Basic ResearchMicrocomputed Assessment of Transportation, Centering Ratio, Canal Area, and Volume Increase after Single-file Rotary and Reciprocating Glide Path Instrumentation in Curved Root Canals: A Laboratory Study
Section snippets
Sample Size Calculation
Based on a previous study (9), a power calculation was performed using the chi-square test and the statistical variance test (G*Power 3.1 software; Heinrich Heine University, Dusseldorf, Germany) with α = 0.05 and β = 0.95. After calculations, it was determined that the sample size for each group had to include a minimum of 10 teeth.
Sample Selection
After approval of the ethics committee (no. 2017/168), 30 mandibular molar mesial roots, extracted for periodontal and orthodontic reasons, were included in the
Results
The differences in transportation and centralization of the mesiobuccal and mesiolingual canals after the root canal preparation using PG, WOGG, and RP are presented in Table 1. The means and standard deviations of absolute and relative (%) increase in the canal surface area (mm2), volume (mm3), and SMI after root canal preparation using the PG, WOGG, and RP are presented in Table 2. Representative images are presented in Figure 1.
When comparing the PG file system with the WOGG and RP file
Discussion
The changes that occur in root canals after root canal preparation are affected by various factors, such as the root canal anatomy, file design, alloys used in instrument manufacturing, and the instrumentation method 6, 15. The transportation after the root canal shaping procedures, the noncentral root canal preparation, and the insufficient or excessive instrumentation of the tooth structure may have negative effects on the prognosis (16). For this reason, assessing the quality of root canal
Conclusion
Within the limitations of the present study, there was no significant difference between the groups regarding SMI changes. However, the changes in the volume and surface area in the PG group were found to be significantly higher than in the WOGG and RP groups. Furthermore, the WOGG and RP groups also showed better centering ability than the PG group. From the perspective of transportation, there was no significant difference at the apical third between all groups, but less transportation was
Acknowledgments
This work was funded by the Scientific Research Projects Coordination Unit of Abant Izzet Baysal University (project no.: 2017.06.02.1224).
The authors deny any conflicts of interest related to this study.
References (24)
- et al.
Shaping ability of reciprocating motion in curved root canals: a comparative study with micro–computed tomography
J Endod
(2011) - et al.
Comparison of canal transportation and centering ability of K-files, ProGlider file, and G-files: a micro-computed tomography study of curved root canals
J Endod
(2016) - et al.
Shaping ability of different nickel-titanium systems in simulated S-shaped canals with and without glide path
J Endod
(2014) - et al.
Glide path management with single- and multiple-instrument rotary systems in curved canals: a micro-computed tomographic study
J Endod
(2015) - et al.
Micro–computed tomographic assessment on the effect of ProTaper Next and Twisted File Adaptive systems on dentinal cracks
J Endod
(2015) A comparison of canal preparations in straight and curved root canals
Oral Surg Oral Med Oral Pathol
(1971)- et al.
Apically extruded debris after retreatment procedure with Reciproc, ProTaper Next, and Twisted File Adaptive instruments
J Endod
(2017) - et al.
Comparison of nickel-titanium and stainless steel hand-file instrumentation using computed tomography
J Endod
(1996) - et al.
Computed micro-tomographic evaluation of glide path with nickel-titanium rotary PathFile in maxillary first molars curved canals
J Endod
(2012) - et al.
Correlative bacteriologic and micro-computed tomographic analysis of mandibular molar mesial canals prepared by self-adjusting file, reciproc, and twisted file systems
J Endod
(2013)
Cited by (22)
Shaping ability of rotary and reciprocating single-file systems in combination with and without different glide path techniques in simulated curved canals
2022, Journal of Dental SciencesCitation Excerpt :At EP point, WOGG showed less canal transportation than PG. Similar to the present study, Aydın et al. reported that in moderately curved (10°–20°) mesial canals of mandibular first molar, although no significant differences in root canal transport in the apical third was found between PG and WOGG, the WOGG showed better centering abilities at all thirds compared with the PG file system.24 This may arise from the more flexible alloy adopted by WOGG, and the smaller size/taper of the WOGG compared with the PG.24 The second part of the present study examined shaping ability of OC and RCB after the different glide path preparation techniques and without any glide path preparation.
Analysis of Instrumentation Protocols Regarding the Quality of Mesial Canal Preparation in Mandibular Molars: A Micro–computed Tomographic Study
2021, Journal of EndodonticsCitation Excerpt :The null hypothesis was partially rejected because there was a difference in relation to the percentage of the increase in canal volume between the groups analyzed. The mesial canals of mandibular molars are the root canals most commonly observed clinically and used in studies19,20; they have a challenging anatomy, causing difficulty in choosing the final apical file21. Because of anatomic variation, the diameter of the canal must be measured properly and before chemical-mechanical preparation, with the aim of personalizing the instrumentation and avoiding excessive wear22.
Precision-milled simulated curved root canals in bovine dentine for the assessment of chemo-mechanical root canal preparation
2024, International Endodontic Journal