Metal-on-metal hips: current status

Ansari, Juned; Matharu, Gulraj S.; Pandit, Hemant

doi:10.1016/j.mporth.2017.11.010

Cited by 12 publications

(9 citation statements)

References 19 publications

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“…Metal-on-metal (MoM) hip bearings were developed due to improved wear characteristics and became very popular, but in the early 2000s it became apparent that metal debris was a serious issue. 22 and MoM hips have a ten year revision rate of 14e27%. 1 Willert et al first described aseptic lymphocyte-dominated vasculitis-associated lesions (ALVAL) in 19 MoM THA revisions.…”

Section: Pathology Related To Metallic Wear Particlesmentioning

confidence: 99%

Metal hypersensitivity in total knee arthroplasty

King

Royeca

Cunningham

et al. 2020

Journal of Arthroscopy and Joint Surgery

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Metals used in total knee arthroplasty cause hypersensitivity reactions in some patients. These reactions are known to be immune-mediated and are more likely to affect individuals with pre-existing metal sensitivity, but their mechanism is not fully known. It is difficult to predict pre-operatively whether a patient will be affected and there is no reliable investigation to guide implant choice. There appears to be little value in screening all patients for metal sensitivity before implantation as various studies have shown no significant difference in outcomes or failure rates post TKA in patients with history of metal sensitivity. However, the existing assessment tools are not specific enough to identify subtle problems with potential metal sensitivity association.Symptoms of hypersensitivity reactions following total knee arthroplasty are often non-specific and difficult to differentiate from other acute presentations following total knee arthroplasty, for example infection. Metal hypersensitivity reactions are often a diagnosis of exclusion, and for this reason they are most likely under-diagnosed and under-reported. Management is controversial but periprosthetic hypersensitivity reactions will often ultimately require revision if no other cause is found. Metal debris are a concern in total hip arthroplasty and could represent another cause of metal-related pathology in total knee arthroplasty. Non-metallic materials are currently in development which may represent a preventative solution for metal hypersensitivity reactions in total knee arthroplasty, potentially also addressing additional concerns around the use of metallic implants such as the high density and thermal conductivity of the material in comparison with the replaced tissue.

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Section: Pathology Related To Metallic Wear Particlesmentioning

confidence: 99%

Metal hypersensitivity in total knee arthroplasty

King

Royeca

Cunningham

et al. 2020

Journal of Arthroscopy and Joint Surgery

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“…As a matter of fact, Severe Plastic Deformation (SPD) processes have been extensively reported for modifying surface properties by altering the surface metallurgical characteristics (e.g. microstructure, hardness, precipitates amount and characteristics, roughness, residual stresses) [2]. Not only mechanical processes are used to change surface characteristics but also thermal processes as laser are employed to modify the surface properties, for example in adhesive joints of non-ferrous materials as shown in this study [3].…”

Section: Introductionmentioning

confidence: 99%

Superfinishing processes applied on the biomedical implants surface to improve their performance

Saffioti

2023

Materials Research Proceedings

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Abstract. The demand of biomedical implants characterized by more and more advanced performances is expected to grow as well as their service life is expected to increase. Therefore, the necessity to research new material properties and production techniques in producing biomedical implants, characterized by higher durability, is strongly required. Regarding permanent prosthesis, the surface conditions play a key role on the prostheses overall mechanical performance. This work aims, through the application of burnishing process, to combine innovative machining finishing operations coupled with environmentally friendly lubricooling techniques to improve the surface integrity of biomedical devices in order to increase their quality, durability and reliability.

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“…Therefore, it is of great significance to study materials with excellent biocompatibility and wear resistance that can meet the application requirements of long-life artificial joints. − At present, joint prosthesis materials are mainly “hard–hard” (metal–metal, ceramic–ceramic) and “hard–soft” (metal–polymer, ceramic–polymer) . However, metal materials will induce poisoning, allergy, and other complications due to the release of metal ions during friction, , and ceramic-based materials are easy to break and produce abnormal noise, which limits the use of “hard–hard” and “hard–soft” prosthesis composite materials. The combination of “soft–soft” prosthesis materials cannot only avoid the above problems but also has the advantages of similar elastic modulus to human bones, low density, easy manufacturing, molding, etc., which makes it have broad application prospects.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of the Poly(ether ether ketone) (PEEK)/Nano-Zinc Oxide (ZnO)–Short Carbon Fiber (SCF) Artificial Joint Composites

Feng

Cen

et al. 2022

ACS Appl. Polym. Mater.

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Poly(ether ether ketone) (PEEK) has excellent biological and mechanical properties and good fatigue resistance. It is expected to replace metal as an artificial joint prosthesis material. But its poor wear resistance and antibacterial properties limit its application. In this paper, ZnO was synthesized on the surface of acidified short carbon fiber (SCF) by in situ synthesis combined with the hydrothermal method. The nano-ZnO-modified SCF powder was used as a reinforcement filler. It was melt-blended with PEEK and then injection-molded to improve the wear resistance and antibacterial property of PEEK. The results show that the microstructure of the PEEK/ZnO-SCF composite is relatively compact, and the addition of ZnO contributes to the combination of SCF and PEEK. The addition of SCF can improve the mechanical properties of composites. When the SCF content is 15%, the mechanical properties of the composite are the best. The PEEK/ZnO-SCF composite shows good antibacterial activity against Escherichia coli and Staphylococcus aureus and has good biocompatibility. In addition, the friction coefficient of the PEEK/ZnO-SCF composites is lower than that of the pure PEEK, and the friction properties are improved. The PEEK/7.5%wtZnO-15%wtSCF composite has the lowest wear loss and the best wear performance. In conclusion, the PEEK/ZnO-SCF composites have good wear resistance and antibacterial properties. The relevant data provide a reference for the PEEK to enter clinical experiments and have important significance for promoting the application of the PEEK in artificial joints.

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Metal-on-metal hips: current status

Cited by 12 publications

References 19 publications

Metal hypersensitivity in total knee arthroplasty

Metal hypersensitivity in total knee arthroplasty

Superfinishing processes applied on the biomedical implants surface to improve their performance

Preparation and Properties of the Poly(ether ether ketone) (PEEK)/Nano-Zinc Oxide (ZnO)–Short Carbon Fiber (SCF) Artificial Joint Composites

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