1)C-shaped canal systemC形根管系统
1.Objective: The purpose of this study was to evaluate the efficacy of preoperative and the operating microscope to recognize C-shaped mandibular second molars and to investigate the anatomical features of C-shaped canal system through the initial apical file(IAF) radiographs.研究目的：研究术前X线片和手术显微镜对下颌第二磨牙C形根管系统的诊断并分析初尖锉片对于C形根管系统解剖形态诊断的意义。
2.Objectives: The purpose of this study was to evaluate the efficacy ofpreoperative and the operating microscope to recognize C-shaped canal system in mandibular second molars and to find out the best methods of the root canal obturation.目的:比较不同方法诊断下颌第二磨牙C形根管系统的发生率以及探索C形根管系统的最佳充填方法。
英文短句/例句
1.Study on Preparation of C-shaped Root Canal System and Clinical Treatment;C形根管系统的预备及临床治疗研究
2.Evaluation on the accuracy of ProPex electronic apex locator in measuring c-shaped root canal working lengthProPex根尖定位仪在C形根管系统准确性的研究
3.The Study of Diagnosis and Obturation about the C-Shaped Canal System in Mandibular Second Molars;C形根管系统的诊断及充填方法的研究
4.Clinical Study of C-shaped Root Canal System of Mandibular Second Molars下颌第二磨牙C形根管系统的临床探讨
5.Clinical Study of the Symmetry of C-shaped Root Canal System in Mandibular Second Molars.下颌第二磨牙C形根管系统对称性的临床研究
6.Construction of the Three-dimensional Finite Element Model of the Mandibular Second Molar C-shaped Canal Root System显微CT技术建立下颌第二磨牙C形根管系统的有限元模型
7.Shaping Ability of Nickel-titanium Instruments in Curved Root Canals Preparation;镍钛根管预备系统预备弯曲根管的成形效果
8.Comparative study of cutting efficiency of three instrumentation techniques in C-shaped canals三种方法预备C形根管对根管壁切削的比较
9.Clinical Researches of C-shaped Root Canals in Second Mandibular Molars;下颌第二恒磨牙C形根管的临床探讨
10.An in Vitro Study of Fracture of Flared Canal Teeth Restored with Three Post-and-Core Systems;三种桩核系统修复喇叭形根管的比较性研究
11.Clinical diagnosis and treatment of C-shaped canals in mandibular molars using a dental operating microscope根管显微镜下下颌磨牙C形根管的临床分型与治疗
12.An in Vitro Study of Root Canal Obturation of C-Shaped Canals in Mandibular Second Molars by Three Techniques;下颌第二磨牙C形根管充填效果的实验研究
13.An in Vitro Study on the Incidence of C-shaped Root Canal of Mandibular Second Molars离体下颌第二磨牙C形根管发生率观测
14.The Design of Distribution Management System Based on the C/S Structure;基于C/S结构的分销管理系统设计
15.Research on Shop Floor Management System Based on C/S Pattern;C/S模式车间级生产管理系统的研究
16.Books Management System Development Based on C/S Structure;基于C/S结构的图书管理系统的开发
17.Sports Management system that B/S is Combined with C/S;B/S与C/S相结合的运动会管理系统
18.Data Management System (C/S Mode) for Environmental Monitoring;环境监测C／S模式数据库管理系统
相关短句/例句
C-shaped root canalC形根管
1.Clinical diagnosis and treatment of C-shaped root canals in mandibular second molars;下颌第二磨牙C形根管的特点和临床治疗
2.The parallel radiographic characteristics of the C-shaped root canals in mandibular second molars;下颌第二磨牙C形根管水平投照X线影像特点
3.Clinical diagnosis and treatment of C-shaped root canals in mandibular second molars;下颌第二磨牙C形根管诊断与治疗探讨
3)C-shaped canalC形根管
1.Clinical diagnosis and treatment of C-shaped canals in mandibular molars using a dental operating microscope根管显微镜下下颌磨牙C形根管的临床分型与治疗
2.Comparative study of cutting efficiency of three instrumentation techniques in C-shaped canals三种方法预备C形根管对根管壁切削的比较
3.Methods:Twenty-one extracted mandibular second molars with C-shaped canals were randomly divided into three groups.结论:在3种充填方法中,Thermafil组C形根管根尖充填效果好,ObturaⅡ组在根中充填效果好。
4)C-shaped canalsC形根管
1.Research progress in the C-shaped canals system and the root canal preparation;C形根管系统及其根管预备的研究进展
2.Methods The C-shaped canals of mandibular second molars were treated with the so-called drawing-fish-net root canal preparation technique.目的探索预备下颌第二磨牙C形根管的有效方法。
3.OBJECTIVE:To evaluate the difference in the cleaning of root canal walls of C-shaped canals by three methods.目的:通过离体牙研究,比较3种方法预备C形根管的清洁效果。
5)root canal system根管系统
1.Clinical diagnosis and treatment of root canal system of mandibular second molars;下颌第二磨牙根管系统的临床诊断和治疗
2.Morphological study on the root canal system of the third molar s fused root in Jiangxi province s population;江西地区人群第3磨牙融合根根管系统形态学研究
3.Objective:To study the morphyology of assessory canals in root canal systems of permanent teeth in a Chinese population ,provide anatomical reference to endodontic treatment.目的 :研究中国人恒牙根管系统中侧副管的解剖形态 ,为牙髓治疗提供依据。
6)CDMA Network Management SystemC网网管系统
1.In this paper, combined with the CDMA Network Management System,it illustrated in detail about CDMA20001X and 1X EVDO technologies, analysis and design on the object-oriented systems, model-based design of database and the WEB applications with ASP.本文结合C网网管系统详细阐述了CDMA20001X及1X EVDO的相关技术、面向对象的系统分析与设计、数据库模型的设计以及基于ASP。
延伸阅读
燃料混合管压形缩管模陕西科技大学(陕西咸阳 712081) 刘俊生 周明贵 张喜涛[摘要] 介绍了一种在机械压力机上实现较长尺寸缩管工件的成形模结构。关键词 闭合高度 缩管 脱模1 引言 管材的缩管是常见的成形工艺，常用3种方法：1在缩管旋转机上进行；2在车床上旋压缩口，滚压加工；3用模具在压力机上进行。具体使用哪种方法，视工件要求而定。针对图1所示零件，采用压力机成形工艺比较合适。 根据零件尺寸，材料及计算结果，若在螺旋压力机或液压机上成形，由于工件成形所需压力很小，不能充分利用设备功率，且生产效率较低。故而选用机械压力机成形，模具设计中应重点解决由于工件缩管长度较长而引起的脱模困难，同时又要兼顾模具的闭合高度(在成形很小的情况下，模具闭合高度成为选用机床的主要因素)。2 模具结构 模具结构如图2所示。上内凹模2直接装在模柄上，夹持于滑块中，利用滑块中的打杆槽，装有上拉料黠构，上拉料结构由打料杆14，拉杆13，拉板12，螺栓8，顶杆10组成。下模板固定于工作台面，顶板9位于台面漏料孔中。其特点是：(1)利用冲床，滑块在缩门成形工序完成后拉动打料杆14，使与之连成一体顶杆10向上抬起，解决了由于工件缩口长度较长而引起的脱模困难。(2)顶板9置于工作台漏料孔中，即有效利用机床闭合高度，又减少于模具体积。3 工作过程 冲床滑块上升至上死点时，穿在滑块上的打料杆14带动上拉料组件以至最高点。放管材于定位板4的定位孔中。滑块下行，定位销3导正管材上端进入上凹模2定位孔中后，滑块施轴向力于管材端面．通过模芯11进行缩口，最后通过定位板4与上内凹模进行凸台压形，模芯11和上凹模2材料选用W18Cr4v，热处理硬度61—63HRC。同时，上拉料组件也随滑块一起下降之下死点，压形，缩口完成后，随着滑块一起上升的上拉料组件中的顶杆10抬起工件，取出工件。4 效果 该模具装于400kN偏心冲床（闭合高度300mm，工作台孔直径∮200mm）上，经过近十万件产品的生产，模具基本完好，满足了生产的要求。
