Assessment of wrought ASTM F1058 cobalt alloy properties for permanent surgical implants

Abstract

The behavior of the ASTM F1058 wrought cobalt-chromium-nickel-molybdenum-iron alloy (commonly referred to as Elgiloy or Phynox) is evaluated in terms of mechanical properties, magnetic resonance imaging, corrosion resistance, and biocompatibility. The data found in the literature, the experimental corrosion and biocompatibility results presented in this article, and its long track record as an implant material demonstrate that the cobalt superalloy is an appropriate material for permanent surgical implants that require high yield strength and fatigue resistance combined with high elastic modulus, and that it can be safely imaged with magnetic resonance.

The evolution of cardiovascular stent materials and surfaces in response to clinical drivers: A review

“…This led to the initial introduction of cobalt-chromium materials for balloon-expandable stents. It is worth noting that cobalt-chromium alloys were already being used for stents for many years before this [5], where the high elastic modulus enabled the creation of the self-expanding Wallstent Ò (Boston Scientific Corp., Natick, MA).…”

Artifacts of Vena Cava Filters ex vivo on MR Angiography

“…1,2,[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Many types of guide wires and catheters have been investigated in ultrafast MR imaging. 19 Although we found several articles about MRA of vascular stents, [20][21][22][23][24] reports evaluating the Simon nitinolˆlter with non-contrast MRA are limited.…”

“…Permanent surgical Phynox implants can be imaged safely with magnetic resonance. 15 Nitinol is a nickel-titanium alloy with a thermal shape memory. 27 Nitinol is also one of the best-suited metals for use with MR imaging.…”

Surface engineered titanium alloys for biomedical devices

“…Crevice corrosion is encountered beneath the heads of fixing screws made of 316L stainless steel, and mechanicallyassisted crevice corrosion of modular total hip arthroplasty components has been associated with elevated levels in serum of cobalt and urine chromium (Jones et al, 2000). Pitting corrosion of cobalt-based alloys leads to the release of carcinogens into the body (Clerc et al, 1997;Blackwood, 2003).…”