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Year : 2017  |  Volume : 9  |  Issue : 3  |  Page : 122-125

Deformed and fractured instruments in the removal of root canal filling material using different techniques, in vitro

1 Endodontic Lecturer, Riyadh Colleges of Dentistry and Pharmacy, Riyadh, Saudi Arabia
2 Professor, Chairman of Restorative Department, Riyadh Colleges of Dentistry and Pharmacy, Riyadh, Saudi Arabia
3 Endodontic Consultant, General Director of Dental Services, Ministry of Health, Dental Department, Riyadh, Saudi Arabia

Correspondence Address:
Bushra Faiz Alhawsawi
Endodontic Lecturer, Riyadh Colleges of Dentistry and Pharmacy, Riyadh
Saudi Arabia
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jioh.jioh_114_17

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Aims and Objectives: The aims and objectives of the study were to evaluate deformed and fractured instruments in removing gutta-percha (GP) from the root canal using various techniques. Materials and Methods: Root canals of sixty extracted human permanent premolar teeth were prepared and filled with laterally condensed GP and AH26 sealer, and the specimens were incubated for 2 weeks. Then, roots were divided randomly into five groups (12 roots of each group). The root fillings were removed with Gates-Glidden, D-Race instruments, ProTaper Universal Retreatment instruments (alone or with Hedstrom files). Fractured or deformed instruments were noted. The data were analyzed with one-way analysis of variance and Tukey's post hoc test to demonstrate difference between groups. Results: Overall, 35 instruments were fractured or deformed in the study, of them 29 Hedstrom files were deformed. Conclusion: Within the limitations of this study, it can be concluded that all GP removal techniques did not clean the canals completely, but deformity and fracture instruments were more. Maximum Hedstrom files were deformed.

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