Evaluation of gutta-percha removal from the dentinal tubules using different instrumentation techniques with or without solvent: An In vitro study

Journal of the International Clinical Dental Research Organization

article

Mukesh Kumar Hasija¹  Babita Meena¹  Deepti Wadhwa²  Kulvinder Kaur Wadhwani³  Virender Yadav⁴ 

[1] Department of Conservative Dentistry and Endodontics, Faculty of Dentistry;Department of Periodontics, Postgraduate Institute of Dental Sciences;Department of Conservative Dentistry and Endodontics, Faculty of Dental Sciences, King George Medical University;Dental Department, SN Medical College

关键词: Dentinal tubules;    gutta-percha solvent;    retreatment;    scanning electron microscope;   

DOI  :  10.4103/jicdro.jicdro_46_19

来源: Panstwowy Zaklad Wydawnictw Lakarskich

【 摘 要 】

Aim: The cleanliness of dentinal tubules was compared after using different techniques for the removal of root filling material during root canal retreatment with and without solvent. Materials and Methods: Root canals of 90 extracted teeth were prepared and filled in vitro using lateral compaction with gutta-percha and sealer. In the control group ( n = 10), the canals were left unfilled. In four experimental groups ( n = 20 each), the root fillings were removed after 2 weeks using Hedstrom file, one of two rotary nickel–titanium instruments (ProTaper and Mtwo retreatment files), or a neodymium-doped yttrium aluminum garnet laser with H-file. Each experimental group was further subdivided into two subgroups ( n = 10) according to whether the solvent N,N-dimethylformamide was used or not. After final irrigation, the samples were split longitudinally and photographed. The dentinal tubules' cleanliness was evaluated at the microscopic level by a scanning electron microscope in the coronal, middle, and apical thirds of each root half. Results: The number of open tubules was more prevalent in the control group, followed by the nonsolvent subgroups, than in the solvent subgroup ( P < 0.05). Conclusions: All of the instruments left some filling materials inside the root canal both with and without solvent, but using solvent led to more remnants inside the dentinal tubules.

【 授权许可】

Unknown