Numerical Simulation of Electric Field Distribution around an Instrumented Total Hip Stem

Applied Sciences

Yukun Su¹  Thomas Bender¹  Wolfram Mittelmeier¹  Cathérine Ebner¹  Rainer Bader¹  Yogesh Deepak Bansod²  Ulf Zimmermann²  Ursula van Rienen² 

[1] Department of Orthopaedics, University Medicine Rostock, 18057 Rostock, Germany;Institute of General Electrical Engineering, University of Rostock, 18051 Rostock, Germany;

关键词: electrical stimulation;    numerical simulation;    electric field distribution;    experimental validation;    osseointegration;    total hip replacement (THR);   

DOI  :  10.3390/app11156677

来源: DOAJ

【 摘 要 】

Presently, total joint replacement (TJR) is a standard procedure in orthopedic surgery. Adequate osseointegration of the implant components still remains a clinical issue. However, active stimulation of bone tissue to enhance bone ongrowth at the implant surfaces has not been widely investigated so far. For the last several years, invasive electromagnetically induced osseotherapy has been employed in clinical practice, e.g., for the treatment of avascular necrosis, femoral neck fractures, and pseudarthrosis. In the present study, the approach of exploiting the electric stimulation effect was transferred to the field of TJR. Therefore, a commercially available total hip stem was instrumented with an electrode on its surface in order to generate an electric field supporting the regeneration of the surrounding bone tissue. The objective was to conduct numerical simulations validated by experimental investigations as a proof of concept for an instrumented electro-stimulative total hip stem. The results revealed that the calculated electric field around a total hip stem fulfills the requirements to stimulate adjacent bone tissue when using clinically applied electric voltages. The derived numerical and experimental data of electric potentials and corresponding electric fields are encouraging for the implementation of active electrical stimulation in uncemented total hip stems to enhance their osseointegration.

【 授权许可】

Unknown