查询词典 teeth root

The immunohistochemical location of noncollagenous protein, bone sialoprotein , osteopontin and osteocalcin at different stages following periradicular surgery was undertaken. The crystals formation on surfaces of MTA was evaluated when treated in different conditions without cells in vitro and in vivo. MTA was used to manage clinical problems, including perforations in roots or furcations, and pulpless permanent teeth with incomplete root formation. The study included the following three parts

本研究试图通过体内外研究探讨MTA表面牙骨质形成的机理，动物体内动态观察根尖周组织在用MTA倒充填后的组织反应和细胞外基质非胶原蛋白的表达，体外观察MTA在不同的环境下表面的形态及成分变化，和在体内环境下材料表面磷灰石层的形成，同时结合临床病例观察其临床治疗效果。

According to the known position of each tooth, the root concavities of 1026 teeth were recorded and analyzed in this study.

本研究乃选取有明确位置记录之牙齿，对其牙根面凹陷出现之情形，加以统计与分析。

The stellate reticu-lum and the dental follicle of the underlying permanent tooth seems to be important for the deciduous root re-sorption. However, primary teeth without a permanent successor eventually exfoliates as well. Our current understanding on the underlying mechanisms is slim.

继承恒牙的牙囊和星网状层似乎在乳牙根的吸收中起着重要作用，而继承恒牙先天性缺失的乳牙根吸收最终仍会发生，其机制目前尚不明了。

Methods: The teeth of 4 cases were treated by filling the perforations with the 3M ESPE Single Bond Adhesive and the 3M ESPE F200 Compomer through the pulp cavities,the root canals were obturated well and follow-up surveys were conducted for 3 months.

对4例医源性髓腔穿孔的患牙用3M SingleBond粘接剂和3M F200光固化复合体经髓腔充填修复穿孔，进行完善的根管充填后3个月随访观察。

The tissue responses to MTA were compared with that to amalgam. In 16 premolar teeth of dogs (32 roots), the root canals were cleaned, shaped and obturated under ideal condition.

第一部分：MTA倒充填后根尖周组织的愈合反应和非胶原蛋白的表达4只健康杂种犬，双侧下颌第三、第四双尖牙作为实验牙。

2The density of human teeth is approximately among 1.20-1.40+103kg/m3. The density of crown is higher than that of root with significant difference.

人类牙的密度值恒定在一定范围之内，约在1.20～1.40×10~3kg／m~3之间，且牙冠密度值明显大于牙根密度值。

Teeth have two basic parts, a root to anchor the tooth to the jaw and a crown above the gum line.

牙齿有两个基本部份，牙根把牙齿锚定在下颌上，牙冠位于齿龈线以上。

When selecting the abutments, the teeth with above twenty percent of root bone reduction must be considered cautiously.

在固定桥基牙的选择时，对于牙槽骨吸收超过根长20％的牙齿要慎重考虑。

Pre-grinding gear hobs are widely used as the rough machining cutters for hardened gears with high precision, for they can leave undercut at the root of the gears'teeth.

由于磨前齿轮滚刀能够使得被加工齿轮轮齿根部产生一定量根切，所以被广泛用作高精度硬齿面齿轮的粗加工刀具。

Methods:Twenty-three tooth of 19 patients were examined by using ProMax lateralal sagittal axial panoramic tomographs before the teeth were extracted or orthodonted to assessment location and shape of dental root.

随着影像学检查技术的发展，全景机的操作性能及程序化控制水平明显提高，可进行多种部位投照[1]。ProMax数字化X光机可以投照颌骨牙列断层片。

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。