25 KB392 KB23 KB200020242011Godec, Matjažštevilka:2letnik:45str. 85-90ISSN:1580-2949COBISSID:855210URN:URN:NBN:SI:doc-VN7Z1MUQenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijematerialinekovinski vključkinerjavno jekloobrabapolietilenprotezeMaterial failure of an AISI 316L stainless steel hip prosthesis| Napake materiala v kolčni protezi iz nerjavnega jekla AISI 316L|One of the major successes of modern surgery is the total replacement of joints by timplantation of prosthetic components by which the pain is relieved and deformity is corrected. The aseptic loosening of a prosthetic-joint component is the most common reason for joint-revision surgery. Furthemore, it is thought that wear particles are one of the major contributors to the development and perpetuation of aseptic loosening. It was ascertained that besides wear particles originated from polyethylene acetabular cup, the main reason of loosening hip prosthesis was due to the material failure. Based on stem material examination by different techniques it was found out that improper microstructure caused additional abrasion by hard particles and aseptic loosening took placeVelik uspeh moderne kirurgije je med drugimi tudi popolna nadomestitev sklepov s protetičnimi nadomestki, s katerimi se omilijo bolečine in korigira deformacija. Pogosto pride do aseptičnega omajanja in potrebe po ponovni operaciji. Vzrok za to je ravno v obrabi in nastanku drobnih obrabnih delcev, ki večinoma vodijo do komplikacij in omajanja proteze. V raziskavi smo pokazali, da je poleg delcev, ki so izvirali iz polietilenske čašice bil glavni razlog omajanja ravno v napaki materiala. Na osnovi analize stebla materiala z različnimi tehnikami smo pokazali, da je neustrezna mikrostruktura povzročila dodatno abrazijo zaradi trdih delce in tako povzročila omajanjeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije