Surface and subsurface changes as a result of tribocorrosion at the stem-neck interface of bi-modular prosthesis

Bryant, Michael; Buente, D.; Oladokun, A; Ward, Michael B.; Huber, Gerd; Morlock, Michael M.; Neville, Anne

doi:10.1016/j.biotri.2017.02.002

Cited by 16 publications

(19 citation statements)

References 39 publications

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“…4 and 5 ). These findings are in agreement with recent research 25 , 27 . In addition, in this current study, the small size of the probe of the contact profilometer allowed us to capture complementary patches on the surfaces of the female taper, the localized removal of the TMZF alloy that had been transferred from the surfaces of the female taper of the stem onto the surface of the necks.…”

Section: Discussionsupporting

confidence: 94%

“…4 ). It appears that, during in vivo function, the high stresses transmitted to the taper junction have led to material transfer of the titanium alloy on the cobalt-chromium alloy in areas of zero or partial slip fretting regime 27 . Although there were extensive areas of metal removal all around the patches on the neck male parts, this was not seen on the female counterparts.…”

Section: Discussionmentioning

confidence: 99%

“…Although there were extensive areas of metal removal all around the patches on the neck male parts, this was not seen on the female counterparts. This could be partially explained by the increase in interfacial hardness of the TMZF alloy when coupled with the cobalt-chromium alloy 27 . Distribution of taper damage was random and more superficial on the surfaces of the female stem tapers, confirming the process of the hardening of the titanium alloy.…”

Section: Discussionmentioning

confidence: 99%

“…We focused on the examination of the conical-shaped aspects of the neck male tapers, which constitute three-fourths of the whole taper, excluding the flat sides, as they have been shown to be the area in which the damage is predominantly localized 13 , 25 , 27 .…”

Section: Methodsmentioning

confidence: 99%

“…It has been shown that tribocorrosion is the predominant mechanism for metal release from the conical-shaped aspects of the neck male tapers and that the time to revision plays a role in the progression of taper damage 25 . Taper design 26 and material combination 27 have been identified as potential factors in neck-stem taper corrosion. However, the clinical symptoms related to the failure of this design are not fully understood.…”

mentioning

confidence: 99%

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Retrieval Findings of Recalled Dual-Taper Hips

Laura

Hothi

Henckel

et al. 2018

The Journal of Bone and Joint Surgery

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Background:The recent high-profile recalls of several dual-taper hip designs pose questions regarding why those designs perform poorly. We aimed to characterize taper damage in 1 recalled design to understand failure mechanisms to inform surgeons on which patients should be considered at risk of revision and when to revise.Methods:High-precision measurement equipment was used to characterize the metal loss from the neck-stem interface of 116 retrieved Rejuvenate femoral stems (Stryker Howmedica Osteonics) revised because of an adverse reaction to metal debris. Head-neck taper surfaces were also investigated, and clinical and laboratory data were examined.Results:The neck-stem junction of each implant was moderately to severely corroded and showed a characteristic wear pattern on both male and female taper surfaces. The severity of taper damage was positively correlated with time to revision (coefficient, 0.040 [95% confidence interval (CI), 0.028 to 0.051]; p < 0.0001) and with serum cobalt concentration (coefficient, 0.02 [95% CI, 0.01 to 0.02]; p < 0.0001) and serum chromium concentration (coefficient, 0.04 [95% CI, 0.009 to 0.070]; p = 0.0142).Conclusions:A forensic examination of the retrieved components that failed secondary to an adverse reaction to metal debris showed, in all cases, visible corrosion. Of the implant and patient factors investigated, we did not identify any predictors of corrosion. The severity of damage was found to increase with time; cobalt was significantly elevated over chromium.Clinical Relevance:Surgeons should scrupulously follow and consider revision for patients with this implant design to avoid extensive tissue excision. Blood metal ion tests may aid in identifying the mechanisms of taper corrosion.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

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Retrieval Findings of Recalled Dual-Taper Hips

Laura

Hothi

Henckel

et al. 2018

The Journal of Bone and Joint Surgery

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Atomic Scale Origin of Metal Ion Release from Hip Implant Taper Junctions

et al. 2020

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Millions worldwide suffer from arthritis of the hips, and total hip replacement is a clinically successful treatment for end‐stage arthritis patients. Typical hip implants incorporate a cobalt alloy (Co–Cr–Mo) femoral head fixed on a titanium alloy (Ti‐6Al‐4V) femoral stem via a Morse taper junction. However, fretting and corrosion at this junction can cause release of wear particles and metal ions from the metallic implant, leading to local and systemic toxicity in patients. This study is a multiscale structural‐chemical investigation, ranging from the micrometer down to the atomic scale, of the underlying mechanisms leading to metal ion release from such taper junctions. Correlative transmission electron microscopy and atom probe tomography reveals microstructural and compositional alterations in the subsurface of the titanium alloy subjected to in vitro gross‐slip fretting against the cobalt alloy. Even though the cobalt alloy is comparatively more wear‐resistant, changes in the titanium alloy promote tribocorrosion and subsequent degradation of the cobalt alloy. These observations regarding the concurrent occurrence of electrochemical and tribological phenomena are vital to further improve the design and performance of taper junctions in similar environments.

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Interfacial compliance, energy dissipation, frequency effects, and long‐term fretting corrosion performance of Ti‐6Al‐4V/CoCrMo interfaces

Smith

Gilbert

2021

J Biomedical Materials Res

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Fretting corrosion in modular orthopedic implants is a well‐documented process that may be associated with adverse local tissue reactions, pain, and revisions. Engineering modular junction interfaces to withstand applied fretting motion without surface abrasion could prevent implant degradation and surface damage. Previous work on geometrically modified Ti‐6Al‐4V/CoCrMo interfaces with increased compliance showed reduced fretting currents and surface damage during short term, variable‐load in vitro testing. This study assesses the same interfaces under long‐term conditions using an in vitro pin‐on‐disk fretting corrosion test apparatus. Preliminary variable‐load frequency testing of typical control pin geometries showed a frequency‐dependent current response, with underlying contact conditions of metal–metal interfaces that remained unchanged. One‐million‐cycle testing showed diminished fretting currents in all groups by 5 × 105 cycles, but consistently lower currents in the high‐compliance group. Corresponding fretting currents and work of fretting measurements of high‐compliance pins confirmed that minimal fretting was experienced at the interface, with elastic bending of the pin accounting for almost all applied displacement. Debris generated during testing were composed of titanium and chromium oxides, small amounts of cobalt and molybdenum oxides, and sodium and phosphate originating from the surrounding test solution. Post‐test analyses of sample surfaces revealed substantially more surface damage on CoCrMo disks than Ti‐6Al‐4V pins, thought to be a result of adhesive wear of mixed oxide debris on the pin and abrasion of the disk by the oxide debris layer. Surface damage to high‐compliance pins suggests some abrasion is unavoidable with geometric modifications.

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Surface and subsurface changes as a result of tribocorrosion at the stem-neck interface of bi-modular prosthesis

Cited by 16 publications

References 39 publications

Retrieval Findings of Recalled Dual-Taper Hips

Retrieval Findings of Recalled Dual-Taper Hips

Atomic Scale Origin of Metal Ion Release from Hip Implant Taper Junctions

Interfacial compliance, energy dissipation, frequency effects, and long‐term fretting corrosion performance of Ti‐6Al‐4V/CoCrMo interfaces

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