Notícies20.09.2018Publicació de l'article “Cross-linked polyethylene does not reduce wear in total knee arthroplasty” |
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La Sra. Eva Prats, tècnic de la tecnologia SEM i el Sr. Paco Menéndez d'Anàlisi de Metalls han participat en l'article: “Cross-linked polyethylene does not reduce wear in total knee arthroplasty” que ha estat publicat a la revista Revista Española de Cirugía Ortopédica y Traumatología (Volume 62, Issue 3, May–June 2018, Pages 197-203). Aquest treball és resultat de la col·laboració amb l'equip del Dr. F.Maculé de la Unitat de Genoll, del Servei de Cirurgia Ortopèdica i Traumatologia de l'Hospital Clínic de la Universitat de Barcelona. Les preparacions de les mostres estudiades han estat realitzades al Laboratori de la Unitat d’Anàlisis Elemental i per les observacions s’han emprat diferents microscopis electrònics de rastreig dels CCiTUB així com també els detectors de microanàlisis per separació d’energies de raigs-X (EDS) acoplats a ells. El resum de l'article és el següent: "Aim: To compare two different types of inserts: Ultra-high molecular weight polyethylene (UHMWPE) and cross-linked polyethylene with a quantitative and qualitative study of polyethylene wear particles in synovial fluid 3 years after total knee arthroplasty. Material and methods: A prospective, randomized, controlled cohort study with blinded evaluation was carried out on 25 patients undergoing staged bilateral total knee replacement, 6 months apart. Knee arthrocentesis was performed on 12 patients 3 years after surgery, and the polyethylene particles were analyzed. Results: No significant differences were found in the number of particles generated by the two different types of inserts at 3 years from total knee arthroplasty (3,000×: cross-linked = 849.7; UHMWPE = 796.9; P = .63; 20,000×: cross-linked = 66.3; UHMWPE = 73.1; P = .76). Likewise, no differences in the probability of finding elongated (χ2 = 0.19; P = .66) or rounded (χ2 = 1.44; P = .23) particles in both types of inserts were observed. However, the probability of finding fibrillar particles is 3.08 times greater in UHMWPE. Conclusions: Cross-linked polyethylene does not significantly reduce the generation of polyethylene particles in patients with total knee arthroplasty, 3 years after the surgical procedure". Per a més informació, poden accedir al següent link: [+]. |
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