An in vitro study to determine fracture resistance of tooth roots after different instrumentation techniques

Reddy, Marri Shilpa; Reddy, Pallavi; Reddy, T Jaisimha; Balagopal, Sundaresan; Amalavathy, Kurinji; Reddy, G Jaishekar; Harini, T; Reddy, S Sreedhar

doi:10.4103/2277-8632.191839

Cited by 4 publications

(2 citation statements)

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“…These findings correlate with Rao et al [31] who found that K files removed a lesser amount of dentin apically. The results were complementary to the findings of Reddy et al [32] and Yoshmine et al [33], who found that conventional hand instrumentation with 0.02 tapered SS K files removed the least amount of dentin but in contrast to study done by Shahriari et al [34] who demonstrated found that SS hand instruments removes more amount of dentin in all the sections as compared to ProFile rotary instruments and this difference in the cutting pattern may be due to the curved root canals included in their study. The increasing taper instruments or shaping files(s) have enhanced flexibility in the middle region and at the tip.…”

Section: Discussionsupporting

confidence: 80%

Cone Beam Computed Tomographic Evaluation of Effect of Different Taper and Technique of Biomechanical Preparation on Root Dentin Thickness: An in Vitro Study

Sharma¹

2021

J Pediatr Dent

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Objective:The aim of the present study was to evaluate the remaining dentin thickness (RDT) after instrumentation with different endodontic file systems through CBCT. Materials and Methods:In the present study, 40 extracted, untreated human mandibular Premolars, with curvature less than 20° were divided into four groups (n=10, each group). Biomechanical preparation was done according to the group where, Group 1 included SS Hand K files, Group 2 included Hand ProTaper files, Group 3 included ProFile rotary files, and Group 4 included ProTaper Gold rotary files. CBCT images of Pre and Post instrumented canals were taken, and RDT was measured at 3 mm, 5 mm, and 7 mm from the radiographic root apex. Results:Results of the present study showed that Group 2 removed the maximum amount of root dentin compared to other groups, Group 3 and 4 instrumentation techniques removed almost equal amounts of dentin while Group 1 removed the least amount of root dentin. Conclusion:It can be concluded that engine driven Ni-Ti instruments better maintain the anatomy of the root canal during instrumentation with lesser removal of root dentin as compared to hand instruments.

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Section: Discussionsupporting

confidence: 80%

Cone Beam Computed Tomographic Evaluation of Effect of Different Taper and Technique of Biomechanical Preparation on Root Dentin Thickness: An in Vitro Study

Sharma¹

2021

J Pediatr Dent

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“…A reduced dentin thickness tends to increase the magnitude of tensile stress [ 13 ]. Finite element analysis demonstrated canal curvature to be more significantly associated with fracture resistance of teeth than external root morphology [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Comparative Evaluation of Debris Extrusion, Remaining Dentin Thickness and Fracture Resistance of Endodontically Treated Teeth Using Rotary and Reciprocating Endodontic File Systems: An In Vitro Study

Jaggi,

Mulay,

Tandale

et al. 2023

Cureus

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Background: Preventing the apical extrusion of debris during instrumentation is of paramount importance to reduce the occurrence of flare-ups in endodontically treated teeth. Furthermore, an essential requirement for the longevity and strength of an endodontically treated tooth and its ability to resist fracture is the preservation of residual dentin thickness during instrumentation. The aim of this study was to compare the amount of debris extrusion, remaining dentin thickness at the coronal third, middle third, apical third, and the fracture resistance of the teeth using rotary (TruNatomy; Dentsply Sirona, Charlotte, NC) and reciprocating (WaveOne Gold; Dentsply Sirona) endodontic file systems. Methods: An in vitro study included 52 single-rooted, oval canal shaped teeth that underwent exploration and initial cleaning with a no. 15 K-file. The prepared canals were then randomly assigned to two groups: Group I, with instrumentation with the TruNatomy rotary file (n=26) and Group II, with instrumentation with the WaveOne Gold reciprocating file. Parameters like debris extrusion, remaining dentin thickness, and fracture resistance were evaluated in both the groups. Analysis was performed using a paired t - test for the assessment of difference between groups and one-way ANOVA test followed by the post-hoc Tukey test for difference between the coronal, middle and apical third for each study group. Results: The results revealed no significant difference (t=0.454, p=0.652) between the TruNatomy rotary file and WaveOne Gold reciprocating file in apical extrusion of debris after their use in root canal therapy. For the remaining dentin thickness, a significant difference was present between the TruNatomy rotary file and WaveOne Gold reciprocating rotary file at the coronal (t=5.766, p<0.0001) and middle (t=3.690, p=0.001) levels. The mean fracture resistance was significantly more (t=15.877, p<0.0001) with the TruNatomy rotary file compared to the WaveOne Gold reciprocating rotary file. Conclusion: The TruNatomy rotary file system outperformed the WaveOne Gold reciprocating file system in terms of maintaining the remaining dentin thickness and providing improved fracture resistance. Nevertheless, debris extruded apically was comparable between the TruNatomy rotary file system and the WaveOne Gold reciprocating file system.

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The “Butterfly Effect” and Its Correlation to the Direction of the Fracture Line in Root Dentin

Sodvadiya

Bhat

Shetty

et al. 2021

Journal of Endodontics

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An in vitro study to determine fracture resistance of tooth roots after different instrumentation techniques

Cited by 4 publications

References 0 publications

Cone Beam Computed Tomographic Evaluation of Effect of Different Taper and Technique of Biomechanical Preparation on Root Dentin Thickness: An in Vitro Study

Cone Beam Computed Tomographic Evaluation of Effect of Different Taper and Technique of Biomechanical Preparation on Root Dentin Thickness: An in Vitro Study

Comparative Evaluation of Debris Extrusion, Remaining Dentin Thickness and Fracture Resistance of Endodontically Treated Teeth Using Rotary and Reciprocating Endodontic File Systems: An In Vitro Study

The “Butterfly Effect” and Its Correlation to the Direction of the Fracture Line in Root Dentin

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