Hend M. Abou El Nasr * and Shehab El Din M. Saber ** ABSTRACT صور 4 لون
|
|
- Raymond Barrett
- 5 years ago
- Views:
Transcription
1 رقم املقالة الترقيم عدد الصفحات ص األلوان صور 1 لون صور 4 لون مالحظات Metallurgical and Mechanical Properties of Nickel Titanium Instruments Made of Fire-Wire, Controlled Memory Wire, M-Wire, and Conventional Superelastic Wires Hend M. Abou El Nasr * and Shehab El Din M. Saber ** ABSTRACT Aim: To compare the cyclic fatigue resistance of nickel titanium instruments manufactured with different thermomechanical procedures and to underline the possible factors that determine their mechanical behaviour. Methods: Revo-S, Profile Vortex, Typhoon Infinite Flex and EdgeFile files tested for their cyclic fatigue resistance in an artificially constructed stainless steel canal with a 5-mm radius and a 45 angle of curvature. Fractographic analysis was done using Environmental scanning electron microscope (ESEM) to determine the morphological characteristics of the fractured instruments. Chemical analysis using energy-dispersive spectrophotometry (EDS) and X-ray diffraction (XRD) were also done to determine the chemical composition and crystallographic structures of the tested instruments. Results: The EdgeFile had the highest NCF (P < ) followed by the Vortex file, then the Typhoon with no significant differences between them (P > 0.05). While Revo-S had the lowest NCF which was statistically non-significant from Typhoon (P > 0.05). The fractographic analysis confirmed a predominantly ductile mode of fracture for all instruments. EDS analysis showed that only Vortex files were composed exclusively of nickel (55.7 wt%) and titanium (44.3 wt%), while the other instruments were composed of about 47-48% Ni and 37-38% Ti. XRD examination revealed that the peaks detected in Revo-S were exclusively austenitic; while the other instruments displayed hybrid austenite and martensite phases with different proportions. Conclusion: The microstructure of NiTi raw material used in manufacturing endodontic instruments influences their mechanical behaviour more than does their elemental composition. * Lecturer, Department of Endodontics, Faculty of Oral and Dental Medicine, Cairo University ** Associate Professor, Department of Endodontics, Faculty of Dentistry, Ain Shams University
2 (2) E.D.J. Vol. 60, No. 2 Hend M. Abou El Nasr and Shehab El-Din M. Saber INTRODUCTION The use of rotary nickel titanium (NiTi) instruments with super-elastic properties has considerably simplified endodontic treatment. However, during root canal shaping, the continuous tensile and compressive stress cycles in the region of maximum canal curvature could lead to cyclic fatigue, which is one of the major causes of sudden file fracture (1, 2) that is not accompanied by visible signs of plastic deformation (3, 4). Moreover, when the NiTi alloy undergoes stress, the parent austenite phase (cubic crystal structure) transforms to martensite (monoclinic structure), which is unstable at the working temperature; so it reverts back to austenite when the stress is discontinued. This crystalline change enables a large recoverable elastic strain and gives rise to the superelastic behavior of the material (5). However, each of these crystallographic phase changes weakens the instrument and further reduces its cyclic fatigue resistance (4). Compared to austenite, the martensite phase is more ductile (5, 6) hence favors reducing the risk of file fracture under high stress because it can be plastically deformed rather than broken (7,8). Therefore, much effort has been placed by manufacturers to produce superelastic NiTi wire blanks that contain stable martensite under clinical conditions. This is possible by varying the Ni content in NiTi alloys (9), or more commonly by modifying the thermomechanical history of the alloy (7). In 2007, Sportswire (Langley, OK) developed the M-Wire, which is a variant of NiTi alloy composed of superelastic 508 nitinol that had undergone a proprietary method of treatment resulting in a material that includes both the martensitic and the premartensitic R-phase (6,10). In 2010, DS Dental (Johnson city, TN) produced the controlled memory (CM) wire using a special technology to control the material s memory (6, 9), and the files manufactured with these wires are used in the martensitic state (7). Very recently EdgeEndo (USA) launched EdgeFile endodontic instruments made of Fire-Wire NiTi alloy that promises performance enhancing durability (11). To date, there is no report of the fatigue behavior of this novel NiTi file. Therefore, the aim of the present study was to compare the cyclic fatigue resistance of EdgeFiles with those manufactured with different thermomechanical procedures and to underline the possible factors that determine their mechanical behaviour. Materials and Methods Cyclic fatigue testing Four types of rotary endodontic instruments were tested: Revo-S (Micro-Mega, Besancon Cedex, France) manufactured from conventional NiTi alloy, Profile Vortex (Dentsply Tulsa Dental Specialties, Tulsa, OK, USA) manufactured with M-wire technology, Typhoon Infinite Flex (Clinician s Choice Dental Products Inc., CT, USA) manufactured from a controlled memory wire, and EdgeFile (EdgeEndo, USA) manufactured with Fire-Wire heat treatment. For each system, 10 instruments of similar size and taper (30/.06) were subjected to cyclic fatigue testing using a mechanical device developed for this purpose and already used before (3). The instruments were rotated in a simulated canal at a constant speed of 350 rpm and a fixed torque of 2.5 Ncm using a 16:1 reduction hand piece, powered by an electric motor (NSK, Endo-Mate DT, Tokyo, Japan) in the presence of glycerin as lubricant. The simulated root canal was 18 mm long with a 45 angle of curvature and a 5-mm radius of curvature according to Pruett s method (12). The center of curvature was 6 mm from the instrument tip and the curved segment of the canal was 6 mm. After accurate file positioning to its full length, it was set to rotate freely and was synchronized with timing by a digital stopwatch (Timex, Middlebury, CT, USA) to the thousandth of a second. Timing
3 Metallurgical and Mechanical Properties of Nickel Titanium Instruments (3) was stopped as fracture was detected visually and audibly. The time to fracture was recorded and multiplied by the number of rotations per minute to obtain the number of cycles to failure (NCF) for each instrument. The NCF data were expressed as mean ± standard deviation (SD) and were analyzed by WinSTAT for Microsoft Excel (v , Germany). One-way analysis of variance (ANOVA) followed by Tukey Kramer multiple-comparison post hoc test was used for comparison between the different tested groups. The significance level was set at P Environmental scanning electron microscope (ESEM) Three fractured instruments were randomly selected from each group. They were ultrasonically cleaned in absolute alcohol for approximately 120 seconds then mounted with the fracture end facing upward for fractographic examination by ESEM (AMETEK, NJ, USA) to determine the morphological characteristics of the fractured instruments. Chemical analysis using energy-dispersive spectrophotometry (EDS) The surfaces of 3 new unused instruments from each type were analyzed using EDS (AMETEK, NJ, USA) to identify their metallurgic composition. Analyses were done at 30 kv at room temperature. X-ray diffraction (XRD) XRD (X Pert PRO; PANalytical BV, The Netherlands) was performed to identify phases in the instruments. Analyses were performed on 3 samples from each instrument type at room temperature (25 ), with CuKa monochromic radiation at 40 Kv and a tube current of 30 ma, and θ range. Segments from new unused instruments were prepared as described by Shen et al (8) and placed side by side on the glass sample holder. The peaks were identified by using the pattern library Powder Diffraction File (PDF release 2004; International Center for Diffraction Data, Newton Square, PA). Peaks were indexed to ICDD powder standards for austenite and martensite. Results Cyclic fatigue testing Statistical analysis of NCF (table 1) showed that the EdgeFile had the highest NCF (P < ) followed by the Vortex file, then the Typhoon with no significant differences between them (P > 0.05). While Revo-S had the lowest NCF which was not statistically significant from Typhoon (P> 0.05). Table 1. Mean values and standard deviations of NCF for all tested instruments. Mean (SD) Revo-S Typhoon Vortex EdgeFile a (1186.5) ab (1120) 5873 b c (3188.5) (1039.5) Mean values with different superscripts are significantly different at (P 0.05). Fractographic analysis using ESEM ESEM photos (Fig. 1) confirmed a predominantly ductile mode of fracture, as reflected by the numerous dimples on the fractured surface resulting from the formation of microvoids in the center of the metal shaft (overload zone) as it underwent cyclic fatigue. At high magnification; the dimpled surfaces revealed a characteristic population of microvoids for each instrument type. For Revo-S and EdgeFile instruments; the dimples were relatively larger, more elongated and open. For Vortex instruments; the dimples were relatively fewer and smaller, while for Typhoon instruments; the dimples were numerous and symmetrical.
4 (4) E.D.J. Vol. 60, No. 2 Hend M. Abou El Nasr and Shehab El-Din M. Saber FIG. (1) Scanning electron micrographs of the fractured surfaces obtained from different instruments after cyclic fatigue testing. (A-D) At low magnification showing centrally located overload zones with evidence of multiple crack initiation sites (black arrows) around the perimeter of the instrument shaft. (E-H) At high magnification the overload zones revealed evidence of dimpled rupture that occurred due to the coalescence of the microvoids in the overload zone resulting in the ultimate ductile fracture of the instruments. A large population of microvoids (white arrows) could be seen within the NiTi material.
5 Metallurgical and Mechanical Properties of Nickel Titanium Instruments (5) EDS analysis EDS analysis showed that only Vortex files were composed exclusively of nickel (55.7 wt%) and titanium (44.3 wt%). Revo-S files were composed of 48 wt% nickel, 37 wt% titanium with traces of aluminium (11 wt%) and nitrogen (4 wt%). Typhoon files were composed of 47 wt% Ni, 38 wt% Ti, with traces of oxygen (15 wt%), and similarly EdgeFiles were composed of 48 wt% Ni, 38 wt% Ti, with traces of oxygen (14 wt%). XRD Diffraction patterns at room temperature in Revo-S and Vortex contained 3 major peaks for the (110), (200), and (211) crystallographic planes. For Typhoon CM and EdgeFile instruments, XRD patterns contained numerous peaks that could be indexed to crystallographic planes of martensite (Fig. 2). FIG. (2) XRD patterns of Revo-S, Vortex, Typhoon (TYP CM), and EdgeFile (EDGE). Discussion The fatigue life of files produced with the recent thermomechanical technology Firewire (EdgeFile) was compared to those produced with CM Wire (Typhoon Infinite Flex), M-Wire (Profile Vortex), and conventional superelastic wire (Revo-S). To standardize the experimental design, the files were selected featuring similar cross sectional configurations with 3 cutting blades; whether triangular as the Vortex and Typhoon, asymmetrical triangle (Revo-S), or parabolic as described by the manufacturer of EdgeFile. They had similar size and taper (30/.06), rotated at the same speed
6 (6) E.D.J. Vol. 60, No. 2 Hend M. Abou El Nasr and Shehab El-Din M. Saber (350 rpm) and torque (2.5 Ncm), and were tested in an artificial canal that was constructed with a curvature having 45º angle and 5mm radius to simulate an abruptly curved canal (13-15). A static fatigue test was preferred because could be confined into a precise trajectory (2). The results showed that EdgeFile had the highest NCF while Revo-S had the lowest. Also, Vortex files had significantly more NCF than Revo-S confirming previous findings (16-18). It is well established that the mechanical behavior of endodontic instruments is influenced by their geometrical design (19-21) ; but since they present with comparable cross sections, it is expected that they experience similar stress distribution (20,21). So, this did not interpret the differences in the mechanical behavior. The low NCF expressed by Typhoon and approaching that of Revo-S was also intriguing. Typhoon has been judged as a flexible instrument (19) ; nonetheless, it produced more transportation than Vortex when preparing S-shaped canals (22). This suggests more stiffness than Vortex which might be attributed to its shorter working blade (12mm) and long rigid shaft (20). At this stage, a better insight was needed concerning the metallurgical properties of the instruments; among which the chemical composition, nature and proportions of their (6, 7) microstructural phases are the internal factors while thermomechanical processing and annealing are the external factors (7, 23). EDS and XRD were used to provide information on the chemical composition and crystallographic structure respectively. The Ni content of a NiTi alloy influences the mechanical properties of endodontic instruments (24) ; with the reduction of the Ni content, there is an increased tendency to obtain stable martensite (which is more flexible than austenite) at the working temperature (5). NiTi alloys used for endodontic instruments are made of approximately 56 wt% Ni and 44 wt% Ti (7). Among the instruments tested, only the Vortex presented this composition, while the other 3 instruments were composed of about 47-48% Ni and 37-38% Ti. The low Ni content might have improved the fracture resistance of EdgeFile; however, it seems that the Ni% was not the deciding factor in the superior behavior of Vortex and, conversely, did not improve the fatigue resistance of Revo-S and Typhoon. Therefore, just as Zhou et al (25), the influence of the composition could be ignored in this study. On the other hand, XRD examination revealed that the peaks detected in Revo-S were exclusively austenitic; while the other 3 instruments displayed hybrid phases containing austenite and martensite with different proportions. This was consistent with previous studies (8, 26) and affirmed the flexible properties of those instruments (27). Thus, the fracture resistance during cyclic loading could be substantially ascribed to the crystallographic profiles of the instruments investigated. Those are strictly determined by their respective thermomechanical histories (9), which were not disclosed by the manufacturers. However, heat treatment before, during, and after machining is known to produce better arrangement of the crystal structure, thus leading to improved flexibility, and changes in the percentage of phases of the alloy, leading to improved resistance or plastic behavior (24, 28). It allows the release of crystal lattice defects and diminishes the internal strain energy (29) and residual stresses, thereby reducing the rate of crack initiation and propagation (20). Practically, the fatigue life is determined by 2 factors: the rate of crack initiation and the rate of crack propagation (17). Therefore the fractured surfaces in this study were examined using ESEM. All the instruments exhibited characteristic features of fatigue failure. A dimpled overload zone containing extensive microvoids was centrally located. This is a typical picture of ductile fracture and indicates that the metal has undergone plastic deformation before breakage (30). The overload zone was large and surrounded by a smaller fatigue zone
7 Metallurgical and Mechanical Properties of Nickel Titanium Instruments (7) where slow crack growth occurred. The relative sizes of these two zones suggest that most fatigue failure was spent in the original crack formation, creating a heavy stress concentration that led to instantaneous failure. Moreover, being centrally located, is a sign that the failure was initiated at multiple locations around the perimeter of the shaft and grew inward (30). Indeed, SEM pictures revealed multiple crack origins which confirm that the instruments were under high stress (31). This picture was also described by previous investigators (18,29). Multiple fatigue-crack initiation sites normally indicate a weak resistance to crack nucleation and early propagation (17) ; however, the applied stresses are split up between all the cracks, thus reducing the strain localization and the speed of propagation of the fatigue (3). Moreover, the better reorientation capability of the martensite variants due to the lower symmetry of the monoclinic crystal structure than the cubic crystal structure of austenite makes it more resistant to crack initiation. This favorable reorientation also provides a better accommodation of deformation during bending rotation fatigue and effectively reduces the time in formation and accumulation of microstructural defects such as surface irregularities or subsurface voids in which fatigue cracks could nucleate (17). In addition to the improved resistance against fatigue-crack initiation, a hybrid microstructure with a certain proportion of martensite is more likely to have favorable crack propagation resistance than a fully austenitic microstructure (17). Therefore, within the conditions of the present study, we were able to conclude that the microstructure of NiTi raw material used in manufacturing endodontic instruments influences their cyclic fatigue resistance more than does their elemental composition. Nonetheless, it is worth noting that the clinical situation involves a complex type of stresses. The manufacturing technology of the EdgeFile proved to be superior to the other methods. Although some aspects of the files investigated have been clarified, further studies are needed to disclose more about their microstructure. References 1. Bahia MG, Buono VT. Decrease in the fatigue resistance of nickel-titanium rotary instruments after clinical use in curved root canals. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2005; 100: Plotino G, Grande NM, Cordaro M, Testarelli L, Gambarini G. A review of cyclic fatigue testing of nickel-titanium rotary instruments. J Endod 2009; 35: Saber SM. Factors affecting the fracture of rotary nickel titanium instruments. ENDO (Lond Engl) 2008; 2: Troian CH, Só MV, Figueiredo JA, Oliveira EP. Deformation and fracture of RaCe and K3 endodontic instruments according to the number of uses. Int Endod J 2006; 39: Thompson SA. An overview of nickel-titanium alloys used in dentistry. Int Endod J 2000; 33: Haapasalo M, Shen Y. Evolution of nickel titanium instruments: from past to future. Endodontic Topics 2013; 29: Zhou H, Peng B, Zheng YF. An overview of the mechanical properties of nickel titanium endodontic instruments. Endodontic Topics 2013; 29: Shen Y, Zhou HM, Zheng YF, Campbell L, Peng B, Haapasalo M. Metallurgical characterization of controlled memory wire nickel-titanium rotary instruments. J Endod 2011; 37: Santos LA, Bahia MGA, de Las Casas EB, Buono VTL. Comparison of the mechanical behavior between controlled memory and superelastic nickel-titanium files via finite element analysis. J Endod 2013; 39: Johnson E, Lloyd A, Kuttler S, Namerow K. Comparison between a novel nickel-titanium alloy and 508 nitinol on the cyclic fatigue life of ProFile 25/.04 rotary instruments. J Endod 2008; 34: Pruett JP, Clement DJ, Carnes DL Jr. Cyclic fatigue testing of nickel-titanium endodontic instruments. J Endod 1997; 23: Inan U, Aydin C, Tunca YM. Cyclic fatigue of ProTaper rotary nickel-titanium instruments in artificial canals with
8 (8) E.D.J. Vol. 60, No. 2 Hend M. Abou El Nasr and Shehab El-Din M. Saber 2 different radii of curvature. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2007; 104: Lopes HP, Vieira MVB, Elias CN, Siqueira Jr JF, Gonçalves LS, Vieira VTL. Location of the canal curvature and its influence on the resistance to fatigue fracture of two rotary nickel-titanium endodontic instruments. ENDO (Lond Engl) 2013; 7: Rodrigues RC, Lopes HP, Elias CN, Amaral G, Vieira VT, De Martin AS. Influence of different manufacturing methods on the cyclic fatigue of rotary nickel-titanium endodontic instruments. J Endod 2011; 37: Al-Hadlaq SM, Aljarbou FA, AlThumairy RI. Evaluation of cyclic flexural fatigue of M-wire nickel-titanium rotary instruments. J Endod 2010; 36: Gao Y, Shotton V, Wilkinson K, Phillips G, Johnson WB. Effects of raw material and rotational speed on the cyclic fatigue of ProFile Vortex rotary instruments. J Endod 2010; 36: Lopes HP, Gambarra-Soares T, Elias CN, Siqueira JF Jr, Inojosa IF, Lopes WS, Vieira VT. Comparison of the mechanical properties of rotary instruments made of conventional nickel-titanium wire, M-wire, or nickeltitanium alloy in R-phase. J Endod 2013; 39: Shen Y, Qian W, Abtin H, Gao Y, Haapasalo M. Fatigue testing of controlled memory wire nickel-titanium rotary instruments. J Endod 2011; 37: Kim TO, Cheung GS, Lee JM, Kim BM, Hur B, Kim HC. Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis. Int Endod J 2009; 42: Xu X, Eng M, Zheng Y, Eng D. Comparative study of torsional and bending properties for six models of nickeltitanium root canal instruments with different crosssections. J Endod 2006; 32: Burroughs JR, Bergeron BE, Roberts MD, Hagan JL, Himel VT. Shaping ability of three nickel-titanium endodontic file systems in simulated S-shaped root canals. J Endod 2012; 38: Kuhn G, Jordan L. Fatigue and mechanical properties of nickel-titanium endodontic instruments. J Endod 2002; 28: Testarelli L, Plotino G, Al-Sudani D, Vincenzi V, Giansiracusa A, Grande NM, Gambarini G. Bending properties of a new nickel-titanium alloy with a lower percent by weight of nickel. J Endod 2011; 37: Zhou HM, Shen Y, Zheng W, Li L, Zheng YF, Haapasalo M. Mechanical properties of controlled memory and superelastic nickel-titanium wires used in the manufacture of rotary endodontic instruments. J Endod 2012; 38: Alapati SB, Brantley WA, Iijima M, Clark WA, Kovarik L, Buie C, Liu J, Ben Johnson W. Metallurgical characterization of a new nickel-titanium wire for rotary endodontic instruments. J Endod 2009; 35: Condorelli GG, Bonaccorso A, Smecca E, Schäfer E, Cantatore G, Tripi TR. Improvement of the fatigue resistance of NiTi endodontic files by surface and bulk modifications. Int Endod J 2010; 43: Plotino G, Testarelli L, Al-Sudani D, Pongione G, Grande NM, Gambarini G. Fatigue resistance of rotary instruments manufactured using different nickel-titanium alloys: a comparative study. Odontology 2014; 102: Shen Y, Zhou HM, Wang Z, Campbell L, Zheng YF, Haapasalo M. Phase transformation behavior and mechanical properties of thermomechanically treated K3XF nickel-titanium instruments. J Endod 2013; 39: Ounsi HF, Salameh Z, Al-Shalan T, Ferrari M, Grandini S, Pashley DH, Tay FR. Effect of clinical use on the cyclic fatigue resistance of ProTaper nickel-titanium rotary instruments. J Endod 2007; 33: Sachs NW. Understanding the surface features of fatigue fractures: How they describe the failure cause and the failure history. JFAP 2005; 5: Pirani C, Ruggeri O, Cirulli PP, Pelliccioni GA, Gandolfi MG, Prati C. Metallurgical analysis and fatigue resistance of WaveOne and ProTaper nickel-titanium instruments. Odontology DOI /s (in press) 33. Alapati SB, Brantley WA, Svec TA, Powers JM, Mitchell JC. Scanning electron microscope observations of new and used nickel-titanium rotary files. J Endod 2003;29:
Effect of autoclave sterilization on the cyclic fatigue resistance of thermally treated Nickel Titanium instruments
doi:10.1111/iej.12550 Effect of autoclave sterilization on the cyclic fatigue resistance of thermally treated Nickel Titanium instruments D. Zhao 1, Y. Shen 2,3, B. Peng 1 & M. Haapasalo 2 1 Department
More informationComparison of the flexibility and torsional resistance of nickel-titanium rotary instruments.
original article Comparison of the flexibility and torsional resistance of nickel-titanium rotary instruments Weber Schmidt Pereira Lopes 1 Hélio Pereira Lopes 2 Carlos Nelson Elias 3 Marcelo Mangelli
More informationMicrostructural and mechanical characterizations of new Ni-Ti endodontic instruments
MATEC Web of Conferences 33, 03005 ( 2015) DOI: 10.1051/ matecconf/ 20153303005 C Owned by the authors, published by EDP Sciences, 2015 Microstructural and mechanical characterizations of new Ni-Ti endodontic
More informationThe introduction of nickel-titanium (NiTi) to endodontics over 2 decades ago has
ProFile Vortex Instruments after Clinical Use: A Metallurgical Properties Study Ya Shen, DDS, PhD,* Jeffrey M. Coil, DMD, MSD, PhD,* Hui-min Zhou, DDS, PhD, Esther Tam, DDS,* Yu-feng Zheng, PhD, and Markus
More informationThe advent of nickel-titanium (NiTi) rotary instruments has revolutionized root canal
Effect of Environment on Fatigue Failure of Controlled Memory Wire Nickel-Titanium Rotary Instruments Ya Shen, DDS, PhD,* Wei Qian, DDS, PhD,* Houman Abtin, BDS,* Yuan Gao, DDS, PhD, and Markus Haapasalo,
More informationTorsion Property and Cyclic Fatigue Fracture Behavior of. Nickel-Titanium Endodontic Instruments
Key Engineering Materials Online: 2005-06-15 ISSN: 1662-9795, Vols. 288-289, pp 603-606 doi:10.4028/www.scientific.net/kem.288-289.603 2005 Trans Tech Publications, Switzerland Torsion Property and Cyclic
More informationOver the past 2 decades, nickel-titanium (NiTi) instruments have become an important
Current Challenges and Concepts of the Thermomechanical Treatment of Nickel-Titanium Instruments Ya Shen, DDS, PhD,* Hui-min Zhou, DDS, PhD, Yu-feng Zheng, PhD, Bin Peng, DDS, PhD, and Markus Haapasalo,
More informationCIC Edizioni Internazionali. In vitro resistance to fracture of two nickel-titanium rotary instruments made with different thermal treatments
Original article In vitro resistance to fracture of two nickel-titanium rotary instruments made with different thermal treatments Gabriele Miccoli DDS Gianfranco Gaimari DDS, PhD Marco Seracchiani DDS
More informationFracture and deformation of ProTaper Next instruments after clinical use
Journal section: Operative Dentistry and Endodontics Publication Types: Research doi:10.4317/jced.54910 http://dx.doi.org/10.4317/jced.54910 instruments after clinical use Gema Fernández-Pazos, Benjamín
More informationAnalysis of Surface Characteristics of ProTaper Universal and ProTaper Next Instruments by Scanning Electron Microscopy
Journal section: Operative Dentistry and Endodontics Publication Types: Research doi:10.4317/jced.54049 http://dx.doi.org/10.4317/jced.54049 Analysis of Surface Characteristics of ProTaper Universal and
More informationA numerical method for predicting the bending fatigue life of NiTi and stainless steel root canal instruments
doi:10.1111/j.1365-2591.2010.01838.x A numerical method for predicting the bending fatigue life of NiTi and stainless steel root canal instruments G. S. P. Cheung 1, E. W. Zhang 2 & Y. F. Zheng 2 1 Area
More informationComparison of cyclic fatigue resistance of XP-endo Shaper, HyFlex CM, FlexMaster and Race instruments
Journal of Dental Research, Dental Clinics, Dental Prospects Original Article Comparison of cyclic fatigue resistance of XP-endo Shaper, HyFlex CM, FlexMaster and Race instruments Mehmet Adiguzel* Ipek
More informationPhysical and mechanical properties of a thermomechanically treated NiTi wire used in the manufacture of rotary endodontic instruments
doi:10.1111/j.1365-2591.2011.01998.x Physical and mechanical properties of a thermomechanically treated NiTi wire used in the manufacture of rotary endodontic instruments E. S. J. Pereira 1, I. F. C. Peixoto
More informationThe Effect of Surface Defects on the Cyclic Fatigue Fracture of HEROShaper Ni-Ti rotary files in a Dynamic Model: A Fractographic Analysis
대한치과보존학회지 : Vol. 32, No. 2, 2007 The Effect of Surface Defects on the Cyclic Fatigue Fracture of HEROShaper Ni-Ti rotary files in a Dynamic Model: A Fractographic Analysis Jung-Kyu Lee 1, Eui-Sung Kim
More informationIs the reciprocating movement per se able to improve the cyclic fatigue resistance of instruments?
doi:10.1111/iej.12166 Is the reciprocating movement per se able to improve the cyclic fatigue resistance of instruments? P. Kiefner 1, M. Ban 2 & G. De-Deus 3 1 Praxis f ur Zahnheilkunde/Endodontie, Stuttgart;
More informationEffect From Surface Treatment of Nickel-Titanium Rotary Files on the Fracture Resistance
SCANNING VOL. 37, 82 87 (2015) Wiley Periodicals, Inc. Effect From Surface Treatment of Nickel-Titanium Rotary Files on the Fracture Resistance BO HOON KIM, 1 JUNG-HONG HA, 2 WOO CHEOL LEE, 3 SANG-WON
More informationEffect of Cryogenic Treatment on Fracture Resistance of Nickel Titanium Rotary Instruments a Systematic Review
IJCRR Section: Healthcare Sci. Journal Impact Factor 4.016 ICV: 71.54 Review Article Effect of Cryogenic Treatment on Fracture Resistance of Nickel Titanium Rotary Instruments a Systematic Review Kumar
More informationComparison of cyclic fatigue resistance of original and counterfeit rotary instruments
Ertas et al. BioMedical Engineering OnLine 2014, 13:67 RESEARCH Open Access Comparison of cyclic fatigue resistance of original and counterfeit rotary instruments Huseyin Ertas 1*, Ismail Davut Capar 1,
More informationFracture Resistance of Wave-one Rotary File Used In Reciprocating Motion
Original Research Fracture Resistance of Wave-one Rotary File Used In Reciprocating Motion AUTHORS: Manish Shah*, Mahendra Patel**, Aesha Amin***, Pranav Kharod****, Chintan Joshi***** ABSTRACT: Introduction:
More informationThe nickel-titanium (NiTi) alloy, which consists of nickel and titanium in a nearly
Metallurgical Characterization of Controlled Memory Wire Nickel-Titanium Rotary Instruments Ya Shen, DDS, PhD,* Hui-min Zhou, PhD, Yu-feng Zheng, PhD, Les Campbell, DDS,* Bin Peng, DDS, PhD, and Markus
More informationCyclic fatigue life of Tango-Endo, WaveOne GOLD, and Reciproc NiTi instruments
Research article ISSN 2234-7658 (print) / ISSN 2234-7666 (online) Cyclic fatigue life of Tango-Endo, WaveOne GOLD, and Reciproc NiTi instruments Koray Yılmaz 1, Taha Özyürek 2 * 1 Samsun Oral and Dental
More informationEvaluation of physicochemical and mechanical properties of NiTi endodontic instruments made with conventional and controlled-memory alloys
original article Evaluation of physicochemical and mechanical properties of NiTi endodontic instruments made with conventional and controlled-memory alloys Hélio Pereira LOPES 1 Márcia Valéria Boussada
More informationRotary Fatigue Testing to Determine the Fatigue Life of NiTi alloy Wires: An Experimental and Numerical Analisys
Available online at www.sciencedirect.com Procedia Engineering 00 (2016) 000 000 www.elsevier.com/locate/procedia 1st International Conference on Structural Integrity Rotary Fatigue Testing to Determine
More informationLifespan of One Shape Files used in Severely Curved Canals in Resin Blocks and Extracted Teeth
Lifespan of One Shape Files used in Severely Curved Canals in Resin Blocks and Extracted Teeth Emilia Karova Assistant Professor, PhD, Department of Conservative Dentistry, Faculty of Dental Medicine,
More informationthinking beyond cyclic fatigue Testing standards for endo files vary and there are other qualities to be concerned with, too
thinking beyond cyclic fatigue Testing standards for endo files vary and there are other qualities to be concerned with, too In endodontic literature, significant attention has been devoted to and much
More informationHyFlex nickel titanium rotary instruments after clinical use: metallurgical properties
doi:10.1111/iej.12049 HyFlex nickel titanium rotary instruments after clinical use: metallurgical properties Y. Shen 1, J. M. Coil 1, H. Zhou 2, Y. Zheng 3 & M. Haapasalo 1 1 Division of Endodontics, Department
More informationCyclic fatigue resistance and fractographic analysis of RaCe and ProTaper rotary NiTi instruments
ORIGINAL ARTICLE Shahram Azimi1* DDS, MS, Parisa Delvari1 DDS, Hamid Cyrus Hajarian2 MD, DDS, MS, FICS, Mohammad Ali Saghiri3 BS, M.S, PhD, Kasra Karamifar4 DDS, Mehrdad Lotfi5 DMD, MSc Cyclic fatigue
More informationDifferential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments
Marquette University e-publications@marquette Master's Theses (2009 -) Dissertations, Theses, and Professional Projects Differential Scanning Calorimetric (DSC) Study of New and Sterilized Nickel-Titanium
More informationGlassman Webinar PPT 7/18/2014. Nickel Titanium Clinical Performance (2012) Depends on: three main factors :
Nickel Titanium Clinical Performance (2012) Depends on: three main factors : 1. Design 2. Metallurgy-Alloy/Manufacturing 3. Methods of use All of them are nowadays strictly interconnected, allowing manufacturers
More informationComparative analysis of torsional and bending behavior through finiteelement models of five Nickel-Titanium endodontic instruments
Submitted to Journal of Endodontics, July 2009 Comparative analysis of torsional and bending behavior through finiteelement models of five Nickel-Titanium endodontic instruments Valérie Chevalier *, Reza
More informationImprove Your Root Canal Preparations with Adaptive Motion Technology
Improve Your Root Canal Preparations with Adaptive Motion Technology During root canal preparations, clinicians may experience a variety of challenges. However, there are several difficulties that have
More informationMicroestructure alterations of rotary files after multiple simulated operative procedures
Journal section: Clinical and Experimental Dentistry Publication Types: Research doi:10.4317/medoral.15.e658 Microestructure alterations of rotary files after multiple simulated operative procedures Arlinda
More informationAn In Vitro Comparison of Cyclic Fatigue of Profile Vortex and Endosequence Rotary Nickel- Titanium Files
Virginia Commonwealth University VCU Scholars Compass Theses and Dissertations Graduate School 2011 An In Vitro Comparison of Cyclic Fatigue of Profile Vortex and Endosequence Rotary Nickel- Titanium Files
More informationGeometric and dimensional characteristics of simulated curved canals prepared with protaper instruments
www.scielo.br/jaos Geometric and dimensional characteristics of simulated curved canals prepared with protaper instruments Renata de Castro MARTINS 1, Maria Guiomar de Azevedo BAHIA 2, Vicente Tadeu Lopes
More informationREPORT DOCUMENTATION PAGE
REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions,
More informationEvaluation of selected mechanical properties of NiTi rotary glide path files manufactured from controlled memory wires
Dental Materials Journal 2018; : Evaluation of selected mechanical properties of NiTi rotary glide path files manufactured from controlled memory wires Miki NISHIJO 1, Arata EBIHARA 1, Daisuke TOKITA 1,
More informationWaveoneandoneShapeFilesSurvivalinSeverelyCurvedArtificialCanals
: J Dentistry and Otolaryngology Volume 14 Issue 4 Version 1.0 Year 2014 Type: Double Blind Peer Reviewed International Research Journal Publisher: Global Journals Inc. (USA) Online ISSN: 2249-4618 & Print
More informationShaping ability of ProTaper Universal, WaveOne and ProTaper Next in simulated L-shaped and S-shaped root canals
Wu et al. BMC Oral Health (2015) 15:27 DOI 10.1186/s12903-015-0012-z RESEARCH ARTICLE Open Access Shaping ability of ProTaper Universal, WaveOne and ProTaper Next in simulated L-shaped and S-shaped root
More informationin simulated curved canals
Journal section: Clinical and Experimental Dentistry Publication Types: Research doi:10.4317/medoral.16.e454 http://dx.doi.org/doi:10.4317/medoral.16.e454 Shaping ability of in simulated curved canals
More informationFailure of ProTaper rotary Ni-Ti instruments used by undergraduate students
Journal section: Clinical and Experimental Dentistry Publication Types: Research doi:10.4317/jced.50735 http://dx.doi.org/10.4317/jced.50735 Failure of ProTaper rotary Ni-Ti used by undergraduate students
More informationSurface properties of nickel-titanium rotary instruments
MATERIALS AND INSTRUMENTS 45 Antonio Bonaccorso, Teresa Roberta Tripi, Giuseppe Cantatore, Guglielmo Guido Condorelli Surface properties of nickel-titanium rotary instruments Key words autoclave sterilisation,
More informationA Shift Up In Performance. Performance Refined
A Shift Up In Performance. PROTAPER NEXT. Performance. You can count on the same ProTaper efficiency and variable taper performance you know and trust from ProTaper Universal. And now, that performance
More informationFailure of ProFile instruments used with air, high torque control, and low torque control motors
Failure of ProFile instruments used with air, high torque control, and low torque control motors Ghassan Yared, DDS, MSc, a and Philippe Sleiman, DDS, b Toronto, Ontario, Canada, and Beirut, Lebanon UNIVERSITY
More informationEvolution of Nickel titanium Alloys in Endodontics
REVIEW ARTICLE 10.5005/jp-journals-10024-2181 1 Hani F Ounsi, 2 Wadih Nassif, 3 Simone Grandini, 4 Ziad Salameh, 5 Prasanna Neelakantan, 6 Sukumaran Anil ABSTRACT To improve clinical use of nickel titanium
More informationEvaluation of canal preparation with rotary and hand Niti files in curved root canals using Cone Beam Computed Tomography: An In Vitro Study
Original Research Article Evaluation of canal preparation with rotary and hand Niti files in curved root canals using Cone Beam Computed Tomography: An In Vitro Study Neerja Sharma 1*, Shafia Sarfi 2,
More informationAN INVESTIGATION OF PHASE TRANSFORMATION MECHANISMS FOR NICKEL-TITANIUM ROTARY ENDODONTIC INSTRUMENTS DISSERTATION
AN INVESTIGATION OF PHASE TRANSFORMATION MECHANISMS FOR NICKEL-TITANIUM ROTARY ENDODONTIC INSTRUMENTS DISSERTATION Presented in Partial Fulfillment of the Requirements for the Degree Doctor of Philosophy
More informationRace family Endodontic NiTi rotary files
EN Race family Endodontic NiTi rotary files Foreword Race (Reamer with Alternating Cutting Edges) With the appearance of nickel-titanium (NiTi) alloy, the domain of endodontic instrument production discovered
More informationA comparison of cyclic fatigue between used and new Mtwo Ni Ti rotary instruments
doi: 10.1111/j.1365-2591.2006.01142.x A comparison of cyclic fatigue between used and new Mtwo Ni Ti rotary instruments G. Plotino 1, N. M. Grande 1, E. Sorci 2, V. A. Malagnino 2 & F. Somma 1 1 Department
More informationA WHOLE NEW DIMENSION OF TOTAL PERFORMANCE.
A WHOLE NEW DIMENSION OF TOTAL PERFORMANCE. GT Series X Endo System HAS IT ALL. In the past, rotary file design focused on either speed, respecting canal morphology or resisting file separation. One focus,
More informationSafety and Simplicity!
Safety and Simplicity! A safe and precise system for your daily practice A safe and precise system for your daily practice CMA system consists of 4 nickel-titanium rotary endodontic instruments for root
More informationNickel-titanium (NiTi) endodontic files are particularly helpful for successful shaping
SEM Observations and Differential Scanning Calorimetric Studies of New and Sterilized Nickel-Titanium Rotary Endodontic Instruments Georgia B. Alexandrou,* Konstantinos Chrissafis, Leonidas P. Vasiliadis,*
More informationENDO-EZE TM GENIUS ENDODONTIC SYSTEM WHERE SAFETY MEETS EFFICIENCY
ENDO-EZE TM GENIUS ENDODONTIC SYSTEM WHERE SAFETY MEETS EFFICIENCY WHERE SAFETY MEETS EFFICIENCY Clinicians have always had to choose between reciprocation and rotary; safety and efficiency. So which do
More informationThis in-vitro investigation was designed to form a simulated clinical use using RaCe
Cairo Dental Journal (25) Number (3), 367:374 September, 2009 A Comparative Study of Deformation and Fracture of Two Rotary Nikel Titanium Instruments after Simulated Clinical Use (In vitro) El-Maghraby
More informationEffective cleaning and shaping of the root
A new concept in canal preparation Dr. Ghassan Yared discusses canal preparation with only one reciprocating instrument without prior hand filing Effective cleaning and shaping of the root canal system
More informationComparative study on the shaping ability and cleaning efficiency of rotary Mtwo instruments. Part 1. Shaping ability in simulated curved canals
Comparative study on the shaping ability and cleaning efficiency of rotary Mtwo instruments. Part 1. Shaping ability in simulated curved canals E. Schäfer, M. Erler & T. Dammaschke Department of Operative
More informationResearch Article Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments
Hindawi Publishing Corporation e Scientific World Journal Volume 2014, Article ID 976459, 8 pages http://dx.doi.org/10.1155/2014/976459 Research Article Structural Characterisation and Mechanical FE Analysis
More informationSoftware and Hardware Implementation of a Microtorquemeter
Software and Hardware Implementation of a Microtorquemeter Matteo Giunta University of Catania Department of Industrial Engineering Viale A.Doria 6, 95125, Catania, Italy Email: matteo.giunta@studium.unict.it
More informationCyclic Fatigue Resistance of Three Single-use NiTi Instruments after Immersion in Sodium Hypochlorite
IJEDS Cyclic Fatigue Resistance of Three Single-use NiTi Instruments after 10.5005/jp-journals-10029-1074 Immersion in Sodium Hypochlorite ORIGINAL ARTICLE Cyclic Fatigue Resistance of Three Single-use
More informationOriginal Study. Annals of Dental Specialty Vol. 6; Issue 1. Jan Mar
Original Study A COMPARISON OF TRANSPORTATION OF THREE NICKEL-TITANIUM ENDODONTICS ROTARY SYSTEMS IN SEVERELY CURVED ROOT CANALS Donyavi Z, 1 Shahriari S, 2 Esmaeilzadeh M, 3 Ghanei S 4 1. Assistant Professor,
More informationAn in vitro comparison of different techniques for glide path preparation
452 > An in vitro comparison of different techniques for glide path preparation SADJ November 2015, Vol 70 no 10 p452 - p456 I Cassim 1, P van der Vyver 2 Abstract Introduction: The study compared modification
More informationDynamic and Cyclic Fatigue of Engine-Driven Rotary Nickel-Titanium Endodontic Instruments
JOURNAL OF ENDODONTICS rinted in U.S.A. Copyright 1999 by The American Association of Endodontists VOL. 25, NO. 6, JUNE 1999 Dynamic and Cyclic Fatigue of Engine-Driven Rotary Nickel-Titanium Endodontic
More informationTools for Endodontic Success
CLEANING & SHAPING Tools for Endodontic Success A Look Inside: C-Files Gates Glidden Drills K-Files Mid-Sized K Files To Dye For Flexicut Files Sodium Hypochlorite Hedstrom Files C.L. Canal Lubricant Reamers
More informationMechanical properties of WaveOne and ProTaper instruments in relation to torsion, hardness and tenacity
original article Mechanical properties of WaveOne and ProTaper instruments in relation to torsion, hardness and tenacity Cíntia ueno de PUL 1 Victor Talarico LEL 2 Renata Gonçalves SORES 1 Hélio Pereira
More informationFlute and Shank Dimensions of Reciprocating Instruments before and after Simulated Root Canal shaping
Felipe C Sampaio et al ORIGINAL RESEARCH 10.5005/jp-journals-10024-2016 Flute and Shank Dimensions of Reciprocating Instruments before and after Simulated Root Canal shaping 1 Felipe C Sampaio, 2 Ana PP
More informationComparison of the Different Techniques to Remove Fractured Endodontic Instruments from Root Canal Systems
Comparison of the Different Techniques to Remove Fractured Endodontic Instruments from Root Canal Systems Nimet Gencoglu a Dilek Helvacioglu b Abstract Objectives: To evaluate the success of certain methods
More informationEvaluation of the level of safety of three instrumentation systems to prepare curved canals
Evaluation canals Marco Antonio Hungaro Duarte 1 Maira Giampietro de Almeida 2 Fernanda Ferreira Oliveira Sakamoto 3 José Carlos Yamashita 4 Milton Carlos Kuga 5 Sylvio de Campos Fraga 6 Received on 28/2/00
More informationWHERE SAFETY MEETS EFFICIENCY
WHERE SAFETY MEETS EFFICIENCY Clinicians have always had to choose between reciprocation and rotary; safety and efficiency. So which do you choose? CLINICIANS NEED A FILE SYSTEM THAT IS COMPATIBLE WITH
More informationTorsion and Bending Properties of EdgeEndo Files
Marquette University e-publications@marquette Master's Theses (2009 -) Dissertations, Theses, and Professional Projects Torsion and Bending Properties of EdgeEndo Files Chad Hansen Marquette University
More informationComparison of the shaping ability of GT Series X, Twisted Files and AlphaKite rotary nickel-titanium systems in simulated canals
Ba-Hattab et al. BMC Oral Health 2013, 13:72 RESEARCH ARTICLE Open Access Comparison of the shaping ability of GT Series X, Twisted Files and AlphaKite rotary nickel-titanium systems in simulated canals
More informationLast Generation Endodontic Instruments. A Study of their. Drs. Siragusa and Racciatti are affiliated with the Department of
Last Generation Endodontic Instruments. A Study of their Efficacy in Apical Shaping M. Siragusa, DDS, PhD, and G. Racciatti, DDS Drs. Siragusa and Racciatti are affiliated with the Department of Endodontics,
More informationTorsional Testing of Race, K3 and Profile Nickel Titanium Endodontic Files
Virginia Commonwealth University VCU Scholars Compass Theses and Dissertations Graduate School 2004 Torsional Testing of Race, K3 and Profile Nickel Titanium Endodontic Files Sean D. Fessenden Virginia
More informationORIGINAL PAPERS. Porównanie skuteczności opracowania sztucznych kanałów w kształcie litery L dwoma systemami maszynowymi: Hyflex CM i ProTaper Next
ORIGINAL PAPERS Dent. d. Probl. 2015, 52, 1, 54 61 ISSN 1644-387X Copyright by Wroclaw dical University and Polish Dental Society Michał Łęski 1, A, B, Mateusz Radwański 2, B D 1, E, F, Halina Pawlicka
More informationXP-endo Shaper. The One to Shape your Success
EN XP-endo Shaper The One to Shape your Success Introduction Developments /trends In the last decades, the field of endodontics has seen a large number of developments. Driven by new technologies, the
More informationSingle File Reciprocating Technique Using Conventional Nickel Titanium Rotary Endodontic Files
SCANNING VOL. 35, 349 354 (2013) Wiley Periodicals, Inc. Single File Reciprocating Technique Using Conventional Nickel Titanium Rotary Endodontic Files SO YOUN JIN, 1 WOOCHEOL LEE, 2 MO K. KANG, 3 BOCK
More informationEndoWave. Enhanced safety for root canal preparation. Thinking ahead. Focused on life.
EndoWave Enhanced safety for root canal preparation Thinking ahead. Focused on life. Features that make a difference The triangular crosssection of the file minimizes the risk of fracture 3-point contact
More informationFRACTOGRAPHIC INVESTIGATION OF FAILURES IN 316L STAINLESS STEEL ORTHOPEDIC CONDYLAR BLADE PLATE
FRACTOGRAPHIC INVESTIGATION OF FAILURES IN 316L STAINLESS STEEL ORTHOPEDIC CONDYLAR BLADE PLATE Fariba NAGHDI, Hassan FARHANGI, Maryam ZAHIRI AZAR and Ali AMMARI ALLAHYARI School of Metallurgy and Materials
More informationComparison of the shaping ability of Twisted Files with ProTaper and RevoS nickel-titanium instruments in simulated canals
Journal of Dental Sciences (2012) 7, 283e288 Available online at www.sciencedirect.com journal homepage: www.e-jds.com ORIGINAL ARTICLE Comparison of the shaping ability of Twisted Files with ProTaper
More informationPeople have Priority. Endodontics
People have Priority Endodontics Endodontics Company 4 5 Product overview of Entran, Endo Cursor, Endea, Endo NiTi 6 7 Entran 8 9 Endo Cursor 10 11 Endea, Endo NiTi 12 13 W&H Endodontics 3 W&H Dentalwerk
More informationIN VITRO EVALUATION OF DENTINAL
ORIGINAL RESEARCH IN VITRO EVALUATION OF DENTINAL MICROCRACK FORMATION DURING ROOT CANAL PREPARATIONS BY DIFFERENT NITI SYSTEMS Rahman H*, Chandra A**, Singh S # * Assistant Professor, Department of Conservative
More informationK3 Nickel-Titanium Files
K3 Nickel-Titanium Files Overview Engineered For Efficiency Positive rake angle provides the active cutting action of the K3. Wide radial land provides blade support while adding peripheral strength to
More informationH. Caballero-Flores, C. K. Nabeshima, E. Binotto & M. E. L. Machado. Introduction
doi:10.1111/iej.12982 Fracture incidence of instruments from a single-file reciprocating system by students in an endodontic graduate programme: a cross-sectional retrospective study H. Caballero-Flores,
More informationcanal shaping capabilities of the ProTaper Universal and ProTaper Gold rotary instrument systems
Original Article http://dx.doi.org/10.1590/1678-77572016-0230 canal shaping capabilities of the ProTaper Universal and ProTaper Gold rotary instrument systems Abstract Jussaro Alves DUQUE 1 Rodrigo Ricci
More informationComparison of the Effects of Three Different Nickel titanium Rotary Instruments on the Fracture Resistance of Obturated Roots: An in vitro Study
Saimanaaz AH Shaikh et al ORIGINAL RESEARCH 10.5005/jp-journals-10031-1191 Comparison of the Effects of Three Different Nickel titanium Rotary Instruments on the Fracture Resistance of Obturated Roots:
More informationDepartment of Restorative Dentistry, Dental School, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil. 2
ISSNe 2178-1990 Fatigue resistance of rotary ProTaper Universal instruments after use with and without lateral pressure motion Resistência à fadiga de instrumentos rotatórios ProTaper Universal após o
More informationShaping Goals. Endodontic Canal Preparation: New Developments. Clinical goals. Mechanical goals. Where are we standing with this?
Endodontic Canal Preparation: New Developments Ove A. Peters, DMD MS PhD Diplomate, American Board of Endodontics February 8, 2013 Birmingham, AL What is new? Clinical goals! -! antimicrobial efficacy!
More informationCreating a glide path for rotary NiTi instruments: part two
Clinical Creating a glide path for rotary NiTi instruments: part two Peet van der Vyver 1 Introduction In part one of this series the author discussed the rationale for the preparation of a glide path
More informationNickel-titanium (NiTi) rotary instruments were introduced to improve root canal
Use of Nickel-Titanium Rotary PathFile to Create the Glide Path: Comparison With Manual Preflaring in Simulated Root Canals Elio Berutti, MD, DDS,* Giuseppe Cantatore, MD, DDS, Arnaldo Castellucci, MD,
More informationNickel titanium instruments in endodontics: a concise review of the state of the art
Critical Review Endodontic Therapy Nickel titanium instruments in endodontics: a concise review of the state of the art Giulio GAVINI (a) Marcelo dos SANTOS (a) Celso Luis CALDEIRA (a) Manoel Eduardo de
More informationYou succeed your root canal treatments! Characteristics...page 4. Instruments...page 6. Protocol...page 10. Questions & Answers...
We invent HERO Shaper. You succeed your root canal treatments! Summary Characteristics...page 4 Instruments...page 6 Protocol.....page 10 Questions & Answers...page 16 Clinical cases...page 19 2 Introduction
More informationPeople have Priority. Endodontics
People have Priority Endodontics Endodontics Company 4 5 Product overview of Entran, Endo Cursor, Endea, Endo NiTi 6 7 Entran 8 9 Endea Endo Cursor 10 11 Endea, Endo NiTi 12 13 W&H Endodontics 3 W&H Dentalwerk
More informationTorque During Canal Instrumentation Using Rotary Nickel-Titanium Files
JOURNAL OF ENCODONTCS Copyright 2 by The American Association of Endodontists Printed in U.S.A. VOL. 26, No. 3, MARCH 2 Torque During Canal nstrumentation Using Rotary Nickel-Titanium Files Boonrat Sattapan,
More informationUNITED STATES PATENT AND TRADEMARK OFFICE BEFORE THE PATENT TRIAL AND APPEAL BOARD. US ENDODONTICS, LLC, Petitioner,
Trials@uspto.gov Paper 13 571-272-7822 Date: October 26, 2015 UNITED STATES PATENT AND TRADEMARK OFFICE BEFORE THE PATENT TRIAL AND APPEAL BOARD US ENDODONTICS, LLC, Petitioner, v. GOLD STANDARD INSTRUMENTS,
More informationBuy Direct. Buy Brasseler USA. Systems for Endodontic Excellence. R a Ce T M. Rotary Endodontic System with Safety Memo Disc. RaCe TM.08. RaCe TM.
Systems for Endodontic Excellence RaCe TM.08 RaCe TM.06 RaCe TM.10 RaCe TM.04 RaCe TM.02 R a Ce T M Rotary Endodontic System with Safety Memo Disc Buy Direct. Buy Brasseler USA. Overview of Current Situation
More informationIN VITRO EVALUATION OF ROOT CANAL PREPARATION WITH TWO ROTARY INSTRUMENT SYSTEMS PRO TAPER AND HERO SHAPER
DOI: 10.15386/cjmed-454 Original Research IN VITRO EVALUATION OF ROOT CANAL PREPARATION WITH TWO ROTARY INSTRUMENT SYSTEMS PRO TAPER AND HERO SHAPER CAROLA PENTELESCU, LOREDANA COLCERIU, OVIDIU PASTRAV,
More informationCOMPARISON OF SCREW-IN EFFECT FOR SEVERAL NICKEL-TITANIUM ROTARY INSTRUMENTS IN SIMULATED RESIN ROOT CANAL
COMPARISON OF SCREW-IN EFFECT FOR SEVERAL NICKEL-TITANIUM ROTARY INSTRUMENTS IN SIMULATED RESIN ROOT CANAL Jung-Hong Ha, Myoung-Uk Jin, Young-Kyung Kim, Sung-Kyo Kim* Department of Conservative Dentistry,
More informationEndodontic instrument fracture: causes and prevention
Endodontic instrument fracture: causes and prevention M. B. McGuigan, 1 C. Louca 1 and H. F. Duncan* 2 IN BRIEF Reveals incidence of stainless steel and nickel-titanium file fracture. Considers the instrument,
More informationINFLUENCE OF ARTIFICIAL SALIVA ON NiTi ORTHODONTIC WIRES: A STUDY ON THE SURFACE CHARACTERIZATION
Materials Science, Vol. 47, No. 6, May, 2012 (Ukrainian Original Vol. 47, No. 6, November December, 2011) INFLUENCE OF ARTIFICIAL SALIVA ON NiTi ORTHODONTIC WIRES: A STUDY ON THE SURFACE CHARACTERIZATION
More informationAdaptation of Shot Peen Parameters for Gear Geometry
Adaptation of Shot Peen Parameters for Gear Geometry D. Breuer 1 and B. Matlock 2 1 Metal Improvement Company, Paramus, NJ USA 2 TEC Materials Testing, Knoxville, TN USA Abstract Shot peening is a well
More informationirace Quick, effective and safe
EN irace Quick, effective and safe The irace Sequence This sequence is really easy to use, economic and enables treatment of a majority of canals with just three instruments. irace sequence Thanks to their
More informationDental Research Journal
Dental Research Journal Original Article A novel approach to determine the effect of irrigation on temperature and failure of Ni-Ti endodontic rotary files Sayed Ali Mousavi 1, Vida Kargar-Dehnavi 2, Sayed
More information