Računarska i eksperimentalna analiza naponskog stanja tela cementne endoproteze zgloba kuka

  • Slobodan Tabaković Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
  • Jovan Grujić Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
  • Milan Zeljković Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
  • Zoran Blagojević Institute for Orthopedic Surgery “Banjica”, Belgrade, Serbia
  • Bojan Radojević Institute for Orthopedic Surgery “Banjica”, Belgrade, Serbia
  • Zoran Popović Clinic for Orthopedic Surgery and Traumatology, Military Medical Academy, Belgrade, Serbia
  • Aleksandar Živković Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
  • Vladan Stevanović Institute for Orthopedic Surgery “Banjica”, Belgrade, Serbia
DOI: https://doi.org/10.2298/3528
Ključne reči: arthroplasty, replacement, hip||, ||kuk, artroplastika, fractures, stress||, ||prelomi usled zamora, computer simulation||, ||simulacije, kompjuterske.,

Sažetak


Uvod/Cilj. Jednu od mogućih komplikacija posle ugradnje cementne endoproteze zgloba kuka predstavlja prelom tela endoproteze. Prelomi nastaju kao posledica preopterećenja ili zamora materijala od koga je napravljan implantat. Cilj ispitivanja bio je da se odredi intenzitet maksmalnih napona i kritičnog preseka u telu endoproteze. Metode. Jednosmerno promenjive sile koje deluju u zglobu kuka prilikom hoda i opterećenja imaju za rezultat elastične deformacije tela endoproteze. Biomehaničkom analizom sila koje deluju u zglobu kuka određuju se njihov pravac i intenzitet, a na osnovu Gruenove raspodele razlabavljenja tela endoproteze i nivo uklještenja. Ispitivana su tela cementne endoproteze zgloba kuka izrađene od legure kobalt-hrom-molibden (CoCrMo) pogodne za livenje u vakumu. Analiza kritičnih napona u telu endproteze izvedena je na telu endoproteze metodom konačnih elemenata. Eksperimentalna verifikacija dobijenih rezultata sprovedena je na fizičkom prototipu u laboratorijskim uslovima Rezultati. Računarskom analizom pomoću metode konačnih elemenata određeno je naponsko stanje kroz izračunavanje maksimalnih Von Misses-ovih napona i kritični preseci za različite uglove delovanja rezultantne sile. Rezultati dobijeni računarskom i eksperimentalnom metodom u korelaciji su i uporedivi su sa rezultatima sličnih analiza na različitim tipovima endoproteza. Zaključak. Istraživanja opisana u radu predstavljaju osnovu za usavršavanje procesa projektovanja endoproteza zgloba kuka i njihovo prilagođavanje svakom bolesniku posebno (custom made).

Biografije autora

Slobodan Tabaković, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia

Departman za proizvodno mašinstvo

Docent

Milan Zeljković, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
Departman za proizvodno mašinstvo

Redovni profesor
Zoran Blagojević, Institute for Orthopedic Surgery “Banjica”, Belgrade, Serbia
Prof. dr sci. med.
Bojan Radojević, Institute for Orthopedic Surgery “Banjica”, Belgrade, Serbia
Dr sci. med.
Zoran Popović, Clinic for Orthopedic Surgery and Traumatology, Military Medical Academy, Belgrade, Serbia

Prof. dr sci. med.

brigadni general

Aleksandar Živković, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia

Departman za proizvodno mašinstvo

Asistent sa doktoratom

Vladan Stevanović, Institute for Orthopedic Surgery “Banjica”, Belgrade, Serbia
Mr sci. med. dr

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Objavljeno
2015/04/24
Broj časopisa
Vol. 71 Br. 11 (2014)
Rubrika
Originalni članak