Buranade Aravind T, Algarni Youssef Abdullah, Alobaid Adel Saeed N, Kader Mohammed Abdul, Baba Suheel Manzoor, Mohamed Ali Ahamed Babiker
Department of Conservative and Endodontics, Dr. HSRSM Dental College and Hospital, Maharashtra, India.
Department of Restorative Dental Science, King Khalid University, Abha, Saudi Arabia.
J Pharm Bioallied Sci. 2022 Jul;14(Suppl 1):S507-S510. doi: 10.4103/jpbs.jpbs_74_22. Epub 2022 Jul 13.
The complete removal of residual filling materials from the root canal determines the success of root canal retreatment.
To evaluate and correlate the efficacy of ProTaper retreatment system, R-Endo retreatment system, and Hedstrom file in the removal of gutta-percha and sealer from root canal during endodontic retreatment in addition to the period desired for the elimination of gutta-percha and sealer.
Thirty extracted premolars were prepared and filled by cold lateral compaction with gutta-percha and sealer. Retreatment was finished with ProTaper retreatment files, R-Endo files, Hedstrom files with Endosolv E as the solvent for 10 specimens each. Each half of the root was imaged using the image analyzer software Chroma allied to a stereomicroscope with 10× magnification via a charge-coupled device sensor. For statistical analysis, parametric one-way ANOVA test and Scheffe post hoc multiple range test were utilized at a significance level of < 0.05.
There is no significant difference among the three groups at < 0.0001 in removing filling material. However, the rotary files needed significantly less time for removing gutta-percha along with sealer than H-file ( < 0.0001).
The gutta-percha and sealer were found in the root canal subsequent to all the retreatment techniques, especially in the apical third. Retreatment time was less only for the rotary system.
从根管中彻底清除残留充填材料决定了根管再治疗的成功与否。
评估ProTaper再治疗系统、R-Endo再治疗系统和Hedstrom锉在根管再治疗过程中从根管去除牙胶和封闭剂的效果，并将其与去除牙胶和封闭剂所需时间进行相关性分析。
选取30颗拔除的前磨牙，采用冷侧向加压法用牙胶和封闭剂进行预备和充填。分别使用ProTaper再治疗锉、R-Endo锉、Hedstrom锉配合Endosolv E作为溶剂对10个样本进行再治疗。通过电荷耦合器件传感器，使用与立体显微镜联用的Chroma图像分析软件对牙根的每一半进行10倍放大成像。进行统计分析时，采用参数单因素方差分析和Scheffe事后多重极差检验，显著性水平为<0.05。
在去除充填材料方面，三组之间在<0.0001水平上无显著差异。然而，旋转锉去除牙胶和封闭剂所需的时间明显少于H锉（<0.0001）。
在所有再治疗技术后，根管内均发现有牙胶和封闭剂，尤其是在根尖三分之一处。仅旋转系统的再治疗时间较短。
