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Medina-Torres L, Cochran C, Bauer PA, Valcanaia AJ, Sindu D, Cavalcanti B, McDonald N. Effect of different instrumentation techniques on students' performance and outcomes of nonsurgical root canal treatment. J Dent Educ 2024; 88:940-948. [PMID: 38557969 DOI: 10.1002/jdd.13523] [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] [Received: 08/03/2023] [Revised: 01/18/2024] [Accepted: 03/03/2024] [Indexed: 04/04/2024]
Abstract
OBJECTIVES This study compared, retrospectively, the incidence of clinical errors and effects on treatment outcomes, when students were exposed to two different instrumentation techniques: a hybrid rotary technique (HYB), consisting of both hand instrumentation with hand stainless steel and Ni-Ti files plus the use of a rotary system (Vortex Blue, Dentsply Sirona), versus a full reciprocation instrumentation technique (WaveOne Gold [WOG], Dentsply Sirona). METHODS A total of 368 endodontic cases (n = 184) in anterior and premolar teeth, completed by dental students at the University of Michigan School of Dentistry from 2013 to 2022, were used for the study. The groups were evaluated by two calibrated clinicians, observing the incidence of clinical errors: file separations, over-instrumentation, ledges and transportations. Treatment outcomes were also observed. Data were analyzed statistically by Fisher's exact test and Mann-Whitney U test (p < 0.05). RESULTS No significant difference in file separations, ledges, and transportation was observed between the two groups. However, the WOG Group experienced significantly more over-instrumentation than HYB group, although this did not significantly affect tooth survival or periapical index (PAI). Cases with PAI scores of 5 were found to have significantly less tooth survival compared to the other PAI scores. CONCLUSIONS It can be concluded that both techniques in our study are well suited to advancing the endodontic dental education of students and novice operators, anticipating relatively successful outcomes of tooth survival, as long as the cases selected are less severe in progression preoperatively.
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Affiliation(s)
- Luis Medina-Torres
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Clarence Cochran
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Patricia Ann Bauer
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Andre Joao Valcanaia
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Devika Sindu
- Norton Thoracic Institute, St. Joseph's Hospital and Medical Center, Phoenix, Arizona, USA
| | - Bruno Cavalcanti
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
| | - Neville McDonald
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan School of Dentistry, Ann Arbor, Michigan, USA
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Almazedi RAK, Al-Zaka IM. Influence of two kinematics on canal transportation and centering ability of WaveOne Gold and One Curve files. AUST ENDOD J 2024; 50:24-39. [PMID: 37849452 DOI: 10.1111/aej.12804] [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] [Received: 10/06/2022] [Revised: 08/09/2023] [Accepted: 10/05/2023] [Indexed: 10/19/2023]
Abstract
This research examines canal transportation and centering ability of single-file systems when operated in continuous rotation or reciprocation. Sixty J-shaped resin blocks were used. The specimens were divided into two main groups (n = 30). Then, based on the motion used to operate the instruments, each group was subdivided into two subgroups (n = 15). Group A1: One Curve/rotation, Group A2: One Curve/clockwise reciprocation, Group B1: WaveOne Gold/Reciprocation, Group B2: WaveOne Gold/counter-clockwise rotation. Pre- and post-instrumentation images were obtained using digital microscope. Canal transportation was measured at five levels. A non-significant difference (p > 0.05) resulted between two motions at all levels. However, group A1 showed significantly less transportation at levels 3 and 4 (p ≤ 0.05), also more centered preparation at level 4 (p ≤ 0.05) than group B1. Within the limitations of this study, the apical transportation and centering ability of single-file systems are unaffected by different kinematics.
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Affiliation(s)
- Raghda A K Almazedi
- Department of Conservative Dentistry, College of Dentistry, Mustansiriyah University, Baghdad, Iraq
| | - Iman M Al-Zaka
- Department of Conservative Dentistry, College of Dentistry, Mustansiriyah University, Baghdad, Iraq
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Sturm R, Reeb A, Wolf-Yamamura O, Neumann K, Shemesh H, Bitter K. Teaching rotary root canal instrumentation using a Peyton teaching approach. EUROPEAN JOURNAL OF DENTAL EDUCATION : OFFICIAL JOURNAL OF THE ASSOCIATION FOR DENTAL EDUCATION IN EUROPE 2023; 27:879-887. [PMID: 36463433 DOI: 10.1111/eje.12878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 10/10/2022] [Accepted: 11/13/2022] [Indexed: 06/17/2023]
Abstract
INTRODUCTION The aim of the study was two evaluate the effectiveness of a Peyton teaching approach for rotary root canal instrumentation, in comparison to the traditional "see one-do one" method. MATERIAL AND METHODS Forty undergraduate students were randomly divided into two groups (n = 20). Students of the first group (G1) were taught how to use rotary instrumentation using a modified Peyton method, whilst the second group (G2) watched a teaching video (30 min) on the same subject. Both groups instrumented a plastic block and subsequently both mesial canals of an extracted lower molar. The quality of the root canal instrumentation was analysed by 2 blinded observers on video recordings and x-rays. RESULTS Interobserver correlation was 0.917 (p < .0005; Pearson) for the assessment of the video recordings; students of G1 received significantly more total points (83.55 ± 6.82 points) compared to G2 (69.76 ± 13.82) (p = .001; t-test), the gender had no significant effect on the overall results (p = .444; two-way ANOVA). Significant differences were detected for the categories "initial scouting," "coronal enlargement," "glide path preparation," "preparation using X2 file," "preparation using X3 file" (p < .05; t-test) as well as for the subcategories "sequence of rinse, recapitulation, rinse" (p = .001; t-test) and "recapitulation" (p < .002; t-test). No differences between groups were observed for the radiographic evaluation with respect to working length and canal straightening. CONCLUSION Teaching rotary instrumentation by using the Peyton approach resulted in improved performance of undergraduate students assessed with a checklist-based process analysis. Enhanced implementation of rotary instrumentation could result in better long-term results of students' root canal treatment.
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Affiliation(s)
- Richard Sturm
- Department of Operative, Preventive and Pediatric Dentistry, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Alexander Reeb
- Department of Operative, Preventive and Pediatric Dentistry, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | | | - Konrad Neumann
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
- Institute of Biometry and Clinical Epidemiology, Berlin, Germany
| | - Hagay Shemesh
- Department of Endodontology, Academic Center of Dentistry Amsterdam, University of Amsterdam and VU University, Amsterdam, The Netherlands
| | - Kerstin Bitter
- Department of Operative, Preventive and Pediatric Dentistry, Berlin, Germany
- Charité - Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
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Hamed SA, Shabayek S, Hassan HY. Biofilm elimination from infected root canals using four different single files. BMC Oral Health 2022; 22:660. [PMID: 36585632 PMCID: PMC9805083 DOI: 10.1186/s12903-022-02690-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Accepted: 12/22/2022] [Indexed: 01/01/2023] Open
Abstract
INTRODUCTION Enterococcus faecalis (E. faecalis) is the most commonly isolated bacterium from infected root canals. It is found in the form of a biofilm, which makes it more resistant to antimicrobials, and requires optimal chemomechanical strategies to maximize root canal disinfection. AIM To evaluate the efficacy of 4 different endodontic file systems against E. faecalis biofilm growth in root canals using colony-forming units per milliliter (CFU/mL) and scanning electron microscope (SEM). METHODS Eighty-five extracted human mandibular premolars with straight root canals and apical diameters not larger than the #15 K-file were randomly selected. After performing a pilot study (n = 15) to determine the ideal incubation period for E. faecalis biofilm development, sixty-five root canals were infected with E. faecalis, incubated for 3 weeks, and then mechanically prepared using one of four single files (XP-endo Shaper, Hyflex EDM, One Curve, and Fanta. AFTM F One) (n = 15). Five infected root canals were excluded for the positive control. Five non-contaminated root canals were included for the negative control. Samples were collected using sterile paper points pre- and post-instrumentation to determine the bacterial load (CFU/mL). Root canals from each group were topographically evaluated at the coronal, middle, and apical segments using scanning electron microscope (SEM). Bacterial reduction data were estimated and statistically analyzed by Kruskal-Wallis and Mann-Whitney U tests (post hoc test) (P ≤ .05). RESULTS XP-endo Shaper, Hyflex DEM, and One Curve significantly could eradicate E. faecalis biofilms in infected root canals with no significant difference among them compared to Fanta. AF™ F One. CONCLUSION None of the systems were capable of completely eliminating biofilms. XP-endo Shaper, Hyflex EDM, and One Curve mechanically eliminated E. faecalis biofilms compared to Fanta. AF™ F One from infected root canals.
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Affiliation(s)
- Sarah A. Hamed
- grid.33003.330000 0000 9889 5690Endodontic Department, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt
| | - Sarah Shabayek
- grid.33003.330000 0000 9889 5690Microbiology and Immunology Department, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt
| | - Hayam Y. Hassan
- grid.33003.330000 0000 9889 5690Endodontic Department, Faculty of Dentistry, Suez Canal University, Ismailia, Egypt
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Unno H, Ebihara A, Hirano K, Kasuga Y, Omori S, Nakatsukasa T, Kimura S, Maki K, Okiji T. Mechanical Properties and Root Canal Shaping Ability of a Nickel-Titanium Rotary System for Minimally Invasive Endodontic Treatment: A Comparative In Vitro Study. MATERIALS (BASEL, SWITZERLAND) 2022; 15:7929. [PMID: 36431416 PMCID: PMC9692467 DOI: 10.3390/ma15227929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/02/2022] [Accepted: 11/03/2022] [Indexed: 06/16/2023]
Abstract
Selection of an appropriate nickel−titanium (NiTi) rotary system is important for minimally invasive endodontic treatment, which aims to preserve as much root canal dentin as possible. This study aimed to evaluate selected mechanical properties and the root canal shaping ability of TruNatomy (TRN), a NiTi rotary system designed for minimally invasive endodontic shaping, in comparison with existing instruments: HyFlex EDM (HEDM), ProTaper Next (PTN), and WaveOne Gold (WOG). Load values measured with a cantilever bending test were ranked as TRN < HEDM < WOG < PTN (p < 0.05). A dynamic cyclic fatigue test revealed that the number of cycles to fracture was ranked as HEDM > WOG > TRN > PTN (p < 0.05). Torque and vertical force generated during instrumentation of J-shaped artificial resin canals were measured using an automated instrumentation device connected to a torque and vertical force measuring system; TRN exhibited smaller torque and vertical force values in most comparisons with the other instruments. The canal centering ratio for TRN was smaller than or comparable to that for the other instruments except for WOG at the apex level. Under the present experimental conditions, TRN showed higher flexibility and lower torque and vertical force values than the other instruments.
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Comparative Assessment of the Shaping Ability of Reciproc Blue, WaveOne Gold, and ProTaper Gold in Simulated Root Canals. MATERIALS 2022; 15:ma15093028. [PMID: 35591361 PMCID: PMC9102275 DOI: 10.3390/ma15093028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/05/2022] [Accepted: 04/20/2022] [Indexed: 11/23/2022]
Abstract
Maintaining the original trajectory of the root canal is a major challenge in endodontic therapy, especially in narrow and curved root canals. The present study aims to assess the shaping capacity of three endodontic systems made of different nickel−titanium alloys on simulated curved root canals. Thirty-six endodontic resin blocks (Ref. V040245, VDW) divided into three groups, each of twelve blocks (n = 12), were shaped, photographed, and analyzed: Group 1-Protaper Gold (PTG) (Dentsply Maillefer, Ballaigues, Switzerland) F2 25/08; Group 2-Reciproc Blue (RB), RB 25/08 (VDW, Munich, Germany); Group 3-WaveOne Gold (WOG) (Dentsply Maillefer), WOG 25/07. Each block was standardized and photographed before and after shaping in the same position, with the foramen oriented to the left. Post-shaping images were superimposed onto the initial ones. Thirteen measurement points were used for evaluation, spaced with 1 mm distance from one another, from level 0, apical foramen, to level 12, coronal orifice. The amount of removed resin from inner (X1) and outer (X2) walls, the direction of transportation (X1 − X2), and the centering ability (X1 − X2)/Y were measured, calculated, and comparatively analyzed. Statistical differences (p < 0.05) were observed between the shaping capacity of the considered systems in the middle and coronal thirds. PTG had a better centering ability than WOG and RB in the coronal third, while RB was more centered in the middle third in comparison to both WOG and PTG. In the apical third, the centering capacity of WOG was higher, without being statistically significant. WOG 25/07 and PTG 25/08 tend to cut more on the inner wall of the root canals, and RB 25/08 on the external one.
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Shi L, Zhou J, Wan J, Yang Y. Shaping ability of ProTaper Gold and WaveOne Gold nickel-titanium rotary instruments in simulated S-shaped root canals. J Dent Sci 2022; 17:430-437. [PMID: 35028067 PMCID: PMC8740102 DOI: 10.1016/j.jds.2021.08.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 11/23/2022] Open
Abstract
Background/purpose Gold metal technology improves flexibility and the resistance to cyclic fatigue of the endodontic mechanical files. This study compared the performance of ProTaper Gold (PTG) multiple file system and WaveOne Gold (WOG) single file system in simulated S-shaped root canals, which represents one of the most challenging root canal morphology. Materials and methods Forty S-shaped canals (n = 20 canals/per group) in resin blocks were instrumented to an apical size of 0.25 mm using PTG and WOG Primary, respectively. The total amount of resin removal, canal transportation, centering ratio, and the degree of canal straightening were measured in Photoshop CS6 software. Statistical analysis was performed by using Mann–Whitney U-test (α = .05). Results None of the files fractured during the instrumentation. The WOG group removed significantly less amount of resin at 0, 3, 6, 7 and 9 mm from the apex (P < .05). The WOG group remained more centered in canals at 0 mm from the apex (P < .05). The PTG group showed a better centering ability and less canal transportation at 4, 5 and 6 mm from the apex (P < .05). In the coronal curvature portion, the use of WOG Primary significantly decreased curvature angle and increased radius compared with PTG instruments (P < .05). There was no significant difference between the two groups in terms of the apical curvature angle and radius change (P > .05). Conclusion The WOG Primary file has a less aggressive dentin cutting and more centered apical preparation. The PTG system is more advantageous in shaping the coronal curvature of S-shaped canal.
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Affiliation(s)
- Lu Shi
- Department of Endodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Junling Zhou
- Department of Endodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Jie Wan
- Department of Endodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
| | - Yunfei Yang
- Department of Endodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, People's Republic of China
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Xu F, Zhang Y, Gu Y, Ping Y, Zhou R, Wang J. Shaping ability of four single-file systems in the instrumentation of second mesiobuccal canals of three-dimensional printed maxillary first molars. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1425. [PMID: 34733977 PMCID: PMC8506727 DOI: 10.21037/atm-21-3855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 08/26/2021] [Indexed: 12/18/2022]
Abstract
Background This study evaluated and compared the shaping ability of four advanced single-file nickel-titanium (NiTi) systems during the preparation of curved second mesiobuccal (MB2) canals in maxillary first molar replicas fabricated by three-dimensional (3D) printing via micro-computed tomography (Micro-CT) imaging. Methods A total of 60 3D-printed maxillary first molar replicas were constructed from one extracted tooth, with an angle of curvature ranging from 15° to 25°. The MB2 canals from these 60 replicas were divided into 4 groups of 15 replicas according to the canal instrumentation system used, namely, Waveone gold (WOG), Reciproc blue (RCB), XP-endo shaper (XPS) and M3-L. The specimens were scanned before and after preparation using Micro-CT. The pre- and post-instrumentation images of each specimen were superimposed, and the amount of resin removed, the change in surface area, the canal transportation, and centering ability were assessed using the Mimics software. Instrumentation time was also recorded. One-way analysis of variance and least significant difference (LSD) tests were used to statistically compare the groups. The significance level was set at 5%. Results Instrumentation time with M3-L was significantly longer than the other systems (P<0.05). The amount of resin removed and the change in surface area generated by the 4 systems were different at the apical, middle, and coronal thirds, and the total canal (P<0.05). Overall, WOG and XPS resulted in the less change than RCB and M3-L. There was no significant difference among the groups at the middle third regarding canal transportation and centering ability (P>0.05). However, a significant difference was found at the apical level (P<0.05), where RCB showed the poorest centering ability and the highest canal transportation (P<0.05). In addition, XPS resulted in the least canal transportation (P<0.05) at the coronal level, while there was no significant difference between the four groups in terms of centering ability. Conclusions The M3-L instrument required more time to prepare the curved MB2 canals compared with the other systems. Overall, WOG and XPS showed the least resin removal and surface area change. M3-L, XPS, and WOG instruments respected the original canal curvature better than RCB files.
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Affiliation(s)
- Fulu Xu
- Department of Endodontics and Operative Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China.,Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Yuerong Zhang
- Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China.,Department of General Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China
| | - Yongchun Gu
- Department of Dentistry, The Ninth People's Hospital of Suzhou, China
| | - Yifan Ping
- Department of Endodontics and Operative Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China.,Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Ruyu Zhou
- Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Juan Wang
- Department of Endodontics and Operative Dentistry, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing, China.,Jiangsu Province Key Laboratory of Oral Diseases, Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
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Poly A, Marques F, Moura Sassone L, Karabucak B. The shaping ability of WaveOne Gold, TRUShape and XP-endo Shaper systems in oval-shaped distal canals of mandibular molars: A microcomputed tomographic analysis. Int Endod J 2021; 54:2300-2306. [PMID: 34473842 DOI: 10.1111/iej.13625] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 01/07/2023]
Abstract
AIM To compare the shaping ability of a heat-treated centric reciprocating file system (WaveOne Gold), a heat-treated eccentric rotary multifile system (TRUShape 3D Conforming Files), and a heat-treated expandable one-file rotary system (XP-endo Shaper) extending its activation time, in preparing oval-shaped root canals in extracted mandibular molars by means of microcomputed tomography (micro-CT) analysis. METHODOLOGY Thirty moderately curved oval-shaped distal roots of mandibular molars were selected. The normality of canal length, curvature angle, volume, surface area, structure model index, and aspect ratio were confirmed. The samples were randomly divided into three groups (n = 10). Micro-CT scans were taken before and after canals were instrumented using WaveOne Gold (size 35, .06 taper), or TRUShape (size 30, .06v taper), both following the manufacturer's instructions, or XP-endo Shaper following a new protocol with extended activation time. The mechanical preparation time for each sample was recorded. Pre- and postoperative images were analysed for the percentage of unprepared canal areas and the percentage of removed dentine. Data were compared between groups using the statistical analyses one-way ANOVA and Tukey tests (p < .05). RESULTS The percentage of unprepared canal areas was significantly higher with WaveOne Gold (% 11.5 ± 4.0) and TRUShape (% 12.4 ± 5.8) compared with XP-endo Shaper (% 5.2 ± 2.6) (p < .05). XP-endo Shaper removed significantly more dentine (3.3 ± 1.5 mm3 ) than WaveOne Gold (1.8 ± 0.8 mm3 ) and TRUShape (1.9 ± 0.8 mm3 ) (p < .05). No significant differences were seen for mechanical preparation time between WaveOne Gold (79 ± 31 s), TRUShape (104 ± 41 s) and XP-endo Shaper (71 ± 23 s) (p > .05). CONCLUSIONS The comparison of three recognized root canal filing systems has shown that with similar preparation times, the XP-endo Shaper removed more dentine (mm3 ) leaving less unprepared canal wall area (%) than WaveOne Gold and TRUShape when preparing oval-shaped root canals of extracted mandibular molars.
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Affiliation(s)
- Ane Poly
- Proclin Department, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernando Marques
- Department of Endodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Luciana Moura Sassone
- Proclin Department, School of Dentistry, State University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bekir Karabucak
- Department of Endodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, PA, USA
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10
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Peraça VDO, Xavier SR, de Almeida Gomes F, Dos Santos LGP, Souza EM, Pappen FG. Effect of number of uses and sterilization on the instrumented area and resistance of reciprocating instruments. Restor Dent Endod 2021; 46:e28. [PMID: 34123764 PMCID: PMC8170385 DOI: 10.5395/rde.2021.46.e28] [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: 07/19/2020] [Revised: 11/28/2020] [Accepted: 12/24/2020] [Indexed: 11/11/2022] Open
Abstract
Objectives This study evaluated the effect of repeated uses and autoclaving in the instrumented area, fracture resistance, and time of instrumentation of thermally treated nickel-titanium reciprocating systems. Materials and Methods Two hundred simulated canals were instrumented using Reciproc Blue and WaveOne Gold. Each file was used up to 10 times or until fracture. The instrumented area was measured in pre- and post-operative images, using ImageJ software. Kaplan-Meier survival analysis evaluated the number of uses of instruments before fracture. Instrumented area and time of instrumentation were analyzed by Mann-Whitney U test and Kruskal-Wallis. Correlations among the number of uses and instrumented area were measured. The level of statistical significance was set at p < 0.05. Results Reciproc Blue presented a higher estimated number of uses in comparison with WaveOne Gold (p = 0.026), but autoclaving did not affect the resistance to fracture of instruments (p > 0.05). The instrumented area was different among the evaluated groups (p = 0.039), and the instrumented area along the uses of both tested instruments was reduced. With the time of instrumentation, there was also a significant difference among the evaluated groups; the groups without sterilization cycles were faster, in comparison to those submitted to autoclaving (p = 0.010). Conclusions Reciproc Blue was more resistant than WaveOne Gold, suffering later fracture. Additionally, the sterilization cycles did not influence the estimated number of uses of thermally treated reciprocating instruments, but the instrumented area of root canals was reduced along with the repeated uses of both instruments.
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Affiliation(s)
| | | | | | | | - Erick Miranda Souza
- Department of Endodontics, Federal University of Maranhão, São Luiz, MA, Brazil
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11
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Kolhe SJ, Kolhe PS, Gulve MN, Aher GB, Bhadage CJ, Mashalkar SS. Microcomputed tomographic evaluation of shaping ability of two thermo mechanically treated single-file systems in severely curved roots. J Conserv Dent 2021; 23:244-248. [PMID: 33551593 PMCID: PMC7861081 DOI: 10.4103/jcd.jcd_349_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 07/26/2020] [Accepted: 08/25/2020] [Indexed: 11/24/2022] Open
Abstract
Context: Canal shaping abilities such as canal transportation, centering ability, and preparation time are important and have to be considered before using any Nickel–Titanium file system. Aim: This in vitro study aimed to evaluate and compare the amount of canal transportation, centering ability, and time required for the shaping of severely curved canals with WaveOne Gold (WOG) Primary Reciprocating file and One Curve (OC) Rotary file using the micro computed tomography (μCT). Materials and Methods: Thirty intact mesial roots of extracted human mandibular first molars having severe curvature (25°–35°) were selected. Samples were divided into two groups. Samples in Group I and II were shaped with WOG primary reciprocating files and OC rotary files, respectively, to the working length. Time required to prepare each canal was recorded. μCT pre- and post-instrumentation scans of all samples were taken. The cross-sectional images at 3, 6, and 9 mm from the radiographic apex were selected for analysis. Statistical analysis was performed using the Kruskal–Wallis and unpaired t-test. Results: At 3 mm, OC showed statistically lower canal transportation with mean value (0.17 ± 0.10) than WOG (0.55 ± 0.42). Furthermore, OC showed statistically significant better centering ability (0.59 ± 0.25) than WOG (0.39 ± 0.20) at 3 mm level. However, the differences between both instruments were not statistical significant at 6 and 9 mm level for canal transportation and centering ratio. WOG reciprocating file required less time for canal preparation than OC file. Conclusions: OC rotary file showed less canal transportation and better canal centring ability than WOG file, during the preparation of severely curved canals. However, WOG required less time for canal preparation.
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Affiliation(s)
- Swapnil J Kolhe
- Department of Conservative Dentistry and Endodontics, MGV's KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Priyanka S Kolhe
- Department of Conservative Dentistry and Endodontics, MGV's KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Meenal N Gulve
- Department of Conservative Dentistry and Endodontics, MGV's KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Gayatri B Aher
- Department of Conservative Dentistry and Endodontics, MGV's KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Chetan J Bhadage
- Department of Conservative Dentistry and Endodontics, MGV's KBH Dental College and Hospital, Nashik, Maharashtra, India
| | - Shailendra S Mashalkar
- Department of Conservative Dentistry and Endodontics, Al-Badar Dental College and Hospital, Gulbarga, Karnataka, India
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12
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Loureiro MAZ, Rossi-Fedele G, Amezcua OG, Souza POC, Silva JA, Estrela C, Decurcio DA. Dynamic torque analysis of rotary and reciprocating instruments during root canal instrumentation in simulated canals by an endodontist or a general dentist. J Conserv Dent 2021; 23:126-130. [PMID: 33384482 PMCID: PMC7720756 DOI: 10.4103/jcd.jcd_380_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 08/04/2020] [Accepted: 08/05/2020] [Indexed: 11/17/2022] Open
Abstract
Background: Excessive torque is associated with engine-driven file fracture. Aims: The aim of this study to evaluate the real-time torque of rotary and reciprocating instruments, working time, and the occurrence of procedural errors during root canal preparation of simulated canals by an endodontist and a general dentist. Methods: Thirty-six commercially available simulated “J-shaped” root canals in resin blocks were used. Instrumentation was performed using WaveOne, WaveOne Gold, ProTaper Next, Reciproc, Reciproc Blue, and Mtwo. The real-time torque analysis and the number of times the maximum torque applied to the instrument were evaluated. Images were obtained to assess the occurrence of procedural errors, and working time was recorded. Statistical Analysis: The one-way analysis of variance with a Bonferroni post hoc test, Mann Whitney test and the t-test was used for statistical analysis (P < 0.05). Results: Reciprocating instruments showed lower values in the number of times that reached maximum torque and percentage time in the area of critical torque, with significant differences compared to rotary instruments (P < 0.05). Operators influenced torque values only with rotary motion instruments. There was no significant difference in mean working time between the operators or instruments. No fracture of instruments or canal transportation occurred. Conclusions: Rotary instruments were associated with higher peaks in real-time torque variation during the preparation of simulated root canals.
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Affiliation(s)
- Marco Antonio Z Loureiro
- Department of Oral Science, School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Giampiero Rossi-Fedele
- Endodontic Discipline, Adelaide Dental School, University of Adelaide, Adelaide, South Australia, Australia
| | - Octavio G Amezcua
- Department of Endodontics, University Centre of Health Sciences, University of Guadalajara, Guadalajara, Mexico
| | - Paulo O Carmo Souza
- Department of Oral Science, School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Julio A Silva
- Department of Oral Science, School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Carlos Estrela
- Department of Oral Science, School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Daniel A Decurcio
- Department of Oral Science, School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
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13
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Lam MSH, Chang JWW, Cheung GSP. Ex vivo shaping ability of reciprocating instruments operated by new users: Reciproc versus WaveOne. Clin Oral Investig 2020; 25:2791-2799. [PMID: 33033922 DOI: 10.1007/s00784-020-03593-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 09/15/2020] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To compare two reciprocating NiTi systems operated by novices for use in curved root canals. METHODS Fifty mesial roots of extracted mandibular first molars, with 2-2 canal configuration, were scanned with micro-CT and divided into 2 groups according to canal length and curvature: Reciproc and WaveOne. Each system was used to prepare one of the two canals by fourth-year dental students, who were new to reciprocating files and were blinded to the system being used. After another scanning, the pre- and post-instrumentation images were compared 3-dimensionally in software. RESULTS Some 43 to 46% of the canal wall area remained un-instrumented. Significantly higher proportions of canals were transported towards the isthmus or furcation aspect than the mesial or external aspect. Mean transported distance was the greatest in the coronal one-third. Remaining dentine wall was the thinnest at the furcal aspect near the middle root region. No significant difference was noted between the two brands in the parameters examined. CONCLUSIONS Both brands of reciprocating file left similar amounts of un-instrumented canal wall, and resulted in similar extent of canal transportation. CLINICAL RELEVANCE NiTi reciprocating files can safely be used by new users to prepare curved root canals into a predictable shape.
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Affiliation(s)
- Mary S H Lam
- Department of Health, The Government of Hong Kong SAR, Hong Kong, Hong Kong
| | - Jeffrey W W Chang
- Division of Restorative Dental Sciences, Faculty of Dentistry, University of Hong Kong, PPDH, 34 Hospital Road, Pokfulam, Hong Kong, SAR
| | - Gary S P Cheung
- Division of Restorative Dental Sciences, Faculty of Dentistry, University of Hong Kong, PPDH, 34 Hospital Road, Pokfulam, Hong Kong, SAR.
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14
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Haupt F, Pult JRW, Hülsmann M. Micro–computed Tomographic Evaluation of the Shaping Ability of 3 Reciprocating Single-File Nickel-Titanium Systems on Single- and Double-Curved Root Canals. J Endod 2020; 46:1130-1135. [DOI: 10.1016/j.joen.2020.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 05/06/2020] [Accepted: 05/14/2020] [Indexed: 11/27/2022]
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15
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Assis RS, Lopes FC, Roperto R, Silva Sousa YTC, Brazão EH, Spazzin AO, Pereira GKR, Alves DM, Saquy PC, Sousa-Neto MD. Bond strength and quality of bond interface of multifilament fiberglass posts luted onto flat-oval root canals without additional dentin wear after biomechanical preparation. J Prosthet Dent 2020; 124:738.e1-738.e8. [PMID: 32694019 DOI: 10.1016/j.prosdent.2020.04.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 10/23/2022]
Abstract
STATEMENT OF PROBLEM An intraradicular retainer formed by multiple independent glass fiber filaments was developed aiming to allow better adaptation in flattened root canals; however, the performance of the new posts is unclear. PURPOSE The purpose of this in vitro study was to compare the bond strength (BS) and adhesive interface quality achieved in flattened root canals restored with conventional glass fiber posts (CFPs) and multifilament glass fiber posts (MFPs). MATERIAL AND METHODS The distal roots of mandibular molars with long oval root canals were endodontically treated, and the obturation material was removed and assigned to 2 groups (n=11) according to the type of retainer used: CFP (WhitePostDC#0.5; FGM) or MFP (CometTail#4; Synca). The posts were cemented with self-adhesive resin cement. The specimens were sectioned (2 slices per third). The most cervical slice in each third was used to evaluate the BS, while the adhesive interface in the apical slices was analyzed by scanning electron microscopy. BS data were analyzed by using a multilevel generalized linear model, and adhesive interface SEM data were analyzed by using a multilevel ordinal logistic regression model (α=.05). RESULTS Multilevel regression showed a statistically significant difference for the "type of retainer" factor (P=.001; CFP 2.61 ±1.30>MFP 1.59 ±1.54). No statistically significant differences were found for the "root thirds" factor (P=.346) or for the interaction of both factors (P=.114). The failure pattern was predominantly mixed or adhesive for CFP and adhesive to dentin for MFP. A better adaptation of the restorative material was observed in the cervical third for CFP and in the apical third for MFP (P<.001). CONCLUSIONS MFP resulted in lower BS values than CFP, with a higher prevalence of adhesive failures to dentin and better adaptation of the adhesive interface in the apical third.
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Affiliation(s)
- Rafael S Assis
- Postgraduate student, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Fabiane Carneiro Lopes
- Postgraduate student, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Renato Roperto
- Professor, Department of Comprehensive Care, School of Dental Medicine, Case Western Reserve University, Cleveland, Ohio
| | | | - Elisabeth Helena Brazão
- Postgraduate student, School of Dentistry, University of Ribeirão Preto (UNAERP), Ribeirão Preto, SP, Brazil
| | - Aloísio O Spazzin
- Professor, School of Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil
| | - Gabriel K R Pereira
- Professor, School of Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil
| | - Daniela Meira Alves
- Postgraduate student, School of Dentistry, Meridional Faculty (IMED), Passo Fundo, RS, Brazil
| | - Paulo César Saquy
- Professor, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil
| | - Manoel Damião Sousa-Neto
- Professor, Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, São Paulo, Brazil.
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16
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Borges CC, Estrela C, Decurcio DDA, PÉcora JD, Sousa-Neto MD, Rossi-Fedele G. Cone-beam and micro-computed tomography for the assessment of root canal morphology: a systematic review. Braz Oral Res 2020; 34:e056. [PMID: 32578799 DOI: 10.1590/1807-3107bor-2020.vol34.0056] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Accepted: 04/14/2020] [Indexed: 11/21/2022] Open
Abstract
This study presents an overview of the accuracy of cone beam computed tomography (CBCT) compared with micro-computed tomography (μCT) in the assessment of root canal morphology of extracted human permanent teeth. A database search in PubMed, PubMed Central, Embase, Scopus, Opengrey, Scielo and Virtual Health Library was conducted which compared root canal morphology of extracted human permanent teeth on the accuracy of CBCT with μCT. In accordance with PRISMA statement guidelines, data were extracted on study characteristics, target mediators, sampling and assay techniques and the parameters associated with obtaining the image and ability to identify the root canal morphology. Amongst 2734 records, ten fulfilled the inclusion criteria. Four studies compared the accuracy of CBCT and μCT in the assessment of root canal morphology using Vertucci's classification, with at least one CBCT group or subgroup of each study presented high agreement compared to the μCT. Six studies assessed more detailed root canal morphology, including two articles that found a lack of agreement between these imaging systems. Risk of bias was deemed low in three studies, moderate in four and high in three. CBCT can be as accurate as μCT in the assessment of several morphological features of extracted human permanent teeth; however there are some exceptions related to the more detailed morphological aspects. Voxel size likely influences the ability to detect these features, though the different aspects of exposure setting used in studies components may be confounding factors. CBCT may be considered for the assessment of root canal morphology ex-vivo.
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Affiliation(s)
- Caroline Cristina Borges
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Carlos Estrela
- Universidade Federal de Goiás - UFG, Faculty of Dentistry, Department of Stomatological Sciences, Goiânia, Brazil
| | - Daniel de Almeida Decurcio
- Universidade Federal de Goiás - UFG, Faculty of Dentistry, Department of Stomatological Sciences, Goiânia, Brazil
| | - Jesus Djalma PÉcora
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
| | - Manoel Damião Sousa-Neto
- Universidade de São Paulo - USP, School of Dentistry of Ribeirão Preto, Department of Restorative Dentistry, Ribeirão Preto, SP, Brazil
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17
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Micoogullari Kurt S, Kaval ME, Serefoglu B, Kandemir Demirci G, Çalışkan MK. Cyclic fatigue resistance and energy dispersive X-ray spectroscopy analysis of novel heat-treated nickel-titanium instruments at body temperature. Microsc Res Tech 2020; 83:790-794. [PMID: 32170795 DOI: 10.1002/jemt.23469] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/25/2020] [Accepted: 02/22/2020] [Indexed: 11/12/2022]
Abstract
The aim of this study was to evaluate the cyclic fatigue resistance of Dia-X, WaveOne Gold and One Curve files in a water bath at intracanal temperature (35°C). Thirty-nine instruments Dia-X, WaveOne Gold, and One Curve systems (n = 13) were tested in an artificial canal with a curvature angle of 60° and a radius of 3 mm. A water bath setup at a temperature of 35°C was used to simulate the intracanal temperature and time to fracture (TTF) as seconds was recorded. The mean data were analyzed statistically using one-way ANOVA, and post hoc Tukey test (p = .05). The fractured surface of the instruments was examined with scanning electron microscopy (SEM) and chemical composition of the instruments were investigated with energy dispersive X-ray spectroscopy (EDS). Statistically significant differences were detected in TTF values of all the systems as follows: One Curve > WaveOne Gold > Dia-X (p < .05). One Curve instruments demonstrated the highest TTF values in all the tested instruments. The EDS microanalysis revealed similar NiTi composition of on the surface of One Curve, WaveOne Gold, and Dia-X instruments. The novel manufacturing process, including C-wire heat treatment and the variable cross-section of the One Curve files, could be the main factors affecting the fatigue life of the instruments.
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Affiliation(s)
| | - Mehmet Emin Kaval
- Department of Endodontology, Faculty of Dentistry, Ege University, İzmir, Turkey
| | - Burcu Serefoglu
- Department of Endodontology, Faculty of Dentistry, Ege University, İzmir, Turkey
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18
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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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