Fretting corrosion studies of universal femoral head prostheses and cone taper spigots

Early Corrosion-Related Failure of the Rejuvenate Modular Total Hip Replacement

“…Similarly, several case reports have demonstrated good clinical results with surgical exchange of a Co-Cr to a Tibased neck implant 28,29 . This phenomenon has also been reported for modular heads with head-neck corrosion 12,30,31 . The Ti alloy, unlike the Co-Cr alloy, is not susceptible to fretting damage 32,33 .…”

Proximal Component Modularity in THA—At What Cost?: An Implant Retrieval Study

“…Even though the analysis of micro-CT data of representative samples showed good congruency, crevices remain that may be subject to crevice corrosion or mechanically assisted crevice corrosion in the presence of fretting. In vitro studies described an insignificant amount of corrosion and fretting at the modular head-stem junction [9,22] while a similar in vitro study of the effect of machine surface finish on fretting and corrosion showed a negative correlation with surface roughness but also concluded the degree of degradation is ''within a clinically non-critical range'' [17]. These studies are in direct contrast to our study where revision of some devices can be attributed to degradation at the neck-stem taper junction.…”

Failure mechanisms in CoCrMo modular femoral stems for revision total hip arthroplasty

“…The biocompatibility and in vivo performance of CoCrMo alloys have not been the major issues in the past decades because the dense passivation layer of chromium oxide on the surface protects metal from releasing. However, with the increased use of modular design in which two similar or dissimilar metal components are press‐fit together in hip implants, corrosion of CoCrMo alloys at the modular interfaces has been widely observed and has been associated with adverse local tissue reactions and thus the high percentage of early implant failure . So far, most of the studies have focused on the biological consequences of CoCrMo alloy corrosion at modular interfaces; its impact to the mechanical performance of the implants has been far less investigated.…”

“…However, with the increased use of modular design in which two similar or dissimilar metal components are press-fit together in hip implants, corrosion of CoCrMo alloys at the modular interfaces has been widely observed and has been associated with adverse local tissue reactions and thus the high percentage of early implant failure. [5][6][7][8][9][10][11][12] So far, most of the studies have focused on the biological consequences of CoCrMo alloy corrosion at modular interfaces; its impact to the mechanical performance of the implants has been far less investigated. Due to the complicated loading and challenging biological environment in the human body, in vitro experiments could not accurately predict implant performance in vivo.…”