Bimechanics of pelvic ring fixation techniques

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F18%3A43953242" target="_blank" >RIV/49777513:23520/18:43953242 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Bimechanics of pelvic ring fixation techniques

Popis výsledku v původním jazyce

The study focuses on development of computational tools for prediction and analysis of osteosynthesis of pelvic ring injuries. A set of ten minimally invasive internal fixation techniques is examined and a~unilateral transforaminal sacral bone fracture (Denis type II cite{fakler}) is selected as the reference case for the study. The studied fixation techniques utilise a single or a combination of the four following orthopaedic fixators: iliosacral screw (ISS) cite{giraldez}, transiliac internal fixator (TIFI) cite{dienstknecht}, transiliac plate (TP) cite{suzuki} or sacral bar (SB) cite{gorczyca}. The geometry of the computational model is developed based on CT scans of orthopaedic models of male pelvis. These solid foam models are also used in the experimental campaing that provides input data for validation of the numerical simulations. The experiments study a mechanical response of the model pelvic bones without fracture and a response of fractured bones with a selected fixation technique under physiological loading. Due to the fact that each fixation technique is tested using orthopaedic plastic models, variations in cadaveric samples of pelves are avoided. Thus both experimental and computational studies provide a direct comparison of the stability of selected pelvic ring fixations. Absolute and relative motion of the bone structures is examined, a symmetry of bone deformations along the median sacral crest is assessed, an evolution of the fracture line is tracked and a relative displacement of the fractured bone parts is quantified. The ratio between the stiffness of the treated pelvic structure and the stiffness of the intact model is determined. Results of the numerical simulations are compared to the experimental data and an analysis of the stability of the applied fixation techniques is provided.

Název v anglickém jazyce

Bimechanics of pelvic ring fixation techniques

Popis výsledku anglicky

The study focuses on development of computational tools for prediction and analysis of osteosynthesis of pelvic ring injuries. A set of ten minimally invasive internal fixation techniques is examined and a~unilateral transforaminal sacral bone fracture (Denis type II cite{fakler}) is selected as the reference case for the study. The studied fixation techniques utilise a single or a combination of the four following orthopaedic fixators: iliosacral screw (ISS) cite{giraldez}, transiliac internal fixator (TIFI) cite{dienstknecht}, transiliac plate (TP) cite{suzuki} or sacral bar (SB) cite{gorczyca}. The geometry of the computational model is developed based on CT scans of orthopaedic models of male pelvis. These solid foam models are also used in the experimental campaing that provides input data for validation of the numerical simulations. The experiments study a mechanical response of the model pelvic bones without fracture and a response of fractured bones with a selected fixation technique under physiological loading. Due to the fact that each fixation technique is tested using orthopaedic plastic models, variations in cadaveric samples of pelves are avoided. Thus both experimental and computational studies provide a direct comparison of the stability of selected pelvic ring fixations. Absolute and relative motion of the bone structures is examined, a symmetry of bone deformations along the median sacral crest is assessed, an evolution of the fracture line is tracked and a relative displacement of the fractured bone parts is quantified. The ratio between the stiffness of the treated pelvic structure and the stiffness of the intact model is determined. Results of the numerical simulations are compared to the experimental data and an analysis of the stability of the applied fixation techniques is provided.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů