Badar Sheikh Bilal, Zafar Kamil, Ghafoor Robia, Khan Farhan Raza
Aga Khan University Hospital, Karachi, Pakistan.
Department of Surgery, Aga Khan University Hospital, Karachi, Pakistan.
J Pak Med Assoc. 2020 Dec;70(12(B)):2371-2375. doi: 10.47391/JPMA.335.
To compare the effect of OneShape and ProTaper Next file on the change in canal width and angle of curvature in simulated curved canal in resin blocks.
The quasi-experimental study was conducted at the Aga Khan University, Karachi, from January to March 2018, and comprised endodontic resin blocks that had inbuilt curved canals. These were randomly divided into 2 equal groups and were subsequently prepared using OneShape in group A, and ProTaper Next rotary instrument in group B followed by staining with red and blue ink for comparison of pre- and post operative images of canals. Standardised photographs were taken along with reference measuring scale. Independent sample t-test and Paired sample t-test were used to compare the angle of curvature and canal width changes and pre and post instrumentation changes in resin block after using both the instruments, respectively. Intra class correlation was used to determine inter-examiner reliability. The level of significance was kept at p value < 0.01. SPSS 22 was used for data analysis.
Of the 60 blocks, 30(50%) were in each of the two groups. The mean pre-instrumentation angle of curvature was 32.3±2.13 and 31.0±3.28 degrees for groups A and B. The mean degree of canal straightening post-intervention was 1.5±0.5 and 3.6±1.38 degrees in groups A and B (p<0.001). In terms of canal width changes, OneShape file removed more resin material from the canal walls compared to the ProTaper Next system (p<0.001).
ProTaper Next file significantly altered the angle of curvature in the resin block compared to OneShape file, but the amount of material removed from the canal space was significantly higher with the OneShape file compared to ProTaper Next.
比较OneShape锉和ProTaper Next锉对树脂块中模拟弯曲根管的根管宽度变化和弯曲角度的影响。
2018年1月至3月在卡拉奇的阿迦汗大学进行了这项准实验研究，研究对象为内置弯曲根管的牙髓树脂块。将这些树脂块随机分为两组，每组30个。A组使用OneShape锉进行预备，B组使用ProTaper Next旋转器械进行预备，随后用红色和蓝色墨水染色，以便比较根管术前和术后的图像。拍摄标准化照片并附带参考测量尺。分别使用独立样本t检验和配对样本t检验比较使用两种器械后树脂块中的弯曲角度和根管宽度变化以及预备前后的变化。使用组内相关系数来确定检查者间的可靠性。显著性水平设定为p值<0.01。使用SPSS 22进行数据分析。
60个树脂块中，两组各有30个（50%）。A组和B组术前平均弯曲角度分别为32.3±2.13度和31.0±3.28度。干预后A组和B组根管变直的平均度数分别为1.5±0.5度和3.6±1.38度（p<0.001）。在根管宽度变化方面，与ProTaper Next系统相比，OneShape锉从根管壁去除的树脂材料更多（p<0.001）。
与OneShape锉相比，ProTaper Next锉能显著改变树脂块中的弯曲角度，但与ProTaper Next相比，OneShape锉从根管空间去除的材料量显著更高。
