5种机用镍钛锉预备根管成形能力的比较研究

通过预备树脂模拟根管,比较5种不同机用镍钛器械预备重度弯曲根管的成形能力,为临床应用提供实验依据。将50个单弯模拟树脂根管随机分成5组,每组10个,分别使用ProTaper(组1),Reciproc(组2),Twisted File Adaptive(TFA,组3)、WaveOne Gold(组4)和M3(组5)进行预备,并记录预备时间。扫描透明树脂根管预备前后的墨水染色图像,并通过计算机图像分析软件重叠,测量分析根管弯曲度变化值和中心定位力值等指标,使用SPSS软件处理数据。预备时间组3最短。组1的根尖偏移明显大于其他组;根管弯曲段组3和组5显著小于其他组差异有统计学意义(P<0.05)。TFA可快速有效地预备根管;M3具有很好根管成形能力;ProTaper的偏移最大。

Comparison of Shaping Ability of Five Ni-Ti Rotary Instruments in Simulated Root Canals.

Objective: To compare the shaping ability of five Ni-Ti rotary instruments in simulated root canals. Methods: Fifty resin blocks were distributed into five groups (n=10), and prepared using ProTaper (group 1), Reciproc (group 2), TFA (group 3), WaveOne Gold (group 4), and M3 (group 5) respectively. The preparation time of each group was measured. Standardized photographs were taken before and after the instrumentation, and then they were superimposed using Adobe photoshop. The changes of the canal curvature and the centering ability were measured. Data were analyzed by SPSS 17.0. Results: The preparation time of group 3 was the shortest. Group 1 had the highest apical transportation. At the curved part, the canal transportation of group 3 and group 5 were significantly smaller than the other systems (P<0.05). Conclusion: TFA was capable of preparing the root canal quickly and efficiently. M3 showed excellent shaping ability and the ProTaper system showed the highest canal transportation.