Chiyambi cha ma implants a m'chiuno ndi kuyesa kwa biomarker
Ilona Świątkowska, ... Alister J. Hart, inMa Biomarkers a Hip Implant Function, 2023
1.2.1.2 Ma polima apulasitiki
Kulemera kwambiri kwa maselopolyethylene(UHMWPE) ndisemicrystalline polimandi mbiri yakale yogwiritsidwa ntchito muwa mafupamapulogalamu, makamaka muacetabularliners kwaMtengo wa THR implants.Zomwe zili ndi coefficient yocheperako, ndizogwirizana ndi biocompatible, komanso zotsika mtengo kupanga.
Komabe, zikakumana ndi zolimba, UHMWPE imatulutsa tinthu tating'onoting'ono tomwe titha kubweretsafupa resorptionkuzungulirakuika(periprosthetic osteolysis),kuseptic kumasuka(kutayika kwa implants fixation pakalibe matenda), komanso kulephera kwamakina koyambirira.Pofuna kuchepetsa kuchuluka kwa zotsatira zoyipazi, kuyesayesa kwakukulu kwapangidwa kuti kuonjezere kuchuluka kwa kulumikizana mkati mwa UHMWPE.
M'badwo woyamba wolumikizana kwambiri ndi UHMWPE (HXLPE) zomangira, zomwe zidayambitsidwa m'zaka za m'ma 1990, zidatsitsidwa ndi gamma kenako zidasinthidwa ndi thermally (zolowetsedwa kapena kusungunulidwa) kuti ziwongolere kukana kwawo.ma free radicalsanalengedwa pa walitsa.Palibe njira iliyonse yomwe idatulutsa zotsatira zabwino: annealing inalephera kuthetsa ma radicals onse aulere, pomwe kusungunula kudapangitsa kuti chinthu chokhala ndi ma free radicals osadziwika koma kuchepetsedwa.crystallinityndi kuwonjezereka kwa chiwopsezo cha kutopa (Kurtz et al., 2011).
Kuyesera kuthana ndi zovuta izi, m'badwo wotsatira wa ma liner a HXLPE cholinga chake ndi kukwaniritsa kukana kwa okosijeni ndikusunga kukana kwamphamvu kwa zida za m'badwo woyamba ndi makina.mphamvupolyethylene wamba;njira ziwiri zomwe zinagwiritsidwa ntchito zinali zotsatizana ndi waya ndi annealing, ndivitamini Edoping (vitamini E imakhala ngati mkangaziwisi waulere) (D'Antonio et al., 2012; Oral and Muratoglu, 2011).
Ngakhale kuda nkhawa koyambirira, HXLPE ya m'badwo woyamba imawonetsa zotsatira zabwino kwambiri zama radiographic komanso moyo wautali, ngakhale achichepere komanso achangu.odwala(Lim et al., 2019).HXLPE ya m'badwo wachiwiri idapereka zotsatira zanthawi yayitali mpaka pakati, koma kutsata kwanthawi yayitali kudzafunika kuti muwone ngati mapangidwewa ali ndi mwayi wachipatala kuposa ma liner a m'badwo woyamba (Langlois ndi Hamadouche, 2020).
Nthawi yotumiza: Jun-26-2023
