J Dent Oral Biol | Volume 7, Issue 1 | Research Article | Open Access

Histological Assessment of Debris in Isthmuses after Using Rotary and Reciprocating Single-File Instruments

Mustafa Gündoğar1*, Taha Ozyurek2, Gianluca Plotino3, Özgecan Gündoğar4, Sibel Bektas5, Hande Ozyürek6, Gülşah Uslu7, Guzide Pelin Sezgin8 and Erhan Erkan1

1Department of Endodontics, Istanbul Medipol University, Istanbul, Turkey
2Department of Endodontics, Bahçeşehir University, Istanbul, Turkey
3Grande Plotino & Torsello - Studio di Odontoiatria, Rome, Italy
4Bahcelievler Public Hospital, Istanbul, Turkey
5Department of Pathology, Istanbul Gaziosmanpasa Training & Research Hospital, Saglık Bilimleri University,
Istanbul, Turkey
6Private practice, Kocaeli, Turkey
7Department of Endodontics, Canakkale Onsekiz Mart University, Canakkale, Turkey
8Department of Endodontics, Biruni University, Istanbul, Turkey

*Correspondance to: Mustafa Gündoğar 

Fulltext PDF


It was aimed to investigate the presence and amount of debris in isthmuses of mesial root canals of mandibular molar teeth after use of XP-endo Shaper (XPS), One Curve (OC), and Reciproc Blue (RPC Blue) single-file systems histologically. In total, 36 roots having isthmuses between mesial canals were instrumented using XPS, OC, and RPC Blue files (n=12 isthmus/group). Specimens were examined histologically, and the percentage of debris was measured in all canal thirds. Twoway analysis of variance and post-hoc Tukey test were used to analyze the data at 5% significance level. The percentage of debris was significantly lowest in the RPC Blue group at all root canal levels (P<0.05). There was no significant difference between XPS and OC groups (P>0.05). More debris was found in the apical third than other thirds in all groups (P<0.05). Debris in isthmuses after using RPC Blue files was significantly lower than XPS, and OC groups. Final debris in isthmus can negatively alter the prognosis of endodontic treatment. Hence remaining debris after using different instruments should be known.


Canal preparation; Dentine debris; Isthmus; Reciprocating motion; Rotary motion


Gündoğar M, Ozyurek T, Plotino G, Gündoğar O, Bektas S, Ozyürek H, et al. Histological Assessment of Debris in Isthmuses after Using Rotary and Reciprocating Single-File Instruments. J Dent Oral Biol. 2022; 7(1): 1189. ISSN: 2475-5680.

Subscribe to Our Newsletter