10 Drug delivery systems for medical use, namely, surgical instruments and materials being sutures, orthopedic and dental nails, screws, staples, wires, pins, sponges, metal and polymeric implants, all coated with polymer-lipid matrix for sustained drug delivery; Drug delivery systems for medical use, namely, surgical instruments and materials being sutures, orthopedic and dental nails, screws, staples, wires, pins, sponges, metal and polymeric implants, all impregnated with polymer-lipid matrix for sustained antibiotic drug delivery; Drug delivery systems for medical use, namely, surgical instruments and materials being sutures, orthopedic and dental nails, screws, staples, wires, pins, sponges, metal and polymeric implants, all coated with polymer-lipid matrix for sustained antibiotic drug delivery