Nhanganyaya kune hip implants uye biomarker bvunzo
Ilona Świątkowska, ... Alister J. Hart, inBiomarkers yeHip Implant Basa, 2023
1.2.1.2 Polima dzepurasitiki
Ultra-yakakwirira-molecular-uremupolyethylene(UHMWPE) arisemicrystalline polymerine nhoroondo refu yekushandiswa mukatichiremba wemapfupamaapplication, kunyanya muacetabularliners zveTHR kudyara.Izvo zvinhu zvine yakaderera coefficient yekukwesha, ndeye biocompatible, uye isingadhure kugadzira.
Nekudaro, kana ikasangana nenzvimbo dzakaoma, UHMWPE inoburitsa ma micrometre saizi zvidimbu, izvo zvinogona kutungamirabone resorptionkumativi osekudyara(periprosthetic osteolysis),aseptic kusunungura(kurasikirwa kwekugadzirisa kwekudyara mukusavapo kwehutachiona), uye kutadza kwekutanga kwemagetsi.Kudzikisa kuwanda kweaya akashata mhedzisiro, kuedza kwakawanda kwakaitwa kuwedzera dhigirii rekuyambuka mukati meUHMWPE.
Chekutanga-chizvarwa chakanyanya kuchinjika UHMWPE (HXLPE) liner, yakaunzwa mukiriniki muma1990s, yaive gamma irradiated uye ndokuzogadziriswa thermally (yakanyungudutswa kana kunyungudutswa) kuvandudza kuramba kwavo.free radicalsyakagadzirwa panguva yeirradiation.Hapana maitiro akaburitsa mhedzisiro yakakwana: annealing yakatadza kubvisa ese emahara radicals, uku kunyungudika kwakakonzera chinhu chine isingaonekwe emahara radicals asi chakaderedzwa.crystallinityuye kuwedzera kukonzeresa kuneta kuputika (Kurtz et al., 2011).
Kuedza kugadzirisa zvipingamupinyi izvi, chizvarwa chinotevera cheHXLPE liners chakanangana nekuwana oxidative kuramba uku uchichengetedza kupfeka kwakanyanya kwechinhu chekutanga chechizvarwa uye michina.simbayezvakajairwa polyethylene;nzira mbiri dzakashandiswa dzaive sequential irradiation uye annealing, uyevitamini Edoping (vitamin E inoshanda senge yakasununguka-yakajeka scavenger) (D'Antonio et al., 2012; Oral uye Muratoglu, 2011).
Kunyangwe kunetseka kwekutanga, chizvarwa chekutanga HXLPE inoratidza yakanakisa radiographic mhedzisiro uye hupenyu hurefu, kunyangwe mudiki uye anoshanda.varwere(Lim et al., 2019).Yechipiri-chizvarwa HXLPE yakaunza inovimbisa yenguva pfupi-kusvika yepakati-yenguva mhedzisiro, asi-kutevera-kwenguva refu kunozodikanwa kuti uone kana aya magadzirirwo ane mukana wekiriniki pane yekutanga chizvarwa liner (Langlois naHamadouche, 2020).
Nguva yekutumira: Jun-26-2023
