Comput. Biol. Med. - Design, analysis and verification of a knee joint oncological prosthesis finite element model.

Tópicos

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Resumo

CKGROUND: The aim of this paper was to design a finite element model for a hinged PROSPON oncological knee endoprosthesis and to verify the model by comparison with ankle flexion angle using knee-bending experimental data obtained previously.METHOD: Visible Human Project CT scans were used to create a general lower extremity bones model and to compose a 3D CAD knee joint model to which muscles and ligaments were added. Into the assembly the designed finite element PROSPON prosthesis model was integrated and an analysis focused on the PEEK-OPTIMA hinge pin bushing stress state was carried out. To confirm the stress state analysis results, contact pressure was investigated. The analysis was performed in the knee-bending position within 15.4-69.4? hip joint flexion range.RESULTS: The results showed that the maximum stress achieved during the analysis (46.6 MPa) did not exceed the yield strength of the material (90 MPa); the condition of plastic stability was therefore met. The stress state analysis results were confirmed by the distribution of contact pressure during knee-bending.CONCLUSION: The applicability of our designed finite element model for the real implant behaviour prediction was proven on the basis of good correlation of the analytical and experimental ankle flexion angle data.

Resumo Limpo

ckground aim paper design finit element model hing prospon oncolog knee endoprosthesi verifi model comparison ankl flexion angl use kneebend experiment data obtain previouslymethod visibl human project ct scan use creat general lower extrem bone model compos d cad knee joint model muscl ligament ad assembl design finit element prospon prosthesi model integr analysi focus peekoptima hing pin bush stress state carri confirm stress state analysi result contact pressur investig analysi perform kneebend posit within hip joint flexion rangeresult result show maximum stress achiev analysi mpa exceed yield strength materi mpa condit plastic stabil therefor met stress state analysi result confirm distribut contact pressur kneebendingconclus applic design finit element model real implant behaviour predict proven basi good correl analyt experiment ankl flexion angl data

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