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Ahmad MZ. Assessment of Debris Extrusion in Curved Canals: An In Vitro Analysis of Various Single-File Endodontic Instrumentation Systems. Int J Dent 2024; 2024:8367693. [PMID: 39007058 PMCID: PMC11245337 DOI: 10.1155/2024/8367693] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Revised: 04/27/2024] [Accepted: 05/31/2024] [Indexed: 07/16/2024] Open
Abstract
Objectives Rotary single-file endodontic systems are commonly used for root canal treatment. However, very few studies have evaluated the apical extrusion of debris generated by these systems during canal preparation at normal body temperature in laboratory conditions. The aim of this study was to evaluate the amount of apically extruded debris caused by seven different single-file endodontic instrumentation systems at body temperature in mandibular molar teeth with curved root canals. Methods One hundred forty mandibular first permanent molars were randomly divided into seven groups (n = 20) to be prepared by one of the following systems at 35°C: Reciproc Blue (REC Blue), WaveOne Gold (WOG), One Reci (OR), Neoniti, HyFlex EDM (HEDM), One Curve (OC), or XP Shaper (XPS). Debris was collected into preweighted Eppendorf tubes. The weight of the extruded debris was recorded by subtracting the weight of the tooth-free apparatus from the post-procedure weight. Data were analyzed by one-way ANOVA and Tukey's tests (p < 5%). Results REC Blue, WOG, and OR groups extruded significantly more debris from the apex than XPS, OC, and Neoniti groups (p < 0.05). No significant difference was observed among the XPS, OC, Neoniti, and HEDM groups (p > 0.05). Conclusion All the instruments were associated with debris extrusion. However, REC Blue, WOG, and OR extrude significantly more debris than other instruments. The amount of debris with different files was REC Blue > OR > WOG > HEDM > OC > Neoniti > XPS. XPS, Neoniti, and OC caused significantly less extrusion of debris than REC Blue, WOG, and OR.
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Affiliation(s)
- Muhammad Zubair Ahmad
- Department of Conservative Dental Sciences College of Dentistry Qassim University, Buraydah 52571, Saudi Arabia
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2
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Abdelmomen I, Vincent M, Thiebaud F, Budzinski J, Bastogne T, Ben Zineb T, Engels-Deutsch M. Experimental Analysis of the Influence of Heat Treatments on the Flexibility of NiTi Alloy for Endodontic Instruments Manufacturing. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16093437. [PMID: 37176319 PMCID: PMC10180458 DOI: 10.3390/ma16093437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/17/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023]
Abstract
The flexibility of NiTi based endodontic files is improved by heat treatment, leading to lower risk of failure, ledges, and canal transportation during the preparation of curved root canals. The aim of this study is to investigate and clearly highlight the influence of every parameter of heat treatment on the flexibility of NiTi wires and thus of endodontic instruments. A full factorial Design of Experiment (DoE) and a designed bending-torsion bench following the ISO 3630-1 standard were used for this investigation. Temperature, holding time, and cooling method were selected as contributing factors, while maximum bending moment, hysteresis size, and stiffness during martensitic transformation were selected as outputs. Regression analysis was performed to estimate the relationship between contributing and output variables to assess how the experimentation fits with the model. The experimental results showed that wires heated at 425 °C for 30 min are more flexible. Moreover, heat treatment temperature is the most critical factor influencing the flexibility and hysteresis size of the NiTi wire followed by the holding time, while the cooling method has a negligible effect. The regression analysis showed that the model is effective at predicting the relationship between contributing factors, bending moment response, and hysteresis size.
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Affiliation(s)
| | - Marin Vincent
- Université de Lorraine, CNRS, LEM3, F-54000 Nancy, France
- Faculté d'Odontologie de Lorraine, Université de Lorraine, F-54000 Nancy, France
| | | | | | - Thierry Bastogne
- CYBERnano, F-54505 Nancy, France
- Université de Lorraine, CNRS, CRAN, F-54000 Nancy, France
| | | | - Marc Engels-Deutsch
- Université de Lorraine, CNRS, LEM3, F-54000 Nancy, France
- Faculté d'Odontologie de Lorraine, Université de Lorraine, F-54000 Nancy, France
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3
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What meaningful information are the instruments mechanical testing giving us? A comprehensive review. J Endod 2022; 48:985-1004. [PMID: 35667567 DOI: 10.1016/j.joen.2022.05.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/21/2022] [Accepted: 05/26/2022] [Indexed: 11/22/2022]
Abstract
Instruments mechanical strength and flexibility are traditionally tested by running cyclic fatigue, torsional, bending, buckling and microhardness tests. Several cyclic fatigue test models have been used in endodontics, all capable of providing a curved trajectory for the instrument to rotate. The cyclic fatigue testing allowed to identify conditions that may affect the fatigue strength outcomes, such as canal radius and degree of curvature, handpiece static vs dynamic motions, test temperature, kinematics, instrument previously wear and sterilization cycles, or instrument's size and metal alloy features. Due to the international test specifications for both torsional and bending tests, the variations of their models are not as many as for cyclic fatigue. These tests have also identified conditions capable of affecting the outcomes, such as kinematics, instrument's preloading, cross-sectional diameters, or alloy heat treatments. Buckling and microhardness are less common, with the metal alloy being considered to have a major influence on the results. Instruments mechanical testing, having all these individual conditions as independent variables, allowed to understand them and moulded the way the technical procedures are performed clinically. Even though the artificiality and simplicity of these tests will hardly mimic real working situations, and independently of being capable of producing cornerstone knowledge, these tests are also associated with inconsistency, lack of reproducibility and low external validity. Several attempts have been made to increase the generalizability of the outcomes by adding test settings that intend to mimic the clinical condition. Although pertinent, these settings may also add variabilities inherent to their concepts and practical applications in the laboratory environment. Although the actual studies should be seen as laboratory mechanical tests that measure very specific parameters under very particular conditions and that by far do not mimic the clinical condition, the lower validity drawback seems to be possible to be minimized when achieving a comprehensive understanding of the instrument behaviour. A Finite Elements Method and/or a multimethod research approach may lead to superior data collection, analysis, and results' interpretation, which when associated with a reliable confounding factors control and proper study designs may be helpful tools and strategies in order to increase the reliability of the outcomes.
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4
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Abstract
A very extensive literature review presents the possibilities and needs of using, in endodontics, the alloys commonly known as nitinol. Nitinol, as the most modern group of engineering materials used to develop root canals, is equilibrium nickel and titanium alloys in terms of the elements’ atomic concentration, or very similar. The main audience of this paper is engineers, tool designers and manufacturers, PhD students, and students of materials and manufacturing engineering but this article can also certainly be used by dentists. The paper aims to present a full material science characterization of the structure and properties of nitinol alloys and to discuss all structural phenomena that determine the performance properties of these alloys, including those applied to manufacture the endodontic tools. The paper presents the selection of these alloys’ chemical composition and processing conditions and their importance in the endodontic treatment of teeth. The results of laboratory studies on the analysis of changes during the sterilization of endodontic instruments made of nitinol alloys are also included. The summary of all the literature analyses is an SWOT analysis of strengths, weaknesses, opportunities, and threats, and is a forecast of the development strategy of this material in a specific application such as endodontics.
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5
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Retreatment of Experimental Carrier-Based Obturators with the Remover NiTi Instrument: Evaluation of Apical Extrusion and Effects of New Kinematics. Int J Dent 2021; 2021:2755680. [PMID: 34725547 PMCID: PMC8557051 DOI: 10.1155/2021/2755680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 10/06/2021] [Indexed: 11/21/2022] Open
Abstract
The objective of this study is to evaluate the retreatment time and weight of apically extruded debris yielded by two different kinematics during the removal of different root canal filling materials. Forty straight single-rooted extracted teeth were instrumented with HyFlex CM files and obturated with two different techniques: 25.04 HyFlex experimental carrier-based obturators (Coltène/Whaledent, Altstätten, Switzerland) (group 1) or 25.04 single gutta-percha cones (Roeko Coltène/Whaledent, Altstätten, Switzerland) (group 2) and Guttaflow Bioseal as the sealer. Samples were divided into four subgroups (n = 10) according to the used kinematics for the removal of root canal filling materials: continuous rotation (A) or retreatment motion (B) with a Remover and HyFlex EDM Nickel-Titanium instruments activated with a CanalPro Jeni micromotor (Coltène/Whaledent, Altstätten, Switzerland). Time for retreatment was digitally recorded, and debris extruded from the apex was collected in Eppendorf tubes and weighted with an analytical balance. Data on retreatment time and apical extrusion were statistically analyzed with the Kruskal–Wallis test (p < 0.05). Working length was achieved in all the retreated samples. The removal of root filling material resulted significantly faster with the Jeni mode (p < 0.001), and the difference was significant for the removal of both filling materials (p < 0.05). No significant differences on debris extrusion between single cone and experimental obturators groups were noted (p > 0.05), and no significant differences between kinematics (continuous rotation vs. Jeni motion) were observed (p > 0.05). All the tested retreatment strategies lead to an extrusion of material from the apex, and the weight of apically extruded debris was similar. The use of the innovative CanalPro Jeni kinematics accelerates the time for the removal of root filling materials.
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6
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Chi D, Zhang Y, Lin X, Tong Z. Cyclic fatigue resistance for six types of nickel titanium instruments at artificial canals with different angles and radii of curvature. Dent Mater J 2021; 40:1129-1135. [PMID: 34121024 DOI: 10.4012/dmj.2020-358] [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] [Indexed: 11/23/2022]
Abstract
This study evaluated the cyclic fatigue resistance for six types of 25# NiTi instruments. A traditional manufacturing instrument, an M wire instrument, a gold treatment instrument, a controlled memory (CM) wire instrument, a CM wire instrument with electrical discharge machining (EDM), and an R-phase heat treatment instrument, were operated in the different curved artificial canals. The fracture time (FT) and number of cycles to fracture (NCF) of the NiTi instruments were higher at 45° angles and double-curvature canals than at 60° angles. Except for the instruments with gold technology and EDM technology, others showed the longest FT and the highest NCF at an 8 mm radius of curvature. Morphological characteristics of cyclic fatigue were exhibited on the cross-section and lateral view of fracture fragments. The use of M-wire, R-phase wire, CM-wire, gold technology, EDM technology, and reciprocating movement were beneficial to enhance the cyclic fatigue resistance of NiTi files.
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Affiliation(s)
- Danlu Chi
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University
| | - Yuejiao Zhang
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University
| | - Xinwei Lin
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University
| | - Zhongchun Tong
- Hospital of Stomatology, Guanghua School of Stomatology, Sun Yat-sen University.,Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-sen University
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7
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Campos DS, Rodrigues EA, Bueno CEDS, Fontana CE, da Silva EJNL, de Lima CO, De Martin AS. The ability of reciprocating glide path instruments to reach the full root canal working length. AUST ENDOD J 2021; 47:487-492. [PMID: 33754413 DOI: 10.1111/aej.12510] [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] [Accepted: 03/07/2021] [Indexed: 11/30/2022]
Abstract
This study evaluated the ability of reciprocating glide path instruments to reach the full working length (RFWL). Thirty mesial roots of mandibular molars were matched into 2 groups (n = 15 teeth, 30 root canals), according to the system used for glide path: WaveOne Gold Glider (WOGG) and R-Pilot. The samples with fractured instruments or when it was not possible to RFWL were scanned using micro-computed tomography. Fractured instruments were also visualised through a scanning electron microscopy to verify the type of fracture. The parameters were compared statistically by Fisher's and chi-square tests (P < 0.05). No instrument fractures were observed in the R-pilot, while 2 fractures occurred in the WOGG group (P > 0.05). RFLW was achieved in 29 canals (96.66%) and 28 canals (93.33%) with R-pilot and WOGG instruments, respectively (P > 0.05). The instruments are able to RFWL in mesial canals of mandibular molars. WOGG showed two fractures while no R-Pilot instruments fractured.
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Affiliation(s)
- Daniel Souza Campos
- Department of Endodontics, School of Dentistry, São Leopoldo Mandic Faculty, Campinas, Brazil
| | - Evaldo Almeida Rodrigues
- Department of Endodontics, School of Dentistry, State University of Feira de Santana (UEFS), Feira de Santana, Brazil
| | | | - Carlos Eduardo Fontana
- Department of Endodontics, School of Dentistry, São Leopoldo Mandic Faculty, Campinas, Brazil
| | - Emmanuel João Nogueira Leal da Silva
- Department of Endodontics, School of Dentistry, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil.,Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - Carolina Oliveira de Lima
- Department of Endodontics, School of Dentistry, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
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8
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Ribeiro Camargo CH, Bittencourt TS, Hasna AA, Palo RM, Talge Carvalho CA, Valera MC. Cyclic fatigue, torsional failure, and flexural resistance of rotary and reciprocating instruments. J Conserv Dent 2021; 23:364-369. [PMID: 33623237 PMCID: PMC7883783 DOI: 10.4103/jcd.jcd_409_20] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/09/2020] [Accepted: 10/15/2020] [Indexed: 11/04/2022] Open
Abstract
Aim The aim was to compare cyclic fatigue, torsional failure, and flexural resistance of NiTi endodontic files: Hyflex CM (HYF), Genius files (GEN), WaveOne Gold (WOG), and ProTaper Universal (PTU). Materials and Methods Fifteen files of each brand were used in cyclic fatigue test and other fifteen files for flexural test and torsional failure test. To the cyclic fatigue test, used torque limit and revolutions per minute were set according to the respective manufacturer guidelines. The test was performed under deionized water at 36°C, and all files were tested in a 3 mm radius of curvature with an angle of curvature of 60°, time of the fracture was recorded. Torsional fatigue test was performed in the torsional machine (Instron MT, USA), recording the fractured time and torque data by the machine software. Flexural fatigue test was performed in 60° of curvature. All data were statistically analyzed by one-way analysis of variance, and Tukey test for multiple comparisons. Results Cyclic fatigue (seconds)= HYF: 744.1 ± 231.9/GEN: 477.3 ± 220.5/WO: 278.4 ± 57.0/PTU: 152.4 ± 65.2; torsional failure (N × cm)= HYF: 6.85 ± 1.484/GEN: 6.55 ± 0.828/WOG: 5.73 ± 0.360/PTU: 4.43 ± 0.900; flexural resistance (N × mm)= HYF: 0.33 ± 0.294/GEN: 0.19 ± 0.136/WOG: 0.98 ± 0.216/PTU: 1.85 ± 0.276. Conclusion HYF and GEN showed the best results for cyclic fatigue, torsional failure, and flexural resistance, followed by WOG and PTU.
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Affiliation(s)
| | - Tatiane Sampaio Bittencourt
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, Sao Paulo State University - UNESP; São José Dos Campos, São Paulo, Brazil
| | - Amjad Abu Hasna
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, Sao Paulo State University - UNESP; São José Dos Campos, São Paulo, Brazil
| | - Renato Miotto Palo
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, Sao Paulo State University - UNESP; São José Dos Campos, São Paulo, Brazil
| | - Cláudio Antonio Talge Carvalho
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, Sao Paulo State University - UNESP; São José Dos Campos, São Paulo, Brazil
| | - Marcia Carneiro Valera
- Department of Restorative Dentistry, Endodontic Division, Institute of Science and Technology, Sao Paulo State University - UNESP; São José Dos Campos, São Paulo, Brazil
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9
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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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10
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Lopes WSP, Vieira VTL, Silva EJNL, Silva MCD, Alves FRF, Lopes HP, Pires FR. Bending, buckling and torsional resistance of rotary and reciprocating glide path instruments. Int Endod J 2020; 53:1689-1695. [PMID: 32767775 DOI: 10.1111/iej.13385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/31/2020] [Accepted: 08/04/2020] [Indexed: 11/27/2022]
Abstract
AIM To evaluate the bending, buckling and torsional resistance of ProGlider (PG) (Dentsply Sirona, Ballaigues, Switzerland), R-Pilot (RP) (VDW, Munich, Germany) and WaveOne Gold Glider (WOGG) (Dentsply Sirona). METHODOLOGY Ninety instruments were used: 30 PG (size 0.16, .02v taper), 30 RP (size 0.125, .04 taper) and 30 WOGG (size 0.15, .02v taper). The bending resistance test was performed on 10 randomly selected instruments of each system according to ISO 3630-1 specifications. For the buckling resistance test, a loading was applied in the axial direction of each instrument using a universal test machine, with a 20 N cell and 15 mm min-1 speed, in the axial direction. When a lateral elastic displacement of 1 mm occurred, the force was registered. The torsional resistance test was performed according to ISO 3630-1 specifications. Statistical analysis was performed using one-way anova and post hoc Student-Newman-Keuls test (P < 0.05). RESULTS WOGG had the lowest bending resistance, whilst RP had the highest bending resistance (P < 0.05). RP also had the highest buckling resistance, and WOGG had the lowest (P < 0.05). PG had intermediate results regarding bending and buckling resistance, with significant differences to RP and WOGG (P < 0.05). RP had the highest torsional strength and the lowest angular deflection when compared to PG and WOGG (P < 0.05). No differences in the torsional strength and angular deflection were observed between WOGG and PG (P> 0.05). CONCLUSION The glide path instruments had different behaviours in term of bending, buckling and torsional resistance.
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Affiliation(s)
- W S P Lopes
- Department of Endodontics, School of Dentistry, UNESA - Estácio de Sá University, Rio de Janeiro, Brazil
| | - V T L Vieira
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - E J N L Silva
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - M C D Silva
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - F R F Alves
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - H P Lopes
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - F R Pires
- Department of Endodontics, School of Dentistry, UNESA - Estácio de Sá University, Rio de Janeiro, Brazil
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11
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Bueno CSP, Oliveira DP, Pelegrine RA, Fontana CE, Rocha DGP, Gutmann JL, Bueno CES. Fracture incidence of WaveOne Gold files: a prospective clinical study. Int Endod J 2020; 53:1192-1198. [PMID: 32573799 DOI: 10.1111/iej.13349] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 06/15/2020] [Accepted: 06/16/2020] [Indexed: 11/28/2022]
Abstract
AIM This prospective clinical study evaluated the incidence of instrument fracture observed after single-file root canal treatment of molars using WaveOne Gold instruments. METHODOLOGY Three standardized, experienced and calibrated specialists treated 750 maxillary and mandibular molars with curvatures less than 45° (2691 root canals) over a 12-month period. All the treatments were performed in a single session. A total of 1104 WaveOne Gold instruments were used, including 38 small, 750 primary, 228 medium and 88 large instruments. Intracanal procedures were performed according to the manufacturer's recommendations, and each instrument was used in a single clinical case. The instruments were examined after their removal from the canal, under an operating microscope at 8× magnification. RESULTS No fractures were observed in any of the 1104 instruments used. CONCLUSIONS No fractures of WaveOne Gold reciprocating instruments occurred during root canal preparations performed in maxillary and mandibular molars with curvatures less than 45° when used strictly according to the manufacturer's recommendations and applied in a single clinical case.
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Affiliation(s)
- C S P Bueno
- Faculdade São Leopoldo Mandic, Endodontia, Instituto de Pesquisas São Leopoldo Mandic, Campinas, SP, Brazil
| | - D P Oliveira
- Faculdade São Leopoldo Mandic, Endodontia, Instituto de Pesquisas São Leopoldo Mandic, Campinas, SP, Brazil
| | - R A Pelegrine
- Faculdade São Leopoldo Mandic, Endodontia, Instituto de Pesquisas São Leopoldo Mandic, Campinas, SP, Brazil
| | - C E Fontana
- Department of Endodontics, School of Dentistry, Pontifical Catholic University of Campinas, Campinas, SP, Brazil
| | - D G P Rocha
- Faculdade São Leopoldo Mandic, Endodontia, Instituto de Pesquisas São Leopoldo Mandic, Campinas, SP, Brazil.,Department of Endodontics, School of Dentistry, Pontifical Catholic University of Campinas, Campinas, SP, Brazil
| | - J L Gutmann
- Department of Endodontics, School of Dentistry, Pontifical Javeriana University, Bogotá, Colombia
| | - C E S Bueno
- Faculdade São Leopoldo Mandic, Endodontia, Instituto de Pesquisas São Leopoldo Mandic, Campinas, SP, Brazil
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12
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Generali L, Puddu P, Borghi A, Brancolini S, Lusvarghi L, Bolelli G, Consolo U, Pedullà E. Mechanical properties and metallurgical features of new and
ex vivo
used Reciproc Blue and Reciproc. Int Endod J 2019; 53:250-264. [DOI: 10.1111/iej.13214] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/30/2019] [Indexed: 11/26/2022]
Affiliation(s)
- L. Generali
- Department of Surgery, Medicine Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance (CHIMOMO) University of Modena and Reggio Emilia Modena Italy
| | - P. Puddu
- Department of Engineering “Enzo Ferrari” (DIEF) University of Modena and Reggio Emilia Modena Italy
| | - A. Borghi
- Department of Surgery, Medicine Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance (CHIMOMO) University of Modena and Reggio Emilia Modena Italy
| | - S. Brancolini
- Department of Surgery, Medicine Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance (CHIMOMO) University of Modena and Reggio Emilia Modena Italy
| | - L. Lusvarghi
- Department of Engineering “Enzo Ferrari” (DIEF) University of Modena and Reggio Emilia Modena Italy
| | - G. Bolelli
- Department of Engineering “Enzo Ferrari” (DIEF) University of Modena and Reggio Emilia Modena Italy
| | - U. Consolo
- Department of Surgery, Medicine Dentistry and Morphological Sciences with Transplant Surgery, Oncology and Regenerative Medicine Relevance (CHIMOMO) University of Modena and Reggio Emilia Modena Italy
| | - E. Pedullà
- Department of General Surgery and Surgical‐Medical Specialties University of Catania Catania Italy
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13
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Silva EJNL, Giraldes JFN, de Lima CO, Vieira VTL, Elias CN, Antunes HS. Influence of heat treatment on torsional resistance and surface roughness of nickel‐titanium instruments. Int Endod J 2019; 52:1645-1651. [DOI: 10.1111/iej.13164] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 05/22/2019] [Indexed: 12/16/2022]
Affiliation(s)
- E. J. N. L. Silva
- Department of Endodontics School of Dentistry Grande Rio University (UNIGRANRIO)Rio de Janeiro RJBrazil
| | - J. F. N. Giraldes
- Department of Endodontics School of Dentistry Grande Rio University (UNIGRANRIO)Rio de Janeiro RJBrazil
| | - C. O. de Lima
- Department of Endodontics School of Dentistry State University of Rio de Janeiro (UERJ)Rio de Janeiro RJBrazil
| | - V. T. L. Vieira
- Department of Endodontics School of Dentistry Grande Rio University (UNIGRANRIO)Rio de Janeiro RJBrazil
| | - C. N. Elias
- Materials Science Department Instituto Militar de Engenharia Rio de Janeiro RJ Brazil
| | - H. S. Antunes
- Department of Endodontics School of Dentistry Grande Rio University (UNIGRANRIO)Rio de Janeiro RJBrazil
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14
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Comparison of In Vitro Torque Generation during Instrumentation with Adaptive Versus Continuous Movement. J Endod 2019; 45:803-807. [DOI: 10.1016/j.joen.2019.02.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 02/01/2019] [Accepted: 02/05/2019] [Indexed: 11/23/2022]
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15
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Garcia PR, Resende PD, Lopes NIA, Peixoto IFDC, Buono VTL, Viana ACD. Structural Characteristics and Torsional Resistance Evaluation of WaveOne and WaveOne Gold Instruments after Simulated Clinical Use. J Endod 2019; 45:1041-1046. [PMID: 31155300 DOI: 10.1016/j.joen.2019.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 04/11/2019] [Accepted: 04/18/2019] [Indexed: 10/26/2022]
Abstract
INTRODUCTION The aim of this study was to compare 2 reciprocating nickel-titanium systems with different manufacturing characteristics and to evaluate the influence of simulated clinical use on their torsional resistance. METHODS New 25/.08 WaveOne Primary (WO; Dentsply Sirona, York, PA) and 25/.07 WaveOne Gold Primary (Dentsply Sirona) files were used in this study. The diameter and cross-sectional area at 3 mm from the tip were measured using image analyses. The alloy microstructure was evaluated by X-ray diffraction and the phase transformation temperatures by differential scanning calorimetry analyses. Forty files were divided into 4 groups: control group 1 and control group 2, which were submitted to torsion tests until rupture, and experimental group 1 and experimental group 2, in which instruments were used to shape 2 mesial canals of an extracted mandibular molar and then submitted to torsion tests until rupture. RESULTS WO had higher values of diameter and area at 3 mm from the tip. X-ray diffraction analysis presented R-phase and austenite for both systems. Austenite finish temperatures, determined by differential scanning calorimetry, were above room temperature. WO showed higher values of torque until rupture, and WaveOne Gold showed higher values of angular deflexion (P > .05). No differences were found between the same type of instrument in the control and experimental groups. CONCLUSIONS The higher torsional resistance of WO can be attributed to geometric characteristics. The use in 1 tooth with curved canals is safe and does not affect the torsional resistance of the instruments analyzed.
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Affiliation(s)
- Paula Ribeiro Garcia
- Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
| | - Pedro Damas Resende
- Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Natalia Isabel Azevedo Lopes
- Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Isabella Faria da Cunha Peixoto
- Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Vicente Tadeu Lopes Buono
- Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Ana Cecília Diniz Viana
- Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
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Fangli T, Maki K, Kimura S, Nishijo M, Tokita D, Ebihara A, Okiji T. Assessment of mechanical properties of WaveOne Gold Primary reciprocating instruments. Dent Mater J 2019; 38:490-495. [PMID: 31068550 DOI: 10.4012/dmj.2018-203] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
This study aimed to evaluate cyclic fatigue resistance and bending properties and torque/force generation of WaveOne Gold (WOG) Primary in comparison with WaveOne (WO) Primary and Reciproc (RE) R25. A cyclic fatigue test revealed that the WOG Primary took significantly longer time to fracture compared with the WO Primary (p<0.05). The WOG Primary had the smallest load values at a deflection of 0.5 and 2 mm (p<0.05), as measured with a cantilever bending test. Torque/force measurement demonstrated that maximum upward force and maximum counterclockwise torque values in the WOG Primary were significantly lower than those in the RE R25 (p<0.05). Under the present experimental condition, the WOG Primary showed a higher cyclic fatigue resistance compared with the WO Primary, a higher flexibility compared with the WO Primary and RE R25, and generated a significantly lower maximum torque compared with the RE R25.
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Affiliation(s)
- Tong Fangli
- Endodontic Department, Stomatological Hospital of Southern Medical University.,Department of Pulp Biology and Endodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU)
| | - Keiichiro Maki
- Department of Pulp Biology and Endodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU)
| | - Shunsuke Kimura
- Department of Pulp Biology and Endodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU)
| | - Miki Nishijo
- Department of Pulp Biology and Endodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU)
| | - Daisuke Tokita
- Department of Pulp Biology and Endodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU)
| | - Arata Ebihara
- Department of Pulp Biology and Endodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU)
| | - Takashi Okiji
- Department of Pulp Biology and Endodontics, Division of Oral Health Sciences, Graduate School of Medical and Dental Science, Tokyo Medical and Dental University (TMDU)
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Stringheta CP, Bueno CES, Kato AS, Freire LG, Iglecias EF, Santos M, Pelegrine RA. Micro‐computed tomographic evaluation of the shaping ability of four instrumentation systems in curved root canals. Int Endod J 2019; 52:908-916. [DOI: 10.1111/iej.13084] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 01/23/2019] [Indexed: 11/28/2022]
Affiliation(s)
- C. P. Stringheta
- Department of Endodontics São Leopoldo Mandic Dental Research Center CampinasSP Brazil
| | - C. E. S. Bueno
- Department of Endodontics São Leopoldo Mandic Dental Research Center CampinasSP Brazil
| | - A. S. Kato
- Department of Endodontics São Leopoldo Mandic Dental Research Center CampinasSP Brazil
| | - L. G. Freire
- Division of Endodontics Department of Restorative Dentistry School of Dentistry University of São Paulo São Paulo SP Brazil
| | - E. F. Iglecias
- Division of Endodontics Department of Restorative Dentistry School of Dentistry University of São Paulo São Paulo SP Brazil
| | - M. Santos
- Division of Endodontics Department of Restorative Dentistry School of Dentistry University of São Paulo São Paulo SP Brazil
| | - R. A. Pelegrine
- Department of Endodontics São Leopoldo Mandic Dental Research Center CampinasSP Brazil
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18
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Santos CB, Simões‐Carvalho M, Perez R, Vieira VTL, Antunes HS, Cavalcante DF, De‐Deus G, Silva EJNL. Torsional fatigue resistance of R‐Pilot and WaveOne Gold Glider NiTi glide path reciprocating systems. Int Endod J 2019; 52:874-879. [DOI: 10.1111/iej.13068] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Accepted: 12/21/2018] [Indexed: 11/30/2022]
Affiliation(s)
- C. B. Santos
- Department of Endodontics Fluminense Federal University (UFF) NiteróiBrazil
| | - M. Simões‐Carvalho
- Department of Endodontics Fluminense Federal University (UFF) NiteróiBrazil
| | - R. Perez
- Department of Endodontics Fluminense Federal University (UFF) NiteróiBrazil
| | - V. T. L. Vieira
- Department of Endodontics School of Dentistry Grande Rio University (UNIGRANRIO) Rio de Janeiro Brazil
| | - H. S. Antunes
- Department of Endodontics School of Dentistry Grande Rio University (UNIGRANRIO) Rio de Janeiro Brazil
| | - D. F. Cavalcante
- Department of Endodontics Fluminense Federal University (UFF) NiteróiBrazil
| | - G. De‐Deus
- Department of Endodontics Fluminense Federal University (UFF) NiteróiBrazil
| | - E. J. N. L. Silva
- Department of Endodontics Fluminense Federal University (UFF) NiteróiBrazil
- Department of Endodontics School of Dentistry Grande Rio University (UNIGRANRIO) Rio de Janeiro Brazil
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19
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Gavini G, Santos MD, Caldeira CL, Machado MEDL, Freire LG, Iglecias EF, Peters OA, Candeiro GTDM. Nickel-titanium instruments in endodontics: a concise review of the state of the art. Braz Oral Res 2018; 32:e67. [PMID: 30365608 DOI: 10.1590/1807-3107bor-2018.vol32.0067] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 06/11/2018] [Indexed: 11/22/2022] Open
Abstract
The introduction of automated instrumentation in endodontics represented a major advance in progress for this specialty, with improvements in the quality and predictability of root canal preparation and a significant reduction in procedural errors. In recent years, endodontic instruments have undergone a series of changes brought about by modifications in design, surface treatments, and thermal treatments. In addition, new movements have also been incorporated to offer greater safety and efficiency, optimizing the properties of the NiTi alloy, especially through eccentric rotary motion. An understanding of the mechanical properties of these new NiTi instruments and their effect on the clinical performance of root canal preparation is essential if dental practitioners are to select the instruments that provide optimal clinical outcomes, especially in curved or flattened canals. The objective of this literature review is to present and discuss the characteristics of the NiTi alloys used in the major instrumentation systems available in the market, as well as the influence of the metallurgical and mechanical properties of NiTi instruments and the movements that drive them, to enable more accurate and predictable planning of root canal preparation.
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Affiliation(s)
- Giulio Gavini
- Universidade de São Paulo - USP, School of Dentistry, Discipline of Endodontics, São Paulo, SP, Brazil
| | - Marcelo Dos Santos
- Universidade de São Paulo - USP, School of Dentistry, Discipline of Endodontics, São Paulo, SP, Brazil
| | - Celso Luis Caldeira
- Universidade de São Paulo - USP, School of Dentistry, Discipline of Endodontics, São Paulo, SP, Brazil
| | | | - Laila Gonzales Freire
- Universidade de São Paulo - USP, School of Dentistry, Discipline of Endodontics, São Paulo, SP, Brazil
| | - Elaine Faga Iglecias
- Universidade de São Paulo - USP, School of Dentistry, Discipline of Endodontics, São Paulo, SP, Brazil
| | - Ove Andrea Peters
- University of the Pacific, Arthur A. Dugoni School of Dentistry, Department of Endodontics, San Francisco, CA, United States
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20
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Boijink D, Costa DD, Hoppe CB, Kopper PMP, Grecca FS. Apically Extruded Debris in Curved Root Canals Using the WaveOne Gold Reciprocating and Twisted File Adaptive Systems. J Endod 2018; 44:1289-1292. [DOI: 10.1016/j.joen.2018.04.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 04/03/2018] [Accepted: 04/18/2018] [Indexed: 10/28/2022]
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21
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Topçuoğlu HS, Demirbuga S, Düzgün S, Topçuoğlu G. Cyclic fatigue resistance of new reciprocating files (Reciproc Blue, WaveOne Gold, and SmartTrack) in two different curved canals. ACTA ACUST UNITED AC 2018; 9:e12344. [PMID: 29863315 DOI: 10.1111/jicd.12344] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 03/31/2018] [Indexed: 11/30/2022]
Abstract
AIM In the present study, we compared the cyclic fatigue resistance (CFR) of Reciproc Blue, WaveOne Gold, and SmartTrack files in curved artificial canals. METHODS Ninety new Reciproc Blue R25, WaveOne Gold Primary, and SmartTrack X1 files were tested in artificial canals with 45° and 60° angles of curvature. CFR was determined by recording the time to fracture in the artificial canals. Two-way analysis of variance was used to analyze the data. RESULTS In the canal with a 45° angle of curvature, no significant differences were observed amongst Reciproc Blue, WaveOne Gold, and SmartTrack (P > .05). In the canal with a 60° angle of curvature, Reciproc Blue and SmartTrack had a greater CFR than WaveOne Gold (P < .05); there was no significant difference between the Reciproc Blue and SmartTrack files (P > .05). CONCLUSION The results of the present study showed that Reciproc Blue and SmartTrack files exhibited greater CFR than WaveOne Gold only in canals with a 60° angle of curvature.
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Affiliation(s)
| | - Sezer Demirbuga
- Department of Restorative Dentistry, Faculty of Dentistry, Erciyes University, Kayseri, Turkey
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22
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Shaping ability of reciprocating single-file systems in severely curved canals: WaveOne and Reciproc versus WaveOne Gold and Reciproc blue. Odontology 2018; 107:96-102. [DOI: 10.1007/s10266-018-0364-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 05/06/2018] [Indexed: 10/16/2022]
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Zupanc J, Vahdat-Pajouh N, Schäfer E. New thermomechanically treated NiTi alloys - a review. Int Endod J 2018; 51:1088-1103. [DOI: 10.1111/iej.12924] [Citation(s) in RCA: 166] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 03/16/2018] [Indexed: 11/29/2022]
Affiliation(s)
- J. Zupanc
- Department of Periodontology and Operative Dentistry; Westphalian Wilhelms-University; Münster Germany
| | - N. Vahdat-Pajouh
- Department of Periodontology and Operative Dentistry; Westphalian Wilhelms-University; Münster Germany
| | - E. Schäfer
- Central Interdisciplinary Ambulance in the School of Dentistry; Münster Germany
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Özyürek T, Uslu G, Gündoğar M, Yılmaz K, Grande NM, Plotino G. Comparison of cyclic fatigue resistance and bending properties of two reciprocating nickel-titanium glide path files. Int Endod J 2018; 51:1047-1052. [DOI: 10.1111/iej.12911] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 02/19/2018] [Indexed: 11/30/2022]
Affiliation(s)
- T. Özyürek
- Department of Endodontics; Faculty of Dentistry; Ondokuz Mayıs University; Samsun Turkey
| | - G. Uslu
- Private Practice, Dental Clinic; Çanakkale Turkey
| | - M. Gündoğar
- Department of Endodontics; Faculty of Dentistry; Medipol University; İstanbul Turkey
| | - K. Yılmaz
- Çorum Oral and Dental Health Centre; Çorum Turkey
| | - N. M. Grande
- Department of Endodontics; Catholic University of Sacred Heart; Rome Italy
| | - G. Plotino
- Private Practice, Grande Plotino & Torsello - Studio di Odontoiatria; Rome Italy
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25
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Özyürek T, Yılmaz K, Uslu G, Plotino G. The effect of root canal preparation on the surface roughness of WaveOne and WaveOne Gold files: atomic force microscopy study. Restor Dent Endod 2018; 43:e10. [PMID: 29487840 PMCID: PMC5816987 DOI: 10.5395/rde.2018.43.e10] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 01/09/2018] [Indexed: 12/04/2022] Open
Abstract
Objectives To examine the surface topography of intact WaveOne (WO; Dentsply Sirona Endodontics) and WaveOne Gold (WOG; Dentsply Sirona Endodontics) nickel-titanium rotary files and to evaluate the presence of alterations to the surface topography after root canal preparations of severely curved root canals in molar teeth. Materials and Methods Forty-eight severely curved canals of extracted molar teeth were divided into 2 groups (n = 24/each group). In group 1, the canals were prepared using WO and in group 2, the canals were prepared using WOG files. After the preparation of 3 root canals, instruments were subjected to atomic force microscopy analysis. Average roughness and root mean square values were chosen to investigate the surface features of endodontic files. The data was analyzed using one-way analysis of variance and post hoc Tamhane's tests at 5% significant level. Results The surface roughness values of WO and WOG files significantly changed after use in root canals (p < 0.05). The used WOG files exhibited higher surface roughness change when compared with the used WO files (p < 0.05). Conclusions Using WO and WOG Primary files in 3 root canals affected the surface topography of the files. After being used in root canals, the WOG files showed a higher level of surface porosity value than the WO files.
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Affiliation(s)
- Taha Özyürek
- Department of Endodontics, Ondokuz Mayis University Faculty of Dentistry, Samsun, Turkey
| | - Koray Yılmaz
- Çorum Oral and Dental Health Center, Çorum, Turkey
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Özyürek T, Gündoğar M, Yılmaz K, Uslu G. Bending resistance and cyclic fatigue life of Reciproc Blue, WaveOne Gold, and Genius files in a double (S-shaped) curved canal. J Dent Res Dent Clin Dent Prospects 2017; 11:241-246. [PMID: 29354251 PMCID: PMC5768957 DOI: 10.15171/joddd.2017.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 09/29/2017] [Indexed: 12/05/2022] Open
Abstract
Background. This study compared the cyclic fatigue resistance, bending resistance and cross-sectional areas of Reciproc Blue (RPC Blue), WaveOne Gold (WOG), and Genius File (GF) NiTi rotary systems.
Methods. Forty RPC Blue R25 (25/.08), 40 WOG Primary (25/.07) and 40 GF (25/.04) files were used in the present study. Flexibility of the files was determined by 45° bending test. The instruments were also subjected to cyclic fatigue resistance, calculating the number of cycles to fracture (NCF) in an S-shaped artificial stainless steel canal. Also the cross-sectional areas of the files were measured at D5 level. The length of the fractured file tips was measured. The fracture surface of all the fragments was examined with a scanning electron microscope. Data was statistically analyzed using one-way ANOVA and post hoc Tukey tests.
Results. In both the apical and coronal curvatures, the NCF of the GF was significantly higher than that of the RPC Blue and WOG files. There was no significant difference between the GF, WOG and Reciproc Blue files with respect to the lengths of the fractured file fragments in either the apical or coronal curvature. The bending resistance of the GF was signif-icantly higher than that of the RPC Blue and WOG files. The RPC Blue had the largest cross-sectional area, and the GF had the smallest cross-sectional area.
Conclusion. Within the limitations of the present study, the GF NiTi system exhibited the highest cyclic and bending re-sistance among the experimental groups.
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Affiliation(s)
- Taha Özyürek
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
| | - Mustafa Gündoğar
- Department of Endodontics, Faculty of Dentistry, Medipol University, Samsun, Turkey
| | - Koray Yılmaz
- Samsun Oral and Dental Health Hospital, Samsun, Turkey
| | - Gülşah Uslu
- Department of Endodontics, Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey
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Rubio J, Zarzosa JI, Pallarés A. Comparison of Shaping Ability of 10 Rotary and Reciprocating Systems: an In Vitro Study with AutoCad. Acta Stomatol Croat 2017; 51:207-216. [PMID: 29225361 PMCID: PMC5708324 DOI: 10.15644/asc51/3/4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective The aim of this study was to compare the cutting are, root canal anatomy preservation and non-instrumented areas of F360®, F6-SkyTaper®, Hyflex-EDM®, iRACE®, Neoniti®, O.Shape®, P.Next®, Reciproc®, Revo-S® and Wave-One-Gold® size 25 files. Materials and Methods 300 teeth with a single straight root and a circular or elliptical root canal were divided into 10 groups (1-F360®, 2- F6-SkyTaper®, 3-Hyflex-EDM®, 4-iRACE®, 5-Neoniti®, 6-O.Shape®, 7-P.Next®, 8-Reciproc®, 9-Revo-S® and 10-Wave-One-Gold®) cut into 3 cross sections using an ultrafine cutting disc. They were photographed under a stereo microscope and preinstrumentation analyses were made before rebuilding the teeth with# 10 K- File and epoxy glue. A glide path was created with #10 and #15 K files and each group was instrumented using rotary or reciprocating systems. Cutting areas, root canal anatomy preservation and non-instrumented areas were analyzed using the AutoCAD 2015 Levene's test, the Welch´s test, and the Games-Howell´s test. The Pearson’s chi-squared test was used for statistical analysis. Results Levene's test showed no equality of variances (P<0.05), therefore Welch´s and Games-Howell's tests were applied to cutting areas, showing significant differences in all thirds and overall (P<0.05). No differences in root canal anatomy preservation were observed (P>0.05). In non-instrumented areas, significant differences were found (P<0.05) in middle third being better in Reciproc®, Neoniti® and WaveOneGold®, and in apical thirds being higher P.Next®, Reciproc®, HyflexEDM®, Neoniti® and WaveOneGold®. Conclusions In cutting area, P.Next® and Reciproc® were superior in coronal third, Neoniti® and Hyflex EDM® medially and apically and Neoniti® and Reciproc® overall. Regarding the root canal anatomy preservation, all systems were similar. For non-instrumented areas, all systems achieved similar results coronally, but Reciproc®, Neoniti® and Wave One Gold® were superior in middle third and P.Next®, Reciproc®, Hyflex EDM®, Neoniti® and Wave One Gold® were superior in apically.
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Affiliation(s)
- Jorge Rubio
- Department of Endodontics, Catholic University of Valencia
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de Menezes SEAC, Batista SM, Lira JOP, de Melo Monteiro GQ. Cyclic Fatigue Resistance of WaveOne Gold, ProDesign R and ProDesign Logic Files in Curved Canals In Vitro. IRANIAN ENDODONTIC JOURNAL 2017; 12:468-473. [PMID: 29225643 PMCID: PMC5722121 DOI: 10.22037/iej.v12i4.17494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Introduction: Endodontic instruments are developed to provide a better cleaning of the root canal system and reduce its risk of fracture. The aim of this study was to evaluate the instrumentation time and cyclic fatigue resistance of WaveOne Gold, ProDesign R and ProDesign Logic files. Methods and Materials: Thirty Nickel-titanium (NiTi) rotary instruments were divided into 3 groups (n=10). ProDesign Logic file 25/0.06 was used in continuous rotation after glide path preparation. WaveOne Gold 25/0.07 and ProDesign R 25/0.06 files were used in reciprocating motion. Every file instrumented 3 standardized artificial canals. The average time, the number of cycles (NCI) and cyclic fatigue resistance of each file were determined through the number of cycles to failure (NCF) in a stainless-steel device. The total amount of cycles to fracture was also calculated (NCI+NCF). Data was analyzed using the Kruskal-Wallis and Mann-Whitney tests. Results: The instrumentation time of the ProDesign Logic file was significantly lower when compared to the other files (P=0.019). The longest times to failure were presented by ProDesign Logic (182.07 sec) and ProDesign R (152.38 sec) files. The same differences were observed for the NCF (910.37 and 761.93). The WaveOne Gold group presented a lower NCF as well as a smaller sum of NCI+NCF (748.33) that was statistically significant when compared to the other groups (P<0.05) respectively. Conclusion: The use of continuous rotational motion in canals with a glide path in the ProDesign Logic group led to shorter instrumentation time. The cyclic fatigue resistance of ProDesign R and Logic instruments was superior to WaveOne Gold. The thermal treatment of the instrument’s alloy, its cross section and the glide path seems to influence the cyclic fatigue resistance.
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Alcalde MP, Duarte MAH, Bramante CM, de Vasconselos BC, Tanomaru-Filho M, Guerreiro-Tanomaru JM, Pinto JC, Só MVR, Vivan RR. Cyclic fatigue and torsional strength of three different thermally treated reciprocating nickel-titanium instruments. Clin Oral Investig 2017; 22:1865-1871. [DOI: 10.1007/s00784-017-2295-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Accepted: 12/04/2017] [Indexed: 02/02/2023]
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