Li Siyu, Tang Mengzhen, Wang Xi, Yang Jian
Department of Cariology and Endodontics, The Affiliated Stomatological Hospital, Jiangxi Medical College, Nanchang University, Nanchang 330006, China.
Jiangxi Provincial Key Laboratory of Oral Diseases, Nanchang 330006, China.
Int J Biomater. 2025 Jul 4;2025:2161833. doi: 10.1155/ijbm/2161833. eCollection 2025.
This study compared the shaping ability and apical debris extrusion of four nickel-titanium (Ni-Ti) single-file systems in simulated curved root canals. Forty simulated curved root canals in resin blocks were randomly assigned to four groups ( = 10): Reciproc Blue (RCB), V-Blue, One Plex, and S-ONE. Images of the simulated root canals were captured before and after instrumentation. The two layers were processed and superimposed using specialized software. Eleven points (Levels 0-10) were selected at 1-mm intervals starting from the apex for evaluation. The amount of resin removed from both the inner (X1) and outer sides (X2) of the root canal, as well as the final canal width (Y), were measured. The centering ratio was calculated using the formula (X1 - X2)/Y to assess the centering ability of the instruments. Apically extruded debris was collected during the root preparation. The preparation times for the root canal were as follows: One Plex > RCB > V-Blue > S-ONE ( < 0.001). All four Ni-Ti files were effective in straightening the root canal, with no significant difference in curvature change ( > 0.05). At the apex, One Plex exhibited significantly greater deviation compared with the other three groups ( < 0.05). At Levels 7-8, the deviation with RCB was significantly greater than with One Plex and S-ONE ( < 0.01). The amount of apical debris extrusion in the One Plex group was significantly higher than that in the others ( < 0.01). S-ONE demonstrated the best centering ability compared with other groups. In contrast, One Plex produced the highest amount of apical debris extrusion and exhibited transportation at the apical foramen. At Levels 6-8, RCB exhibited excessive removal of the inner canal wall relative to S-ONE and One Plex.
本研究比较了四种镍钛（Ni-Ti）单根锉系统在模拟弯曲根管中的塑形能力和根尖碎屑挤出情况。将树脂块中的40个模拟弯曲根管随机分为四组（每组 = 10）：Reciproc Blue（RCB）、V-Blue、One Plex和S-ONE。在根管预备前后拍摄模拟根管的图像。使用专门软件对两层图像进行处理和叠加。从根尖开始，每隔1毫米选择11个点（0-10级）进行评估。测量根管内侧（X1）和外侧（X2）去除的树脂量以及最终根管宽度（Y）。使用公式（X1 - X2）/Y计算定心率，以评估器械的定心能力。在根管预备过程中收集根尖挤出的碎屑。根管预备时间如下：One Plex > RCB > V-Blue > S-ONE（P < 0.001）。所有四种镍钛锉在使根管变直方面均有效，曲率变化无显著差异（P > 0.05）。在根尖处，One Plex与其他三组相比偏差显著更大（P < 0.05）。在7-8级，RCB的偏差显著大于One Plex和S-ONE（P < 0.01）。One Plex组的根尖碎屑挤出量显著高于其他组（P < 0.01）。与其他组相比，S-ONE表现出最佳的定心能力。相比之下，One Plex产生的根尖碎屑挤出量最高，且在根尖孔处出现了根管偏移。在6-8级，RCB相对于S-ONE和One Plex对根管内壁的去除过多。
