Comparison of Cyclic Fatigue Resistance of Novel TruNatomy Files with Conventional Endodontic Files: An In Vitro SEM Study

Murugesan, Sabari; Kumar, Vinoth; Reddy, N Bharath Naga; Basheer, Syed Nahid; Kumar, Rajeswary; Saravanan, S.

doi:10.5005/jp-journals-10024-3177

Cited by 6 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 37 38 ] The cause of this decreased fatigue resistance of NeoEndo Flex could be attributed to the design of these files, no radial land with sharp cutting edges and triangular cross-section that may hasten the screwing effect hence early breakage. [ 39 40 ] The cross-sectional design influences the fatigue resistance of NiTi rotary file as it determines the bulk of metal mass, thus making the file stiffer. Previous studies reveal that triangular cross-sections have less metal mass and have increased fatigue resistance than square cross-sectional design, which are in disagreement with the results of the present study.…”

Section: Discussionmentioning

confidence: 99%

“…This observation revealed that the tested instruments were correctly positioned in canal curvature and demonstrated that the similar stresses were induced during cyclic fatigue testing. [ 39 43 ] Therefore, the point of maximum stress concentration was located 3.5–4 mm from the tip of the each NiTi rotary file in the apical one-third of the curved root canal. [ 44 ]…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Comparative evaluation of cyclic fatigue resistance of thermomechanically treated NiTi rotary instruments in simulated curved canals with two different radii of curvature: An in vitro Study

Hamid,

Malik,

Kumar

et al. 2024

Journal of Conservative Dentistry and Endodontics

View full text Add to dashboard Cite

Background: This study aimed to compare the effect of heat treatment on the cyclic fatigue resistance of three different nickel–titanium rotary file systems: TruNatomy, HyFlex CM, and NeoEndo flex in simulated curved canals at two different radii of curvatures. Materials and Methods: A total of 60 NiTi rotary files of three types were used, and the samples were divided into three groups TruNatomy, HyFlex CM, and NeoEndo flex. All the instruments were subjected to cyclic fatigue testing using a stainless steel custom-made canal model with a 60° angle of curvature and two radii of curvature 5 mm and 3 mm; the number of cycles to fracture and length of the fractured segment was measured. The separated instruments were subjected to fractographic analysis under scanning electron microscope. Results: The number of cycles to failure to fracture a file at a 3 mm radius of curvature is significantly less as compared to a 5 mm radius of curvature (HCM > TRN > NE). Conclusion: Within the limitation of the present study, there was a positive correlation between the radius of curvature and fatigue life of NiTi files.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Comparative evaluation of cyclic fatigue resistance of thermomechanically treated NiTi rotary instruments in simulated curved canals with two different radii of curvature: An in vitro Study

Hamid,

Malik,

Kumar

et al. 2024

Journal of Conservative Dentistry and Endodontics

View full text Add to dashboard Cite

show abstract

“…had standard deviation of 13.35, 62.81, and 165.02 for PG, HEDM, and TN. [ 23 24 ] This variance highlights the lack of standardization in cyclic fatigue tests, possibly due to fabrication quality variation of NiTi instruments and testing methodology discrepancies.…”

Section: Discussionmentioning

confidence: 99%

Analysis of cyclic fatigue resistance of different endodontic nickel–titanium rotary instruments: An in vitro study

Langaliya,

Patel,

Pallipurath

et al. 2024

Journal of Conservative Dentistry and Endodontics

View full text Add to dashboard Cite

Aims: The aim of this in vitro study was to compare the cyclic fatigue resistance of three different endodontic nickel–titanium rotary instruments using a dynamic testing device. Materials and Methods: Ten files each of ProTaper Gold (PG), Hyflex Electro-discharge Machining (HEDM), and TruNatomy (TN) were tested in a custom-fabricated dynamic cyclic fatigue testing device at 60° curvature having a radius of curvature of 5 mm. The number of cycles to the fracture (NCF) of each instrument was calculated and three continuous groups were compared by the Kruskal–Wallis test and Dunn post hoc test was used for pairwise comparison. Results: Cyclic fatigue resistance of HEDM was the highest, followed by TN. PG had the lowest among the three. Conclusion: Within the limitations of the present in vitro results, it can be concluded that HEDM files appeared to be suitable for shaping complex canals with the greater number of cycles before it fractures.

show abstract

“…The TruNatomy system, one notable minimally invasive file system, was reported to have increased cyclic fatigue resistance using a thin-shaft and heat-treated alloy [20]. Reddy et al [38] reported that the TN system had better fatigue resistance than the ProTaper Gold system, made of a gold alloy, although Elnaghy et al [39] reported that TN showed a lower fatigue resistance than the HyFlex CM instruments (DS Dental) made of CM-wire [19,38,39]. These findings might result from the difference in heat treatment as well as the geometric characteristics [35].…”

Section: Discussionmentioning

confidence: 99%

Effect of Different Heat Treatments and Surface Treatments on the Mechanical Properties of Nickel-Titanium Rotary Files

Hong,

Kwak,

et al. 2023

Metals

View full text Add to dashboard Cite

This study aimed to compare the fatigue resistance of files made from different heat treatment methods and surface treatment. Four prototype files were created through heat treatment and titanium coating surface treatment (AT, DT, ER, EN; named arbitrarily by the manufacturer) at different times and temperatures. Artificial canals with curvatures of 45- and 90-degree were used for the fatigue testing. The files were operated at the speed of 500 rpm at 37 °C, and the time until fracture incurred by a 4-mm dynamic pecking motion at a speed of 8 mm/s was measured, and the number of cycles to failure (NCF) was calculated by applying rotation speed and time. The length of the fractured fragment was measured. The fractured specimens were observed under the SEM to compare the characteristics of fatigue fracture patterns. Differential scanning calorimetry analysis was performed to estimate the phase transformation temperature. One-way ANOVA with Duncan’s post-hoc comparison, the Kruskal–Wallis test, and Mann–Whitney U were applied to compare the fatigue resistance among the prototypes at a significance level of 95%. Regardless of the canal angle, the EN showed the highest fatigue resistance (p < 0.05). AT had the lowest NCF at the 90-degree canal (p < 0.05). ER had a higher NCF than the DT at 45 degrees (p < 0.05), but there was no difference at 90 degrees. DSC analysis revealed that the ER and EN groups exhibited two austenite peaks above 40 °C. In conclusion, the file that underwent a specific temperature heat treatment with titanium coating surface treatment showed the highest fatigue resistance.

show abstract

Comparison of Cyclic Fatigue Resistance of Novel TruNatomy Files with Conventional Endodontic Files: An In Vitro SEM Study

Cited by 6 publications

References 24 publications

Comparative evaluation of cyclic fatigue resistance of thermomechanically treated NiTi rotary instruments in simulated curved canals with two different radii of curvature: An in vitro Study

Comparative evaluation of cyclic fatigue resistance of thermomechanically treated NiTi rotary instruments in simulated curved canals with two different radii of curvature: An in vitro Study

Analysis of cyclic fatigue resistance of different endodontic nickel–titanium rotary instruments: An in vitro study

Effect of Different Heat Treatments and Surface Treatments on the Mechanical Properties of Nickel-Titanium Rotary Files

Contact Info

Product

Resources

About