20.500.12556/RUL-94430 Primerjava pritrditev ploščice za oskrbo zloma kosti s klasičnimi in kotno-stabilnimi vijaki Comparison of plate fixations for bone fracture treatment with non-locking and locking screws V zaključni nalogi smo obravnavali zdravljenje zloma dolge kosti z različnimi metodami pritrditve ploščice z vijaki. V začetnem delu smo na kratko opisali sestavo in mehanske lastnosti kosti, opravili smo pregled materialov in izvedb pritrditev s ploščicami. V nadaljevanju smo z numeričnimi simulacijami proučili napetosti v kosti pri upogibni obremenitvi sistema s klasično in kotno-stabilno zvezo. V programskem okolju Ansys smo zasnovali štiri različne modele pritrditve in jih obremenili v elastičnem območju. Rezultati so pokazali, da so v vseh primerih najbolj obremenjene izvrtine ob zlomu. V primerih stika kosti in ploščice se pojavijo velike lokalne napetosti ob robu zloma in stika. Ugotovljeno je bilo, da se pri kotno-stabilni zvezi napetosti prenašajo le prek vijaka na kost, pri klasični pritrditvi pa se napetosti prenašajo tudi prek stika ploščice in kosti. Obravnavane so bile biološke in mehanske prednosti in slabosti glede na literaturo. The final thesis discusses the treatment of a bone fracture with different methods of plate attachment with screws. In the first part, we briefly describe structure and mechanical properties of the bone, we examine the materials and present different plate fixations. Later on, we made numerical simulations, to study stresses in the bone due to bending by two different methods of implant attachment – a classical connection and a locking connection. In the Ansys program environment, four different models of fixture were designed and loaded in an elastic range. Results showed that in all cases the highest stress was found in holes nearest to the fracture site. In cases where plate and bone are connected, high local stress is found on the edge of the fracture and contact. It was found that in the case of a locking plate, the stress is transmitted only through the screw to bone contact; while in the case of conventional plate, the stress is also transmitted through the contact between plate and bone. Mechanical and biological advantages and disadvantages were discussed, according to the literature. kotno-stabilna ploščica klasična ploščica zlom kosti metoda končnih elementov napetost locking plate conventional plate bone fracture finite element method stress true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2017-08-25 07:15:09 2017-08-25 07:15:23 2023-10-20 12:23:00 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 194555 582.pdf 582.pdf 1 B78865647CFB9C929242D617FD5AB4D7 3e492b52bbed82483f66d6c4e35258fe178b7818608442e196c410b28b4d7c7f 851bc133-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/7aee408f-172b-488b-82fe-fa24d60c61c2 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=102647 Fakulteta za strojništvo 0 0 0