Trunnionosis

Balso, Christopher Del; Schemitsch, Emil H.; Lanting, Brent A.

doi:10.1002/9781119413936.ch29

Cited by 1 publication

(3 citation statements)

References 31 publications

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“…Compared with pitting corrosion, as the crevice environment becomes more corrosive, the activation energy is lowered, producing more acidic conditions, which increases the reaction energy for corrosion . It is revealed that a partial seal is only established at the neck head taper connecting finite point . With this, the trunnion obstructed area poses difficulty to the diffusion of ions, and oxygen becomes depleted, thus limiting the implant repassivation potential and increasing the hydrogen and chloride ion concentrations .…”

Section: Corrosion In Arthroplastymentioning

confidence: 99%

“…32 It is revealed that a partial seal is only established at the neck head taper connecting finite point. 52 With this, the trunnion obstructed area poses difficulty to the diffusion of ions, and oxygen becomes depleted, thus limiting the implant repassivation potential and increasing the hydrogen and chloride ion concentrations. 52 As described earlier, 26,53 this condition can generate a low pH environment which exacerbates corrosion from the low oxygen concentration that limits protective metal oxide formation.…”

Section: Crevice Corrosionmentioning

confidence: 99%

“…52 With this, the trunnion obstructed area poses difficulty to the diffusion of ions, and oxygen becomes depleted, thus limiting the implant repassivation potential and increasing the hydrogen and chloride ion concentrations. 52 As described earlier, 26,53 this condition can generate a low pH environment which exacerbates corrosion from the low oxygen concentration that limits protective metal oxide formation. Concurrently, there are increased chloride ions which enhance passive film solubility with the deterioration of its stability.…”

Section: Crevice Corrosionmentioning

confidence: 99%

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Corrosion of Metals During Use in Arthroplasty

Ude

Dzidotor

Iloeje

et al. 2023

ACS Appl. Bio Mater.

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Arthroplasty implants can undergo corrosion at the modular components, trunnion, and hinges, owing to implant material makeup, micromotion, and interaction with body fluid. In this review, various mechanisms of corrosion in arthroplasty were explored with suggestions on means of improvement. We identified 10 methods including pitting, crevice, mechanically assisted crevice corrosion, fretting, fretting initiated crevice corrosion, mechanically assisted taper corrosion, galvanic corrosion, stress/ tension, fatigue corrosion, and inflammatory cell induced corrosion. The position of implants on the galvanic series, and their ability to maintain passivation contribute to their longevity in service. Due to the relative motion of arthroplastic components, bio-tribocorrosion may disrupt passive oxide films, and pitting is initiated at interfaces. Thus, corrosion in arthroplasty as an electrochemical phenomenon mainly starts on one spot and progresses in 3 steps: (1) the oxidative dissolution of metal from implant surfaces into the aqueous active environment, releasing cations, (2) the attraction of electrons to the opposite charge created at another point of the implant surface, producing current flow, and (3) the formation of oxides of metal and metal hydroxides deposited as rust at the surface of the implant. Recent innovations in material manufacturing continue to improve the efficiency of arthroplasty; however, the component parts remain susceptible to biotribocorrosion. Thus, a complete eradication of corrosion in arthroplasty would require futuristic materials with improvement in recent materials and designs, derived from knowledge of existing retrieved implants, and strategies to provide overall surface finishes that protect against bio-tribocorrosion.

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Section: Corrosion In Arthroplastymentioning

confidence: 99%