Almohallami, A.;
Behrens, B.-A.;
Bouguecha, A.;
Lerch, M.;
Betancur, S.;
Stukenborg-Colsman, C.;
Nolte, I.;
Lucas, K.
Numerical analysis of the biomechanical complications accompanying the total hip replacement with NANOS-Prosthetic: bone remodelling and prosthesis migration
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Medientyp:
E-Artikel
Titel:
Numerical analysis of the biomechanical complications accompanying the total hip replacement with NANOS-Prosthetic: bone remodelling and prosthesis migration
Beteiligte:
Almohallami, A.;
Behrens, B.-A.;
Bouguecha, A.;
Lerch, M.;
Betancur, S.;
Stukenborg-Colsman, C.;
Nolte, I.;
Lucas, K.
Erschienen:
Walter de Gruyter GmbH, 2015
Erschienen in:Current Directions in Biomedical Engineering
Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>Aseptic loosening of the prosthesis is still a problem in artificial joint implants. The ýloosening can be caused by the resorption of the bone surrounding ýthe prosthesis according to stress shielding. A numerical model was developed and validated by means of DEXA-studies in order to ýanalyse the bone remodelling process in the periprosthetic bone. A total loss of about 3.7% of the bone density in the periprosthetic Femur with NANOS is computed. The bone remodelling calculation was validated by means of a DEXA-study with a 3-years-follow-up. The model was further developed in order to be able to calculate and consider the migration of the implants. This method was applied on the ýNANOS-implant with a computed total migration of about 0.43 mm. These calculations showed good results in comparison with a 2-year-follow-up clinical study, whereby a RSA-method was used to determine the stem migration in the bone. In order to ýstudy the mutual influence between the implant migration and the hip contact forces ý, a software is developed by our scientific group to couple a multi body simulation (MBS) of human lower limps with the FEA of the periprosthetic Femur.</jats:p>