Failure analysis of retrieved cemented total knee prostheses

Halvorson, Thomas L.; Cook, Stephen D.; Brinker, Mark R.; Thomas, Kevin A.; Sandborn, Patricia M.

doi:10.1016/0267-6605(89)90013-9

Cited by 2 publications

(2 citation statements)

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“…Fatigue failures of medical implants are both undesirable and well documented 1,2 . The decrease in fatigue strength of implant materials when exposed to corrosion conditions is equally well known 3,4 .…”

Section: Introductionmentioning

confidence: 99%

“…Fatigue failures of medical implants are both undesirable and well documented. 1,2 The decrease in fatigue strength of implant materials when exposed to corrosion conditions is equally well known. 3,4 There are, however, very few reports of in vitro simulations of the effect of body fluids on the fatigue characteristics of implants manufactured by AM or directed energy deposition (DED) techniques.…”

Section: Introductionmentioning

confidence: 99%

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Corrosion fatigue of Ti‐6Al‐4V coupons manufactured by directed energy deposition

Hattingh

Botha

Bernard

et al. 2022

Fatigue Fract Eng Mat Struct

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Titanium is a versatile biocompatible metal that is desirable in additively manufactured medical implant devices. However, additively manufactured parts have particular microstructures, porosity, residual stress, and surface conditions which can have a strong impact on fatigue performance. Implants have an added complexity from the saline operating environment and the associated impact on the safe design life. Equally, direct energy deposition induces a complex thermal history which, if not carefully controlled, can significantly alter the mechanical/material properties of the component. This study investigates the decrease in fatigue life, in an in vitro body fluid simulation using Ringer's solution, observed in Ti-6Al-4V specimens extracted from coupons manufactured by directed energy deposition. An interrupted deposition strategy was employed to control build regularity, which appeared to influence certain mechanical properties, including corrosion fatigue life. An ≈50% decrease in fatigue life was observed in Ringer's solution at 6 Hz loading frequency, clearly important in designing implants.

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Section: Introductionmentioning

confidence: 99%