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Bürklein S, Arias A. Effectiveness of root canal instrumentation for the treatment of apical periodontitis: A systematic review and meta-analysis. Int Endod J 2023; 56 Suppl 3:395-421. [PMID: 35670625 DOI: 10.1111/iej.13782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND The development of endodontic instruments has rapidly advanced, but their impact on endodontic outcome parameters remains unclear. OBJECTIVES This systematic review aimed to answer the following PICOT questions: In patients with apical periodontitis (P) what is the effectiveness of root canal instrumentation ([Q1] performed with contemporary techniques [I] in comparison with 'traditional' techniques [C]] and ([Q2] performed with contemporary engine-driven NiTi instruments [I] compared with other types of contemporary engine-driven NiTi instruments [with different design and/or technology] [C]) in terms of clinical and patient-related outcomes (O)? METHODS After PROSPERO protocol registration, a literature search was conducted using Clarivate Analytics' Web of Science, Scopus, PubMed and Cochrane Central Register of Controlled Trials. Grey literature and major journal contents were examined. Two independent reviewers performed the study selection, data extraction and appraisal of included studies. A quantitative meta-analysis was considered, and statistical heterogeneity and overall quality of evidence were assessed. RESULTS Nine studies were identified showing substantial methodological differences. Five studies addressed PICOT 1 and three PICOT 2, whereas one study aimed both. A random-effects meta-analysis model was considered for the outcome 'radiographic evidence of normal periodontal ligament space or reduction of apical lesion size' (PICOT 1) based on three studies with 332 evaluable participants and showed that contemporary instrumentation was associated with a more favourable outcome (p = .005) compared with root canal preparation with stainless steel instruments (odds ratio = 2.07 [95%-confidence interval = 1.25-3.44]) with no evidence of statistical heterogeneity (I2 = 0%) but low quality of evidence. DISCUSSION Albeit a few studies fulfilled eligible criteria, no study had a low risk of bias. Compelling evidence indicating significantly different outcome rates using different endodontic instruments when treating teeth with apical periodontitis is lacking. CONCLUSIONS In terms of healing, the results of the meta-analysis determined the higher effectiveness of root canal instrumentation performed with contemporary techniques in comparison with conventional stainless steel instruments in patients with apical periodontitis followed for a minimum of 1 year with low quality of evidence. No differences could be demonstrated between preparations with traditional stainless steel and contemporary NiTi instruments for other clinical and patient-related outcomes. REGISTRATION PROSPERO (CRD42021274642).
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Affiliation(s)
| | - Ana Arias
- School of Dentistry, Complutense University, Madrid, Spain
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Ünlü O, Güneç HG, Haznedaroğlu F. Investigation of the efficacy of different Ni-Ti systems on acrylic blocks for correcting ledge formation. BMC Oral Health 2023; 23:174. [PMID: 36966308 PMCID: PMC10040126 DOI: 10.1186/s12903-023-02865-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 03/07/2023] [Indexed: 03/27/2023] Open
Abstract
BACKGROUND The aim of this study was to compare the efficacy of K-type stainless steel hand instruments (Mani Inc. ), Fanta AF™ Ledge Correction (LC) (Fanta Dental), and Hyflex EDM (Coltene-Whaledent) for ledge correction, canal transport, centric ability, and shaping (preparation) time after an artificial ledge has been bypassed manually in highly curved canals using acrylic blocks. METHODS Forty-two resin blocks, each with a radius of 5 mm (Endo Trainer Block, VDW) and an apical inclination of 55°, were used. Under stereomicroscope magnification, standard artificial ledges were created on acrylic blocks, and attempts were then made to eliminate them using hand instruments, FantaAF™ LC, and Hyflex EDM. Before and after images were obtained using a stereomicroscope and compared using Photoshop. RESULTS Fanta AF™ LC and Hyflex EDM were found to be more effective for correcting ledges than hand instruments. The use of hand instruments resulted in the greatest transportation away from the canal curvature in the apical area. The canal shaping was completed in the shortest amount of time using Fanta AF™ LC, followed by HyFlex EDM and then the hand instruments. CONCLUSION In terms of centric ability, the order from best to worst is as follows: Fanta AF™ LC, Hyflex EDM, and hand instruments. After the ledge was manually bypassed with hand instruments in the root canals, Hyflex EDM and Fanta AF™ LC were found to be more effective than hand instruments in reshaping the previously unreachable region between the ledge and the foramen apical.
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Affiliation(s)
- Osman Ünlü
- Faculty of Dentistry, Department of Endodontics, Istanbul University, Prof. Dr. Cavit Orhan Tütengil Sk. 4/6, 34116, İstanbul, Turkey
| | - Hüseyin Gürkan Güneç
- Hamidiye Dental Faculty, Department of Endodontics, University of Health Sciences, Tıbbiye Cd, 34668, Selimiye, Üsküdar, İstanbul, Turkey.
| | - Faruk Haznedaroğlu
- Faculty of Dentistry, Department of Endodontics, Istanbul University, Prof. Dr. Cavit Orhan Tütengil Sk. 4/6, 34116, İstanbul, Turkey
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Tang Y, Wu Y, Pei F, Liu C, Qiu Y, Yang T, Gu Y. A micro-computed tomographic analysis of the root canal systems in the permanent mandibular incisors in a Chinese population. BMC Oral Health 2023; 23:129. [PMID: 36890470 PMCID: PMC9996864 DOI: 10.1186/s12903-023-02830-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 02/22/2023] [Indexed: 03/10/2023] Open
Abstract
BACKGROUND Comprehensive understanding of the root canal system complexity is critical important for successful root canal therapy. A double root canal system may be present in permanent mandibular incisors with a variable incidence in different ethnic populations. Ignorance or improper management of this canal variation can lead to treatment failure. This in vitro study aimed to identify the anatomic features of root canal systems in the mandibular incisors in a Chinese population by using micro-CT. METHODS A total of 106 permanent mandibular incisors (53 central incisors and 53 lateral incisors) were collected from a native Chinese population. The teeth were scanned by a micro-CT scanner and then reconstructed three-dimensionally. The canal configurations were detected by Vertucci's classification, and the number and location of the accessory canals were also identified. The long (D) and short diameters (d) of the main and accessory canals were measured and D/d ratio was calculated at different root levels (cemento-enamel junction [CEJ] level, mid-root level and 1, 2, 3 and 4 mm from the apex). The root canal curvatures in the double-canaled mandibular incisors were measured at the proximal view by using modified Schneider's method. Chi-square test or Fisher's exact test was used for comparison of occurrence rates. Comparison of means from multiple groups was performed by using one-way ANOVA and LSD post-hoc test. RESULTS In regard to the occurrence of double root canals, gender difference was neither detected in the mandibular central (16.0% [male] vs 14.3% [female]; p = 0.862), nor in the mandibular lateral incisors (26.9% [male] vs 33.3% [female]; p = 0.611). Age group difference was also not detected in the mandibular central (p = 0.717) and lateral incisors (p = 0.521). The incidence of double root canals was 15.1% (8/53) in the central incisors, and 30.2% (16/53) in the lateral incisors, but the difference did not reach statistical significance (p = 0.063). The most frequent non-single canal type was the type III (1-2-1) (18.9% [20/106]), and the other types identified included 1 case of type II (2-1) and 3 cases of type V (1-2). The incidence of accessory canals was 17.9% (19/106), with a mean level of 1.92 ± 1.19 mm from the apex. The frequency of long-oval (2 ≤ D/d < 4) and flattened canals (D/d ≥ 4), as well as the mean value of D, d and D/d ratio increased from the apical 1 mm to the apical 4 mm level (the D/d ratio increased from 1.9 to 2.9 for the single canals, from 1.4 to 3.3 for the buccal canals and from 1.2 to 2.3 for the lingual canals), and the D/d ratio reached the peak at the mid-root level. Double curvatures were detected in 33.3% (8/24) of the buccal canals and 37.5% (9/24) of the lingual canals, and the difference has no statistical significance (p = 0.063). The degrees of the primary curvatures were 21.5 ± 7.1 degrees for the buccal and 30.1 ± 9.2 degrees for the lingual canals, and the degrees of secondary curvatures were 27.0 ± 11.4 degrees for the buccal and 30.5 ± 12.5 degrees for the lingual canals in the double curvatures. The degrees of the single curvatures were 14.2 ± 6.3 degrees for the buccal and 15.6 ± 6.0 degrees for the lingual canals. Significant difference was detected among above 6 groups of canal curvatures (p = 0.000), and severe curvatures (≥ 20 degrees) were more frequently detected in the double curved canals. CONCLUSIONS Double-canaled mandibular incisors were not uncommon in the Chinese population, and type 1-2-1 was the most frequent non-single canal type. Gender and age did not significantly impact the occurrence of a second canal in mandibular incisors. Long-oval and flattened canals were very common at different root levels and their incidence increased from apex to the mid-root level. Severe curvatures were frequently detected in the double canal systems, especially in those canals with double curvatures.
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Affiliation(s)
- Ying Tang
- Department of Central Laboratory and Pathology, Ninth People's Hospital of Suzhou, Soochow University, Suzhou, China
| | - Yihan Wu
- Department of Central Laboratory and Dentistry, Ninth People's Hospital of Suzhou, Soochow University, Ludang Road 2666#, Wujiang Dist., 215200, Suzhou, China
| | - Fan Pei
- Department of Central Laboratory and Dentistry, Ninth People's Hospital of Suzhou, Soochow University, Ludang Road 2666#, Wujiang Dist., 215200, Suzhou, China
| | - Chao Liu
- Department of Central Laboratory and Pathology, Ninth People's Hospital of Suzhou, Soochow University, Suzhou, China
| | - Yinfeng Qiu
- Department of Central Laboratory and Dentistry, Ninth People's Hospital of Suzhou, Soochow University, Ludang Road 2666#, Wujiang Dist., 215200, Suzhou, China
| | - Tao Yang
- Department of Central Laboratory and Dentistry, Ninth People's Hospital of Suzhou, Soochow University, Ludang Road 2666#, Wujiang Dist., 215200, Suzhou, China
| | - Yongchun Gu
- Department of Central Laboratory and Pathology, Ninth People's Hospital of Suzhou, Soochow University, Suzhou, China. .,Department of Central Laboratory and Dentistry, Ninth People's Hospital of Suzhou, Soochow University, Ludang Road 2666#, Wujiang Dist., 215200, Suzhou, China.
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Torsional Fracture Resistance of Niti Rotary Glide Path Files under Flexural Stress. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12126214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
This study aimed to evaluate the effects of flexural stress on the torsional fracture resistance of NiTi glide path files. PathFile #16/02, RaCe #15/04, RaCe Evo #15/04, HyFlex EDM #15/03, TruNatomy Glider #17/02, and V Taper 2H #17/04 were examined by scanning electron microscopy (SEM) (n = 3/brand) and subjected to differential scanning calorimetry (n = 2/brand). Torsional fracture resistance testing was performed in straight (ISO 3630-1) and flexural modes (n = 15/brand/mode). Flexural mode testing involved instruments rotating within a stainless-steel artificial double-curved canal. Ultimate strength and distortion angle until failure were recorded, and fractured instruments were examined by SEM. Statistical analyses involved independent sample t-test and one-way analysis of variance with Games–Howell pots hoc test. Austenitic transformation- finishing temperatures of heat-treated files were above body temperature. For RaCe Evo, HyFlex EDM, TruNatomy Glider, and V Taper 2H, the flexural mode resulted in a significantly higher distortion angle compared to the straight mode (p < 0.05). The maximum torque of RaCe Evo, HyFlex EDM increased with the flexural stress (p < 0.05). V taper 2H showed the highest distortion angle and ultimate strength. SEM showed typical patterns of torsional fracture for all tested files. The flexural stress positively affected distortion angle of heat-treated NiTi glide path files.
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Chai G, Guo Z, Wang Y, Li Y, Wang J, Zhang L, Sun Y, Yang C, Xia D, Shi T. Effect of flushing temperature on preparation ability of rotary nickel-titanium files. J Appl Biomater Funct Mater 2021; 19:22808000211014724. [PMID: 34210203 DOI: 10.1177/22808000211014724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
PURPOSE The effect of flushing at different temperatures on the preparation ability of rotary nickel-titanium files was investigated to provide guideline for clinical application. METHODS Sixty ProTaper Universal F1 rotary nickel-titanium files were randomly divided into three groups treated by flushing at 6°C, 23°C, and 40°C. Root canal preparation was conducted by step-by-step method on standardized nickel-titanium instrument fracture models. During preparation, the thrust force was set as 10 N, and water was continuously flushed. The motor speed was 350 rpm (rounds per minute), and the torque was 3.0 N cm. When the set torque was reached, the motor automatically rotated in the reverse direction and was pulled out. RESULTS Root canal preparation was performed using ProTaper Universal F1 rotary nickel-titanium files treated by flushing. The numbers of rotations before the device was fracture were 429.33 ± 214.68, 821.92 ± 410.43, and 1304.92 ± 297.81, respectively. When each root canal was completed, the numbers of instrument rotations were 272.15 ± 88.30, 188.85 ± 34.36, and 163.41 ± 16.18, respectively. Rank sum test and analysis of variance were performed by IBM SPSS Statistics v21.0 software, and both of them were p < 0.01, indicating that the number of cycles to failure (NCF) and the number of instrument rotations for each root tube were statistically different at the three temperatures. CONCLUSIONS The self-made resin-simulated curved root canal can replace the real root canal to complete the root canal preparation experiment. The group of nickel-titanium files treated by flushing at 23°C can prepare more root canals and prolong the life of nickel-titanium files than at 6°C. When flushing was done at 40°C, the number of root canals prepared by nickel-titanium files was the highest, and it was not easy to damage the instrument, but lateral perforation occurred easily during root canal preparation.
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Affiliation(s)
- Guangquan Chai
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Ziyan Guo
- Department of Stomatology, The First Affiliated Hospital of The Second Military Medical University, Shanghai, China
| | - Yingdi Wang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yanfeng Li
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Jing Wang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Lu Zhang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yidan Sun
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Chunhao Yang
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Dong Xia
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Tingting Shi
- Department of Stomatology, The Fourth Medical Center, Chinese PLA General Hospital, Beijing, China
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Root Canal Transportation after Root Canal Preparation with ProTaper Next, WaveOne Gold, and Twisted Files. J Clin Med 2020; 9:jcm9113661. [PMID: 33202555 PMCID: PMC7696375 DOI: 10.3390/jcm9113661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/10/2020] [Accepted: 11/12/2020] [Indexed: 11/16/2022] Open
Abstract
Background: Root canal preparation during endodontic treatment may be associated with various complications, including a change in the original pathway of the root canal lumen. The aim of our study was to determine whether files of similar sizes that use various movement kinematics (rotary, reciprocal, adaptive motion) cause root canal transportation, and whether the differences between such systems are statistically significant. Methods: The degree of root canal transportation (DT) was calculated with the use of computed tomography scans for 3 groups of teeth (for each group: n = 20) in which the root canals were prepared using either rotary (ProTaper Next—PTN), reciprocal (WaveOne Gold—WOG), or adaptive movement (Twisted Files—TF) instruments. Results: For rotary ProTaper Next instruments, the mean value of the DT index was 0.0795 (SD = 0.0179) for 3 mm from the apex, 0.09 (SD = 0.0262) for 6 mm from the apex, and 0.106 (SD = 0.0221) for 9 mm from the apex. For reciprocal WaveOne Gold Primary instruments, the mean value of the DT index was 0.0355 (SD = 0.015) for 3 mm from the apex, 0.061 (SD = 0.02) for 6 mm from the apex, and 0.08 (SD = 0.25) for 9 mm from the apex. For Twisted Files, the mean value of the DT index was 0.05 (SD = 0.03) for 3 mm from the apex, 0.092 (SD = 0.17) for 6 mm from the apex, and 0.08 (SD = 0.02) for 9 mm from the apex. Conclusions: The use of PTN, WOG, and TF files resulted in root canal transportation to a different degree. The use of rotary PTN files produced the most transported preparation, whereas the use of WOG files produced the conservative root canal preparation that allowed the retention of the original shape of the root canal.
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Mecholsky JJ, Barrett AA, Jones CT, Pace KM, Nair UP. Fractographic analysis of separated endodontic file designs. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:104. [PMID: 33140130 DOI: 10.1007/s10856-020-06432-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 09/24/2020] [Indexed: 06/11/2023]
Abstract
Endodontic rotary files are cutting instruments used to perform root canal procedures within a tooth interior. Focusing on quantitative fractographic analysis increases necessary, clinical performance understanding of file separation failure. This research employed controlled, dynamic testing to failure of commercial rotary files, analyzing the fractographic, forensic characteristics in relation to Weibull reliability determination, considering: (1) design analysis; (2) stress concentrations; (3) times to failure; (4) number of cycles to failure (NCF). Ex vivo testing included three file designs, each having constant tip size (0.035 mm), taper (0.06 mm/mm), and length (25 mm). Files were individually tested using an electric, torque-controlled handpiece, rotating within a standardized, simulated canal until fracture separation occurred. Fractographic analysis, including critical measurements, was conducted using the scanning electron microscope (SEM) (PhenomProX, PhenomWorld, NL). Weibull statistical analysis established reliability factors per design group. Fractographic analysis identified separation fractures, processing inclusions, flexural-fatigue striations, and stress concentrations at flute pitches. Calculated NCF median values (1277-EE; 899-VB; 713-PI) demonstrated significant statistical differences among groups (p < 0.001). Separated apical fragments yielded statistically significant differences (p ≤ 0.05) for varying file design groups. Weibull moduli among groups were statistically equivalent. Fractographic analysis exposed a presence of multiple failure factors in addition to defect distribution, governing cyclic fatigue failure originating at stress concentration points irrespective of file design. Fractographic analysis indicated that a change in file design, specifically at the working edges, in addition to improved surface finish, has the potential of reducing failures by lowering points of stress concentration and reducing fracture initiating surface cracks.
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Affiliation(s)
- J J Mecholsky
- Department of Materials Science & Engineering, Center for Dental Biomaterials, College of Engineering, University of Florida, Gainesville, FL, 32611-6400, USA.
- Center for Dental Biomaterials, Department of Materials Science & Engineering, College of Engineering, University of Florida, Gainesville, FL, 32611-6400, USA.
| | - A A Barrett
- Center for Dental Biomaterials, Department of Materials Science & Engineering, College of Engineering, University of Florida, Gainesville, FL, 32611-6400, USA
| | - C T Jones
- Department of Endodontics, College of Dentistry, University of Florida, Gainesville, FL, 32611-6400, USA
- Practice Limited to Endodontics, Melbourne, FL, USA
| | - K M Pace
- Department of Materials Science & Engineering, College of Engineering, University of Florida, Gainesville, FL, 32611-6400, USA
- Alight Solutions, Dallas, TX, USA
| | - U P Nair
- Practice Limited to Endodontics, Dallas, TX, USA
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Daou C, El Hachem R, Naaman A, Zogheib C, El Osta N, Khalil I. Effect of 2 Heat-treated Nickel-Titanium Files on Enlargement and Deformation of the Apical Foramen in Curved Canals: A Scanning Electronic Microscopic Study. J Endod 2020; 46:1478-1484. [PMID: 32710894 DOI: 10.1016/j.joen.2020.07.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 07/03/2020] [Accepted: 07/13/2020] [Indexed: 12/18/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate under scanning electronic microscopy the enlargement and deformation of the apical foramen of curved mesiobuccal roots with both reciprocating and rotary single-file systems made of a newly heat-treated alloy through the use of Reciproc Blue (REC Blue; VDW, Munich, Germany) and XP-endo Shaper (XPS; FKG Dentaire, La Chaux-de-Fonds, Switzerland). METHODS Forty mesiobuccal roots of mandibular and maxillary molars presenting a curvature ranging from 20°-40° were used in this study. The apical foramens were initially scanned with a scanning electronic microscope under 200× magnification. Roots were divided into 2 groups (n = 20): the REC Blue group instrumented with the REC Blue system and the XPS group instrumented with the XPS system. Both groups were instrumented at the foramen. The apical foramens were scanned after root canal preparation. The area, circularity, and ratio of the Feret diameters were calculated from each image. The Kolmogorov-Smirnov, Mann-Whitney, and Wilcoxon tests were used for statistical analysis (P ≤ .05). RESULTS The area of the foramen increased significantly after canal shaping with REC Blue and XPS. The variation of the area was significantly greater with XPS. However, there were no significant differences in circularity and the ratio of the Feret diameters with both instruments. CONCLUSIONS No transportation was found when using REC Blue and XPS. The newly heat-treated nickel-titanium alloy did not promote deformation of the apical foramen in curved canals.
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Affiliation(s)
- Carla Daou
- Department of Endodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
| | - Roula El Hachem
- Department of Endodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon.
| | - Alfred Naaman
- Department of Endodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
| | - Carla Zogheib
- Department of Endodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
| | - Nada El Osta
- Department of Prosthodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon; Centre de Recherche en Odontologie Clinique, Université Clermont Auvergne, Clermont-Ferrand, France; Laboratoire de Recherche Crâniofaciale, Unité de Santé Orale, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
| | - Issam Khalil
- Department of Endodontics, Faculty of Dental Medicine, Saint Joseph University of Beirut, Beirut, Lebanon
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Mahmoodi B, Azaripour A, Sagheb K, Sagheb K, Willershausen B, Weusmann J. Undergraduate Students' Acceptance of a Reciprocating One-File System for Endodontic Treatment. Eur J Dent 2020; 14:393-396. [PMID: 32438431 PMCID: PMC7440951 DOI: 10.1055/s-0040-1710142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
OBJECTIVES Reciprocating endodontic one-file systems are a comparatively new method for root canal shaping. Even though the mechanical properties are comparable to modern rotating mechanical systems, data about subjective assessment and application quality are scarce. This study evaluates the reciprocating one-file system in undergraduate education. MATERIALS AND METHODS A total of 42 undergraduate students without experience regarding reciprocating file systems filled in a questionnaire in four different points in time (t 1-t 4) anonymously. The questionnaire was based on a numerical rating scale ranging from 0 to 10. STATISTICAL ANALYSIS A least significant difference post-hoc analysis comparing the group average values was performed. The adjusted level of significance was p < 0.004 after Bonferroni correction. RESULTS All rating scores increased after the first theoretical instruction. After the first practical training in artificial root canals in resin blocks and extracted teeth (t 2), the estimation of "time efficiency" (p = 0.002), "handling" (p < 0.001), and "overall impression" (p < 0.001) improved significantly. The "overall impression" remained constant and showed no significant changes after the first practical training. CONCLUSIONS Reciprocating systems seem to show a good acceptance among first time users. Initial concerns about "work safety" decrease during every step of the educational process. Reciprocating one-file systems are a safe and well-accepted method in undergraduate teaching.
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Affiliation(s)
- Benjamin Mahmoodi
- Department of Periodontology and Operative Dentistry, Universitätsmedizin Mainz, Johannes-Gutenberg University, Mainz, Germany
| | - Adriano Azaripour
- Department of Periodontology and Operative Dentistry, Universitätsmedizin Mainz, Johannes-Gutenberg University, Mainz, Germany
| | - Kawe Sagheb
- Department of Prosthodontics, Universitätsmedizin Mainz, Johannes-Gutenberg University, Mainz, Germany
| | - Keyvan Sagheb
- Department of Dentomaxillofacial Surgery, Universitätsmedizin Mainz, Johannes-Gutenberg University, Mainz, Germany
| | - Brita Willershausen
- Department of Periodontology and Operative Dentistry, Universitätsmedizin Mainz, Johannes-Gutenberg University, Mainz, Germany
| | - Jens Weusmann
- Department of Periodontology and Operative Dentistry, Universitätsmedizin Mainz, Johannes-Gutenberg University, Mainz, Germany
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Canal transportation caused by one single-file and two multiple-file rotary systems: A comparative study using cone-beam computed tomography. GIORNALE ITALIANO DI ENDODONZIA 2018. [DOI: 10.1016/j.gien.2018.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Assessment of Different Root Canal Preparation Techniques with Rotary Nickel-Titanium Instruments by Novice Students. Dent J (Basel) 2018; 6:dj6030046. [PMID: 30181430 PMCID: PMC6162720 DOI: 10.3390/dj6030046] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 08/13/2018] [Accepted: 08/31/2018] [Indexed: 11/16/2022] Open
Abstract
This study investigated which preparation strategy for root canals leads to the best technical preparation quality, and moreover, which is perceived to be performed best by novice students. Sixty-four students were recruited to prepare one simulated root canal with each of the following: FlexMaster files (F), Mtwo files (M), and Reciproc files (R). After preparation, the students assessed the different instrument systems through a questionnaire. The technical quality of the root canal preparations was evaluated by the centering ratio of the preparation. A total of 186 prepared root canals were submitted for evaluation. With R, significantly better centered preparations were achieved when compared to M and F (p < 0.001). The students evaluated R faster than M and F, and evaluated F significantly (p < 0.05) slower than R and M. M was rated as the easiest system to learn and to handle, as well as the best at reaching the working length; therefore, it was evaluated as the overall favorite of the students. A difference was found between the students' perceptions and their achieved technical quality of root canal preparations.
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Yammine S, Jabbour E, Diemer F, Majzoub Z. Canal Straightening Following Overinstrumentation with Three Nickel-Titanium Rotary Instruments. J Int Soc Prev Community Dent 2018; 8:245-251. [PMID: 29911063 PMCID: PMC5985682 DOI: 10.4103/jispcd.jispcd_18_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 01/30/2018] [Indexed: 12/22/2022] Open
Abstract
AIM The aim of the present in vitro study to compare canal straightening following shaping of curved canals with three types of new generation nickel-titanium (NiTi) rotary instruments-ProTaper Next (PTN)®, BT RaCe (BTR)®, and WaveOne Gold (WOG)®- and three different levels of protrusion beyond the major apical foramen. MATERIALS AND METHODS Forty-five extracted human maxillary and mandibular molars with at least one curved canal were distributed in three comparable groups of 15 canals each. The canals were instrumented to the major foramen and then overinstrumented with the final file 0.5 mm, 1 mm, and 1.5 mm beyond the foramen using PTN (Group PTN = 15), BTR (Group BTR = 15), and WOG (Group WOG = 15). Standardized pre- and post-instrumentation radiographs of the root canal were obtained for all groups using digital intraoral radiographs coupled with software. Differences in the degree of curvature were regarded as straightening and canal curvature was evaluated based on Schneider technique using the AmScope software for measurements and compared between groups and levels of instrumentation applying Mixed-model ANOVA. Significance was set at 0.05. RESULTS Canal curvature tended to gradually straighten out as the level of instrumentation increased in all three groups without statistically significant difference among the groups (P = 0.826). CONCLUSION Overinstrumentation in curved canals resulted in straightening of the canal curvature.
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Affiliation(s)
- Salwa Yammine
- Department of Endodontics, Faculty of Dental Medicine, Lebanese University, Hadath, Beirut, Lebanon
| | - Edgard Jabbour
- Department of Endodontics, Faculty of Dental Medicine, Lebanese University, Hadath, Beirut, Lebanon
| | - Franck Diemer
- Université Paul Sabatier, Institut Clément Ader, CHU de Toulouse, France
| | - Zeina Majzoub
- Department of Periodontology, Faculty of Dental Medicine, Lebanese University, Hadath, Beirut, Lebanon
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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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Nevares G, de Albuquerque DS, Freire LG, Romeiro K, Fogel HM, Dos Santos M, Cunha RS. Efficacy of ProTaper NEXT Compared with Reciproc in Removing Obturation Material from Severely Curved Root Canals: A Micro-Computed Tomography Study. J Endod 2017; 42:803-8. [PMID: 27117757 DOI: 10.1016/j.joen.2016.02.010] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2015] [Revised: 02/22/2016] [Accepted: 02/22/2016] [Indexed: 10/21/2022]
Abstract
INTRODUCTION The aim of this study was to compare the remaining root canal obturation, volume of dentin removed, and apical transportation after retreatment of severely curved root canals by using Reciproc (REC) or ProTaper NEXT (PTN) systems. METHODS Twenty-eight mesial canals of mandibular molars were instrumented and then obturated with gutta-percha and sealer and allocated into 2 balanced groups (n = 14), the REC group (R25 file) and the PTN group (X3 and X2 files). Micro-computed tomography analysis was performed to assess the percentage of residual obturation material, the amount of dentin removed, and apical transportation. The effective time for the removal of obturation and procedural errors were recorded. RESULTS Obturation was effectively removed from the root canal in the REC and PTN groups (P ≤ .001), and the percentages of remaining obturation material were similar between both groups (84.8% PTN vs 86.5% REC) (P > .05). The amount of dentin removed (3.17 ± 2.64 mm(3) PTN versus 3.50 ± 2.82 mm(3) REC), apical transportation (at 1 mm: 0.096 ± 0.189 mm PTN versus 0.093 ± 0.186 mm REC; at 3 mm: 0.059 ± 0.069 mm PTN versus 0.082 ± 0.080 mm REC; at 5 mm: 0.097 ± 0.093 mm PTN versus 0.133 ± 0.138 mm REC), and the working time (269.69 ± 19.25 seconds PTN versus 268.62 ± 16.37 seconds REC) were also similar in both groups (P > .05). One file fractured in the REC group. CONCLUSIONS Both systems were equally effective in the removal of obturation from severely curved canals and can be used for retreatment. Neither system could completely remove the obturation material; therefore, additional techniques are needed to improve cleaning of the root canal.
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Affiliation(s)
- Giselle Nevares
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Camaragibe, Pernambuco, Brazil.
| | - Diana S de Albuquerque
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Camaragibe, Pernambuco, Brazil
| | - Laila G Freire
- School of Dentistry, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Kaline Romeiro
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Camaragibe, Pernambuco, Brazil
| | - Howard M Fogel
- Division of Endodontics, College of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Marcelo Dos Santos
- Division of Endodontics, Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Rodrigo S Cunha
- Division of Endodontics, College of Dentistry, University of Manitoba, Winnipeg, Manitoba, Canada
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3D Micro-CT Analysis of Void and Gap Formation in Curved Root Canals. Eur Endod J 2017; 2:1-5. [PMID: 33403353 PMCID: PMC7757970 DOI: 10.14744/eej.2017.17004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/04/2017] [Accepted: 05/05/2017] [Indexed: 11/20/2022] Open
Abstract
Objective: This study used microcomputed tomography (micro-CT) to compare the volumes of voids and gaps in curved root canals instrumented and filled using various techniques. Methods: Twenty extracted mandibular first molars with two curved mesial root canals were used. Root canals were instrumented using a self-adjusting file (SAF) or Revo-S file system. For standardization, mesiobuccal canals were instrumented with SAF and mesiolingual canals were instrumented with Revo-S in each root. The canals were divided into four experimental groups (n=10 in each). The canals were then filled via cold lateral compaction (CLC) or a thermoplasticized injectable technique (TT) using gutta-percha and AH Plus root canal sealer. The roots were scanned with a micro-CT, and the volumes of the voids and gaps were calculated using three-dimensional (3D) micro-CT images. Data were analyzed using unpaired t- and Kruskal-Wallis tests. A value of P<0.05 was considered significant. Results: None of the tested techniques provided void- or gap-free fillings. Nevertheless, the SAF showed more gap formation than the Revo-S, and TT showed higher gap formation in all experimental groups. These differences, however, were not statistically significant (P>0.05). Conclusion: The SAF and Revo-S rotary file systems yielded comparable results. No statistically significant difference was found between the results of the various instrumentation and filling techniques.
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Adl A, Shahravan A, Farshad M, Honar S. Success Rate and Time for Bypassing the Fractured Segments of Four NiTi Rotary Instruments. IRANIAN ENDODONTIC JOURNAL 2017; 12:349-353. [PMID: 28808464 PMCID: PMC5527213 DOI: 10.22037/iej.v12i3.16866] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The aim of this in vitro study was to compare the success rate and time required for bypassing the fractured segments of four different nickel-titanium (NiTi) rotary systems. METHODS AND MATERIALS This study was conducted on the mesiobuccal canals of 60 mandibular molars with fully-formed apices. Fifteen Flex Master, K3, RaCe and Hero Shaper instruments with 0.04 taper and tip size of #30 and 25 mm in length, were obtained. These instruments were notched at a point 3 mm from the tip of the instrument and were driven into the canals using a handpiece until the instruments fractured and became lodged therein. In the next step, an endodontist tried to bypass the fractured segment using K-files. The number of bypassed samples and the time required for bypassing of each sample were recorded. The Chi-square test was used to compare the bypassing rate among the experimental groups. One-way analysis of variance followed by Tukey's post hoc test was conducted to compare the time taken for bypassing of the fractured fragments. RESULTS One instrument in Flex Master group and two broken segments in each of the K3 and Hero groups were not bypassed. All of the samples in RaCe group were bypassed. No significant difference was found among four tested groups regarding rate of bypassing (P=0.738). The time taken to bypass fragments in the Hero group was significantly more than in those of K3 (P=0.047) and RaCe (P=0.024). CONCLUSION Under the limitations of this study, design features of rotary files can influence the time needed to bypass separated fragments.
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Affiliation(s)
- Alireza Adl
- Department of Endodontics, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Arash Shahravan
- Endodontology Research Center, Kerman University of Medical Sciences, Kerman, Iran
| | - Melika Farshad
- Oral and Dental Disease Research Center, School of Dentistry, Shiraz University of Medical sciences, Shiraz, Iran
| | - Shahab Honar
- Postgraduate Student, Department of Periodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Cassimiro M, Romeiro K, Gominho L, de Almeida A, Costa L, Albuquerque D. Occurence of dentinal defects after root canal preparation with R-phase, M-Wire and Gold Wire instruments: a micro-CT analysis. BMC Oral Health 2017; 17:93. [PMID: 28577367 PMCID: PMC5457538 DOI: 10.1186/s12903-017-0387-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/25/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND This study aims to evaluate the frequency of dentinal defects after root canal preparation with the ProTaper NEXT, K3XF and WaveOne GOLD systems using microcomputed tomography. METHODS Sixty permanent mandibular incisors with a single canal were selected. Inspection of the teeth was performed under a stereomicroscope (15x) to observe the presence of pre-existing cracks and fractures lines. Samples were divided into three experimental groups (n = 20): ProTaper NEXT (PTN), K3XF (K3XF) and WaveOne GOLD (WOG). Specimens were scanned through high-resolution microcomputed tomography before and after the preparation of the root canal. Subsequently, all the axial images were examined by two different methods to find possible dentinal defects. Furthermore, an analysis of each millimeter of ten apical millimeters was also performed. The absence or presence of dentinal defects was screened by 3 pre-calibrated blinded examiners. RESULTS After analysing all 45,720 slices, dentinal defects were observed in 48,33% (22096 slices). PTN, K3XF and WOG groups represented 11,11% (5079 slices), 17,22% (7873 slices) and 20% (n = 9144) of the cross-sectional images, respectively. At 10 apical millimeters (600 slices), 33,33% (200 slices) presented some dentinal defects, representing 7,22% (43 slices), 13,33% (80 slices) and 12,77% (77 slices) of the cross-sectional images in the PTN, K3XF and WOG groups, respectively. All the dentinal defects presented in the postoperative images existed in the images prior to instrumentation. CONCLUSIONS There was no correlation between the preparation of a root canal using the PTN, K3XF and WOG systems and the formation of new dentinal defects.
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Affiliation(s)
- Marcely Cassimiro
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Brazil. .,, Avenida General Newton Cavalcanti, 1650, Camaragibe, PE, 54753-020, Brazil.
| | - Kaline Romeiro
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Brazil
| | - Luciana Gominho
- Department of Odontology, Biological Sciences Unit, Federal University of Campina Grande (UFCG), Campina Grande, PB, Brazil
| | - Andressa de Almeida
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Brazil
| | - Larissa Costa
- Nuclear Department of Energy, Federal University of Pernambuco (UFPE), Recife, PE, Brazil
| | - Diana Albuquerque
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco (UPE), Camaragibe, PE, Brazil
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Alrahabi M. Shaping ability of several nickel–titanium systems in double-curved simulated canals. GIORNALE ITALIANO DI ENDODONZIA 2017. [DOI: 10.1016/j.gien.2017.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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AlRahabi MK. Technical quality assessment of root canal treatment performed by preclinical dental students at Taibah University, KSA. J Taibah Univ Med Sci 2016; 12:27-33. [PMID: 31435209 PMCID: PMC6695017 DOI: 10.1016/j.jtumed.2016.08.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2016] [Revised: 08/21/2016] [Accepted: 08/28/2016] [Indexed: 10/26/2022] Open
Abstract
Objectives The aim of this study was to evaluate the technical quality of root canal treatment (RCT) performed by preclinical undergraduate dental students at the Dental College of Taibah University KSA. Methods In this study, 259 extracted teeth were treated endodontically by preclinical students of the College of Dentistry, Taibah University, KSA, from 2013 to 2015. The evaluation criteria were root canal obturation length, root canal obturation density (homogeneity), and root canal obturation taper. A specific score (0, 1, or 2) was assigned to each parameter. Results Of 259 endodontically extracted teeth, 138 (53.3%) had RCT of unacceptable technical quality, 42 (16.2%) had treatment of slightly acceptable technical quality, 50 (19.3%) had treatment of acceptable technical quality, and 29 (11.2%) teeth had RCT of perfectly acceptable technical quality. There were no significant differences (p > 0.05) in the technical quality of root canal obturation among types of teeth. Conclusion The results of this study showed that there were varied levels of technical quality of root canal treatment performed by preclinical undergraduate dental students, and the outcome varied between unacceptable, slightly acceptable, acceptable, and perfectly acceptable. The unacceptable cases were the most common, representing more than half of all cases, and the perfectly acceptable cases were the least common. There is an urgent need to improve the endodontics teaching programmes in the College of Dentistry of Taibah University. This research should be repeated in the future to evaluate improvement in the performance of RCT by undergraduate dental students in Taibah University.
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Affiliation(s)
- Mothanna K AlRahabi
- Department of Restorative Dental Science, College of Dentistry, Taibah University, Almadinah Almunawwarah, KSA
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Technical quality of a matching-taper single-cone filling technique following rotary instrumentation compared with lateral compaction after manual preparation: a retrospective study. Clin Oral Investig 2016; 21:643-652. [PMID: 27522217 DOI: 10.1007/s00784-016-1931-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 08/02/2016] [Indexed: 10/21/2022]
Abstract
OBJECTIVES The objectives of the study were to evaluate the radiographic technical quality of root canal treatment before and after the implementation of a nickel-titanium rotary (NiTiR) preparation followed by a matching-taper single-cone (mSC) obturation and to detect the procedural errors associated with this technique. MATERIALS AND METHODS A random sample of 535 patients received root canal treatment at the Department of Conservative Dentistry and Periodontology at the University of Würzburg: 254 teeth were treated in 2002-2003 by using stainless steel instruments (SSI) for preparation and a lateral compaction (LC) technique (classic group (CG)). Two hundred eighty-one teeth were root filled in 2012-2013 employing NiTiR instruments for the root canal shaping and a mSC technique (advanced group (AG)). The quality assessments were based on the radiographic criteria of the European Society of Endodontology. The presence of voids was recorded separately for the apical, central and cervical thirds of the root canals. Procedural errors, such as ledges, apical transportations, perforations and fractured instruments, were detected. The root canal fillings in the CG and AG were compared using chi-squared and Fisher's exact tests. Multivariable logistic regression was performed to investigate the association between the independent variables (patient age, tooth type and type of treatment) and the dependent variables (density and length). RESULTS Adequate length was achieved significantly more often in the AG compared to the CG for molars (p = 0.017), mandibular teeth (p = 0.013) and primary root canal treatments (p = 0.024). No significant difference was detected between the AG and CG regarding adequate length in general (p = 0.051) or adequate overall quality of root canal filling (p = 0.1). In the AG, a significant decrease in procedural errors was evident (p = 0.019) and decreases in the densities of the root canal fillings in the cervical (p = 0.01) and central (p = 0.01) thirds of the root canals were also observed. Moreover, root canals in elderly patients exhibited fewer voids (p = 0.009). CONCLUSIONS Rotary root canal preparation followed by a matching-taper single-cone filling technique provides a reliable shaping of the root canal, with fewer procedural errors and a more acceptable filling quality in terms of length and homogeneity in the apical third. Less favourable results were achieved in the central and cervical parts of the root canals. CLINICAL RELEVANCE The matching-taper single-cone technique seems to effectively obturate well-tapered root canals after adequate rotary instrumentation. Irregularly shaped canals require additional lateral or warm vertical condensation to avoid voids.
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Likhitkar MS, Kulkarni SV, Burande A, Solanke V, Kumar CS, Kamble B. To evaluate the influence of smear layer with different instruments and obturation methods on microleakage of root canal filled teeth: In vitro study. J Int Soc Prev Community Dent 2016; 6:240-4. [PMID: 27382541 PMCID: PMC4916799 DOI: 10.4103/2231-0762.183110] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 04/26/2016] [Indexed: 11/04/2022] Open
Abstract
AIMS AND OBJECTIVES The success of root canal treatment depends on proper debridement, instrumentation, proper accessibility, and proper restoration. The presence of a smear layer is considered to be a significant factor. This in vitro study was conducted to assess the effect of the presence/absence of a smear layer on the microleakage of root canal filled teeth using different instruments and obturation methods. MATERIALS AND METHODS One hundred extracted mandibular premolars with closed apices and single roots were chosen and then divided into six groups, A to F, consisting of 15 teeth each. The control group included 10 teeth; 5 positive and 5 negative. The teeth were decoronated at the cementoenamel junction. Groups A, B, C, and D were instrumented with engine-driven rotary Protaper NiTi files. Groups E and F were instrumented with conventional stainless steel hand files. Groups A, C, and E were flushed with 3 ml of 17% EDTA to remove the smear layer prior to obturation. All teeth were flushed with 5.25% sodium hypochlorite solution and obturated with AH-Plus sealer with lateral condensation technique for Groups C, D, E, F and with thermoplasticized gutta-percha technique for Groups A and B. Using an electrochemical technique, leakages in the obturated canals were assessed for 45 days. The results were tabulated using Student's t-test (paired and unpaired t-test) with the Statistical Package for the Social Sciences Software Version 21 (IBM Company, New York, USA). RESULTS Group A showed the lowest mean value at intervals of 10, 20, 30, and 45 days. There was no current flow in the negative controls during the test period. There was leakage in the positive controls within a few minutes of immersion. CONCLUSION The results showed that rotary instrumentation contributed toward an exceptional preparation of root canals compared to hand instrumentation. Elimination of the smear layer enhanced the resistance to microleakage; thermoplasticized gutta-percha obturation technique produced a better seal compared to the lateral condensation technique.
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Affiliation(s)
- Manoj S Likhitkar
- Department of Conservative and Endodontics, Dr. H.S.R.S.M. Dental College and Hospital, Hingoli, Maharashtra, India
| | - Shantaram V Kulkarni
- Department of Conservative and Endodontics, Dr. H.S.R.S.M. Dental College and Hospital, Hingoli, Maharashtra, India
| | - Aravind Burande
- Department of Conservative and Endodontics, Dr. H.S.R.S.M. Dental College and Hospital, Hingoli, Maharashtra, India
| | - Vishal Solanke
- Department of Conservative and Endodontics, Dr. H.S.R.S.M. Dental College and Hospital, Hingoli, Maharashtra, India
| | - C Sushil Kumar
- Department of Conservative and Endodontics, Dr. H.S.R.S.M. Dental College and Hospital, Hingoli, Maharashtra, India
| | - Babasaheb Kamble
- Department of Conservative and Endodontics, School of Dental Sciences, Kimsdu, Karad, Maharashtra, India
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Santa-Rosa J, de Sousa-Neto MD, Versiani MA, Nevares G, Xavier F, Romeiro K, Cassimiro M, Leoni GB, de Menezes RF, Albuquerque D. Shaping Ability of Single-file Systems with Different Movements: A Micro-computed Tomographic Study. IRANIAN ENDODONTIC JOURNAL 2016; 11:228-33. [PMID: 27471537 PMCID: PMC4947850 DOI: 10.7508/iej.2016.03.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 04/20/2016] [Accepted: 03/05/2016] [Indexed: 11/30/2022]
Abstract
Introduction: This study aimed to perform a rigorous sample standardization and also evaluate the preparation of mesiobuccal (MB) root canals of maxillary molars with severe curvatures using two single-file engine-driven systems (WaveOne with reciprocating motion and OneShape with rotary movement), using micro-computed tomography (micro-CT). Methods and Materials: Ten MB roots with single canals were included, uniformly distributed into two groups (n=5). The samples were prepared with a WaveOne or OneShape files. The shaping ability and amount of canal transportation were assessed by a comparison of the pre- and post-instrumentation micro-CT scans. The Kolmogorov-Smirnov and t-tests were used for statistical analysis. The level of significance was set at 0.05. Results: Instrumentation of canals increased their surface area and volume. Canal transportation occurred in coronal, middle and apical thirds and no statistical difference was observed between the two systems (P>0.05). In apical third, significant differences were found between groups in canal roundness (in 3 mm level) and perimeter (in 3 and 4 mm levels) (P<0.05). Conclusion: The WaveOne and One Shape single-file systems were able to shape curved root canals, producing minor changes in the canal curvature.
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Affiliation(s)
- Joedy Santa-Rosa
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Pernambuco, Brazil
| | | | - Marco Aurelio Versiani
- Department of Restorative Dentistry, Faculty of Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Giselle Nevares
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Pernambuco, Brazil
| | - Felipe Xavier
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Pernambuco, Brazil
| | - Kaline Romeiro
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Pernambuco, Brazil
| | - Marcely Cassimiro
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Pernambuco, Brazil
| | - Graziela Bianchi Leoni
- Department of Restorative Dentistry, Faculty of Dentistry, University of São Paulo, Ribeirão Preto, Brazil
| | - Rebeca Ferraz de Menezes
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Pernambuco, Brazil
| | - Diana Albuquerque
- Department of Operative Dentistry and Endodontics, Dental College of Pernambuco, University of Pernambuco, Pernambuco, Brazil
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Pedullà E, Plotino G, Grande NM, Avarotti G, Gambarini G, Rapisarda E, Mannocci F. Shaping ability of two nickel–titanium instruments activated by continuous rotation or adaptive motion: a micro-computed tomography study. Clin Oral Investig 2016; 20:2227-2233. [DOI: 10.1007/s00784-016-1732-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 01/19/2016] [Indexed: 10/22/2022]
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Jatahy Ferreira do Amaral RO, Leonardi DP, Gabardo MCL, Coelho BS, Oliveira KVD, Baratto Filho F. Influence of Cervical and Apical Enlargement Associated with the WaveOne System on the Transportation and Centralization of Endodontic Preparations. J Endod 2016; 42:626-31. [PMID: 26794342 DOI: 10.1016/j.joen.2015.12.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 12/03/2015] [Accepted: 12/05/2015] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate through computed microtomography the transportation and centralization of root canals instrumented using the WaveOne system (Dentsply Maillefer, Ballaigues, Switzerland) associated or unassociated with previous apical and cervical enlargements. METHODS Thirty-six mandibular molars were selected with independent mesial roots and curvatures and randomized into the following groups: PathFile (Dentsply Maillefer) before WaveOne Primary (the PFWO group), ProTaper Universal SX (Dentsply Maillefer) before WaveOne Primary (the SXWO group), and WaveOne Primary (the WO group). Computed microtomographic imaging was performed pre- and postpreparation to obtain measurements of mesial and distal dentin walls and calculations of root canal transportation (%) and centralization. One-way analysis of variance was performed to compare the different groups, repeated measures analysis of variance for comparison of the root thirds in each group, and the Student t test for comparisons between the mesiobuccal and mesiolingual canals. RESULTS Transportation of the cervical and middle thirds to the danger zone was observed in both roots, whereas the apical thirds were transported to the outer face of the curvature. In the PFWO and SXWO groups, less transportation was observed in the middle thirds of the mesiobuccal canals compared with the WO group (P < .05). Centralization remained almost unchanged in the SXWO group (P < .05). CONCLUSIONS In each group, transportation toward the danger zone was mostly observed in the cervical thirds of the mesiobuccal canals. Cervical or apical enlargement resulted in reduced transportation and improved centralization of the middle thirds compared with the exclusive use of the WaveOne system.
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Ferrara G, Taschieri S, Corbella S, Ceci C, Del Fabbro M, Machtou P. Comparative evaluation of the shaping ability of two different nickel-titanium rotary files in curved root canals of extracted human molar teeth. ACTA ACUST UNITED AC 2015; 8. [PMID: 26343421 DOI: 10.1111/jicd.12187] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 07/16/2015] [Indexed: 11/30/2022]
Abstract
AIM The aim of the present study was to compare the shaping ability of two different nickel-titanium rotary files in the curved root canals of extracted human molar teeth. METHODS Thirty root canals of 17 extracted human molars teeth were randomly assigned to two experimental groups (n = 15): ProTaper Next and ProTaper Universal (PTU), on the basis of the rotary files system used. The final size of all apical foramina was 0.25 mm in diameter. Standardized digital radiographs were taken before and after instrumentation in both clinical and proximal views, with a size 10 K-file inserted into the canal for the determination of the angle of curvature and apical transportation. Preparation time and fractured or deformed instruments were also recorded. The unpaired Student's t-test was used to compare results. RESULTS There was no significant difference between the two instruments with respect to canal straightening and apical transportation before and after instrumentation (P > 0.05). The use of both instruments resulted in a significant reduction in the angle of curvature after instrumentation (P < 0.05). Instrumentation time was significantly greater for PTU (P < 0.05). CONCLUSIONS The ProTaper Universal and ProTaper Next systems performed similarly with regard to the straightening of curved root canals and apical transportation. ProTaper Next was significantly faster than ProTaper Universal.
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Affiliation(s)
- Giulia Ferrara
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy.,Istituto di Ricerca e Cura a Carattere Scientifico, Istituto Ortopedico Galeazzi, Milano, Italy
| | - Silvio Taschieri
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy.,Istituto di Ricerca e Cura a Carattere Scientifico, Istituto Ortopedico Galeazzi, Milano, Italy
| | - Stefano Corbella
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy.,Istituto di Ricerca e Cura a Carattere Scientifico, Istituto Ortopedico Galeazzi, Milano, Italy
| | - Caterina Ceci
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy.,Istituto di Ricerca e Cura a Carattere Scientifico, Istituto Ortopedico Galeazzi, Milano, Italy
| | - Massimo Del Fabbro
- Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milan, Italy.,Istituto di Ricerca e Cura a Carattere Scientifico, Istituto Ortopedico Galeazzi, Milano, Italy
| | - Pierre Machtou
- Université Paris 7 Diderot, Unité de Formation et de Recherche d'odontologie, Paris, France
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Ceyhanli KT, Erdilek N, Tatar İ, Celik D. Comparison of ProTaper, RaCe and Safesider instruments in the induction of dentinal microcracks: a micro-CT study. Int Endod J 2015; 49:684-9. [DOI: 10.1111/iej.12497] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 07/03/2015] [Indexed: 11/27/2022]
Affiliation(s)
- K. T. Ceyhanli
- Department of Endodontics; Faculty of Dentistry; Karadeniz Technical University; Trabzon Turkey
| | - N. Erdilek
- Department of Endodontics; Faculty of Dentistry; Ege University; İzmir Turkey
| | - İ. Tatar
- Department of Anatomy; Faculty of Medicine; Hacettepe University; Ankara Turkey
| | - D. Celik
- Department of Endodontics; Faculty of Dentistry; Karadeniz Technical University; Trabzon Turkey
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Çiçek E, Koçak MM, Sağlam BC, Koçak S. Evaluation of microcrack formation in root canals after instrumentation with different NiTi rotary file systems: a scanning electron microscopy study. SCANNING 2015; 37:49-53. [PMID: 25488126 DOI: 10.1002/sca.21178] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Accepted: 10/31/2014] [Indexed: 05/26/2023]
Abstract
The aim of this study was to evaluate the dentinal microcrack formation of ProTaper Universal, ProTaper Next, and WaveOne. Sixty extracted mandibular molars were selected. The mesial roots were resected and randomly divided into four groups (n = 15). The canals were prepared with hand files (group 1), ProTaper Universal (group 2), ProTaper Next (group 3), and WaveOne (group 4) instrument systems. The roots were separated horizontally at 3, 6, and 9 mm from the apex. Digital images were captured at ×40 magnification using scanning electron microscopy to detect microcrack formation. Statistical analysis was performed by Pearson Chi-square test. The prevalence of microcracks in group 2, group 3, and group 4 were significantly higher when compared to group 1 (p < 0.001). Group 2, group 3, and group 4 demonstrated similar prevalence of microcracks without significant difference (p > 0.05) in all sections. All instruments caused microcracks except for hand file. The highest percentage of microcrack was recorded in 3 mm section for all groups.
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Affiliation(s)
- Ersan Çiçek
- Bülent Ecevit University, Faculty of Dentistry, Depertmant of Endodontics, Turkey
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Vallaeys K, Chevalier V, Arbab-Chirani R. Comparative analysis of canal transportation and centring ability of three Ni-Ti rotary endodontic systems: Protaper®, MTwo® and Revo-S™, assessed by micro-computed tomography. Odontology 2014; 104:83-8. [PMID: 25248755 DOI: 10.1007/s10266-014-0176-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Accepted: 08/11/2014] [Indexed: 11/25/2022]
Abstract
The aim of this study was to use high-resolution micro-CT to evaluate the effects of three Ni-Ti rotary endodontic instruments, Mtwo® (VDW, München, Germany), ProTaper® (Dentsply-Maillefer, Ballaigues, Switzerland) and Revo-S™ (MicroMega, Besançon, France), on canal transportation and centring ratio. Fifty-four mesial roots of extracted mandibular molars with an angle of curvature of 25-35° were randomly divided into three groups of eighteen. Each group was instrumented with a previously unused Ni-Ti rotary system. The final instruments used were #30/0.05 taper (Mtwo®), F3 #30/0.09 apical taper (ProTaper®) and AS30 #30/0.06 taper (Revo-S™). Teeth were scanned before and after instrumentation using micro-computed tomography with a spatial resolution of 20 μm to measure volume and shaping changes. All images were filtered to improve signal-to-noise ratio. To determine the perimeter of roots and canals exactly, images were segmented in each slice with an edge detection process. Canal transportation and centring ratio were evaluated at 1, 3, 5 and 7 mm from the end of each root. The method developed by Gambill et al. was chosen. ANOVA was conducted with the significance threshold set at p < 0.05. No statistically significant differences were found among the three groups in terms of canal transportation or centring ratio at any level. These systems give similar results with regard to the tested shaping parameters. Under the tested conditions and within the limitations of this study, these systems were able to produce centred preparations of curved canals with minimal transportation.
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Affiliation(s)
- Karen Vallaeys
- Dental School, Hospital University of Bretagne Occidentale, Brest, France.
- Laboratory of Medical Information Processing, LaTIM-INSERM UMR, 1101, Brest, France.
| | - Valérie Chevalier
- Dental School, Hospital University of Bretagne Occidentale, Brest, France
- Laboratory of Brest and Mechanical System, LBMS EA, 4325, Brest, France
| | - Reza Arbab-Chirani
- Dental School, Hospital University of Bretagne Occidentale, Brest, France
- Laboratory of Medical Information Processing, LaTIM-INSERM UMR, 1101, Brest, France
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Bürklein S, Mathey D, Schäfer E. Shaping ability of ProTaper NEXT and BT-RaCe nickel-titanium instruments in severely curved root canals. Int Endod J 2014; 48:774-81. [DOI: 10.1111/iej.12375] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 08/20/2014] [Indexed: 11/29/2022]
Affiliation(s)
- S. Bürklein
- Central Interdisciplinary Ambulance in the School of Dentistry; University of Münster; Münster Germany
| | - D. Mathey
- Department of Operative Dentistry; University of Münster; Münster Germany
| | - E. Schäfer
- Central Interdisciplinary Ambulance in the School of Dentistry; University of Münster; Münster Germany
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Nabeshima CK, Caballero-Flores H, Cai S, Aranguren J, Borges Britto ML, Machado MEDL. Bacterial removal promoted by 2 single-file systems: Wave One and One Shape. J Endod 2014; 40:1995-8. [PMID: 25149120 DOI: 10.1016/j.joen.2014.07.024] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 06/12/2014] [Accepted: 07/14/2014] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Different single-file systems are available for endodontic treatment; however, comparative studies are scarce. Thus, the present study evaluated bacterial reduction promoted by 2 single-file systems: Wave One (Dentsply Maillefer, Ballaigues, Switzerland) and One Shape (Micromega, Besancon, France). METHODS Forty-five distobuccal root canals of upper molars sterilized with ethylene oxide were infected with Enterococcus faecalis for 21 days, and then root canal initial bacterial sample was collected with paper cones and plated on M-enterococcus agar. The specimens were randomly divided into 3 groups according to instrumentation (n = 15): Wave One, One Shape, and the crown-down manual technique (control group). The other 6 specimens without contamination were control asepsis. After instrumentation, samples were collected with the use of scraping and paper cones. The bacterial reduction was calculated, and then intragroup analysis was performed using the paired t test and intergroup analysis using analysis of variance (both at 5% significance). RESULTS All techniques significantly reduced the number of bacteria in the root canal (P < .05), with no significant difference between them (P > .05). The aseptic control group did not show any bacterial growth. CONCLUSIONS It can be concluded that the single-file systems Wave One and One Shape significantly reduce the bacterial number in the root canal and that there is no significant difference in their bacterial reduction abilities.
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Affiliation(s)
- Cleber Keiti Nabeshima
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil.
| | - Hector Caballero-Flores
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, SP, Brazil
| | - Silvana Cai
- Derpartment of Microbiology, Institute of Biological Science, University of São Paulo, São Paulo, SP, Brazil
| | - José Aranguren
- Department of Endodontics, School of Dentistry, Rey Juan Carlos of Madrid University, Madrid, ES-M, Spain
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Comparison of Cyclic Fatigue Resistance of Nickel-Titanium Coronal Flaring Instruments. J Endod 2014; 40:1182-5. [DOI: 10.1016/j.joen.2013.12.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 12/25/2013] [Accepted: 12/30/2013] [Indexed: 11/30/2022]
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Ordinola-Zapata R, Bramante CM, Duarte MAH, Cavenago BC, Jaramillo D, Versiani MA. Shaping ability of reciproc and TF adaptive systems in severely curved canals of rapid microCT-based prototyping molar replicas. J Appl Oral Sci 2014; 22:509-15. [PMID: 24918662 PMCID: PMC4307764 DOI: 10.1590/1678-775720130705] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 02/21/2014] [Indexed: 12/01/2022] Open
Abstract
Objective: To evaluate the shaping ability of Reciproc and Twisted-File Adaptive systems in
rapid prototyping replicas. Material and Methods: Two mandibular molars showing S-shaped and 62-degree curvatures in the mesial root
were scanned by using a microcomputed tomography (μCT) system. The data were
exported in the stereolitograhic format and 20 samples of each molar were printed
at 16 µm resolution. The mesial canals of 10 replicas of each specimen were
prepared with each system. Transportation was measured by overlapping radiographs
taken before and after preparation and resin thickness after instrumentation was
measured by μCT. Results: Both systems maintained the original shape of the apical third in both anatomies
(P>0.05). Overall, considering the resin thickness in the 62-degree replicas,
no statistical difference was found between the systems (P>0.05). In the
S-shaped curvature replica, Reciproc significantly decreased the thickness of the
resin walls in comparison with TF Adaptive. Conclusions: The evaluated systems were able to maintain the original shape at the apical third
of severely curved mesial canals of molar replicas.
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Affiliation(s)
- Ronald Ordinola-Zapata
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Clovis Monteiro Bramante
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Marco Antonio Húngaro Duarte
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - Bruno Cavalini Cavenago
- Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, SP, Brazil
| | - David Jaramillo
- Department of Endodontics, Loma Linda School of Dentistry, University of Loma Linda, Loma Linda, United States
| | - Marco Aurélio Versiani
- Department of Endodontics, Ribeirão Preto School of Dentistry, University of São Paulo, Ribeirão Preto, SP, Brazil
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Capar ID, Ertas H, Ok E, Arslan H, Ertas ET. Comparative Study of Different Novel Nickel-Titanium Rotary Systems for Root Canal Preparation in Severely Curved Root Canals. J Endod 2014; 40:852-6. [DOI: 10.1016/j.joen.2013.10.010] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 10/03/2013] [Indexed: 11/29/2022]
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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; 15:174-180. [PMID: 25095839 DOI: 10.5005/jp-journals-10024-1510] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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 micro-computed 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.
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Affiliation(s)
- Dina Al-Sudani
- Associate Professor and Consultant, Endodontic Division, Department of Restorative Dental Sciences, College of Dentistry, King Saud University, Saudi Arabia
| | - Majed Almalki
- Endodontist, Department of Dentistry, King Fahd Military Medical Complex Dhahran, Saudi Arabia
| | - Saad Al-Shahrani
- Endodontist, Department of Dentistry, Armed Forces Hospital, Dhahran Saudi Arabia
| | - Michael Ahlquist
- Associate Professor, Department of Dental Medicine, Cariology and Endodontology Division, Karolinska Institutet, Stockholm, Sweden
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Hu W, Whitten B, Sedgley C, Svec T. Effect of three NiTi files on transportation of the apical foramen. Int Endod J 2014; 47:1064-71. [DOI: 10.1111/iej.12249] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 01/10/2014] [Indexed: 11/29/2022]
Affiliation(s)
- W. Hu
- Department of Endodontology; Oregon Health & Science University; Portland OR USA
| | - B. Whitten
- Department of Endodontology; Oregon Health & Science University; Portland OR USA
| | - C. Sedgley
- Department of Endodontology; Oregon Health & Science University; Portland OR USA
| | - T. Svec
- Department of Endodontology; Oregon Health & Science University; Portland OR USA
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Al-Manei KK, Al-Hadlaq SMS. Evaluation of the root canal shaping ability of two rotary nickel-titanium systems. Int Endod J 2014; 47:974-9. [DOI: 10.1111/iej.12243] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 01/01/2014] [Indexed: 11/27/2022]
Affiliation(s)
- K. K. Al-Manei
- Division of Endodontics; Department of Restorative Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
| | - S. M. S. Al-Hadlaq
- Division of Endodontics; Department of Restorative Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
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Bürklein S, Schäfer E. Critical evaluation of root canal transportation by instrumentation. ACTA ACUST UNITED AC 2013. [DOI: 10.1111/etp.12043] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Haapasalo M, Shen Y. Evolution of nickel-titanium instruments: from past to future. ACTA ACUST UNITED AC 2013. [DOI: 10.1111/etp.12049] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bürklein S, Börjes L, Schäfer E. Comparison of preparation of curved root canals with Hyflex CM and Revo-S rotary nickel-titanium instruments. Int Endod J 2013; 47:470-6. [DOI: 10.1111/iej.12171] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 07/12/2013] [Indexed: 11/26/2022]
Affiliation(s)
- S. Bürklein
- Central Interdisciplinary Ambulance in the School of Dentistry; University of Münster; Münster Germany
| | - L. Börjes
- Central Interdisciplinary Ambulance in the School of Dentistry; University of Münster; Münster Germany
| | - E. Schäfer
- Central Interdisciplinary Ambulance in the School of Dentistry; University of Münster; Münster Germany
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