Potential Applications of Certain Nickel-Titanium (Nitinol) Alloys

Civjan, Simon; Huget, Eugene F.; DeSimon, Laszlo B.

doi:10.1177/00220345750540014301

Cited by 120 publications

(68 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These devices are made of pseudo-elastic alloy of nickel and titanium (Nitinol 55) and have an incredible influence on the mechanical preparations of root canals (1). The instrumentation of narrow and curved root canals can be challenging for many clinicians.…”

Section: Introductionmentioning

confidence: 99%

Influence of an Innovative Anti-Corrosive Solution on Resistance of Endodontic NiTi Rotary Instruments: A Preliminary Study

Saghiri¹,

Asatourian²,

Godoy³

2017

Eur Endod J

View full text Add to dashboard Cite

Objective:To evaluate the effects of deionised water, blood, phosphate-buffered saline (PBS) and a new anti-corrosive solution based on methoxy propyl amine (MOPA) on the cyclic fatigue resistance of endodontic NiTi rotary instruments under in vitro conditions. Methods: Forty ProTaper F1 files were provided and divided to four groups (n=10). Samples were first autoclaved and then stored in deionised water, blood, PBS or MOPA for 24 hours. Cyclic fatigue was tested with a custom-made stainless-steel block including artificial canals (curvature angle=30 degree, radius of curvature=5 mm). After immersion in test solutions, samples were rotated 300 rpm until fracture occurred. The number of cycles to failure (NCF) was calculated using recorded fracture time. Results: Data were analysed by the Kolmogorov-Smirnov, Levene, ANOVA and Scheffe statistical tests. Samples in blood group showed the lowest and samples in MOPA group showed the highest NCF values. Significant difference was observed between groups (p=0.001). NCF value of PBS group was significantly more than the NCF values of samples in blood and deionised water groups (p<0.05). Conclusion:The tested novel anti-corrosive solution significantly increased the fracture resistance of the endodontic NiTi rotary instruments by reducing the cyclic fatigue. In contrast, blood and deionised water caused more corrosion and resulted in earlier file fracture. Keywords: anti-corrosion, cyclic fatigue, NCF, NiTi rotary INTRODUCTIONThe advent of NiTi rotary instruments to the field of endodontic was a revolutionary change. These devices are made of pseudo-elastic alloy of nickel and titanium (Nitinol 55) and have an incredible influence on the mechanical preparations of root canals (1). The instrumentation of narrow and curved root canals can be challenging for many clinicians. Walia et al. showed that Nitinol files are at least two to three times more flexible than stainless steel (SS) files (2). The flexibility can enable the instrument to be used in curved and complex root canals with more facility and lower root canal shape alterations (3).Many investigators have shown that the unexpected separation of NiTi rotary instruments, apart from higher strength and flexibility, remains a clinical challenge. This undesirable event can occur without any significant deformation seen on the surface of instrument (4). Different causes, such as cyclic fatigue, static and dynamic torsional fatigues, have been attributed to the fracture of these devices (5). Cyclic fatigue is described by the alternating tension and compression cycles, which occur inside the structure of an instrument when it is moving through the maximum curvature of root canal (6). The cyclic fatigue is generally a concern in curved canals, and the many ABSTRACT HIGHLIGHTS• Deionized water and blood can negatively influence the structure of NiTi made devices. • Methoxy propyl amine (MOPA) novel solution is an anti-corrosive agent, which can increase the cyclic fatigue resistance and delay separation of NiTi made rotary...

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of an Innovative Anti-Corrosive Solution on Resistance of Endodontic NiTi Rotary Instruments: A Preliminary Study

Saghiri¹,

Asatourian²,

Godoy³

2017

Eur Endod J

View full text Add to dashboard Cite

show abstract

“…Dental prostheses are generally made by precision casting. Although casting Ti-Ni alloy is difficult using conventional dental casting techniques, 14) advances in dental casting technology for titanium alloys has made it possible to cast Ti-Ni alloy with super-elasticity. [15][16][17] Dental prostheses are used under repetitive stress conditions and studies of the fatigue property of Ti-Ni alloy castings showed superior fatigue property in a placementand-removal test 18) and a tensile test.…”

Section: Introductionmentioning

confidence: 99%

Bending Property of Super-Elastic Ti-Ni Alloy Dental Castings with Different Heat Treatments

et al. 2007

View full text Add to dashboard Cite

Bending property of Ti-Ni alloy dental castings was evaluated in comparison with that of Co-Cr alloy in a cantilever test. Heat treatment effect on the bending property was also investigated in relation to phase transformation. Ti-50.85Ni (mol%) alloy was used, and the shape of bending test specimens was half-rounded in cross section, 2.0 mm in diameter. The bending test was carried out at 310 K. Distance between the loading point and the grip edge was 5.0 or 10.0 mm. Maximum bending deflection was 0.50 mm. Thermal behavior accompanying phase transformation of Ti-Ni alloy was examined by differential scanning calorimetry. Load-deflection diagrams of Ti-Ni alloy castings in the bending test showed elastic and super-elastic deformation, while those of Co-Cr castings showed elastic and permanent deformation. Maximum bending load and residual deflection of the Ti-Ni castings were lower than those of the Co-Cr castings and were decreased by heat treatment under a high-stress condition at the 5-mm loading point. Transformation temperature was increased by heat treatment, which was thought to influence the change in bending property. Super-elasticity of the Ti-Ni alloy castings in bending was shown to be improved by heat treatment, offering the potential to improve the design and clinical performance of cast dental prostheses.

show abstract

“…하지만 크로로포름은 가장 안 정적이며 효과적이다는 보고도 있다 7,8) . 니켈 티타늄 파일은 Civijan 등 9) 이 처음으로 근관치료 영 역에서 사용을 제안한 이래, 1988년 Walia 등 10) 에 의해 근 관 형성용 파일이 제작되면서 니켈 티타늄 파일은 스테인리 스 강 파일을 대신하여 광범위하게 사용되기 시작하였다. 니켈 티타늄 파일은 스테인리스 강 파일에 비해 높은 생체 친화성과 부식저항성 및 2�3배의 고탄력성을 가진다 10,11) .…”

unclassified

The effect of gutta-percha removal using nickel-titanium rotary instruments

Jeon

Min

Hwang

2004

J Korean Acad Conserv Dent

View full text Add to dashboard Cite

The purpose of this study was to quantify the amount of remaining gutta-percha/sealer on the walls of root canals when three types of nickel-titanium rotary instruments (Profile, ProTaper and K 3 ) and a hand instrument(Hedstrom file) used to remove these materials.The results of this study were as follows: 1. In the total time for gutta-percha removal, Profile group was the fastest and followed by K 3 , Protaper, Hedstrom file group. 2. In case of the evaluation of the volume of remained gutta-percha from radiograph, K 3 group got the highest score and followed by Protaper, Hedstrom file, Profile group in the apical 1/3. 3. In case of the evaluation of the volume of gutta-percha remained from stereomicroscope, K 3 group got the highest score and followed by Protaper, Hedstrom file, Profile group in the apical 1/3. These results showed that instrumentation using nickel-titanium rotary instrument groups was faster than that using hand instrument group. The effect of gutta-percha removal using Profile group was better than that using Protaper and K 3 group in the nickel-titanium rotary instrument groups. [J Kor Acad Cons Dent 29(3):212-218, 2004]

show abstract

Potential Applications of Certain Nickel-Titanium (Nitinol) Alloys

Cited by 120 publications

References 10 publications

Influence of an Innovative Anti-Corrosive Solution on Resistance of Endodontic NiTi Rotary Instruments: A Preliminary Study

Influence of an Innovative Anti-Corrosive Solution on Resistance of Endodontic NiTi Rotary Instruments: A Preliminary Study

Bending Property of Super-Elastic Ti-Ni Alloy Dental Castings with Different Heat Treatments

The effect of gutta-percha removal using nickel-titanium rotary instruments

Contact Info

Product

Resources

About