When was Nitinol first used?
When was Nitinol first used?
In 1988, a nickel-titanium alloy [184][185][186], known as nitinol, was introduced to produce endodontic tools. Nitinol’s name is an acronym for Nickel Titanium-Naval Ordnance Laboratory, where this alloy was discovered in 1959 [187][188][189] [190] .
Where did Nitinol come from?
The word Nitinol is derived from its composition and its place of discovery: (Nickel Titanium-Naval Ordnance Laboratory). William J. Buehler along with Frederick Wang, discovered its properties during research at the Naval Ordnance Laboratory in 1959.
Why was Nitinol invented?
Nitinol was discovered by a brilliant young scientist named William J. Buehler. Buehler was a metallurgist at the Naval Ordinance Labs (NOL), working on a project to develop a nose cone for the Polaris missile that was capable of withstanding the heat of re-entry into the Earth’s atmosphere.
Why does Nitinol remember its shape?
However, when the alloy is heated through its transformation temperatures, it reverts to austenite and recovers its previous shape with great force. This process is known as shape memory.
What is nitinol stent?
Nitinol stents are manufactured to a size slightly larger than the target vessel size and delivered constrained in a delivery system. After deployment, they position themselves against the vessel wall with a low, “chronic” outward force. They resist outside forces with a significantly higher radial resistive force.
What is Nitinol mainly used for?
Nitinol is used to manufacture catheter tubes, guidewires, stone retrieval baskets, filters, needles, dental files and archwires and other surgical instruments (6). A particularly important use of Nitinol is in stents.
What is the main property of Nitinol?
Nitinol is a metal alloy of nickel and titanium with unique properties, including superelasticity or pseudoelasticity and “shape memory” properties. That means nitinol can remember its original shape and return to it when heated. It also shows great elasticity under stress.
Why is Nitinol used in stents?
Most PAD stents therefore are made of self-expandable shape memory Nitinol that allows the device to expand to a pre-set shape once released from the catheter without the assistance of a balloon, and, most importantly, return to this shape after being deformed during limb flexion.
What is special about Nitinol?
Why are stents made of Nitinol?
Where are Nitinol stents used?
Consequently, the mechanical behavior of Nitinol under multiaxial conditions remains poorly understood. Nevertheless, because of these unique mechanical characteristics, in combination with excellent biocompatibility, Nitinol is used as self-expanding endovascular stents to scaffold diseased peripheral arteries.
What is Nitinol stent?
