@article{26520a2c7d8b44a0bc1d33b22efe798a,
title = "Highly porous drug-eluting structures: from wound dressings to stents and scaffolds for tissue regeneration",
abstract = "For many biomedical applications, there is need for porous implant materials. The current article focuses on a method for preparation of drug-eluting porous structures for various biomedical applications, based on freeze drying of inverted emulsions. This fabrication process enables the incorporation of any drug, to obtain an {"}active implant{"} that releases drugs to the surrounding tissue in a controlled desired manner. Examples for porous implants based on this technique are antibiotic-eluting mesh/matrix structures used for wound healing applications, antiproliferative drug-eluting composite fibers for stent applications and local cancer treatment, and protein-eluting films for tissue regeneration applications. In the current review we focus on these systems. We show that the release profiles of both types of drugs, water-soluble and water-insoluble, are affected by the emulsion's formulation parameters. The former's release profile is affected mainly through the emulsion stability and the resulting porous microstructure, whereas the latter's release mechanism occurs via water uptake and degradation of the host polymer. Hence, appropriate selection of the formulation parameters enables to obtain desired controllable release profile of any bioactive agent, water-soluble or water-insoluble, and also fit its physical properties to the application.",
keywords = "biomaterials, controlled release, poly (dl-lactic-co-glycolic acid), porosity, tissue engineering",
author = "Elsner, {Jonathan J.} and Amir Kraitzer and Orly Grinberg and Meital Zilberman",
note = "Funding Information: In all studied groups the wound dressing materials remained in position over the course of treatment and were not disrupted. The dressing material created good contact with the skin, turning transparent in the exudating regions of the wound. All dressing materials used in the study were easily removed from the wound. Notable degradation of the binding matrix occurred in the regions subject to exudation, creating visible voids between the supporting fibers. This finding was supported by SEM photographs of different regions of the retrieved dressing material. The dressing{\textquoteright}s margin demonstrated negligible degradation while its center demonstrated advanced degradation. The fibrous mesh remained intact despite degradation of the binding matrix.113",
year = "2012",
doi = "10.4161/biom.22838",
language = "אנגלית",
volume = "2",
pages = "239--270",
journal = "Biomatter",
issn = "2159-2527",
publisher = "Landes Bioscience",
number = "4",
}
