Root canal centering ability of rotary cutting nickel titanium instruments: A meta-analysis

Gundappa, Mohan; Bansal, Rashmi; Khoriya, Sarvesh; Mohan, Ranjana

doi:10.4103/0972-0707.144567

Cited by 32 publications

(25 citation statements)

References 15 publications

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“…Although these variations are valuable in providing different alternatives that can cope with the variations in the root canal system, however, the performance of these instruments inside each canal is not always predictable. [3][4][5] The invention of the NiTi rotary instrumentation was advantageous in minimizing the procedural errors and time of treatment. 6 A new technique for instrumentation was introduced by Yared, where a single file was used in a reciprocating motion rather than rotation, overcoming the large sequence of files used in a rotation motion.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Shaping Ability of Different Single-File Systems Using Microcomputed Tomography

2020

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Objectives To evaluate the shaping ability of four different single-file systems using micro-computed tomography (micro-CT). Materials and Methods Eighty mesiobuccal and mesiolingual canals of permanent mandibular molars were randomly assigned to four groups according to the file used; WaveOne Gold, RECIPROC Blue, HyFlex EDM, and One Shape (n = 20). The samples were scanned using micro-CT for the preinstrumentation record; then the canals were instrumented and scanned for the postinstrumentation records. Statistical Analysis The data were then analyzed statistically using one-way analysis of variance (ANOVA) with the level of significance set at α = 0.05. Results The results of canal centering ratio and canal transportation showed that no significant difference was found among the four file groups at the middle and the coronal levels. However, a significant difference was found at the apical level (p < 0.05), where WaveOne Gold showed the best centering ratio and the least amount of canal transportation. The change in the canal volume was significant at the coronal level (p < 0.05), whereas the change in the canal volume was higher for the HyFlex EDM group than the other groups. No significant difference was found between the other groups at the apical level, middle level, or in the total percentage of canal volume. Conclusion WaveOne Gold produced a more centralized canal preparation with a lesser amount of transportation at the apical level. HyFlex EDM showed the highest canal volumetric change at the coronal level. The interim design of the endodontic files has a high impact on the behavior of the file inside the root canal.

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Section: Introductionmentioning

confidence: 99%

Comparison of Shaping Ability of Different Single-File Systems Using Microcomputed Tomography

2020

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“…The possible reason might be as SAF has flexible and compressible hollow tube which adapts to canal anatomy and due to its scrapping action it removed minimal circumferential dentin than protaper rotary. [12,13] In the present study, SAF was centered in both bucco lingually and mesio distally. The possible reason might be due to its file and scrapping action.…”

Section: Discussionmentioning

confidence: 47%

Comparative Evaluation of Canal Centering Ability between Protaper Rotary and Self Adjusting File in Oval Shaped Canals – A Cone Beam Computed Tomographic Analysis

Himabindu¹,

Shantipriya²,

G³

et al. 2017

AIMDR

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Background: Self Adjusting Files have been introduced to overcome the disadvantage of protaper rotary files, especially for oval root canal centering. Aims and Objectives: To evaluate the canal centering ability between rotary protaper and self adjusting file in oval shaped canals using cone beam computed tomography. Methods: The study was carried out on 20 single rooted mandibular premolars. To compare the canal centering ability produced by different techniques, pre-instrumentation, post-instrumentation, cross section images of specimen at 3, 6 and 9 mm from the apex were obtained from the 3D CBCT images of each individual group. The images captured digitally using Image Tools Software were compared. Results: Inter group comparison of mean ratio of both the groups at 3, 6 and 9 mm after preparation of canal showed statistically significant difference between both the groups (p<0.05). Intra group comparison of mean ratio of both the groups at 3, 6 and 9 mm after preparation of canal showed that the difference between both the groups was not statistically significant (p>0.05). Conclusion: The canal centering ability of self adjusting file was efficient than protaper rotary files.

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“…Afterwards, a dynamic FEA was proposed for the visualization of the instrument mechanical stresses during shaping [17][18][19][29][30][31][32]. In all these studies, the differences found between the instruments were due to the geometry of the instruments and to the alloy stiffness: especially, it was demonstrated how the most rigid instruments caused the highest stress on the apical portion of the canal, confirming that these two instrument characteristics influence their mechanical behavior [4,19,26,33,34].…”

Section: Discussionmentioning

confidence: 95%

“…Instrument alloy and other geometrical variables influence the shaping behavior of the endodontic files [1,2,[4][5][6]9,10,12]. The super-elasticity of modern NiTi instruments reduces the occurrence of canal aberrations and allows for a more centered root canal preparation [9,10,26]. Canal centering ability is essential to provide a less invasive shaping, without removing exceeding radicular structure [27,28].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of Pressure Distribution against Root Canal Walls of NiTi Rotary Instruments by Finite Element Analysis

et al. 2020

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The aim of this study was to evaluate the contact pressure distribution of two different nickel-titanium (NiTi) endodontic rotary instruments against the root canal walls and to virtually predict their centering ability during shaping with finite element analysis (FEA). Resin blocks simulating root canals were used. One was shaped with ProGlider and ProTaper Next (PTN) X1-X2 and one with ScoutRace and BioRace (BR) 1, 2 and 3. Both resin blocks were virtually replicated with computer-aided design (CAD) software. The endodontic instruments ProTaper Next (PTN) X2 and BioRace BR3 were also replicated with CAD. The NiTi instruments and the shaped blocks geometries were discretized and exported for FEA. The instrument rotation in the root canals was simulated. The finite element simulation was performed by applying an insertion and extraction force of 2.5 N with a constant rotational speed (300 rpm). To highlight possible differences between pressure distributions against the root canal portions outside and inside the canal curvature, the parameter Var was originally defined. Var values were systematically lower for PTN X2, revealing a better centering ability. FEA proved effective for the virtual prediction of the centering ability of NiTi instruments during an early design phase without the use of prototypes.

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Root canal centering ability of rotary cutting nickel titanium instruments: A meta-analysis

Cited by 32 publications

References 15 publications

Comparison of Shaping Ability of Different Single-File Systems Using Microcomputed Tomography

Comparison of Shaping Ability of Different Single-File Systems Using Microcomputed Tomography

Comparative Evaluation of Canal Centering Ability between Protaper Rotary and Self Adjusting File in Oval Shaped Canals – A Cone Beam Computed Tomographic Analysis

Evaluation of Pressure Distribution against Root Canal Walls of NiTi Rotary Instruments by Finite Element Analysis

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