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Canal Transportation and Volumetric Dentin Removal Abilities of Ni-Ti Rotary File Systems in Curved Primary Root Canals: CBCT Study. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11199053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Current improvements in nickel-titanium (Ni-Ti) rotary file systems have created a paradigm shift in the root canal therapy of primary teeth. Therefore, it is necessary to perform a comprehensive evaluation regarding the efficiencies of newly manufactured instruments for different parameters. The current study was conducted to evaluate the abilities of RaceEvo, R-Motion, ProTaper Gold (PTG) systems in curved primary root canals with regard to the patterns of canal transportation and volumetric dentin removal by using cone-beam computed tomography (CBCT). Two experimental sets were designed following the determination of experimental groups by using pre- and post-operative CBCT data: canal transportation and volumetric dentin removal. The highest amount of canal transportation was significantly detected in the PTG group in comparison to RaceEvo and R-Motion groups. When the mean values of volumetric dentin removal data were analyzed across all groups, the PTG group again exhibited the significantly highest value of dentin removal volumetrically, compared to RaceEvo, R-Motion and manual instrumentation groups. It is possible to state that R-Motion and RaceEvo rotary systems could be used as reliable alternatives without causing adverse mechanical effects and maintaining the original root canal anatomy of curved primary root canal systems compared with PTG rotary systems and manual instrumentation, with a high diagnostic sensitivity of CBCT in pediatric endodontics when the alternative methods are not adequate.
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Faraj BM. Root canal curvature as a prognostic factor influencing the diagnostic accuracy of radiographic working length determination and postoperative canal axis modification: an in vitro comparative study. BMC Oral Health 2021; 21:90. [PMID: 33653318 PMCID: PMC7923826 DOI: 10.1186/s12903-021-01446-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 02/12/2021] [Accepted: 02/18/2021] [Indexed: 11/30/2022] Open
Abstract
Background Radiographic analysis of tooth morphology is mandatory for accurate calibration of the degree of canal curvature angle and radiographic working length to its real dimensions in case difficulty assessment protocols. This study aimed to determine the impact of the degree of root canal curvature angle on maintaining the real working length and the original canal axis of prepared root canals using a reciprocating rotary instrumentation technique. Methods Radiographic image analysis was performed on 60 extracted single-rooted human premolar teeth with a moderate canal curvature (10°–25°) and severe canal curvature (26°–70°). Working length and longitudinal canal axis were determined using cone-beam computed tomography (CBCT) and digital periapical radiography. The real canal length was determined by subtracting 0.5 mm from the actual canal length. Root canals were prepared using the WaveOne Gold reciprocating file (Dentsply Maillefer, Ballaigues, Switzerland). Results There was no significant relation of the degree of canal curvature angle to the accuracy of radiographic working length estimated on CBCT and digital periapical radiographic techniques (P > 0.05). Postinstrumentation changes in the original canal axis between moderate and severe canal curvature angles, assessed on CBCT and periapical digital radiographic images were statistically non-significant (P > 0.05). Conclusions A standardized digital periapical radiographic method performed similarly to the CBCT technique near to its true working length. No significant interaction exists between the diagnostic working length estimation, postoperative root canal axis modification, and the degree of canal curvature angle, using reciprocating rotary instrumentation technique.
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Affiliation(s)
- Bestoon Mohammed Faraj
- College of Dentistry, Conservative Department, University of Sulaimani, Madame Mitterand Street 30, 46001, Sulaimani, Kurdistan Region, Iraq.
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A Critical Review of Methods for Quantitative Evaluation of Root Canal Transportation. J Endod 2021; 47:721-731. [PMID: 33587997 DOI: 10.1016/j.joen.2021.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 11/22/2022]
Abstract
INTRODUCTION A comparison between root canal transportation studies is nearly impossible because of nonstandardized transportation evaluation methods. The aim of the present review was to search, compare, and critically discuss transportation evaluation methods. METHODS A search of PubMed, Web of Science, Scopus, ScienceDirect, and reference lists of articles was conducted up to March 2020 using appropriate key words to identify transportation evaluation methods. The methods in the included articles were extracted, compared, and categorized. RESULTS Seventy-four articles using original methods were selected. All studies share 3 main steps: image acquisition, image measurements, and calculation of parameters. Images were acquired by photography, radiography, and computed tomographic imaging. Two types of measurements were used: the amount of removed material and the canal center point distance. The parameters were calculated and reported as distance or ratio. Relationships between the different transportation parameters were found and confirmed with mathematical simulation. CONCLUSIONS Although methods were proposed as being novel, similarities between them were found, enabling the classification of the methods and identifying correlations. The canal center point distance is the most suitable for the description of canal transportation because it is comprehensible and it relates to the mathematical concept of translation. Removed material-based measurements are double the value of the canal center point distance. Ratio parameters are not suitable for reporting transportation.
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Duque JA, Vivan RR, Duarte MAH, Alcalde MP, Cruz VM, Borges MMB, Bramante CM. Effect of larger apical size on the quality of preparation in curved canals using reciprocating instruments with different heat thermal treatments. Int Endod J 2019; 52:1652-1659. [DOI: 10.1111/iej.13165] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 05/23/2019] [Indexed: 12/15/2022]
Affiliation(s)
- J. A. Duque
- Department of Dentistry, Endodontics, and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru SP Brazil
| | - R. R. Vivan
- Department of Dentistry, Endodontics, and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru SP Brazil
| | - M. A. H. Duarte
- Department of Dentistry, Endodontics, and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru SP Brazil
| | - M. P. Alcalde
- Department of Dentistry, Endodontics, and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru SP Brazil
| | - V. M. Cruz
- Department of Dentistry, Endodontics, and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru SP Brazil
| | - M. M. B. Borges
- Department of Dentistry, Endodontics, and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru SP Brazil
| | - C. M. Bramante
- Department of Dentistry, Endodontics, and Dental Materials School of Dentistry of Bauru University of São Paulo Bauru SP Brazil
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Pansheriya E, Goel M, Gupta KD, Ahuja R, Kaur RD, Garg V. Comparative Evaluation of Apical Transportation and Canal Centric Ability in Apical Region of Newer nickel-titanium File Systems Using cone-beam computed tomography on Extracted Molars: An In Vitro Study. Contemp Clin Dent 2018; 9:S215-S220. [PMID: 30294147 PMCID: PMC6169273 DOI: 10.4103/ccd.ccd_17_18] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Background: Objective in root canal preparation is to develop a shape that tapers from apical to coronal, maintaining the original canal shape. With advent of instruments manufactured from nickel-titanium (NiTi) alloys, there was a significant improvement of quality of root canal shaping, with predictable results and less iatrogenic damage. Aim: The aim of the study was to evaluate the canal centric ability and apical transportation in apical region of newer NiTi file system in root canal using cone-beam computed tomography (CBCT) on extracted molars. Materials and Methods: Root canal of thirty extracted human permanent teeth with mature root apices with 20°–40° of curvature were collected and divided into three groups after initial bio-mechanical preparation: Group 1: canal prepared using ProTaperNext (PTN) file system; Group 2: canal prepared using Mani silk system; and Group 3: canal prepared using V-taper file system. All samples were scanned before and after biomechanical preparation using CBCT. The data collected were evaluated using the Kruskal–Wallis analysis of variance test and Mann–Whitney U-test. Results: It was observed that in apical region Group I (PTN) showed significantly lower mean apical transportation and canal centric ability as compared to Group II (Mani Silk) and Group III (V-taper). Conclusion: It was concluded that PTN rotary system has no canal transportation and maintained centric ability in comparison to Mani and V-taper rotary file system in apical region of curved root canal.
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Affiliation(s)
- Ekta Pansheriya
- Department of Pedodontics and Preventive Dentistry and Daswani Dental College and Research Centre, Kota, Rajasthan, India
| | - Manish Goel
- Department of Pedodontics and Preventive Dentistry and Daswani Dental College and Research Centre, Kota, Rajasthan, India
| | - Kapil Dev Gupta
- Department of Pedodontics and Preventive Dentistry and Daswani Dental College and Research Centre, Kota, Rajasthan, India
| | - Ravish Ahuja
- Department of Pedodontics and Preventive Dentistry and Daswani Dental College and Research Centre, Kota, Rajasthan, India
| | - Rupinder Deep Kaur
- Department of Pedodontics and Preventive Dentistry and Daswani Dental College and Research Centre, Kota, Rajasthan, India
| | - Vishal Garg
- Department of Pedodontics and Preventive Dentistry, Maulana Azad Institute of Dental Sciences, New Delhi, India
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Jara CM, Hartmann RC, Böttcher DE, Souza TS, Gomes MS, Figueiredo JAP. Influence of apical enlargement on the repair of apical periodontitis in rats. Int Endod J 2018; 51:1261-1270. [DOI: 10.1111/iej.12949] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 04/30/2018] [Indexed: 11/28/2022]
Affiliation(s)
- C. M. Jara
- Pontifical Catholic University of Rio Grande do Sul - Porto Alegre; Porto Alegre Brazil
| | - R. C. Hartmann
- Pontifical Catholic University of Rio Grande do Sul - Porto Alegre; Porto Alegre Brazil
| | - D. E. Böttcher
- Pontifical Catholic University of Rio Grande do Sul - Porto Alegre; Porto Alegre Brazil
| | - T. S. Souza
- Pontifical Catholic University of Rio Grande do Sul - Porto Alegre; Porto Alegre Brazil
| | - M. S. Gomes
- Pontifical Catholic University of Rio Grande do Sul - Porto Alegre; Porto Alegre Brazil
| | - J. A. P. Figueiredo
- Pontifical Catholic University of Rio Grande do Sul - Porto Alegre; Porto Alegre Brazil
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Mohammadian F, Sadeghi A, Dibaji F, Sadegh M, Ghoncheh Z, Kharrazifard MJ. Comparison of Apical Transportation with the Use of Rotary System and Reciprocating Handpiece with Precurved Hand Files: An In Vitro Study. IRANIAN ENDODONTIC JOURNAL 2017; 12:462-467. [PMID: 29225642 PMCID: PMC5722116 DOI: 10.22037/iej.v12i4.16063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Introduction: Success of root canal treatment depends on several factors; among which, maintaining the original canal path during mechanical preparation is extremely important. This in vitro study aimed to compare apical transportation using RaCe NiTi rotary system and precurved stainless steel (SS) hand files in a reciprocating handpiece. Methods and Materials: Mesiobuccal canals of 40 extracted human mandibular first and second molars with 20 to 45° curvatures and 3 to 7 mm curve radius were chosen for this study. After working length determination, the teeth were divided into two groups (n=20). Root canals were prepared with RaCe in group 1 and NSK handpiece and precurved SS hand files in group 2 up to #30 with 2% taper in both groups. Radiographs were taken of teeth before and after instrumentation from buccolingual and mesiodistal directions. The images were superimposed using Adobe Photoshop CS3 software. Degree of straightening and amount of apical transportation at 0, 0.5, 1, 2, 3, 4 and 5 mm levels short of the working length were determined using digital subtraction radiography. The student’s t test was used to compare the degree of straightening and Mann Whitney test was applied to compare apical transportation (millimeters) between the two groups. Results: No significant difference was noted between the two groups on buccolingual or mesiodistal views in degree of straightening and apical transportation on buccolingual view (P>0.05). However, on mesiodistal view, NSK reciprocating handpiece caused greater apical transportation at 0. 0.5 and 1 mm levels (P<0.05). Conclusion: The RaCe system and precurved SS files in reciprocating handpiece were highly similar in terms of degree of straightening and apical transportation. Thus, engine-driven NSK reciprocating handpiece can be used as an efficient adjunct for root canal preparation.
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Affiliation(s)
- Fatemeh Mohammadian
- Department of Endodontics, Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran
| | | | - Fatemeh Dibaji
- Department of Endodontics, Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran
| | - Mona Sadegh
- Department of Endodontics, Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran
| | - Zahra Ghoncheh
- Department of Oral and Maxillofacial Radiology, Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran
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Costa EL, Sponchiado-Júnior EC, Garcia LFR, Marques AAF. Effect of large instrument use on shaping ability and debris extrusion of rotary and reciprocating systems. ACTA ACUST UNITED AC 2017; 9. [PMID: 28834333 DOI: 10.1111/jicd.12289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 06/20/2017] [Accepted: 06/22/2017] [Indexed: 11/28/2022]
Abstract
AIM The aim of the present study was to evaluate the effect of large instrument use on the shaping ability and apical debris extrusion of rotary and reciprocating systems in oval-shaped root canals. METHODS Forty-five mandibular premolars, with an 18-mm long, oval-shaped single canal, and apical diameter ranging from 300 to 350 μm, were separated into three groups (n=15), according to the system used: ProTaper Universal group, F5 (0.50/0.05); ProTaper Next (PTN group), X5 (0.50/0.06); and Reciproc (RC group), R50 (0.50/0.05). Cone-beam computed tomography was performed before and after preparation to analyze apical transportation (AT), centering ability (CA), and change in root canal diameter (CRCD). For evaluating apical debris extrusion, the roots were coupled to pre-weighed glass receptacles to collect the extruded debris during preparation. RESULTS All systems promoted AT and apical debris extrusion; the latter was higher for the PTN group (P<.05). No system presented perfect CA. The RC group demonstrated the largest CRCD (P<.05). CONCLUSIONS As consequences of their use, the large instruments promoted undesirable AT and debris extrusion, irrespective of the system used to perform root canal preparation. Moreover, no system was able to remain perfectly centralized within the root canal.
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Affiliation(s)
- Elielton L Costa
- School of Dentistry, Federal University of Amazonas, Manaus, Amazonas, Brazil
| | | | - Lucas F R Garcia
- Department of Dentistry, Federal University of Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - André A F Marques
- Superior School of Health Sciences, State University of Amazonas, Manaus, Amazonas, Brazil
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Naseri M, Paymanpour P, Kangarloo A, Haddadpur S, Dianat O, Ketabi MA. Influence of motion pattern on apical transportation and centering ability of WaveOne single-file technique in curved root canals. Dent Res J (Isfahan) 2016; 13:13-7. [PMID: 26962310 PMCID: PMC4770464 DOI: 10.4103/1735-3327.174690] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Background: The aim of this study was to evaluate apical transportation and centering ability of single-file instruments, WaveOne primary, with full rotation versus reciprocation movement using cone-beam computed tomography (CBCT) analysis in curved mesiobuccal (MB) root canal of human mandibular molars. Materials and Methods: Thirty MB canals of mandibular molars were randomly divided into two groups according to the instrument motion (n = 15): Group 1, reciprocation/WaveOne primary; Group 2, continuous rotation/WaveOne primary. After preparation, the amount of apical transportation and centering ability were assessed by evaluating pre- and post-instrumentation CBCT scans in three section (1, 3, and 5 mm from apical foramen). Statistical analysis of the data was performed using Mann-Whitney U-test and Friedman test (α = 0.05). Results: There was no statistically significant difference between two experimental groups in terms of apical transportation and centering ratio at 1, 3, and 5 mm from apical foramen (P > 0.05). Conclusion: Apical transportation and centering ability of WaveOne primary reciprocating instrument did not significantly differ between two motion patterns.
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Affiliation(s)
- Mandana Naseri
- Department of Endodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Payam Paymanpour
- Department of Endodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Kangarloo
- Department of Endodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sahar Haddadpur
- Department of Orthodontics, Dental School, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Omid Dianat
- Department of Endodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Ketabi
- Department of Endodontics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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10
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Soi S, Yadav S, Sharma S, Sharma M. In Vitro Comparison of Apically Extruded Debris during Root Canal Preparation of Mandibular Premolars with Manual and Rotary Instruments. J Dent Res Dent Clin Dent Prospects 2015; 9:131-7. [PMID: 26697144 PMCID: PMC4682008 DOI: 10.15171/joddd.2015.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 05/11/2015] [Indexed: 11/16/2022] Open
Abstract
Background and aims. During root canal
preparation, debris extruded beyond the apical foramen may result in
periapical inflammation and postoperative pain. To date no root canal
preparation method has been developed that extrudes no periapical
debris. The purpose of this study was to identify a system leading to
minimal extrusion of debris from the apical foramen. The study was
conducted to comparatively evaluate the amount of apical extrusion of
debris during root canal preparation using hand ProTaper and GT rotary
and RaCe rotary instruments using crown-down technique. Materials and methods.
Ninety freshly extracted human single-rooted mandibular premolars were
equally assigned to three groups (n=30). The root canals were
instrumented using hand ProTaper, GT rotary and RaCe rotary systems.
Debris and irrigant extruded from the apical foramen were collected into
vials. The mean weight of the remaining debris was calculated for each
group and subjected to statistical analysis. Results.
ANOVA was used to compare the mean dry weights of the debris extruded
in the three groups, followedby post hoc Tukey tests for multiple
comparisons the between groups. Highly significant differences were
found in the amount of debris extruded among all the groups
(P<0.001). The ProTaper group exhibited the highest mean debris
weight (0.8293±0.05433 mg) and the RaCe system exhibited the lowest mean
debris weight (0.1280±0.01606 mg). Conclusion. All
the systems tested resulted in apical extrusion of debris. However, the
hand ProTaper files extruded a significantly higher amount of debris
than GT and RaCe systems.
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Affiliation(s)
- Sonal Soi
- Reader, I.T.S Dental College, Hospital and Research Centre, Greater Noida, India
| | - Suman Yadav
- Professor, Department of Conservative Dentistry and Endodontics, Sri Guru Gobind Tricentenary Dental College, Research Center and Hospital, Gurgaon, India
| | - Sumeet Sharma
- Professor and Head of Department, Institute of Dental Studies and Technologies, Modinagar, India
| | - Mohit Sharma
- Reader, I.T.S Dental College, Hospital and Research Centre, Greater Noida, India
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Plotino G, Ahmed HMA, Grande NM, Cohen S, Bukiet F. Current Assessment of Reciprocation in Endodontic Preparation: A Comprehensive Review—Part II: Properties and Effectiveness. J Endod 2015; 41:1939-50. [DOI: 10.1016/j.joen.2015.08.018] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Tambe VH, Nagmode PS, Abraham S, Patait M, Lahoti PV, Jaju N. Comparison of canal transportation and centering ability of rotary protaper, one shape system and wave one system using cone beam computed tomography: An in vitro study. J Conserv Dent 2014; 17:561-5. [PMID: 25506145 PMCID: PMC4252931 DOI: 10.4103/0972-0707.144605] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 09/14/2014] [Accepted: 09/29/2014] [Indexed: 12/02/2022] Open
Abstract
Aim: The aim of the present study was to compare the canal transportation and centering ability of Rotary ProTaper, One Shape and Wave One systems using cone beam computed tomography (CBCT) in curved root canals to find better instrumentation technique for maintaining root canal geometry. Materials and Methods: Total 30 freshly extracted premolars having curved root canals with at least 10 degrees of curvature were divided into three groups of 10 teeth each. All teeth were scanned by CBCT to determine the root canal shape before instrumentation. In Group 1, the canals were prepared with Rotary ProTaper files, in Group 2 the canals were prepared with One Shape files and in Group 3 canals were prepared with Wave One files. After preparation, post-instrumentation scan was performed. Pre-instrumentation and post-instrumentation images were obtained at three levels, 3 mm apical, 3 mm coronal and 8 mm apical above the apical foramen were compared using CBCT software. Amount of transportation and centering ability were assessed. The three groups were statistically compared with analysis of variance and Tukey honestly significant. Results: All instruments maintained the original canal curvature with significant differences between the different files. Data suggested that Wave One files presented the best outcomes for both the variables evaluated. Wave One files caused lesser transportation and remained better centered in the canal than One Shape and Rotary ProTaper files. Conclusion: The canal preparation with Wave One files showed lesser transportation and better centering ability than One Shape and ProTaper.
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Affiliation(s)
- Varsha Harshal Tambe
- Department of Conservative Dentistry and Endodontics, SMBT Dental College and Hospital, Sangamner, Maharashtra, India
| | - Pradnya Sunil Nagmode
- Department of Conservative Dentistry and Endodontics, SMBT Dental College and Hospital, Sangamner, Maharashtra, India
| | - Sathish Abraham
- Department of Conservative Dentistry and Endodontics, SMBT Dental College and Hospital, Sangamner, Maharashtra, India
| | - Mahendra Patait
- Department of Oral Diagnosis and Oral Radiology, SMBT Dental College and Hospital, Sangamner, Maharashtra, India
| | - Pratik Vinod Lahoti
- Department of Conservative Dentistry and Endodontics, SMBT Dental College and Hospital, Sangamner, Maharashtra, India
| | - Neha Jaju
- Department of Conservative Dentistry and Endodontics, SMBT Dental College and Hospital, Sangamner, Maharashtra, India
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S-Shaped Canals: A Series of Cases Performed by Four Specialists around the World. Case Rep Dent 2014; 2014:359438. [PMID: 25143838 PMCID: PMC4124786 DOI: 10.1155/2014/359438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Revised: 06/21/2014] [Accepted: 06/21/2014] [Indexed: 11/22/2022] Open
Abstract
Recognition of anatomical variations is a real challenge for clinicians undertaking therapy regardless of the teeth that are to be treated. The extent of the curvature is one of the most important variables that could lead to instrument fracture. In clinical conditions, two curves can be present in the same root canal trajectory. This type of geometry is denoted as the “S” shape, and it is a challenging condition. This report describes a different clinical and educational scenario where four specialists around the world present different approaches for the treatment of root canals with double curvatures or S-shaped canals. Endodontic therapy is a very nuanced and challenging science and art. The clinical and teaching experience of the authors show different approaches that can be successfully employed to treat challenging teeth having roots with multiple curves. The necessity of precise knowledge of the root canal morphology and its variation is also underlined.
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In vitro comparison in a manikin model: increasing apical enlargement with K3 and K3XF rotary instruments. J Endod 2014; 40:1463-7. [PMID: 25146034 DOI: 10.1016/j.joen.2014.02.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 02/27/2014] [Accepted: 02/28/2014] [Indexed: 11/22/2022]
Abstract
INTRODUCTION The aim of the study was to compare the K3 and K3XF systems (SybronEndo, Glendora, CA) after 1 and 2 uses by evaluating apical transportation, working length loss, and working time in a manikin model. METHODS Mesial canals of 40 extracted first mandibular molars were instrumented. Radiographs taken after instrumentation with #25, #30, #35, and #40 files were superimposed on the preoperative image in both mesiodistal and buccolingual angulations. AutoCAD (Autodesk Inc, San Rafael, CA) was used to measure working length loss and apical transportation at 0, 0.5, and 1 mm from the working length (WL). The working time was measured. Group comparison was analyzed using post hoc Tukey honestly significant difference tests (P < .05). RESULTS No significant differences were found in apical transportation, working length loss between K3 and K3XF systems, or between the number of uses. Significant differences were found when canal enlargement was performed to a #35-40 (P < .05). K3 instrumentation performed significantly faster (29.6 ± 15.4) than with the K3XF system (40.2 ± 17.7) (P < .05). No differences were observed in working time when comparing the number of uses. CONCLUSIONS K3 and R-phase K3XF rotary systems shaped curved root canals safely with minimal apical transportation, even up to a 40/04 file.
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15
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Cyclic fatigue of instruments for endodontic glide path. Odontology 2013; 103:56-60. [DOI: 10.1007/s10266-013-0138-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 10/02/2013] [Indexed: 11/26/2022]
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Nagaveni SA, Balakoti KR, Smita K, Ratnakar P, Satish SV, Aravind T. Quantitative evaluation of apical extrusion of debris and irrigants using four rotary instrumentation systems: an in vitro study. J Contemp Dent Pract 2013; 14:1065-9. [PMID: 24858752 DOI: 10.5005/jp-journals-10024-1452] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
CLINICAL SIGNIFICANCE The apical extrusion of infected debris may have the potential to disrupt the balance between microbial aggression and host defense, resulting in incidents of acute inflammation. During preparation, irrigants and debris, such as bacteria, dentin filings and necrotic tissue may be extruded into the periradicular region leading to periapical inflammation and postoperative flare ups. Using an instrumentation technique that minimizes apical extrusion would be beneficial to both the practitioner and patient. The purpose of the study was to evaluate the weight of debris and volume of irrigant extruded apically from extracted teeth in vitro after endodontic instrumentation using four different rotary root canal instrumentation systems. MATERIALS AND METHODS Four groups of each 20 extracted mandibular premolars were instrumented using one of the four systems: ProTaper Universal (Dentsply Maillefer, Ballaigues, Switzerland)), Hero-shaper (MicroMega, Besancon, France), RaCe (FKG Dentaire, La-Chaux-de-Fonds, Switzerland) and K3 (SybronEndo, West Collins, CA). Debris and irrigant extruded from the apical foramen during instrumentation were collected in preweighed test tubes. Volume of irrigant extruded was noted. The containers were stored in incubator at 70° for two days to evaporate the moisture. Weight of dry debris was noted. STATISTICAL ANALYSIS Data was analyzed using Kruskall-Wallis and Mann-Whitney U test at a significance of 0.001. RESULTS The results indicated that all of the instrumentation systems tested caused measurable apical extrusion of debris and irrigants. Higher extrusion was observed with Protaper system which was statistically significant with Hero-Shaper, RaCe and K3 systems. There were no statistical differences between Hero-shaper, K3 and RaCe systems (p < 0.05). CONCLUSION All instrumentation techniques apically extruded debris and irrigant. However, Hero-shaper, K3 and RaCe systems produced less extruded debris and irrigant than the Protaper system.
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Affiliation(s)
- S Aspalli Nagaveni
- Assistant Professor, Department of Conservative Dentistry and Endodontics, AME's Dental College, Hospital and Research Centre, Bijangere Road, Raichur-584103, Karnataka, India, e-mail:
| | - K Reddy Balakoti
- Professor and Head, Department of Conservative Dentistry and Endodontics, St Joseph Dental College and Hospital, Eluru, Andhra Pradesh, India
| | - Karan Smita
- Reader, Department of Periodontics, Adesh Institute of Dental Sciences Bathinda, Punjab, India
| | - P Ratnakar
- Reader, Department of Conservative Dentistry and Endodontics S. Nijalingappa Institute of Dental Sciences and Research Centre Gulbarga, Karnataka, India
| | - S V Satish
- Professor, Department of Conservative Dentistry and Endodontics Navodaya Dental College, Raichur, Karnataka, India
| | - T Aravind
- Professor, Department of Periodontics, Rama Dental College, Kanpur Uttar Pradesh, India
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Apical root canal transportation and remaining dentin thickness associated with ProTaper Universal with and without PathFile. J Endod 2013; 40:688-93. [PMID: 24767565 DOI: 10.1016/j.joen.2013.09.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 08/31/2013] [Accepted: 09/03/2013] [Indexed: 11/20/2022]
Abstract
INTRODUCTION This study aimed to compare, using digital subtraction radiography, apical transportation in mesiobuccal root canals of extracted human maxillary molars instrumented with ProTaper Universal F3 and F4 files (Dentsply Maillefer, Ballaigues, Switzerland) with and without the prior creation of glide paths using the PathFile system and to compare, using cone-beam computed tomographic imaging, remaining dentin thickness (RDT) after complete preparation. METHODS Forty mesiobuccal roots with curvatures of 20°-35° were used. In group A, glide paths were created with PathFile #1, #2, and #3 to the working length; in group B, no glide paths were used. All canals were instrumented up to F4 to the working length. Digital subtraction radiographic images were obtained in buccolingual and mesiodistal directions. Apical transportation associated with F3 or F4 was calculated based on the difference between the tip of the first and the last instrument analyzed in each group. RDT was calculated based on cone-beam computed tomographic images. RESULTS Apical transportation was higher after F4 regardless of the use of the PathFile system. No statistically significant differences between groups A and B were observed in apical transportation after instrumentation with F3 or F4 (P > .05). Group A showed greater RDT values at 2 (buccal and mesial walls, P < .05) and 3 mm (buccal and distal walls, P < .05) from the apex but not at 1 mm. CONCLUSIONS The use of the PathFile system before root canal preparation with ProTaper Universal F3 and F4 did not influence apical transportation but was associated with greater RDTs at 2 and 3 mm from the apex.
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González Sánchez JA, Duran-Sindreu F, de Noé S, Mercadé M, Roig M. Centring ability and apical transportation after overinstrumentation with ProTaper Universal and ProFile Vortex instruments. Int Endod J 2012; 45:542-51. [DOI: 10.1111/j.1365-2591.2011.02008.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Microscopic computerized tomographic evaluation of root canal transportation prepared with twisted or ground nickel-titanium rotary instruments. ACTA ACUST UNITED AC 2011; 112:e143-8. [DOI: 10.1016/j.tripleo.2011.06.029] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2011] [Revised: 06/18/2011] [Accepted: 06/21/2011] [Indexed: 11/21/2022]
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20
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Tasdemir T, Er K, Çelik D, Aydemir H. An in vitro comparison of apically extruded debris using three rotary nickel-titanium instruments. J Dent Sci 2010. [DOI: 10.1016/s1991-7902(10)60017-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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21
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Sanfelice CM, da Costa FB, Reis Só MV, Vier-Pelisser F, Souza Bier CA, Grecca FS. Effects of Four Instruments on Coronal Pre-enlargement by Using Cone Beam Computed Tomography. J Endod 2010; 36:858-61. [DOI: 10.1016/j.joen.2009.12.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Revised: 12/18/2009] [Accepted: 12/18/2009] [Indexed: 11/25/2022]
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Oliveira CAP, Meurer MI, Pascoalato C, Silva SRC. Cone-beam computed tomography analysis of the apical third of curved roots after mechanical preparation with different automated systems. Braz Dent J 2009; 20:376-81. [DOI: 10.1590/s0103-64402009000500004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2009] [Accepted: 11/19/2009] [Indexed: 11/22/2022] Open
Abstract
The present study evaluated by cone-beam computed tomography (CBCT) the apical canal transportation and centralizing ability of different automated systems after root canal preparation. The mesiobuccal canals of maxillary first molars (n=10 per group) were prepared with: GI - reciprocating system with K-Flexofile; GII - reciprocating system with NiTiFlex files; GIII - rotary system with K3 instruments; GIV - rotary system with RaCe instruments. CBCT scans were taken before and after biomechanical preparation up to a #40.02 diameter. Canal transportation was determined by measuring the smallest distance between the inner canal walls and the mesial and distal sides of the root. The centralization ability corresponded to the difference between the measurements from transportation evaluation, using the linear voxel to voxel method of analysis. The mean transportation was 0.06 ± 0.14 mm, with a tendency to deviate to the mesial side of the root (n=22), with no statistically significant difference among the groups (p=0.4153). The mean centralization index was 0.15 ± 0.65 also without statistically significant difference among the groups (p=0.0881). It may be concluded that apical canal transportation and centralization ability were not influenced by the type of mechanical movement and instruments used.
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