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Gianluca Plotino - One of the best experts on this subject based on the ideXlab platform.
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blue thermomechanical treatment optimizes Fatigue Resistance and flexibility of the reciproc files
Journal of Endodontics, 2017Co-Authors: Gustavo Dedeus, Gianluca Plotino, Emmanuel João Nogueira Leal Silva, Victor Talarico Leal Vieira, Felipe Goncalves Belladonna, Carlos Nelson Elias, Nicola M GrandeAbstract:Abstract Introduction The aim of the present study was to evaluate the influence of Blue thermal treatment on the bending Resistance and cyclic Fatigue of conventional M-Wire Reciproc files (VDW, Munich, Germany). The roughness pattern and the microhardness of the files were also assessed. Methods Flexibility of standard Reciproc R25 files and the corresponding Blue prototypes was determined by 45° bending tests according to the ISO 3630-1 specification. Instruments were also subjected to cyclic Fatigue Resistance, measuring the time to fracture in an artificial stainless steel canal with a 60° angle and a 5-mm radius of curvature. The fracture surface of all fragments was examined with a scanning electron microscope. The roughness of the working parts was quantified by using a profilometer, and the microhardness test was performed using the Vickers hardness tester. Results were statistically analyzed using the Student t test with a level of significance set at P Results Reciproc Blue instruments presented a significantly longer cyclic Fatigue life and significantly lower bending Resistance than the original Reciproc instrument ( P P > .05), whereas Reciproc Blue revealed significantly lower microhardness than the original Reciproc instrument ( P Conclusions Reciproc Blue nickel-titanium showed improved all-around performance when compared with conventional M-Wire superelastic nickel-titanium, demonstrating improved flexibility and Fatigue Resistance, and reduced microhardness while maintaining similar characteristics of the surface.
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influence of temperature on cyclic Fatigue Resistance of protaper gold and protaper universal rotary files
Journal of Endodontics, 2017Co-Authors: Gianluca Plotino, Nicola M Grande, Luca Testarelli, Montse Mercade Bellido, Gianluca GambariniAbstract:Abstract Introduction The aim of this study was to evaluate the cyclic Fatigue Resistance of ProTaper Universal (PTU; Dentsply Maillefer, Baillagues, Switzerland) and ProTaper Gold (PTG, Dentsply Maillefer) nickel-titanium rotary files at room and intracanal temperatures. Methods A total of 120 files were used to test the cyclic Fatigue Resistance of PTU (S1 and F2) and PTG (S1 and F2) in an artificial canal at room temperature (20°C) and at intracanal temperature (35°C). The number of cycles to failure and the fracture length of the fragment were recorded, and data were subjected to statistical analysis. Results PTG registered no differences in Fatigue life between the 2 temperatures tested ( P > .05), whereas PTU showed a statistically significant reduction in Fatigue life at intracanal temperature compared with room temperature ( P P P > .05). Conclusions Intracanal temperature influenced the cyclic Fatigue Resistance of instruments produced with traditional nickel-titanium, whereas it did not influence the Fatigue life of instruments produced with gold heat treatment. Gold heating treatment enhances the Resistance to cyclic Fatigue of ProTaper instruments.
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torsional and cyclic Fatigue Resistance of a new nickel titanium instrument manufactured by electrical discharge machining
Journal of Endodontics, 2016Co-Authors: Eugenio Pedulla, Nicola M Grande, Gianluca Plotino, Simona Boninelli, G La Rosa, Fabio Lo Savio, Ernesto RapisardaAbstract:Abstract Introduction The purpose of this study was to evaluate the torsional and cyclic Fatigue Resistance of the new Hyflex EDM OneFile (Coltene/Whaledent AG, Altstatten, Switzerland) manufactured by electrical discharge machining and compare the findings with the ones of Reciproc R25 (VDW, Munich, Germany) and WaveOne Primary (Dentsply Maillefer, Ballaigues, Switzerland). Methods One hundred-twenty new Hyflex EDM OneFile (#25/0.08), Reciproc R25, and WaveOne Primary files were used. Torque and angle of rotation at failure of new instruments ( n = 20) were measured according to ISO 3630-1 for each brand. Cyclic Fatigue Resistance was tested measuring the number of cycles to failure in an artificial stainless steel canal with a 60° angle and a 3-mm radius of curvature. Data were analyzed using the analysis of variance test and the Student-Newman-Keuls test for multiple comparisons. The fracture surface of each fragment was examined with a scanning electron microscope. Results The cyclic Fatigue of Hyflex EDM was significantly higher than the one of Reciproc R25 and WaveOne Primary ( P P P P P > .05). Conclusions The new Hyflex EDM instruments (controlled memory wire) have higher cyclic Fatigue Resistance and angle of rotation to fracture but lower torque to failure than Reciproc R25 and WaveOne Primary files (M-wire for both files).
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influence of cyclic torsional preloading on cyclic Fatigue Resistance of nickel titanium instruments
International Endodontic Journal, 2015Co-Authors: Eugenio Pedulla, Nicola M Grande, Gianluca Plotino, Ernesto Rapisarda, Lo F Savio, Simona Boninelli, G La RosaAbstract:Abstract Pedulla E, Lo Savio F, Boninelli S, Plotino G,Grande NM, Rapisarda E, La Rosa G. Influence ofcyclic torsional preloading on cyclic Fatigue Resistanceof nickel – titanium instruments. International EndodonticJournal. Aim To evaluate the effect of different torsional pre-loads on cyclic Fatigue Resistance of endodontic rotaryinstruments constructed from conventional nickel-titanium (NiTi), M-Wire or CM-Wire.Methodology Eighty new size 25, 0.06 taperMtwo instruments (Sweden & Martina), size 25, 0.06taper HyFlex CM (Coltene/Whaledent, Inc) and X2ProTaper Next (Dentsply Maillefer) were used. TheTorque and distortion angles at failure of new instru-ments (n = 10) were measured, and 0% (n = 10),25%, 50% and 75% (n = 20) of the mean ultimatetorsional strength as preloading condition wereapplied according to ISO 3630-1 for each brand. Thetwenty files tested for every extent of preload weresubjected to 20 or 40 torsional cycles (n = 10). Aftertorsional preloading, the number of cycles to failurewas evaluated in a simulated canal with 60° angle ofcurvature and 5 mm of radius of curvature. Datawere analysed using two-way analysis of variance.The fracture surface of each fragment was examinedwith a scanning electron microscope (SEM). Datawere analysed by two-way analyses of variance.Results Preload repetitions did not influence thecyclic Fatigue of the three brands; however, the 25%,50% and 75% torsional preloading significantlyreduced the Fatigue Resistance of all instruments tested(P 0.05).Conclusions Torsional preloads reduced the cyclicFatigue Resistance of conventional and treated (M-wireand CM-wire) NiTi rotary instruments except for size25, 0.06 taper HyFlex CM instruments with a 25% oftorsional preloading.Keywords: CM-wire, cyclic Fatigue Resistance,M-wire, NiTi fracture, torsional preload.
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blue treatment enhances cyclic Fatigue Resistance of vortex nickel titanium rotary files
Journal of Endodontics, 2014Co-Authors: Gianluca Plotino, Nicola M Grande, Luca Testarelli, Elisabetta Cotti, Gianluca GambariniAbstract:Abstract Introduction The aim of the present study was to evaluate the difference in cyclic Fatigue Resistance between Vortex Blue (Dentsply Tulsa Dental, Tulsa, OK) and Profile Vortex nickel-titanium (Dentsply Tulsa Dental) rotary instruments. Methods Two groups of nickel-titanium endodontic instruments, ProFile Vortex and Vortex Blue, consisting of identical instruments in tip size and taper (15/.04, 20/.06, 25/.04, 25/.06, 30/.06, 35/.06, and 40/.04) were tested. Ten instruments from each system and size were tested for cyclic Fatigue Resistance, resulting in a total of 140 new instruments. All instruments were rotated in a simulated root canal with a 60° angle of curvature and a 5-mm radius of curvature of a specific cyclic Fatigue testing device until fracture occurred. The number of cycles to failure and the length of the fractured tip were recorded for each instrument in each group. The mean values and standard deviation were calculated, and data were subjected to 1-way analysis of variance and a Bonferroni t test. Significance was set at the 95% confidence level. Results When comparing the same size of the 2 different instruments, a statistically significant difference ( P P = 1.000). No statistically significant difference ( P > .05) was noted among all groups tested in terms of fragment length. Conclusions Vortex Blue showed a significant increase in cyclic Fatigue Resistance when compared with the same sizes of ProFile Vortex.
Nicola M Grande - One of the best experts on this subject based on the ideXlab platform.
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blue thermomechanical treatment optimizes Fatigue Resistance and flexibility of the reciproc files
Journal of Endodontics, 2017Co-Authors: Gustavo Dedeus, Gianluca Plotino, Emmanuel João Nogueira Leal Silva, Victor Talarico Leal Vieira, Felipe Goncalves Belladonna, Carlos Nelson Elias, Nicola M GrandeAbstract:Abstract Introduction The aim of the present study was to evaluate the influence of Blue thermal treatment on the bending Resistance and cyclic Fatigue of conventional M-Wire Reciproc files (VDW, Munich, Germany). The roughness pattern and the microhardness of the files were also assessed. Methods Flexibility of standard Reciproc R25 files and the corresponding Blue prototypes was determined by 45° bending tests according to the ISO 3630-1 specification. Instruments were also subjected to cyclic Fatigue Resistance, measuring the time to fracture in an artificial stainless steel canal with a 60° angle and a 5-mm radius of curvature. The fracture surface of all fragments was examined with a scanning electron microscope. The roughness of the working parts was quantified by using a profilometer, and the microhardness test was performed using the Vickers hardness tester. Results were statistically analyzed using the Student t test with a level of significance set at P Results Reciproc Blue instruments presented a significantly longer cyclic Fatigue life and significantly lower bending Resistance than the original Reciproc instrument ( P P > .05), whereas Reciproc Blue revealed significantly lower microhardness than the original Reciproc instrument ( P Conclusions Reciproc Blue nickel-titanium showed improved all-around performance when compared with conventional M-Wire superelastic nickel-titanium, demonstrating improved flexibility and Fatigue Resistance, and reduced microhardness while maintaining similar characteristics of the surface.
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influence of temperature on cyclic Fatigue Resistance of protaper gold and protaper universal rotary files
Journal of Endodontics, 2017Co-Authors: Gianluca Plotino, Nicola M Grande, Luca Testarelli, Montse Mercade Bellido, Gianluca GambariniAbstract:Abstract Introduction The aim of this study was to evaluate the cyclic Fatigue Resistance of ProTaper Universal (PTU; Dentsply Maillefer, Baillagues, Switzerland) and ProTaper Gold (PTG, Dentsply Maillefer) nickel-titanium rotary files at room and intracanal temperatures. Methods A total of 120 files were used to test the cyclic Fatigue Resistance of PTU (S1 and F2) and PTG (S1 and F2) in an artificial canal at room temperature (20°C) and at intracanal temperature (35°C). The number of cycles to failure and the fracture length of the fragment were recorded, and data were subjected to statistical analysis. Results PTG registered no differences in Fatigue life between the 2 temperatures tested ( P > .05), whereas PTU showed a statistically significant reduction in Fatigue life at intracanal temperature compared with room temperature ( P P P > .05). Conclusions Intracanal temperature influenced the cyclic Fatigue Resistance of instruments produced with traditional nickel-titanium, whereas it did not influence the Fatigue life of instruments produced with gold heat treatment. Gold heating treatment enhances the Resistance to cyclic Fatigue of ProTaper instruments.
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torsional and cyclic Fatigue Resistance of a new nickel titanium instrument manufactured by electrical discharge machining
Journal of Endodontics, 2016Co-Authors: Eugenio Pedulla, Nicola M Grande, Gianluca Plotino, Simona Boninelli, G La Rosa, Fabio Lo Savio, Ernesto RapisardaAbstract:Abstract Introduction The purpose of this study was to evaluate the torsional and cyclic Fatigue Resistance of the new Hyflex EDM OneFile (Coltene/Whaledent AG, Altstatten, Switzerland) manufactured by electrical discharge machining and compare the findings with the ones of Reciproc R25 (VDW, Munich, Germany) and WaveOne Primary (Dentsply Maillefer, Ballaigues, Switzerland). Methods One hundred-twenty new Hyflex EDM OneFile (#25/0.08), Reciproc R25, and WaveOne Primary files were used. Torque and angle of rotation at failure of new instruments ( n = 20) were measured according to ISO 3630-1 for each brand. Cyclic Fatigue Resistance was tested measuring the number of cycles to failure in an artificial stainless steel canal with a 60° angle and a 3-mm radius of curvature. Data were analyzed using the analysis of variance test and the Student-Newman-Keuls test for multiple comparisons. The fracture surface of each fragment was examined with a scanning electron microscope. Results The cyclic Fatigue of Hyflex EDM was significantly higher than the one of Reciproc R25 and WaveOne Primary ( P P P P P > .05). Conclusions The new Hyflex EDM instruments (controlled memory wire) have higher cyclic Fatigue Resistance and angle of rotation to fracture but lower torque to failure than Reciproc R25 and WaveOne Primary files (M-wire for both files).
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influence of cyclic torsional preloading on cyclic Fatigue Resistance of nickel titanium instruments
International Endodontic Journal, 2015Co-Authors: Eugenio Pedulla, Nicola M Grande, Gianluca Plotino, Ernesto Rapisarda, Lo F Savio, Simona Boninelli, G La RosaAbstract:Abstract Pedulla E, Lo Savio F, Boninelli S, Plotino G,Grande NM, Rapisarda E, La Rosa G. Influence ofcyclic torsional preloading on cyclic Fatigue Resistanceof nickel – titanium instruments. International EndodonticJournal. Aim To evaluate the effect of different torsional pre-loads on cyclic Fatigue Resistance of endodontic rotaryinstruments constructed from conventional nickel-titanium (NiTi), M-Wire or CM-Wire.Methodology Eighty new size 25, 0.06 taperMtwo instruments (Sweden & Martina), size 25, 0.06taper HyFlex CM (Coltene/Whaledent, Inc) and X2ProTaper Next (Dentsply Maillefer) were used. TheTorque and distortion angles at failure of new instru-ments (n = 10) were measured, and 0% (n = 10),25%, 50% and 75% (n = 20) of the mean ultimatetorsional strength as preloading condition wereapplied according to ISO 3630-1 for each brand. Thetwenty files tested for every extent of preload weresubjected to 20 or 40 torsional cycles (n = 10). Aftertorsional preloading, the number of cycles to failurewas evaluated in a simulated canal with 60° angle ofcurvature and 5 mm of radius of curvature. Datawere analysed using two-way analysis of variance.The fracture surface of each fragment was examinedwith a scanning electron microscope (SEM). Datawere analysed by two-way analyses of variance.Results Preload repetitions did not influence thecyclic Fatigue of the three brands; however, the 25%,50% and 75% torsional preloading significantlyreduced the Fatigue Resistance of all instruments tested(P 0.05).Conclusions Torsional preloads reduced the cyclicFatigue Resistance of conventional and treated (M-wireand CM-wire) NiTi rotary instruments except for size25, 0.06 taper HyFlex CM instruments with a 25% oftorsional preloading.Keywords: CM-wire, cyclic Fatigue Resistance,M-wire, NiTi fracture, torsional preload.
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blue treatment enhances cyclic Fatigue Resistance of vortex nickel titanium rotary files
Journal of Endodontics, 2014Co-Authors: Gianluca Plotino, Nicola M Grande, Luca Testarelli, Elisabetta Cotti, Gianluca GambariniAbstract:Abstract Introduction The aim of the present study was to evaluate the difference in cyclic Fatigue Resistance between Vortex Blue (Dentsply Tulsa Dental, Tulsa, OK) and Profile Vortex nickel-titanium (Dentsply Tulsa Dental) rotary instruments. Methods Two groups of nickel-titanium endodontic instruments, ProFile Vortex and Vortex Blue, consisting of identical instruments in tip size and taper (15/.04, 20/.06, 25/.04, 25/.06, 30/.06, 35/.06, and 40/.04) were tested. Ten instruments from each system and size were tested for cyclic Fatigue Resistance, resulting in a total of 140 new instruments. All instruments were rotated in a simulated root canal with a 60° angle of curvature and a 5-mm radius of curvature of a specific cyclic Fatigue testing device until fracture occurred. The number of cycles to failure and the length of the fractured tip were recorded for each instrument in each group. The mean values and standard deviation were calculated, and data were subjected to 1-way analysis of variance and a Bonferroni t test. Significance was set at the 95% confidence level. Results When comparing the same size of the 2 different instruments, a statistically significant difference ( P P = 1.000). No statistically significant difference ( P > .05) was noted among all groups tested in terms of fragment length. Conclusions Vortex Blue showed a significant increase in cyclic Fatigue Resistance when compared with the same sizes of ProFile Vortex.
Gianluca Gambarini - One of the best experts on this subject based on the ideXlab platform.
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influence of temperature on cyclic Fatigue Resistance of protaper gold and protaper universal rotary files
Journal of Endodontics, 2017Co-Authors: Gianluca Plotino, Nicola M Grande, Luca Testarelli, Montse Mercade Bellido, Gianluca GambariniAbstract:Abstract Introduction The aim of this study was to evaluate the cyclic Fatigue Resistance of ProTaper Universal (PTU; Dentsply Maillefer, Baillagues, Switzerland) and ProTaper Gold (PTG, Dentsply Maillefer) nickel-titanium rotary files at room and intracanal temperatures. Methods A total of 120 files were used to test the cyclic Fatigue Resistance of PTU (S1 and F2) and PTG (S1 and F2) in an artificial canal at room temperature (20°C) and at intracanal temperature (35°C). The number of cycles to failure and the fracture length of the fragment were recorded, and data were subjected to statistical analysis. Results PTG registered no differences in Fatigue life between the 2 temperatures tested ( P > .05), whereas PTU showed a statistically significant reduction in Fatigue life at intracanal temperature compared with room temperature ( P P P > .05). Conclusions Intracanal temperature influenced the cyclic Fatigue Resistance of instruments produced with traditional nickel-titanium, whereas it did not influence the Fatigue life of instruments produced with gold heat treatment. Gold heating treatment enhances the Resistance to cyclic Fatigue of ProTaper instruments.
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blue treatment enhances cyclic Fatigue Resistance of vortex nickel titanium rotary files
Journal of Endodontics, 2014Co-Authors: Gianluca Plotino, Nicola M Grande, Luca Testarelli, Elisabetta Cotti, Gianluca GambariniAbstract:Abstract Introduction The aim of the present study was to evaluate the difference in cyclic Fatigue Resistance between Vortex Blue (Dentsply Tulsa Dental, Tulsa, OK) and Profile Vortex nickel-titanium (Dentsply Tulsa Dental) rotary instruments. Methods Two groups of nickel-titanium endodontic instruments, ProFile Vortex and Vortex Blue, consisting of identical instruments in tip size and taper (15/.04, 20/.06, 25/.04, 25/.06, 30/.06, 35/.06, and 40/.04) were tested. Ten instruments from each system and size were tested for cyclic Fatigue Resistance, resulting in a total of 140 new instruments. All instruments were rotated in a simulated root canal with a 60° angle of curvature and a 5-mm radius of curvature of a specific cyclic Fatigue testing device until fracture occurred. The number of cycles to failure and the length of the fractured tip were recorded for each instrument in each group. The mean values and standard deviation were calculated, and data were subjected to 1-way analysis of variance and a Bonferroni t test. Significance was set at the 95% confidence level. Results When comparing the same size of the 2 different instruments, a statistically significant difference ( P P = 1.000). No statistically significant difference ( P > .05) was noted among all groups tested in terms of fragment length. Conclusions Vortex Blue showed a significant increase in cyclic Fatigue Resistance when compared with the same sizes of ProFile Vortex.
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Fatigue Resistance of rotary instruments manufactured using different nickel–titanium alloys: a comparative study
Odontology, 2014Co-Authors: Gianluca Plotino, Dina Al-sudani, Gianlcarlo Pongione, Nicola M Grande, Luca Testarelli, Gianluca GambariniAbstract:The aim of this study was to investigate whether cyclic Fatigue Resistance is increased for Controlled Memory (CM) Nickel–Titanium (NiTi) instruments, compared to instruments produced using traditional NiTi and instruments produced using M-Wire alloy. Two groups of NiTi endodontic instruments consisting of identical instrument sizes (constant 0.06 taper and 0.25 tip diameter and constant 0.04 taper and 0.40 tip diameter) were tested: group A compared Hyflex™ CM, Vortex ™ and ProFile ™ size 25 and 0.06 taper and group B compared Hyflex™ CM, Vortex™ and ProFile™ size 40 and 0.04 taper. 10 files from each different subgroup were tested for cyclic Fatigue Resistance. Mean and standard deviations of the Number of Cycles to Failure (NCF) were calculated for each group and data were statistically analysed ( p 0.05) was noted between Vortex™ and ProFile™ in the tested sizes. The new manufacturing process involving memory shape heat treatment produced new NiTi rotary files (Hyflex™ CM) significantly more resistant to Fatigue than instruments produced with other proprietary methods of treatment (Vortex™) and with the traditional NiTi grinding process (ProFile™).
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Fatigue Resistance of rotary instruments manufactured using different nickel titanium alloys a comparative study
Odontology, 2014Co-Authors: Gianluca Plotino, Gianlcarlo Pongione, Nicola M Grande, Luca Testarelli, Dina Alsudani, Gianluca GambariniAbstract:The aim of this study was to investigate whether cyclic Fatigue Resistance is increased for Controlled Memory (CM) Nickel-Titanium (NiTi) instruments, compared to instruments produced using traditional NiTi and instruments produced using M-Wire alloy. Two groups of NiTi endodontic instruments consisting of identical instrument sizes (constant 0.06 taper and 0.25 tip diameter and constant 0.04 taper and 0.40 tip diameter) were tested: group A compared Hyflex™ CM, Vortex ™ and ProFile ™ size 25 and 0.06 taper and group B compared Hyflex™ CM, Vortex™ and ProFile™ size 40 and 0.04 taper. 10 files from each different subgroup were tested for cyclic Fatigue Resistance. Mean and standard deviations of the Number of Cycles to Failure (NCF) were calculated for each group and data were statistically analysed (p 0.05) was noted between Vortex™ and ProFile™ in the tested sizes. The new manufacturing process involving memory shape heat treatment produced new NiTi rotary files (Hyflex™ CM) significantly more resistant to Fatigue than instruments produced with other proprietary methods of treatment (Vortex™) and with the traditional NiTi grinding process (ProFile™).
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cyclic Fatigue Resistance of two reciprocating nickel titanium instruments after immersion in sodium hypochlorite
International Endodontic Journal, 2013Co-Authors: Eugenio Pedulla, Gianluca Gambarini, Gianluca Plotino, N M Grande, F Palermo, Ernesto RapisardaAbstract:Aim To assess Resistance to cyclic Fatigue of reciprocating nickel–titanium ( NiTi ) files (Reciproc and WaveOne) after immersion in NaOCl solution over several time periods. Methodology A total of 90 new Reciproc R25 and WaveOne Primary were tested. The 45 files of the same brand were randomly assigned to three groups (n = 15) and submitted to the following immersion protocol in 5% NaOCl at 37 °C for 16 mm: no immersion (control), 1 or 5 min dynamically. The dynamic immersion and the following cyclic Fatigue tests were performed using the appropriate preset reciprocation modes (‘RECIPROC ALL’ or ‘WAVEONE ALL’) in a specially designed endodontic motor. Resistance to cyclic Fatigue was determined by recording time to fracture (TtF) in a stainless steel artificial canal with a 60° angle of curvature and 5 mm radius of curvature. The artificial canal was manufactured reproducing the instrument's size and taper. Data were analysed by 2-way analyses of variance. Results Resistance to cyclic Fatigue of the same NiTi file was not significantly affected by immersion in NaOCl . Reciproc R25 was associated with a higher cyclic Fatigue Resistance in all groups compared to WaveOne Primary (P < 0.0001). Conclusions Reciprocating dynamic immersion in NaOCl for 1 or 5 min did not reduce the cyclic Fatigue Resistance of NiTi files significantly. However, the type of reciprocating instrument influenced cyclic Fatigue Resistance with Reciproc R25 being more resistant than WaveOne Primary.
Ali Keles - One of the best experts on this subject based on the ideXlab platform.
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Cyclic Fatigue Resistance of R-Pilot, WaveOne Gold Glider, and ProGlider glide path instruments
Clinical Oral Investigations, 2018Co-Authors: Cangul Keskin, Ugur Inan, Murat Demiral, Ali KelesAbstract:Objective The aim of the present study was to compare the cyclic Fatigue Resistance of R-Pilot (VDW; Munich, Germany) with ProGlider (Denstply Sirona; Ballaigues, Switzerland) and WaveOne Gold Glider (Denstply Sirona; Ballaigues, Switzerland) glide path instruments. Materials and methods R-Pilot, ProGlider, and WaveOne Gold Glider instruments were collected ( n = 15) and tested in a dynamic cyclic Fatigue test device, which has an artificial canal with 60° angle of curvature and a 5-mm radius of curvature. All instruments were operated until fracture occurred, and both time to fracture (TF) and the lengths of the fractured fragments were recorded. Mean and standard deviations of TF and fragment length were calculated for each reciprocating system. TF data and fractured fragment length data were subjected to one-way ANOVA and post-hoc Tukey tests ( P 0.05). Conclusions The reciprocating WaveOne Gold Glider and R-Pilot instruments had significantly higher cyclic Fatigue Resistance than rotary ProGlider instruments. Clinical relevance This study reported that novel reciprocating glide path instruments exhibited higher cyclic Fatigue Resistance than rotating glide path instrument.
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cyclic Fatigue Resistance of r pilot waveone gold glider and proglider glide path instruments
Clinical Oral Investigations, 2018Co-Authors: Cangul Keskin, Ugur Inan, Murat Demiral, Ali KelesAbstract:The aim of the present study was to compare the cyclic Fatigue Resistance of R-Pilot (VDW; Munich, Germany) with ProGlider (Denstply Sirona; Ballaigues, Switzerland) and WaveOne Gold Glider (Denstply Sirona; Ballaigues, Switzerland) glide path instruments. R-Pilot, ProGlider, and WaveOne Gold Glider instruments were collected (n = 15) and tested in a dynamic cyclic Fatigue test device, which has an artificial canal with 60° angle of curvature and a 5-mm radius of curvature. All instruments were operated until fracture occurred, and both time to fracture (TF) and the lengths of the fractured fragments were recorded. Mean and standard deviations of TF and fragment length were calculated for each reciprocating system. TF data and fractured fragment length data were subjected to one-way ANOVA and post-hoc Tukey tests (P 0.05). Weibull analysis revealed that WaveOne Gold Glider showed the highest predicted TF value for 99% survival rate, which was followed by R-Pilot and ProGlider. Regarding the length of the fractured tips, there were no significant differences among the instruments (P > 0.05). The reciprocating WaveOne Gold Glider and R-Pilot instruments had significantly higher cyclic Fatigue Resistance than rotary ProGlider instruments. This study reported that novel reciprocating glide path instruments exhibited higher cyclic Fatigue Resistance than rotating glide path instrument.
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cyclic Fatigue Resistance of reciproc blue reciproc and waveone gold reciprocating instruments
Journal of Endodontics, 2017Co-Authors: Cangul Keskin, Ugur Inan, Murat Demiral, Ali KelesAbstract:Abstract Introduction The aim of the present study was to compare the cyclic Fatigue Resistance of Reciproc Blue R25 (VDW, Munich, Germany) with Reciproc R25 (VDW) and WaveOne Gold Primary (Denstply Maillefer, Ballaigues, Switzerland). Methods Fifteen Reciproc Blue R25, 15 Reciproc R25, and 15 WaveOne Gold Primary instruments were collected and tested in a dynamic cyclic Fatigue test device, which has an artificial canal with a 60° angle of curvature and a 5-mm radius of curvature. All instruments were operated until fracture occurred, and time to fracture (TF) and the lengths of the fractured fragments were recorded. The mean and standard deviations of TF and fragment length were calculated for each reciprocating system. TF data were subjected to Kruskal-Wallis 1-way analysis of variance and the Dunn test, whereas fractured fragment length data were subjected to 1-way analysis of variance ( P Results Reciproc Blue R25 exhibited the highest cyclic Fatigue Resistance ( P P P > .05). Conclusions Reciproc Blue R25 instruments had significantly higher cyclic Fatigue Resistance than WaveOne Gold and Reciproc R25 instruments.
G. Martin - One of the best experts on this subject based on the ideXlab platform.
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Effect of ultrasonic shot peening on the surface defects of thin struts built by electron beam melting: Consequences on Fatigue Resistance
Additive Manufacturing, 2019Co-Authors: T. Persenot, A. Burr, E. Plancher, J.-y. Buffiere, R. Dendievel, G. MartinAbstract:Ti-6Al-4V thin struts, built by selective electron beam melting have been submitted to hot isostatic pressing and further processed with ultrasonic shot peening to investigate the effect of this surface treatment on surface defects. The consequence of those surface defects on the Fatigue Resistance of thin struts has been evaluated before and after treatment. X-ray microtomography has been used to track the defect population with repeated scans before and after ultrasonic shot peening as well as after Fatigue tests conducted to failure. Our results show that the Fatigue Resistance of surface-treated struts (measured at 105 cycles) is doubled compared to the Fatigue Resistance of struts with an as-built surface. This enhancement in Fatigue Resistance is attributed to a refinement of the sub-surface microstructure, to the introduction of local compressive residual stresses and to a significant surface smoothing effect induced by ultrasonic shot peening. Ultrasonic shot peening fails to “heal” the most tortuous surface defects observed in the as-built condition, leaving residual defects in the sub-surface region. The presence of those residual surface defects limits the Fatigue Resistance when compared to struts with a machined surface. © 2019 Elsevier B.V.
