Chandar Chikine Yashas, Veeraiyan Mounika, Kumar Yata Prashanth, Reddy Nithesh Kumar, Thomas Delphia, Sreeja Dundigalla
Department of Conservative Dentistry and Endodontics, SVS institite of Dental Sciences, Hyderabad, Telangana, India.
Department of Conservative Dentistry and Endodontics, ESIC Dental College, Kalaburagi, Karnataka, India.
J Conserv Dent Endod. 2024 Jul;27(7):765-768. doi: 10.4103/JCDE.JCDE_220_24. Epub 2024 Jul 8.
Endodontic success hinges on a multifactorial interplay, with meticulous canal shaping, proper disinfection, and three-dimensional obturation being paramount. Among these factors, the amount of dentin remaining after instrumentation directly influences the biomechanical resilience and longevity of the tooth.
This study aims to evaluate the impact of various rotary instrumentation systems, including single-file, two-file, and multiple-file configurations, on the remaining dentin thickness (RDT) following canal preparation.
This was an study, original research article.
Sixty mandibular premolar human extracted teeth were decoronated at the cementoenamel junction with a diamond disc. Samples were randomly assigned to three groups using a simple random sampling technique ( = 60). Group I - Single-file system (One Curve, MicroMega) ( = 20), Group II - Two-file systems (2Shape, MicroMega) ( = 20), and Group III - Multiple-file system (Hero Gold, MicroMega) ( = 20). Preoperative cone-beam computed tomography (CBCT) scans were obtained after the sample was mounted on a modeling wax sheet. The biomechanical preparation of canals followed the manufacturer's protocols for every system. Postoperative CBCT scans were obtained. Pre- and postoperative scans were compared at standardized depths (4 mm, 7 mm, and 11 mm) within the canals (coronal, middle, and apical thirds), allowing for a comprehensive assessment of RDT throughout the canal.
According to one-way ANOVA, the highest mean was seen in Group I, followed by Group II and Group III. Hence, a statistically significant difference was found between all the groups. Tukey's test was done for intergroup comparison.
A single-file system preserved more dentin with less aggressive cutting compared to two-file and multiple-file systems.
牙髓治疗的成功取决于多因素的相互作用，其中细致的根管预备、适当的消毒以及三维充填至关重要。在这些因素中，根管预备后剩余牙本质的量直接影响牙齿的生物力学弹性和寿命。
本研究旨在评估包括单根管锉、双根管锉和多根管锉配置在内的各种旋转根管预备系统对根管预备后剩余牙本质厚度（RDT）的影响。
这是一项原创性研究文章。
60颗人下颌前磨牙在牙骨质釉质界处用金刚石盘去冠。使用简单随机抽样技术将样本随机分为三组（n = 60）。第一组 - 单根管锉系统（One Curve，MicroMega）（n = 20），第二组 - 双根管锉系统（2Shape，MicroMega）（n = 20），第三组 - 多根管锉系统（Hero Gold，MicroMega）（n = 20）。将样本安装在模型蜡片上后进行术前锥形束计算机断层扫描（CBCT）。每个系统的根管生物力学预备遵循制造商的方案。获得术后CBCT扫描。在根管内标准化深度（4mm、7mm和11mm）（冠部、中部和根尖三分之一）处比较术前和术后扫描，以便全面评估整个根管的RDT。
根据单因素方差分析，第一组的平均RDT最高，其次是第二组和第三组。因此，所有组之间存在统计学上的显著差异。进行了Tukey检验用于组间比较。
与双根管锉和多根管锉系统相比，单根管锉系统保留了更多牙本质，切割更温和。
