Sandhu Roohan M, Handa Aashish, Bhullar Kanwalpreet K, Dhami Tarunpreet K, Oberoi Gurleen K, Sran Sukhman S
Department of Conservative Dentistry and Endodontics, Sri Guru Ram Das Institute of Dental Sciences and Research, Amritsar, Punjab, India.
Dental Surgeon, Amritsar, Punjab, India.
Int J Clin Pediatr Dent. 2025 Apr;18(4):394-398. doi: 10.5005/jp-journals-10005-3080. Epub 2025 May 19.
The aim of root canal therapy is to shape and disinfect the root canal space to eradicate microbial pathogens using various endodontic files. However, instrument separation is an unfortunate sequela of endodontic instrumentation that can affect the outcome of endodontic therapy.
The current study aims to assess the incidence of instrument separation of three different file systems used in different operating motions (hand files, continuous rotary, and reciprocating files).
In this study, three different file systems ( = 10 each)-Reciprocation File Neoendo (Orikam Healthcare India Private Limited, Haryana), Hand K-files (Dentsply Maillefer, USA), and HyFlex CM File (Coltene Whaledent, Altstetten, Switzerland)-were first used for biomechanical preparation of only mesiobuccal (MB) canals in molars. The same instruments were then transferred and used for root canal preparation of MB canals in extracted molar teeth. The number of canals shaped prior to instrument fracture was documented to calculate the incidence of instrument separation. The data was analyzed using one-way analysis of variance and Bonferroni analysis of variance.
The results displayed that the Reciprocation File Neoendo had the lowest incidence of file separation at 10.5%, followed by Hand K-files at 18% and HyFlex CM files at 25%.
Reciprocation File Neoendo showed the lowest cyclic fatigue among all the tested groups, thus proving its superiority over the other file systems in terms of cyclic fatigue resistance. The current study also included the influence of intraoral conditions and root canal curvatures, as it was first used in patients after obtaining necessary informed consent.
Sandhu RM, Handa A, Bhullar KK, . Comparison of Incidence of Instruments Separation among Endodontic Files Used in Reciprocation and Continuous Rotary Motion. Int J Clin Pediatr Dent 2025;18(4):394-398.
根管治疗的目的是使用各种根管锉对根管空间进行塑形和消毒，以根除微生物病原体。然而，器械分离是根管治疗器械操作中一个不幸的后遗症，它会影响根管治疗的结果。
本研究旨在评估三种不同锉系统在不同操作方式（手动锉、连续旋转锉和往复锉）下器械分离的发生率。
在本研究中，三种不同的锉系统（各10个）——往复锉Neoendo（印度哈里亚纳邦奥里卡姆医疗保健私人有限公司）、手动K锉（美国登士柏迈丽费）和HyFlex CM锉（瑞士阿尔特施泰滕科尔tene惠尔登特）——首先用于仅对磨牙的近中颊根管进行生物力学预备。然后将相同的器械转移并用于拔除磨牙的近中颊根管的根管预备。记录器械折断前预备的根管数量，以计算器械分离的发生率。使用单因素方差分析和Bonferroni方差分析对数据进行分析。
结果显示，往复锉Neoendo器械分离的发生率最低，为10.5%，其次是手动K锉，为18%，HyFlex CM锉为25%。
往复锉Neoendo在所有测试组中显示出最低的循环疲劳，从而证明其在抗循环疲劳方面优于其他锉系统。本研究还纳入了口腔内条件和根管弯曲度的影响，因为它首先在获得必要的知情同意后用于患者。
Sandhu RM, Handa A, Bhullar KK, 等。往复和连续旋转运动中使用的根管锉器械分离发生率的比较。《国际临床儿科牙科学杂志》2025；18(4):394 - 398。
