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Comparing the Effectiveness of Two Methods for Removing Residual Root Filling Materials in Retreatment
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N Naghavi    , M Gharechahi , M Baniasadi * |
| 1.Department of Endodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, I.R.Iran. , M.Baniasadi@bums.ac.ir |
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Abstract: (652 Views) |
Background and Objective: Non-surgical retreatment is the first choice for the treatment of persistent periapical diseases and failure of conventional treatments. Given the necessity of proper removal of gutta-percha and bioceramic root canal sealer for the success of retreatment, the aim of this study was to compare Ultrasonic (Ultra X) and M3 Max file techniques.
Methods: This laboratory study was conducted on 36 extracted human premolars that met the inclusion criteria (single-rooted, single-canal premolars, similar in root diameter, oval canal, with no branching and anatomical complexity). Two-dimensional radiographs were obtained to examine the root canals and standardize their diameters, and then, in order to standardize the samples, the crowns of the teeth were cut with a double-sided diamond disc at low speed. The canals were prepared with M3 rotary files and obturated with gutta-percha and bioceramic root canal sealer using the single cone technique. The teeth were placed in an incubator for one week, and root retreatment was performed using M3 files. The samples were randomly divided into three groups of 12 based on activation of irrigation solution, including the control group (side-vented needle as a comparison), the ultrasonic irrigation group, and the M3 Max activation group. The teeth were then divided into two halves, mesial and distal, and the area of residual filling material to total root area was examined in apical, middle, and coronal sections using a stereomicroscope and Image J software.
Findings: The results showed that in all three sections examined, the percentage of residual material in the control group (29.83±10.73% in the apical section, 19.19±11.13% in the middle section, and 6.94±3.51% in the coronal section) was significantly higher than Ultra X and M3 Max groups (p<0.001).
Conclusion: Based on the results of this study, the use of ultrasonic and M3 Max techniques can significantly remove residual root canal filling material and lead to successful root canal retreatment. |
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| Keywords: Root Canal Filling Materials, Ultrasonic, Retreatment, Gutta-Percha, Bioceramic Sealer. |
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Full-Text [PDF 264 kb]
(150 Downloads)
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Type of Study: Research |
Subject:
Dentistry (Endo)
Received: 2023/09/2 | Accepted: 2023/12/30 | Published: 2024/11/24
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