A summary of recent research on the nitinol alloys and their potential application in ocean engineering

Buehler, W. J.; Wang, Frederick E.

doi:10.1016/0029-8018(68)90019-x

Cited by 361 publications

(164 citation statements)

References 3 publications

Supporting

Mentioning

156

Contrasting

Unclassified

Order By: Relevance

“…Many of the currently available occlusion devices contain nitinol, an alloy developed in the 1960s by Buehler and Wang. 3 Nitinol is now widely used in medical products because of its superelasticity, radiopacity, thermal shape memory properties, and resistance to fatigue and corrosion; it is composed of 45% titanium and 55% nickel. Ries and colleagues demonstrated a systemic rise in serum levels of nickel after device implantation and cautioned that possible biologic side effects might have clinical relevance particularly in patients with nickel hypersensitivity.…”

Section: Discussionmentioning

confidence: 99%

Unusual Presentation of Nickel Allergy Requiring Explantation of an Amplatzer Atrial Septal Occluder Device

Rabkin¹,

Whitehead²,

Michaels³

et al. 2009

Clinical Cardiology

View full text Add to dashboard Cite

Systemic allergic reaction to a percutaneous patent foramen ovale (PFO) occlusion device is a rare event with only scattered reports in the literature. Serious allergic reactions to these devices have a poorly defined incidence, presentation, and natural history. We present a woman with a previously unknown nickel allergy who developed severe chest pain beginning the morning after percutaneous device closure of the PFO. Despite multiple visits to her cardiologists and primary care physicians, the cause of her chest pain remained unclear. After seeking a second opinion at our medical center, skin testing showed a severe reaction to nickel. These symptoms were refractory to treatment until device explantation 18 mo later. This case highlights the importance of recognizing nickel allergy as a cause of chest pain following implantation of certain types of devices used for closure of PFOs and other heart defects. IntroductionSystemic allergic reaction to a percutaneous patent foramen ovale (PFO) occlusion device is a rare event with only scattered reports in the literature 1,2 and a poorly defined incidence, presentation, and natural history. We present a patient with a previously unknown nickel allergy who developed severe chest pain beginning the morning after percutaneous device closure of the PFO, which persisted until device explantation 18 mo later. The case is described and therapeutic implications discussed.

show abstract

Section: Discussionmentioning

confidence: 99%

Unusual Presentation of Nickel Allergy Requiring Explantation of an Amplatzer Atrial Septal Occluder Device

Rabkin¹,

Whitehead²,

Michaels³

et al. 2009

Clinical Cardiology

View full text Add to dashboard Cite

show abstract

“…Several properties of austenite NiTi and martensite NiTi are notably different (23,24). When martensite NiTi is heated, it begins to change into austenite.…”

mentioning

confidence: 99%

Current Challenges and Concepts of the Thermomechanical Treatment of Nickel-Titanium Instruments

Shen

Zhou

Zheng

et al. 2013

Journal of Endodontics

449

438

View full text Add to dashboard Cite

Introduction: The performance and mechanical properties of nickel-titanium (NiTi) instruments are influenced by factors such as cross-section, flute design, raw material, and manufacturing processes. Many improvements have been proposed by manufacturers during the past decade to provide clinicians with safer and more efficient instruments. Methods: The mechanical performance of NiTi alloys is sensitive to their microstructure and associated thermomechanical treatment history. Heat treatment or thermal processing is one of the most fundamental approaches toward adjusting the transition temperature in NiTi alloy, which affects the fatigue resistance of NiTi endodontic files. The newly developed NiTi instruments made from controlled memory wire, M-Wire (Dentsply Tulsa Dental Specialties, Tulsa, OK), or R-phase wire represent the next generation of NiTi alloys with improved flexibility and fatigue resistance. The advantages of NiTi files for canal cleaning and shaping are decreased canal transportation and ledging, a reduced risk of file fracture, and faster and more efficient instrumentation. The clinician must understand the nature of different NiTi raw materials and their impact on instrument performance because many new instruments are introduced on a regular basis. Results: This review summarizes the metallurgical properties of next-generation NiTi instruments, the impact of thermomechanical treatment on instrument flexibility, and the resistance to cyclic fatigue and torsion. Conclusions: The aim of this review was to provide clinicians with the knowledge necessary for evidence-based practices, maximizing the benefits from the selection and application of NiTi rotary instruments for root canal treatment. (J Endod 2013;39:163-172)

show abstract

“…In terms of flexion fatigue, it is allegedly superior to stainless steel [28]. Nevertheless, shape-memory metal is known to be a notchsensitive material [7,8]. In this study both rod breakages occurred close to where the rod was connected to the bridge.…”

Section: Discussionmentioning

confidence: 67%

Scoliosis correction with shape-memory metal: results of an experimental study

et al. 2001

View full text Add to dashboard Cite

IntroductionOperations for scoliosis are designed to correct the deformity and to prevent its progression by achieving a solid fusion. In 1962, Harrington introduced the use of spinal instrumentation for the surgical treatment of scoliosis [16]. In the 1980s, the development of spinal instrumentation expanded considerably. New anterior and posterior systems were introduced [2,6,10,12,18,32]. With these advanced segmental systems, better corrections are possible in the coronal and the sagittal plain in comparison with Harrington instrumentation. However, the literature is contradictory on the effect on axial rotation and rib cage deformity. In most literature it is suggested that axial plane correction is limited [13,19,21,33].Abstract The biocompatibility and functionality of a new scoliosis correction device, based on the properties of the shape-memory metal nickel-titanium alloy, were studied. With this device, the shape recovery forces of a shape-memory metal rod are used to achieve a gradual threedimensional scoliosis correction. In the experimental study the action of the new device was inverted: the device was used to induce a scoliotic curve instead of correcting one. Surgical procedures were performed in six pigs. An originally curved squared rod, in the cold condition, was straightened and fixed to the spine with pedicle screws. Peroperatively, the memory effect of the rod was activated by heating the rod to 50°C by a low-voltage, high-frequency current. After 3 and after 6 months the animals were sacrificed. The first radiographs, obtained immediately after surgery, showed in all animals an induced curve of about 40°Cobb angle -the original curve of the rod. This curve remained constant during the followup. The postoperative serum nickel measurements were around the detection limit, and were not significantly higher compared to the preoperative nickel concentration. Macroscopic inspection after 3 and 6 months showed that the device was almost overgrown with newly formed bone. Corrosion and fretting processes were not observed. Histologic examination of the sections of the surrounding tissues and sections of the lung, liver, spleen and kidney showed no evidence of a foreign body response. In view of the initiation of the scoliotic deformation, it is expected that the shape-memory metal based scoliosis correction device also has the capacity to correct a scoliotic curve. Moreover, it is expected that the new device will show good biocompatibility in clinical application. Extensive fatigue testing of the whole system should be performed before clinical trials are initiated.

show abstract

A summary of recent research on the nitinol alloys and their potential application in ocean engineering

Cited by 361 publications

References 3 publications

Unusual Presentation of Nickel Allergy Requiring Explantation of an Amplatzer Atrial Septal Occluder Device

Unusual Presentation of Nickel Allergy Requiring Explantation of an Amplatzer Atrial Septal Occluder Device

Current Challenges and Concepts of the Thermomechanical Treatment of Nickel-Titanium Instruments

Scoliosis correction with shape-memory metal: results of an experimental study

Contact Info

Product

Resources

About