14 KB304 KB13 KB200020242001Kocijan, AleksandraMilošev, Ingridštevilka:1/2letnik:354 stranistr. 83-86COBISSID:13163737ISSN:1580-2949URN:URN:NBN:SI:doc-XK1CJRYKslInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeortopedijapoliacetalpolietilenprotezePrimerjava obrabnih delcev polietilena in poliacetala, izoliranih iz tkiva ob izoelastičnih kolčnih protezah| Comparison of polyacetal and polyethylene wear particles isolated from periprosthetic tissues of isoelastic prostheses|Isoelastic prostheses are a special type of total hip replacement consisting of two polymer materials: polyacetal stam and polyethylene acetabulum cup. Dueto relatively poor clinical results their implantation has been restricted during the last decade. In order to reveal the reasons for their unsuccessful clinical performance, we examined the prosthetic components and periprosthetictissue of failed prostheses. A method of tissue digestion using sodium hydroxide followed by centrifugation of the digested tissues was used to separate polyacetal and polyethylene particles. Polyacetal particles were verified by energy-dispersive X-ray spectroscopy (EDS) and polyethylene particles were identified by fourier-transform IR (FTIR) spectroscopy. Scanning electron microscopy (SEM) confirmed that the majority of particles were micrometer in size and their morphology was fibril-like or shred-likeIzoelastične kolčne proteze so posebna vrsta protez, ki so sestavljene iz dvehpolimernih materialov: poliacetalnega debla in polietilenske čašice. Zardirelativno slabih kliničnih rezultatov se v zadnjem desetletju tovrstne proteze ne uporabljajo več. Da bi ugotovili razlog za njihovo neuspešnost, smopreiskovali odstranjene komponente protez ter tkivo okrog le-teh. Za izolacijo delcev smo uporabili metodo bazičnega razkroja tkiva in s centrifugiranjem ločili polietilenske in poliacetalne delce. S spektroskopijo energijske porazdelitve rentgenskih žarkov (EDS) smo identificirali delce poliacetala in z infrardečo spektroskopijo s Fourirjevo transformacijo (FTIR) delce polietilena. Morfologijo delcev smo določili z vrstično elektronsko spektroskopijo (SEM)TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije