Objective: To introduce a new prefabricated post-and-core system, a helical drilling bit and a prefabricated post-and-core consisting of a root canal orifice bur which was designed by the author. 目的:介绍一种由螺旋型根管钻、行设计的根管口台阶状车针、成桩核组成的预成桩核系统。
An experimental study on repairing horn-shaped root canal orifice by different materials 不同材料修复喇叭型根管口的实验观察
OBJECTIVE: The aim of root canal shaping is to form a continuously tapered shape with the smallest diameter at the apical foramen and the largest at the orifice avoiding canal transportation. 目的:理想的根管成形要求预备后的根管系统成为冠方最大、根尖处最小的连续锥状形态,同时还要防止根管偏移。
Objective To study the shape and location of root canal orifice in maxillary first permanent molar and provide a morphological basis for locating canal orifice in endodontic therapy. 目的研究上颌第一磨牙根管口形态和位置关系,为根管治疗时寻找根管口提供解剖学依据。
Methods: The root canal with root canal orifice burs and helical drilling bits were prepared in advance. 方法:采用根管口台阶状车针与螺旋型根管钻组合起来扩大根管。
Applied anatomy on shape and location of root canal orifice in maxillary first permanent molar 上颌第一磨牙根管口形态、位置的应用解剖
Methods The shape of root canal orifice and its relation to pulp chamber walls and the groove on pulpal floor in 42 maxillary first permanent molor were observed and measured under the XTL 2 photostereograph microscope. 方法采用目镜配置测微尺的XTL2型体视摄影显微镜,观测42个上颌第一磨牙的根管口形态及其与髓室底截面形态和髓室底沟的位置关系。
Applied anatomy of mb-2 root canal orifice of maxillary first permanent molar with operating microscope 使用手术显微镜对上颌第一磨牙近中颊侧第二根管应用解剖的研究
Which root canal taper of the teeth models are 0.1 in this research suffered the greatest stress. In three different forms of dental anatomy models, the biggest stress of root canal orifice occurred in the tooth with double-root and three-root canal, to 14.93 Mpa. 其中根管锥度为0.1这一组模型根管口应力最大,三种不同解剖形态的牙齿模型中最大为双根管三根牙齿模型,达到14.93Mpa。
Although the anatomic form of C-shaped root system is complicated, and the diagnoses and the treatment are more difficult than the common ones, we can diagnose the C-shaped root canal system exactly by checking root canal orifice, taking preoperative radiographs and using initial apical file. C形根管系统的解剖形态复杂,诊断和治疗都较常规病例难度大。通过术前X线片、根管口探查和初尖锉,可以较准确地诊断C形根管系统。
Analyze the types of root canal orifices, according to the root canal orifice separate criteria which was proposed by Melton. 术中探查根管,参照Melton等提出的根管口分类标准,分析根管口的分型。