Comparison of the effects of TripleGates and Gates-Glidden burs on cervical dentin thickness and root canal area by using cone beam computed tomography

Abstract

The search for new instruments to promote an appropriate cervical preparation has led to the development of new rotary instruments such as TripleGates. However, to the best of the authors' knowledge, there is no study evaluating TripleGates effect on the “risk zone” of mandibular molars. Objectives: The aim of this study was to evaluate the effects of a crown-down sequence of Gates-Glidden and TripleGates burs on the remaining cervical dentin thickness and the total amount of dentin removed from the root canals during the instrumentation by using cone beam computed tomography. The number of separated instruments was also evaluated.Material and Methods : Mesial roots of 40 mandibular first molars were divided into 2 equal groups: crown-down sequence of Gates-Glidden (#3, #2, #1) and TripleGates burs. Cervical dentin thickness and canal area were measured before and after instrumentation by using cone beam computed tomography and image analysis software. Student’s t-test was used to determine significant differences at p<0.05.Results : No significant differences (p>0.05) were observed between the instruments, regarding the root canal area and dentin wall thickness.Conclusion : Both tested instruments used for cervical preparation were safe to be used in the mesial root canal of mandibular molars.

Validation of cone beam computed tomography as a clinical imaging method for dentin thickness measurement in the danger zone of mandibular molars

“…Therefore, the present study compared the measurements performed on CBCT images to stereomicroscope images (direct measurement). The measurements found in this study corroborate the results of other studies using diverse methodologies to assess the danger zone 2 mm below furcation area 13,16,30,31 . The absence of differences between the two methods suggests that CBCT is an imaging diagnostic tool that may be used clinically (in patients), allowing professionals to control the risk of tearing due to excessive wear during root canal preparation.…”

Detection of Crack Formation Following Coronal Flaring With Three Different Instruments Using Two Evaluation Methods (In Vitro Study)

“…Moreover, pre-and postinstrumentation images were studied and presence of new defects were detected. This was similar to the methodology used by Hartmann et al (9) Sanfelice et al (10) and Souza et al (11). Cone Beam Computed Tomography Scanner system with a high resolution of (0.2 mm/0.125 mm voxel) was used in this study, respecting the as low as reasonably achievable principle (ALARA principle) that the best choice for diagnostic use with a shorter scanning time and reduced radiation exposure to the patient is (0.2-0.3mm) resolution (12).…”

The Effect of Gates-Glidden Drills on the Quality of Root Canal Treatment by Pre-Clinical Dental Students

“…It has been found that preparing the coronal portion of the root canal provides different benefits in irrigation efficacy, apical control, cone fit, and compaction procedures. In this regard, apical blockage, lodging, zipping, and perforations are less likely to occur [ 17 ], [ 18 ], [ 19 ]. Mollashahi et al, [ 20 ] reported adverse effects, especially in the curved canals declined while using GG, which can be attributed to the direct access of this instrument into canals.…”