Mixed‐metal fretting corrosion of Ti6Al4V and wrought cobalt alloy

Kawalec, Jill S.; Brown, Stanley A.; Payer, Joe H.; Merritt, Katharine

doi:10.1002/jbm.820290712

Cited by 66 publications

(47 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The literature unequivocally demonstrates that design-and material-related parameters influence micro-motion and [8,9,11,13,15]. However, no differences in total titanium release were found for the implant designs tested here.…”

Section: Discussionmentioning

confidence: 54%

“…A similar study on a modular neck hip implant design made of a titanium alloy revealed material loss of between 280 and 1,640 µg after 5.5×10 6 loading cycles [22]. Another study on a titanium plate-screw connection resulted in a titanium release of 849 µg after 1.2×10 6 loading cycles [13]. Lower concentrations ranging from 3 to 21 µg were also reported for plate-screw connections [11].…”

Section: Discussionmentioning

confidence: 82%

See 1 more Smart Citation

Metal release and corrosion effects of modular neck total hip arthroplasty

Kretzer

Jakubowitz

Krachler

et al. 2009

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

Modular neck implants are an attractive treatment tool in total hip replacement. Concerns remain about the mechanical stability and metal ion release caused by the modular connection. Five different implant designs were investigated in an experimental set-up. In vivo conditions were simulated and the long-term titanium release was measured. Finally, the modular connections were inspected for corrosion processes and signs of fretting. No mechanical failure or excessive corrosion could be identified for the implants tested. The titanium releases measured were extremely low compared to in vivo and in vitro studies and were not in a critical range.Résumé Dans les prothèses totales de hanche l'utilisation d'implants avec col modulaire est d'une utilisation fré-quente et pratique. Néanmoins, cette utilisation laisse persister des doutes sur la stabilité mécanique et sur le relargage des ions métalliques. 5 différents implants ont été étudiés en reproduisant les conditions in vivo, en mesurant le relargage de titane et en évaluant la corrosion et les lésions du col. Ce travail n'a pas permis de mettre en évidence d'échec secondaire à une corrosion excessive, et les taux de titane sont restés extrêmement bas dans les limites de l'acceptable.

show abstract

Section: Discussionmentioning

confidence: 54%

Section: Discussionmentioning

confidence: 82%

Metal release and corrosion effects of modular neck total hip arthroplasty

Kretzer

Jakubowitz

Krachler

et al. 2009

International Orthopaedics (SICOT)

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5][6][7][8][9][10][11][12] Initially, corrosion was thought to result from a galvanic process due to the coupling of Ti-6Al-4V alloy with CoCrMo alloy. 2 This hypothesis was rejected by the finding of comparable corrosion products in similar alloy (CoCrMo/CoCrMo) couples.…”

Section: Introductionmentioning

confidence: 99%

“…10 Other variables include local environmental conditions, such as pH and the presence of proteins in the modular junction. 1,11,12 Crevice, galvanic, and fretting corrosion are all possible in modular junctions.…”

Section: Introductionmentioning

confidence: 99%

Effect of impact assembly on the fretting corrosion of modular hip tapers

Mroczkowski¹,

Hertzler²,

Humphrey³

et al. 2005

Journal Orthopaedic Research

112

View full text Add to dashboard Cite

The goal of this study was to determine the effect of assembly load and local assembly environmental conditions on the fretting corrosion of modular femoral stem tapers. Femoral head/ taper assemblies in both similar (CoCrMo/CoCrMo) and mixed (CoCrMo/Ti-6Al-4V) alloy combinations were evaluated using an electrochemical test method. Specimens were assembled under impact loading and by hand, in both wet and dry conditions. Incremental cyclic loads ranging from 89 to 5,340 N were applied at a frequency of 3 Hz in Ringer's solution at ambient temperature. During the test, both the open circuit potential (OCP) and fretting current (i fret ) were measured using a saturated calomel electrode (SCE) and counter electrode, respectively. The results were comparable for both mixed and similar alloy couples. Decreases in OCP and increases in i fret (indicators of oxide film fracture and repassivation) were seen with increasing load magnitude, often occurring at loads well below those expected clinically. OCP at the 5,340 N cyclic load ranged from À30.4 to À103.7 mV versus SCE for similar alloy couples, and À19.1 to À181.4 mV versus SCE for mixed alloy couples. Mean peak fretting currents ranged from 0.84 to 1.42 mA and 1.06 to 3.12 mA for similar and mixed alloy couples, respectively. The larger current magnitudes and more negative shifts in OCP for mixed alloy couples indicate the difference in oxide film fracture behavior between titanium and cobalt alloys. The load at which OCP began to drop (onset of fretting) was dependent upon the assembly conditions for both material couples. Specimens assembled with impact loads in air showed the highest resistance to fretting. The results of this study indicate that the assembly load and the environment both play a role in the initial stability of modular hip taper connections.

show abstract

“…about fretting and crevice corrosion at the modular taper junction, particularly with mixed-metal junctions, were reported 4,[6][7][8][9][10] . Subsequent design and manufacturing improvements minimized these concerns, allowing a nearly universal adoption of modular femoral head-neck tapers in modern total hip arthroplasty.…”

mentioning

confidence: 99%