Abstract：
The aim of the present study was to analyze the incidence of fracture of ProDesign Logic system instruments in endodontic treatments performed by a specialist, in addition to identifying the dental group, arch, and the root canal thirds in which the fractures occurred more frequently. Digital radiographs and medical records were initially analyzed and resulted in the selection of 561 teeth (1302 canals) treated between 2018 and 2020, using the ProDesign Logic system instruments. These data were reassessed to determine the occurrence of fractures and identify the dental group and root canal thirds in which they occurred. Then, the data were statistically analyzed using the Fisher\'s Exact Test (p < 0.05). The general fracture rates were 8.5 and 3.69%, considering the number of teeth and canals treated, respectively. Mandibular first molars were the teeth most associated with the occurrence of fractures (19.1%). When the arches were compared, there was no statistical difference regarding the number of fractures in the different root canal thirds (p = 0.307). However, they were more frequent in the apical third in both arches (p = 0.000). The incidence of fracture of ProDesign Logic system instruments was relatively high and occurred more frequently in the apical third of molars.
摘要：
本研究的目的是分析专家进行的牙髓治疗中ProDesignLogic系统仪器骨折的发生率，除了确定牙科组，拱门,和根管三分之一，其中骨折发生更频繁。最初分析了数字X射线照片和病历，并使用ProDesignLogic系统仪器选择了2018年至2020年之间治疗的561颗牙齿（1302根管）。对这些数据进行了重新评估，以确定骨折的发生，并确定发生骨折的牙齿组和根管的三分之一。然后，数据采用Fisher精确检验进行统计学分析(p<0.05)。一般骨折率为8.5％和3.69％，考虑到治疗的牙齿和运河的数量，分别。下颌第一磨牙是与骨折发生最相关的牙齿（19.1％）。当比较拱门时，关于不同根管三分之一的骨折数量没有统计学差异（p=0.307）。然而,在两个拱门的根尖三分之一中，它们的频率更高（p=0.000）。ProDesignLogic系统仪器的骨折发生率相对较高，并且在磨牙的顶端三分之一中发生的频率更高。
