The aim of the present study was to determine whether used orthodontic wires made of different materials cause toxicity and loss of viability on three-dimensional (3D) cell cultures. Three types of orthodontic wires, stainless steel, Nitinol, and TMA (n = 9) which had been used clinically in fixed appliances for a period of 1 month, were retrieved at random from five patients. Both upper and lo...

SEE PAGE 950 T he optimal endovascular strategy for treatment of superficial femoral artery (SFA) atherosclerotic disease is an evolving area of research and clinical practice. Initial randomized trials demonstrated a benefit of nitinol self-expanding stent placement in this region when compared to standalone balloon angioplasty (1). However, observational studies subsequently raised concerns r...

Nitinol, a near equiatomic intermetallic of nickel and titanium, is the most widely known and used shape memory alloy. Owing to its capacity to undergo a thermal or stress induced martensitic phase transformation, Nitinol displays recoverable strains that are more than an order of magnitude greater than in traditional alloys, specifically as high as 10%. Since its discovery in the 1960s, Nitino...

Nickel-titanium alloy (Nitinol) is an excellent shape memory (SMA) for microelectro-mechanical systems (MEMS) particularly in biomedical applications owing to its three features effect (SME), superelasticity, and biocompatibility. The temperature-dependent material transformation properties of Nitinol SMAs make conventional machining difficult. Micro-ECM, a non-conventional process conductive m...

Postopereative sternal dehiscence is one of the most important complications of median sternotomy which may cause pulmonary dysfunction and mediastinitis. We are reporting a patient with sternal dehiscence after coronary artery bypass surgery that underwent application of thermoreactive nitinol clips in addition to Robicsek procedure. Using thermoreactive nitinol clips method together with Robi...

A s endovascular therapy has revolutionized the treatment of lower extremity peripheral arterial disease (PAD) over the past decade, no single therapy has emerged as the clear gold standard. Acceptance of endovascular therapy has been quick among practitioners, but there remains question about which technology is best and most durable in any particular vascular bed. As techniques and technology...

Full-field quantitative strain maps of phase transformation and plasticity in Nitinol under large sheardominated deformation are presented. To achieve a sheardominated deformation mode with relatively uniform stresses and strains, a shear compression specimen (SCS) geometry was utilized. Shear deformation appears to impede the development of the strain localization during phase transformation t...

Recent advances in endoscopic therapeutics allow conditions such as fistulas of the digestive system to be treated endoscopically. These cases were recently managed with surgery. The Padlock® system includes a nitinol clip that was recently introduced for endoscopic therapy. There are few reports with regard to its use in the daily clinical practice. We report a case of a colonic fistula that w...

Nitinol, a nickel titanium alloy, is widely used as a biocompatible metal with applications in high strain medical devices. The alloy exhibits both superelasticity and thermal shape memory behaviour. Basic mechanical properties can be established and are provided by suppliers; however the true stress-strain response under repeated load is not fully understood. It is essential to know this behav...