Failure Analysis of NiTi Wires Used in Medical Applications

2019 ◽  
pp. 349-354
Keyword(s):  
Failure Analysis ◽  
Medical Applications ◽  
Niti Wires

Failure analysis of NiTi wires used in medical applications

2005 ◽  
Vol 5 (5) ◽  
pp. 82-87 ◽  
Author(s):  
B. James ◽  
J. Foulds ◽  
L. Eiselstein
Keyword(s):  
Failure Analysis ◽  
Medical Applications ◽  
Niti Wires

Experimental Tests on Fine Nitinol Wires Used in Medical Applications

2012 ◽  
Vol 188 ◽  
pp. 65-69
Author(s):  
Mihaela Amarandei ◽  
Lucian Bogdan ◽  
Anghel Cernescu ◽  
Liviu Marşavina ◽  
Jenel Marian Pătraşcu ◽  
...  
Keyword(s):  
Surgical Procedures ◽  
Cruciate Ligament ◽  
Tensile Load ◽  
Experimental Tests ◽  
Nickel Titanium ◽  
Medical Applications ◽  
Reconstruction Surgery ◽  
High Elasticity ◽  
Anterior Cruciate ◽  
Niti Wires

Nitinol (NiTi) is a biocompatible nickel titanium alloy widely used in medical applications and devices. In anterior cruciate ligament (ACL) reconstruction surgery of the knee, fine wires of NiTi are used because of its high elasticity and good memory shape behavior. In surgical procedures these wires are exposed to mechanical stress and high deformations. This paper presents the results of the tests performed on fine NiTi wires of 1.1 mm and 0.73 mm in diameter, exposed to tensile load, which frequently appears in orthopedic surgery. The tests were done at a temperature of 37o C, in order to observe the influence of tensile stress on the mechanical properties of NiTi. The obtained material properties are in good correlation with data from manufacturers. These results are useful in durability evaluation of fine NiTi wires utilized in surgical procedures.

Superelastic Thin Film NiTi-Polymer Composites and Sputtered Thin-walled Tubes

2004 ◽  
Vol 855 ◽  
Author(s):  
Holger Rumpf ◽  
Christiane Zamponi ◽  
Christoph Bourauel ◽  
Dieter Drescher ◽  
Eckhard Quandt
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Polymer Composites ◽  
Root Resorption ◽  
Medical Instrumentation ◽  
Medical Applications ◽  
Special Importance ◽  
Thin Walled ◽  
Niti Wires ◽  
Novel Applications

ABSTRACTSuperelastic shape memory materials are of special interest in medical applications due to the large obtainable strains, the constant stress level and their biocompatibility. Superelastic NiTi-polymer-composites have the potential to be used for novel applications in orthodontics and medical instrumentation as well as in certain areas of mechanical engineering. Especially, using NiTi thin films these composites have the potential to substantially reduce those forces compared to conventional NiTi wires and tubes. In orthodontic applications lowering the forces during archwire treatment is of special importance due to tooth root resorption, which can be caused by the application of oversized forces. Furthermore, the use of superelastic materials or composites enables the application of constant forces independent of diminutive tooth movements during the therapy due to the superelastic plateau. Superelastic NiTi thin films have been fabricated by magnetron sputtering using extremely pure cast melted targets. Special heat treatments were performed for the adjustment of the superelastic properties and the transformation temperatures. A superelastic strain exceeding 4% at 36°C was obtained. In this paper the fabrication of superelastic NiTi thin walled tubes by magnetron sputtering is presented and their mechanical properties are compared to conventional wires and tubes in view of orthodontic applications.

scholarly journals Inclusion control and fatigue properties of NiTi wires for medical applications

2014 ◽  
Vol 12 ◽  
pp. 04013 ◽  
Author(s):  
S. Beretta ◽  
A. Cadelli ◽  
A. Coda ◽  
P. Luccarelli ◽  
M. Urbano
Keyword(s):  
Fatigue Properties ◽  
Medical Applications ◽  
Niti Wires ◽  
Inclusion Control

Failure Analysis With the Scanning Electron Microscope

1972 ◽  
Vol 30 ◽  
pp. 482-483
Author(s):  
John R. Devaney
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Integrated Circuits ◽  
Failure Analysis ◽  
High Reliability ◽  
Military Applications ◽  
Small Structure ◽  
Useful Life ◽  
Insight Into ◽  
Scanning Electron

Occasionally in history, an event may occur which has a profound influence on a technology. Such an event occurred when the scanning electron microscope became commercially available to industry in the mid 60's. Semiconductors were being increasingly used in high-reliability space and military applications both because of their small volume but, also, because of their inherent reliability. However, they did fail, both early in life and sometimes in middle or old age. Why they failed and how to prevent failure or prolong “useful life” was a worry which resulted in a blossoming of sophisticated failure analysis laboratories across the country. By 1966, the ability to build small structure integrated circuits was forging well ahead of techniques available to dissect and analyze these same failures. The arrival of the scanning electron microscope gave these analysts a new insight into failure mechanisms.

Using the scanning electron microscope for failure analysis of high density magnetic media

1987 ◽  
Vol 45 ◽  
pp. 392-393
Author(s):  
Evelyn R. Ackerman ◽  
Gary D. Burnett
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Failure Analysis ◽  
High Density ◽  
Magnetic Media ◽  
Specific Data ◽  
Retrieval Systems ◽  
Operating Environments ◽  
The Media ◽  
Scanning Electron

Advancements in state of the art high density Head/Disk retrieval systems has increased the demand for sophisticated failure analysis methods. From 1968 to 1974 the emphasis was on the number of tracks per inch. (TPI) ranging from 100 to 400 as summarized in Table 1. This emphasis shifted with the increase in densities to include the number of bits per inch (BPI). A bit is formed by magnetizing the Fe203 particles of the media in one direction and allowing magnetic heads to recognize specific data patterns. From 1977 to 1986 the tracks per inch increased from 470 to 1400 corresponding to an increase from 6300 to 10,800 bits per inch respectively. Due to the reduction in the bit and track sizes, build and operating environments of systems have become critical factors in media reliability.Using the Ferrofluid pattern developing technique, the scanning electron microscope can be a valuable diagnostic tool in the examination of failure sites on disks.

Review of Research, Comparisons and Medical Applications of Ericksonian Techniques.

1990 ◽  
Vol 35 (2) ◽  
pp. 185-185
Author(s):  
Paul L. Wachtel
Keyword(s):  
Medical Applications

A new type of intrinsic two-way shape-memory effect in hooks of NiTi-wires

2003 ◽  
Vol 112 ◽  
pp. 1177-1180 ◽  
Author(s):  
A. Schuster ◽  
H. F. Voggenreiter ◽  
D. C. Dunand ◽  
G. Eggeler
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
New Type ◽  
Niti Wires
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