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premolar teeth
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  前磨牙
     Methods Thirty premolar teeth were randomly divided into three groups(n=10) :group A:Er ∶YAG laser +Excite bond;
     方法选用30颗前磨牙随机分为3组,每组10颗牙齿,A组:Er∶YAG激光+Excite黏接剂;
短句来源
     It expressed as excessive occlusal contact force in anterior teeth in 15 cases, excessive occlusal force in premolar teeth in 9 cases and significant unbalanced contact force distribution between the two sides of the dental arc in 5 cases.
     牙合异常的主要表现为前牙区牙合接触力过大(15例)、前磨牙区牙合接触力过大(9例)及牙弓两侧牙合接触力分布明显不对称(5例)。
短句来源
     MATERIALS:The HPLF were obtained from the middle part of 1/3 periodontium of 12 to 16-year-old youth whose 20 healthy permanent premolar teeth should be extracted for orthodontic need.
     材料:牙周膜成纤维细胞:取自因正畸需要拔除的20颗健康恒前磨牙的12~16岁青少年牙根中1/3牙周膜组织。
短句来源
     Results The results showed significant differences in reducing the decalcification with boosting up the remineralization from the enamel of teeth between the experiment team and antitheses team with different concentration of fluoride foam(P<0.01). But the results showed no significant differences in reducing the decalcification with boosting up the remineralization from the enamel of teeth between premolar teeth with 0.60% fluoride foam and premolar teeth with 0.92% fluoride foam(P>0.05).
     结果在使用不同浓度的氟化泡沫实验组与对照组之间,对减少牙釉质脱矿作用,增强牙釉质的再矿化具有显著性差异(P<0.01),而前磨牙同一条件下0.6%氟化泡沫与0.9%氟化泡沫对对减少牙釉质脱矿作用,增强牙釉质的再矿化作用相比较无显著性差异(P>0.05)。
短句来源
     METHODS: The specimens used in this study were 40 maxillary premolar teeth obtained from patients. The premolars were grouped according to age: group A(10-16yr), group B(20-39yr), group C (40-59yr)and group D (over 60yr);
     方法:按 4个年龄组分别收集拔除的上颌前磨牙,A组:13-16岁,B组:20-39岁,C组:40-59岁,D组:60岁以上;
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  “premolar teeth”译为未确定词的双语例句
     Results Achievement ratio in front teeth that dilled through pulp chamber was 100%,10 of 12 premolar teeth succeed,account for 91.7%;
     结果15个前牙钻孔成功率100%; 12个双尖牙10个成功,占91.7%;
短句来源
     The MO/DO cavity of premolar after root canal therapy was filled with amalgam ,it's strength fracture was lower than unaltered premolar teeth (p<0.01) .
     根管治疗后用银汞充填开髓洞,其抗折强度与完整牙相同,充填MO/DO洞,其抗折强度则显著低于完整牙(P<0.01)。
短句来源
     Methods After removing the Beagle dogs' anterior and premolar teeth,titanium implants were placed in their mandibular alveolar on the 1st,3rd,6th,9th,12th,15th,20th and 30th day before the dogs were sacrificed.
     方法建立Beagle狗牙种植体模型。 分别于取材前1天、3天、6天、9天、12天、15天、20天、30天8个时间段各植入4颗种植体。
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     Clinical trial of resin-bonded fixed partial denture incorporating an attachment used to replace single anterior or premolar teeth
     微型固位钉式无冠粘结固定义齿的临床应用研究
短句来源
     Method : Sixty premolar teeth without dental carries which were extracted because of orthodontics were assigned into two groups randomly.
     方法:选择因正畸需要拔除无龋双尖牙60颗,随机分为两组。
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  相似匹配句对
     X micro matric restorations in permanent anterior and premolar teeth.
     X微基质修复材料修复恒前牙、恒前磨牙的临床状况。
短句来源
     Package to the Teeth
     包装到唇齿之间
短句来源
     The Story of Teeth
     牙的故事
短句来源
     60 premolar teeth extraced for orthodontic purposewere divided into five groups.
     选择正畸减数双尖牙60颗,分为五组。
短句来源
     Methods for premolar root canal preparation
     前磨牙根管预备方法的实验研究
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  premolar teeth
In the prototype demonstration, un-restored, extracted premolar teeth were investigated and the results indicated >amp;gt;20-fold impedance differences between sound and carious teeth, by which caries could be identified in a consistent manner.
      
PDL cells, obtained from premolar teeth extracted for orthodontic reasons, were cultured with Dex (0-1000 nM) for 7 days prior to PTH (1-34) stimulation.
      
Pulpitis and apical periodontitis were induced by pulp exposure and contamination by the oral flora in the premolar teeth of six mongrel dogs, comprising four experimental groups (36 root canals).
      
Bilateral maxillary premolar teeth of two fresh human cadavers were extracted and ? 4.1?×12?mm Straumann TE? implants were placed in the sockets of first and second premolars by utilizing mesio-distal and palatal anchorage, respectively.
      
The material consisted of 18 extracted premolar teeth that were cut in mesial-distal direction and pairwise assigned to either test or control samples in an experimental caries model.
      
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The mental and mandibular foramina of 500 adult Chinese mandibles were studied. Mandibles whose mental foramina lie beneath the second premolar tooth account for 78.0±1.3%. The index of anteroposterior positions of mental foramina is 27.1 in males and 27.4 in females. The index of upward and backward positions of the foramina in males and females are 50.8 and 49.4 respectively. The most common shape of mental foramina is oval, such mental foramina making up 80.9±1.24% of the total. The average dimension...

The mental and mandibular foramina of 500 adult Chinese mandibles were studied. Mandibles whose mental foramina lie beneath the second premolar tooth account for 78.0±1.3%. The index of anteroposterior positions of mental foramina is 27.1 in males and 27.4 in females. The index of upward and backward positions of the foramina in males and females are 50.8 and 49.4 respectively. The most common shape of mental foramina is oval, such mental foramina making up 80.9±1.24% of the total. The average dimension of the foramen was measured, being 4.05mm×3.30mm in males and 3.94mm×3.16mm in females. The average distances from the lowest margin of the mandibular foramen to the mandibular notch and to the basal margin, the anterior and posterior of the mandibular ramus in males and females are 26.5±0.15mm and 24.1+0.18mm, 29.6+0.13mm and 26.9+0.17mm, 20.3±0.10mm and 19.1±0.12mm, and 16.8±0.09mm and 15.0+0.11mm. The indexes of anteroposterior positions of mandibular foramina are 54.6 (in males) and 55.9 (in females)and those of the upward and downward positions of the mandibular foramen are 46.7 (in males) and 47.2 (in females). Sex difference is statistically significant. However, no statistical difference was found on both sides.

对500个成人下颔骨的颏孔和下颌孔进行了研究。颏孔与第二前磨牙相对的最多,占78.0±1.3%。颏孔前后位置指数和上下位置指数,男性分别为27.1及50.8,女性为27.4及49.4。颏孔以卵圆形最多,占80.9±1.24%。颏孔的大小,男性为4.05mm×3.30mm,女性为3.94mm×3.16mm。颏孔开口朝后上者占88.7%。下颌孔至下颌切迹、下颌支的下缘、前缘及后缘的距

AbstractThe aim of this study is to determine the preventiveeffect Of F-Mo preparation on artificial rootsurfacecarles.60 premolar teeth extraced for orthodontic purposewere divided into five groups. A window was preparedon every tcoth. They were treated by 10%(NH_4)_2MoO_2F_4 , 38%Ag (NH_4)_2F, 2% NaF, 7. 3%(NH_4)_2MoO_4 and deionized water for 2 minutes andthree times. They were then put in the fluid containedcariogenic bacteria for 96 hours to produce root caries.The root surface lesion of every tcoth...

AbstractThe aim of this study is to determine the preventiveeffect Of F-Mo preparation on artificial rootsurfacecarles.60 premolar teeth extraced for orthodontic purposewere divided into five groups. A window was preparedon every tcoth. They were treated by 10%(NH_4)_2MoO_2F_4 , 38%Ag (NH_4)_2F, 2% NaF, 7. 3%(NH_4)_2MoO_4 and deionized water for 2 minutes andthree times. They were then put in the fluid containedcariogenic bacteria for 96 hours to produce root caries.The root surface lesion of every tcoth was examined andanalysed by micro-radiography , SEM and spectrum.The result showed that the lesion depth of thegroups treated by 10% (NH_4)_2MoO_2F_4 and 38%Ag(NH_4)_2F were significantly smaller than the othergroups, and the surface of windows are more integrateand smcoth, and mean mineral concentration is morehigher than those of the other groups.It can be concluded that 10% (NH_4 )_2MoO_2F_4 solu-tion has greater inhibit effect to the development of rootcaries, so as the 38% Ag(NH_4)_2F solution. But the for-mer discolored the tooth much less than the latter.

通过对人工根面龋实验研究,以确定10%氟钼酸铵溶液的防龋作用。选择正畸减数双尖牙60颗,分为五组。根面实验区分别用10%氟钼酸铵、38%氟化氨银、2%氟化钠、7.3%钼酸铵溶液及去离子水处理后,所有标本在混合培养的三种致龋菌菌液中形成人工根面龋。经对各组标本的软X射线照片图象分析、扫描电镜与波谱观测表明:10%氟钼酸铵组与38%氟化铵银组根面人工龋损相似,较其它组明显窄,而表面层增宽,表面较完整,孔洞少,钙离子相对含量也高。因此认为10%氟钼酸铵溶液不仅对根面龋发生、发展有抑制作用,并克服了氟化氨银使牙齿着色的缺点,是预防根面龋较理想的试剂。

Objective: To further approach the relationships between the occlusal factors and bruxism. Methods: The occlusal contact conditions of 34 patients with bruxism were studied quantitatively by a computer aided photocclusal analysis system. Results: Abnormal occlusal contact force distribution was found in 29 cases, accounted for 85.3 percent of the total 34 patients. It expressed as excessive occlusal contact force in anterior teeth in 15 cases, excessive occlusal force in premolar teeth in 9 cases and significant...

Objective: To further approach the relationships between the occlusal factors and bruxism. Methods: The occlusal contact conditions of 34 patients with bruxism were studied quantitatively by a computer aided photocclusal analysis system. Results: Abnormal occlusal contact force distribution was found in 29 cases, accounted for 85.3 percent of the total 34 patients. It expressed as excessive occlusal contact force in anterior teeth in 15 cases, excessive occlusal force in premolar teeth in 9 cases and significant unbalanced contact force distribution between the two sides of the dental arc in 5 cases. Conclusion: The results indicate that there are certain relationships between the occlusal factors and bruxism. And more attentions must be paid to the excessive occlusal contact force in anterior or premolar teeth. By the computer aided photocclusal analysis system, the occlusal contact condition can be evaluated accurately, objectively and quantitatively.

目的:进一步探讨牙合因素与磨牙症的关系。方法:采用计算机光牙合图像分析系统对34例磨牙症患者的牙合接触状况进行定量研究。结果:29例患者存在牙合接触力分布的异常,占受试者的85.3%。牙合异常的主要表现为前牙区牙合接触力过大(15例)、前磨牙区牙合接触力过大(9例)及牙弓两侧牙合接触力分布明显不对称(5例)。结论:牙合因素与磨牙症之间存在一定的关系,其中前牙区或前磨牙区出现过大的牙合接触力应引起重视。

 
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