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根管的清理和成形一直是一个难题,特别对于弯曲、狭窄的根管,不仅初学者感到困难,专家们也感到棘手。作者指出:传统的观念强调使用较锐利的根管预备器械,这恰恰加重了根管内台阶,根尖孔拉开,以及投及颈1/3区穿孔等问题的发生,即造成了根管的不良变形。人们一直在设法改进器械,但所有这些改进均是一种折衷的办法。为了更有效地克服传统根管预备的局限性,作者设计出一种新的根管扩大针,以改善根管清理和成形所存在的问题。这种新扩大针以Senia and Wildey 两作者的姓联合命名为SW,它具有三个主要特征:1.具有一个无切磨功能的引导头代替传统扩大针尖,引导扩大针到达根尖孔;2.其切磨部分(切磨头)的长度由标准
Root canal cleaning and shaping has always been a problem, especially for curved, narrow root canal, not only for beginners feel difficult, experts also feel thorny. The authors point out that the traditional notion emphasizes the use of sharper root canal preparation equipment, which aggravates the problems of root canal stepping, root apical foraging, and perforation of cast 1/3 zone, Bad deformation. People are always trying to improve the device, but all of these improvements are a compromise. In order to more effectively overcome the limitations of traditional root canal preparation, the authors designed a new root canal enlargement needle to improve the root canal cleaning and forming problems. This newly expanded needle, named after the union of the authors of Senia and Wildey's surname, SW, has three main features: 1. A cutting head with no cutting action instead of the traditional enlarged needle tip to guide the enlarged needle to the apical foramen; 2 The length of its cutting part (cutting head) by the standard