Gabatarwa ga ƙwanƙwasa hips da gwajin biomarker
Ilona Świątkowska, ... Alister J. Hart, inAlamar Halittar Hip Implant Aiki, 2023
1.2.1.2 Filastik polymers
Ultra-high-molecular-weightpolyethylene(UHMWPE) aSemirystalline polymertare da dogon tarihin amfani a cikilikitan orthopedicaikace-aikace, musamman a cikinacetabularliners donTHR implants.Kayan yana da ƙarancin ƙima na juzu'i, yana da jituwa, kuma mara tsada don samarwa.
Koyaya, lokacin da ake hulɗa da filaye masu ƙarfi, UHMWPE tana fitar da barbashi masu girman micrometer, waɗanda zasu iya haifar daresorption kashikewaye dadasa(periprosthetic osteolysis),sako-sako da aseptic(asarar gyaran gyare-gyare a cikin rashin kamuwa da cuta), da kuma gazawar injiniya na farko.Don rage yaɗuwar waɗannan illolin, an yi ƙoƙari da yawa don ƙara ƙimar haɗin kai tsakanin UHMWPE.
Na farko-ƙarni masu haɗin kai sosai na UHMWPE (HXLPE), waɗanda aka gabatar da su a asibiti a cikin 1990s, an lalatar da gamma sannan kuma ana sarrafa su ta thermal (annealed ko narke) don inganta juriya ga su.masu tsattsauran ra'ayihalitta a lokacin irradiation.Babu wani tsari da ya samar da cikakkiyar sakamako: annealing ya kasa kawar da duk masu tsattsauran ra'ayi, yayin da remelting ya haifar da wani abu tare da radicals kyauta wanda ba a iya ganowa amma an rage shi.crystallinityda kuma ƙara haɓakawa ga fashe gajiya (Kurtz et al., 2011).
Don ƙoƙarin magance waɗannan matsalolin, ƙarni na gaba na layin HXLPE sun yi niyya don cimma juriya na iskar oxygen yayin da suke riƙe juriya mai ƙarfi na kayan ƙarni na farko da injiniyoyi.ƙarfina al'ada polyethylene;Hanyoyi biyun da aka yi amfani da su sune raɗaɗi mai bi da bi da lalatawa, dabitamin Edoping (bitamin E yana aiki a matsayin mai ɓarna mai ɓarna) (D'Antonio et al., 2012; Oral da Muratoglu, 2011).
Duk da damuwar farko, HXLPE na ƙarni na farko yana nuna kyakkyawan sakamako na rediyo da tsawon rai, har ma a cikin matasa da masu aiki.marasa lafiya(Lim et al., 2019).HXLPE na ƙarni na biyu ya ba da sakamako mai ban sha'awa na ɗan gajeren lokaci zuwa tsakiyar lokaci, amma za a buƙaci bin dogon lokaci don tabbatar da ko waɗannan ƙirar suna da fa'idar asibiti akan masu layin farko (Langlois da Hamadouche, 2020).
Lokacin aikawa: Juni-26-2023
