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

Abstract 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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Shaping ability of 2Shape and NeoNiTi rotary instruments in preparation of curved canals using micro-computed tomography

BMC Oral Health ◽

10.1186/s12903-021-01961-x ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Ibrahim Faisal ◽

Rajab Saif ◽

Mona Alsulaiman ◽

Zuhair S. Natto

Keyword(s):

Computed Tomography ◽

Permanent Teeth ◽

Micro Ct ◽

Micro Computed Tomography ◽

Root Canals ◽

Group I ◽

Significant Difference ◽

Canal Transportation ◽

Shaping Ability ◽

Curved Root Canals

Abstract Background Various systems of nickel-titanium (NiTi) instrument have long been commercially available. However, the preparation of narrow and curved root canals has always been challenging. The purpose of this study was to compare the shaping ability of two NiTi systems (2Shape and NeoNiTi) in severely curved root canals with different morphological patterns using micro-computed tomography (Micro-CT). Methods A total of 22 human extracted permanent teeth of mandibular first molars, with the exact mesial angle of curvature of 25 and 35 degrees, according to Schneider’s technique, were distributed randomly into two groups (group I: 2Shape, group II: NeoNiTi) based on the rotary system used (n = 22). The groups were subdivided into two subgroups corresponding to the angle of canal curvature (25° and 35°) (n = 11). Canals were scanned using Micro-CT pre- and post-preparation to assess the volume of dentin removed; canal transportation; and canal centering ratio at 3, 6, and 9 mm from the apex. The Mann–Whitney U test was utilized to determine any significant differences between the two systems. The level of statistical significance was set at p < 0.05. Results There was no significant difference between the two groups in volume of dentin removed; canal transportation; and centering ability for 25° and 35° canal curvatures at 3, 6, and 9 mm from the apex (coronal, middle, and apical) thirds (p > 0.05). At the middle third, the NeoNiTi group demonstrated a statistically significant increase in volume of dentin removed for 35° canal curvatures compared to the 2Shape group. Conclusion Within the limitation of our in vitro study, 2Shape and NeoNiTi systems with severely curved canals were confirmed to be relatively safe in preparation and to respect original canal anatomy. Nevertheless, NeoNiTi instruments produced more centered preparation and minimal canal deviation compared to the 2Shape system.

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A micro-CT evaluation of the performance of rotary and reciprocating single-file systems in shaping ability of curved root canals

Brazilian Oral Research ◽

10.1590/1807-3107bor-2020.vol34.0039 ◽

2020 ◽

Vol 34 ◽

Author(s):

Manoel Damião SOUSA-NETO ◽

Bruno Monguilhott CROZETA ◽

Fabiane Carneiro LOPES ◽

Jardel Francisco MAZZI-CHAVES ◽

Rodrigo Dantas PEREIRA ◽

...

Keyword(s):

File Systems ◽

Micro Ct ◽

Root Canals ◽

Single File ◽

Ct Evaluation ◽

Shaping Ability ◽

Curved Root Canals

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Comparative Evaluation of Root Canal Transportation by Three NiTi Single-File Systems in Curved Canals: A Cone Beam Computed Tomography Study

International Journal of Dentistry ◽

10.1155/2018/4151692 ◽

2018 ◽

Vol 2018 ◽

pp. 1-6 ◽

Cited By ~ 1

Author(s):

Eshaghali Saberi ◽

Narges Farhad-Mollashahi ◽

Shima Bijari ◽

Mohammad Daryaeian

Keyword(s):

Computed Tomography ◽

Cone Beam Computed Tomography ◽

Root Canal ◽

Ex Vivo ◽

File Systems ◽

Cone Beam ◽

Single File ◽

Significant Difference ◽

Canal Transportation ◽

Level Of Significance

Introduction. This study is aimed at evaluating root canal transportation in the mesiobuccal canal of mandibular first molars prepared with One Shape, Reciproc, and M-One nickel titanium (NiTi) single-file rotary systems using cone beam computed tomography (CBCT). Materials and Methods. In this ex vivo study, CBCT scans of 45 extracted human mandibular first molars with 20–40° curvature were obtained. The teeth were randomly divided into three groups (n=15) for preparation of the mesiobuccal canal with One Shape, Reciproc, and M-One rotary systems according to the manufacturers’ instructions. CBCT scans were obtained again after canal preparation. Changes caused by preparation in the coronal, middle, and apical thirds were determined on CBCT scans and analyzed using the Kruskal–Wallis test at P≤0.05 level of significance. Results. No significant difference was noted in the amount of canal transportation among the three groups (P>0.05). M-One caused greater transportation in the apical third compared with Reciproc and One Shape, and One Shape caused greater transportation in the coronal third compared with other groups, although its magnitude was less than 0.3 mm. Conclusion. Reciproc, One Shape, and M-One are not significantly different in terms of canal transportation.

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The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1561 ◽

2014 ◽

Vol 15 (4) ◽

pp. 451-455 ◽

Cited By ~ 1

Author(s):

Dina Al-Sudani ◽

Hassan Kaabi ◽

Abdulrahman Al Gamdi ◽

Abdulla Al Dakheel

Keyword(s):

Root Canal ◽

Rotation Angle ◽

Mean Value ◽

Nickel Titanium ◽

Significance Level ◽

Single File ◽

Significant Difference ◽

Canal Transportation ◽

Group 2 ◽

Shaping Ability

ABSTRACT Purpose The purpose of the present study was to investigate and compare the effect of different reciprocating movements and angles on the shaping ability of the WaveOne and the single-file ProTaper F2 using cone beam computed tomography (CBCT). Materials and methods The mesiobuccal canals of 40 extracted maxillary molars, with curvatures of 20 to 45° were coded and randomly divided into 4 equal experimental groups according to the instrument used (ProTaper F2 file and WaveOne) and the reciprocation range, for both instruments, a 150° angle was used for cutting and a 30° angle was used for release. Group 1 — WaveOne primary 150° CCW rotation angle and 30° CW rotation angle; Group 2 — WaveOne 90° CCW rotation angle and 30° CW rotation angle; Group 3 — ProTaper F2 150° CW rotation angle and 30° CCW rotation angle; Group 4 — ProTaper F2 90° CW rotation angle and 30° CCW rotation angle. Canals were scanned before and after preparation using CBCT to evaluate the volumetric change, canal transportation and the canal centering ability at 2.6, 5.2 and 7.8 mm from the apex. The mean ± standard deviation (SD) values were analyzed, and the significance level was set at p≤ 0.05 Results There was no significant difference in the amount of dentin removed among the experimental groups, except that WaveOne 150°CCW 30°CW significantly showed the least volume of dentin removed (0.40 ± 0.9) at 7.8 mm. All rotary systems tested in the different groups resulted in canal transportation in different directions at all examined levels. WaveOne 150°CCW 30°CW, demonstrated the lowest mean value of root canal transportation in both the mesial and furcal directions and in both the coronal and apical directions compared to the other groups. At the 7.8 level, WaveOne 150°CCW 30°CW yielded the highest mean centering ratio, whereas ProTaper F2 CW 150° CCW 30° yielded the lowest, statistically significant at p≤ 0.05 Conclusion The results of the present study demonstrated that differences among various reciprocating motions and angles could affect the shaping ability of a single-file Nickel-titanium (NiTi) instrument. How to cite this article Al-Sudani D, Kaabi H, Gamdi AA, Dakheel AA. The Influence of Different Angles and Reciprocation on the Shaping Ability of Two Nickel-Titanium Rotary Root Canal Instruments. J Contemp Dent Pract 2014;15(4):451-455.

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Mechanical Preparation Showed Superior Shaping Ability than Manual Technique in Primary Molars - A Micro-Computed Tomography Study

Brazilian Dental Journal ◽

10.1590/0103-6440201601552 ◽

2017 ◽

Vol 28 (4) ◽

pp. 453-460 ◽

Cited By ~ 7

Author(s):

Lídia Regina da Costa Hidalgo ◽

Léa Assed Bezerra da Silva ◽

Graziela Bianchi Leoni ◽

Jardel Francisco Mazzi-Chaves ◽

Emily Eduardo da Silva Carvalho ◽

...

Keyword(s):

Computed Tomography ◽

Surface Area ◽

Primary Teeth ◽

Primary Molars ◽

3D Analysis ◽

Micro Ct ◽

Micro Computed Tomography ◽

Mechanical Preparation ◽

Canal Transportation ◽

Shaping Ability

Abstract The aim of the study was to evaluate canal preparation in primary molars with hand files, ProTaper Next and Self-Adjusting File (SAF) by 2D and 3D micro-computed tomography (micro-CT) analysis. Canals of 24 primary molars were prepared with hand files (HF), ProTaper Next (PTN) and SAF (n=8/group). The teeth were scanned before and after root canal preparation and the pre- and postoperative micro-CT images were reconstructed. Changes in 2D (area, perimeter, roundness, minor and major diameter) and 3D [volume, surface area, structure model index (SMI)] morphological parameters, as well as canal transportation and lateral perforations were evaluated (Kruskal-Wallis and ANOVA; a=0.05). SAF presented smaller changes in minor diameter, volume and surface area compared with HF and PTN (p<0.05). PTN presented more circular canals after preparation. 3D analysis revealed greater transportation in HF. PTN and SAF presented more centered canal preparation, especially in curved areas. SAF and HF presented, respectively, the lowest (0.05±0.02 and 0.07±0.04) and highest (0.14±0.11 and 0.29±0.17) apical transportation. There were fewer lateral perforations in SAF (4.2%) and PTN (7.7%) than in HF (47.8%) (p<0.05). In primary molars, mechanical preparation showed better shaping ability than hand files, promoting more centered preparations and lower occurrence of lateral perforations and canal transportation. Clinical Relevance: Manual instrumentation is still reported as the main choice in the primary teeth preparation; however, studies have shown limitations in its use. The morphological characteristics of primary teeth and the limited knowledge of shaping procedures in these teeth using mechanical preparation become a challenge for clinical practice and might impair the predictability of endodontic treatment.

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Comparison of Apical Transportation, Centering Ability and Cyclic Fatigue Resistance of Four Rotary File Systems

Dental Journal of Advance Studies ◽

10.1055/s-0038-1672008 ◽

2015 ◽

Vol 03 (01) ◽

pp. 012-019

Author(s):

Ankita Sood ◽

Varun Jindal ◽

Ajay Chhabra ◽

Arvind Arora ◽

Ankur Vats

Keyword(s):

Fatigue Resistance ◽

Fatigue Testing ◽

File Systems ◽

Cyclic Fatigue ◽

Root Canal Preparation ◽

Maxillary Molars ◽

Apical Transportation ◽

Significant Difference ◽

Before And After ◽

Canal Transportation

Abstract Aim: The aim of this study was to evaluate the apical transportation, centering ability and cyclic fatigue resistance of Hero shaper, Twisted file, Hyflex file and RACE rotary file systems. Methods: Mesiobuccal roots of eighty maxillary molars were divided into four groups and instrumented with Hero shaper, Twisted file, Hyflex file and RACE rotary file systems with a final apical size being 25/.04. Apical deviation was assessed by the radiographic platform method that enables obtaining superimposed images of the first and last instrument used in root canal preparation in the same radiograph. Apical transportation was measured in millimeters with the aid of the AUTOCAD 2008 software. Forty canals were sectioned at 7mm from the apex and stereomicroscopic Images were taken at 6x magnification before and after instrumentation for evaluation of centering ability. The cyclic fatigue testing was conducted with the instrumentrotating freely at angles of curvature of 45 degree. Total 10 instruments were tested in each group. The instruments were rotated at 400rpm using the X-smart motor (Dentsply, Maillefer) until fracture occurred. Results: There was no statistically significant difference between the four groups in apical transportation and centering ability whereas twisted files showed the maximum cyclic fatigue resistance. Conclusion: The different rotary file systems provided minimum canal transportation and the twisted file performed significantly better in terms of cyclic fatigue resistance.

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Micro-Computed Tomography (Micro-CT) Evaluation of Effects of Different Rotary Glide Path Techniques on Canal Transportation and Centering in Curved Root Canals

Medical Science Monitor ◽

10.12659/msm.916112 ◽

2019 ◽

Vol 25 ◽

pp. 6351-6358

Author(s):

Gabrielė Česaitienė ◽

Tadas Venskutonis ◽

Vita Mačiulskienė ◽

Vaidotas Cicėnas ◽

Vykintas Samaitis ◽

...

Keyword(s):

Computed Tomography ◽

Micro Ct ◽

Micro Computed Tomography ◽

Root Canals ◽

Glide Path ◽

Ct Evaluation ◽

Canal Transportation ◽

Curved Root Canals

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Shaping Ability of XP Endo Shaper File in Curved Root Canal Models

International Journal of Dentistry ◽

10.1155/2020/4687045 ◽

2020 ◽

Vol 2020 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Abdulmohsen Alfadley ◽

Abdalrhman Alrajhi ◽

Hamad Alissa ◽

Faisal Alzeghaibi ◽

Lubna Hamadah ◽

...

Keyword(s):

Body Temperature ◽

File Systems ◽

Lower Number ◽

Significance Level ◽

Root Canals ◽

Shaping Time ◽

Significant Difference ◽

Before And After ◽

Canal Shaping ◽

Shaping Ability

The aim of this study was to assess the shaping ability of the XP Shaper (XPS) file in severely curved canal models under simulated body temperature and compare it with that of the WaveOne Gold (WOG) file. Ninety-six simulated root canals were equally distributed into XPS and WOG systems to be shaped by eight files each. Files were assessed under a stereomicroscope prior to canal shaping to detect deformation if any. The canals were shaped at 35 ± 1°C using the X-Smart Plus motor. Images of the canals were obtained before and after instrumentation using a stereomicroscope to measure the amount of removed resin from both the inner and outer curvature sides at apex (0 mm) and 3 mm and 6 mm from the apex. The shaping time was calculated. The data were statistically analyzed by the independent t-test at 5% significance level. The XPS and WOG systems shaped the canals in 37.0 ± 9.5 and 62.6 ± 11.3 seconds (P<0.05), respectively. At the apex level, the amount of resin removal in both sides did not show a significant difference between the tested groups (P>0.05). At 3 mm and 6 mm levels, the WOG removed more resin than XPS at both sides (P<0.05). In XPS, deformation was observed in four files: one file after the first use, one file after the fourth use, and two files after the sixth use. In WOG, two files were deformed: one file after the fifth use and one file after the sixth use. One XPS file was fractured after the sixth use. In short, XPS and WOG files can be used in shaping severely curved canals as they showed the ability to maintain the original shape with minimal transportation. Both file systems showed signs of deformation after use with a lower number of deformed files observed in WOG throughout the experiment.

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Shaping Ability of 4 Different Single-file Systems in Simulated S-shaped Canals

Journal of Endodontics ◽

10.1016/j.joen.2014.11.019 ◽

2015 ◽

Vol 41 (4) ◽

pp. 548-552 ◽

Cited By ~ 24

Author(s):

Abdulrahman Mohammed Saleh ◽

Pouyan Vakili Gilani ◽

Saeid Tavanafar ◽

Edgar Schäfer

Keyword(s):

File Systems ◽

Single File ◽

Shaping Ability

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Geometric Analysis of Maxillary First Premolar Prepared by Two Nickel-Titanium Rotary Instruments

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1510 ◽

2014 ◽

Vol 15 (2) ◽

pp. 174-180 ◽

Cited By ~ 3

Author(s):

Dina Al-Sudani ◽

Majed Almalki ◽

Saad Al-Shahrani ◽

Michael Ahlquist

Keyword(s):

Cross Sections ◽

Root Canal ◽

Geometric Analysis ◽

Microcomputed Tomography ◽

Nickel Titanium ◽

Rotary Instruments ◽

Significant Difference ◽

Before And After ◽

Canal Transportation ◽

Shaping Ability

ABSTRACT Aim The present study was conducted with the aim of evaluating and comparing the shaping ability of two Nickel-titanium rotary instruments, with two disparate design features, on root canal geometry of extracted human maxillary first premolars using microcomputed tomography. Study design Twenty four bifurcated maxillary first premolars were divided into two groups and embedded in a rubber-based impression material. Both groups were submitted to microcomputed tomography before and after canal preparation (buccal and palatal) with either ProFile Vortex or Revo-S rotary instruments. Images were reconstructed and cross-sections corresponding to a distance 1, 2, 3, 4, 5, 6, and 7 mm from the anatomical apex were selected for canal transportation analysis. Volume changes were also measured. Results The degree and direction of canal transportation were non-significant for both instruments. Statistically significant differences were observed only between levels in the buccal canal in both groups. There was no significant difference between the two rotary systems in regards to the volume of dentin removed. Conclusion Our findings showed that ProFile Vortex and Revo-S instruments respected the original root canal anatomy and behaved similarly. ProFile Vortex rotary systems produced with innovative process were concluded to shape the upper maxillary premolar by leading minimal canal transportation, similar to Revo-S, rotary systems produced from traditional process. How to cite this article Al-Sudani D, Almalki M, Al-Shahrani S, Ahlquist M. Geometric Analysis of Maxillary First Premolar Prepared by Two Nickel-Titanium Rotary Instruments. J Contemp Dent Pract 2014;15(2):174-180.

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