Abstract

Intra-articular treatments offer the advantage of achieving high active substance concentrations at the site of cartilage lesion. One problem with these drugs is that of low remanence. A method to prolong the survival time of substance inside the joint may improve the cartilage repair and patient symptoms. Targeted therapy aims to optimize the delivery of these drugs set in a solution of magnetic nanoparticles, by injection into the knee joint, in order to increase the residence time of active substances through the application of high magnetic field gradients in the joint area by using extracorporeal magnets. Synthesized magnetic nanoparticles, which were covered by layer-by-layer method in consecutive layers of protection, are stable and retain their character and magnetic-polymer composites features required to be used for their intended purpose. FTIR analysis demonstrated the presence of iron salts in the synthesized ferrofluid, and of the characteristic groups of polymer coating which demonstrated that the technique of embedding in polymer layers by layer-by-layer method is viable.

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