Jaiswal Neelam U, Mantri Shivkumar P, Paul Bonny, Dube Kavita, Singh Vaishnavi, Bhatnagar Nupur
Department of Conservative Dentistry and Endodontics, Hitkarini Dental College, Jabalpur, Madhya Pradesh, India.
J Conserv Dent. 2019 May-Jun;22(3):260-265. doi: 10.4103/JCD.JCD_487_18.
To evaluate the scouting ability of three pathfinding nickel-titanium rotary instruments in moderately curved molar canals.
Ninety maxillary and mandibular molars were collected and were divided randomly into three groups each having 15 maxillary and 15 mandibular molars. The teeth were mounted on a specific apparatus for simulation of dento-alveolar socket. After access cavity preparation, the canals were negotiated with 08 K-file. Glide path preparation was performed using Mtwo or ProGlider or OneG instruments. The number of teeth in which the file reached the full working length (RFWL), number of passes required, and number of fractured instruments were recorded and subjected to statistical analysis using Chi-square, Kruskal-Wallis, and Mann-Whitney tests.
There was a significant difference between the groups ( < 0.05). The RFWL of ProGlider was significantly higher than that of Mtwo ( = 0.005) and OneG ( = 0.037). The percentage of fracture with ProGlider was 6.67% and both Mtwo and OneG had 26.67% frequency. The difference was not statistically significant ( > 0.05). There was significant difference in the number of insertion passes in maxillary distobuccal ( < 0.05), mandibular mesiobuccal ( < 0.01), and distal ( < 0.01) canals. ProGlider was the most effective pathfinding instrument due to its file's design and a progressive taper of 2%-8%. This achieves a greater preflaring of the coronal and middle portions of the root canal, rendering the advance of the instrument toward the apex easier.
ProGlider performed more efficiently and with less instrument breakage in scouting moderately curved canals of molar teeth.
评估三种镍钛旋转根管探查器械在中度弯曲磨牙根管中的探查能力。
收集90颗上颌和下颌磨牙，随机分为三组，每组含15颗上颌磨牙和15颗下颌磨牙。将牙齿安装在特定装置上模拟牙槽窝。开髓后，用08 K锉疏通根管。使用Mtwo或ProGlider或OneG器械进行根管通路预备。记录锉达到工作长度的牙齿数量、所需通过次数及器械折断数量，并采用卡方检验、Kruskal-Wallis检验和Mann-Whitney检验进行统计学分析。
各组间存在显著差异（P<0.05）。ProGlider的工作长度达到率显著高于Mtwo（P = 0.005）和OneG（P = 0.037）。ProGlider的折断率为6.67%，Mtwo和OneG的折断频率均为26.67%。差异无统计学意义（P>0.05）。上颌远中颊根（P<0.05）、下颌近中颊根（P<0.01）和远中根（P<0.01）的插入通过次数存在显著差异。由于ProGlider锉的设计及其2%-8%的渐进锥度，它是最有效的根管探查器械。这使得根管冠部和中部能得到更大程度的预扩，使器械向根尖推进更容易。
在探查磨牙中度弯曲根管时，ProGlider的效率更高，器械折断更少。
