Comparative Assessment of the Effects of Gates-Glidden, Largo, LA-Axxess, and New Brazilian Drill CPdrill on Coronal Pre-enlargement: Cone-beam Computed Tomographic Analysis

Flores, Cláudia Bohrer; Montagner, Francisco; Gomes, Brenda Paula Figueiredo de Almeida; Dotto, Gustavo Nogara; Schmitz, Márcia da Silva

doi:10.1016/j.joen.2013.08.028

Cited by 14 publications

(30 citation statements)

References 26 publications

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“…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.…”

Section: Discussionsupporting

confidence: 88%

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

Corrêa

Flores

Marquezan

et al. 2018

Rev. da Fac. de Odontologia, UPF

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Objective: to verify the accuracy of cone beam computedtomography (CBCT) for measuring dentin thicknessin the danger zone of mandibular molars in order to validatethis method to be used as a clinical auxiliary. Materialsand method: dentin thickness of the distal wall ofmesial canals was measured at 2 mm of furcation areain ten mandibular molars before and after preparation ofcervical and middle thirds. CBCT (0.25 mm voxel size)and stereomicroscopy images were acquired twice foreach sample. CBCT axial images and stereomicroscopeimages were evaluated by a calibrated examiner. Statisticalanalysis was performed using Mann-Whitney testin order to investigate whether CBCT images providedtrusted values. Results: mean values of initial (1.23 versus1.24 mm) and final measurements (0.88 versus 0.87mm) obtained with, respectively, CBCT and stereomicroscopemethods did not show statistical differences(P > 0.5). Conclusion: CBCT images provide high accuracyfor measuring dentin thickness in the danger zoneof mandibular molars.Keywords: Cone beam computed tomography. Endodontics.Root canal preparation.

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Section: Discussionsupporting

confidence: 88%

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

Corrêa

Flores

Marquezan

et al. 2018

Rev. da Fac. de Odontologia, UPF

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“…It has been found that preflaring the coronal portion of the root canal provides advantages in irrigation efficacy, apical control, cone fit, and compaction procedures 9 , 10 , 13 , 16 , 18 . However, excessive dentin removal, as a result of cervical preflaring, especially in curved and narrow canals, may cause perforation of the concavity located in the furcation region 5 , 6 , 11 , 14 .…”

Section: Introductionmentioning

confidence: 99%

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

Sousa¹,

Andrade

Silva

et al. 2015

J. Appl. Oral Sci.

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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.

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“…The Gates Glidden #2 did not significantly decrease the residual dentin thickness in the coronal third of mandibular molars, preserving their mechanical integrity [20]. Recently, Flores et al [16] concluded that Gates Glidden #3 provided adequate cervical preparation of the root canals. All these findings are in accordance with other studies which also evaluated remaining dentin thickness/walls after cervical preflaring [17].…”

Section: Discussionmentioning

confidence: 97%

“…Three instruments were used for cervical preflaring: Gates Glidden, WXN 25.07 and Easy 25.08. The use of Gates-Glidden burs sizes #2 and #3 with a 0.7 mm and 0.9 mm diameter, respectively, was determined based on previous studies that have also used these diameters to promote cervical preparation [16,17]. WXN (25.07) and Easy (25.08) NiTi instruments were used in continuous rotary motion to prepare the cervical third of the root canals.…”

Section: Discussionmentioning

confidence: 99%

Influence of cervical preflaring and root canal preparation on the fracture resistance of endodontically treated teeth

et al. 2020

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Background: Evaluate the fracture resistance of endodontically treated teeth after cervical preflaring and root canal preparation and to assess the volume of the root canal and the amount of remaining root dentin before and after cervical preflaring. Methods: Forty-four mandibular incisors were selected using micro-CT scanning and distributed into 4 groups (n = 11) according to the instrument used for cervical preflaring: control group -no cervical preflaring; Gates Gliddenburs size #2 and #3; WXN -25.07 Navigator instrument; and Easy -25.08 ProDesign S instrument. Coronal opening was performed, and the canals were prepared with Wave One Gold Primary and filled with an epoxy-resin based sealer and gutta-percha cones. Micro-CT scans were performed before and after root canal instrumentation. All images were reconstructed and assessed for the thickness of mesial and distal root dentin at 3 mm and 5 mm from the cement -enamel junction and for the volume of cervical portion of the canal after preparation. Fracture resistance test was performed applying compressive loads at a crosshead speed of 0.5 mm/min, applied on the palatal aspect of specimens at 135°along the long axis of the tooth. The data were analyzed using ANOVA and Tukey's test (P = .05). Results: Cervical preflaring and canal preparation reduced the dentin thickness (P < .05) and increased the canal volume (P < .05) in all groups at 3 mm an 5 mm. Cervical preflaring with Gates Gliden burs reduced the fracture resistance of endodontically treated teeth (P < .05). Conclusions: All instruments reduced the dentin thickness and increased the canal volume in the cervical at 3 mm and 5 mm. Gates Glidden reduced fracture resistance of mandibular incisors submitted to cervical preflaring, whereas NiTi instruments did not. Clinical relevance: Cervical preflaring assumes particular importance previously to the root canal preparation because it minimizes the occurrence of operative accidents, and permits more accurate determination of working length and the apical diameter.

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Comparative Assessment of the Effects of Gates-Glidden, Largo, LA-Axxess, and New Brazilian Drill CPdrill on Coronal Pre-enlargement: Cone-beam Computed Tomographic Analysis

Cited by 14 publications

References 26 publications

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

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

Influence of cervical preflaring and root canal preparation on the fracture resistance of endodontically treated teeth

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