洞、充填;对36颗已出现牙髓炎、22颗伴有根尖病症状的58颗患牙,先行钢丝环扎或做带环粘结以保护牙冠,磨除高尖陡坡,消除牙合创伤后,再行完善的根管治疗,观察2周,无临床症状后,及时做全冠修复。

IM: To investigate the effects of occlusal surface anatomy on stress distribution around apex in mandible.

目的:探明正常牙合与重度磨耗牙合两种不同牙合型时各牙根尖应力分布的特征,以期揭示牙的解剖形态及牙尖高度的改变对咬合力传导的影响规律。

The teeth and claws of capitalism will be blunted, and we will see the return of forms of state corporatism familiar to those of us who lived and worked in the 1970s.

资本主义的尖牙利爪将不再锋利,我们将看到生活在20世纪70年代的人们所熟悉的国家法团主义的回归。

Comparing with elastic chain, there are higher distal moving rate and more permanent biological effects in coil spring.

螺旋弹簧拉尖牙向远中移动速率较快,产生的生物学效应较强而持久。

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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。

I'm running my simile to an extreme.

我比喻得过头了。